third_party/libgcrypt/configure.ac
author Ben Bucksch <ben.bucksch@beonex.com>
Sat, 15 Feb 2020 12:54:00 +0200
changeset 37355 f66ebccec17986b2a453c42a40e1c53f0042518d
parent 35383 51aa7c327951cbd514230dc5cef7970476fe8baf
child 38064 39e1d01fb0c37b7f70bc92d58a9a06f8148e6981
permissions -rw-r--r--
Bug 1615137 - Remove duplicate include of lightning-toolbar.dtd file. r=pmorris DONTBUILD

# Configure.ac script for Libgcrypt
# Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2006,
#               2007, 2008, 2009, 2011 Free Software Foundation, Inc.
# Copyright (C) 2012-2017  g10 Code GmbH
#
# This file is part of Libgcrypt.
#
# Libgcrypt is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as
# published by the Free Software Foundation; either version 2.1 of
# the License, or (at your option) any later version.
#
# Libgcrypt is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this program; if not, see <http://www.gnu.org/licenses/>.

# (Process this file with autoconf to produce a configure script.)
AC_REVISION($Revision$)
AC_PREREQ(2.60)
min_automake_version="1.14"

# To build a release you need to create a tag with the version number
# (git tag -s libgcrypt-n.m.k) and run "./autogen.sh --force".  Please
# bump the version number immediately after the release and do another
# commit and push so that the git magic is able to work.  See below
# for the LT versions.
m4_define(mym4_version_major, [1])
m4_define(mym4_version_minor, [8])
m4_define(mym4_version_micro, [4])

# Below is m4 magic to extract and compute the revision number, the
# decimalized short revision number, a beta version string, and a flag
# indicating a development version (mym4_isgit). Note that the m4
# processing is done by autoconf and not during the configure run.
m4_define(mym4_version,
          [mym4_version_major.mym4_version_minor.mym4_version_micro])
m4_define([mym4_revision],
          m4_esyscmd([git rev-parse --short HEAD | tr -d '\n\r']))
m4_define([mym4_revision_dec],
          m4_esyscmd_s([echo $((0x$(echo ]mym4_revision[|head -c 4)))]))
m4_define([mym4_betastring],
          m4_esyscmd_s([git describe --match 'libgcrypt-[0-9].*[0-9]' --long|\
                        awk -F- '$3!=0{print"-beta"$3}']))
m4_define([mym4_isgit],m4_if(mym4_betastring,[],[no],[yes]))
m4_define([mym4_full_version],[mym4_version[]mym4_betastring])

AC_INIT([libgcrypt],[mym4_full_version],[http://bugs.gnupg.org])

# LT Version numbers, remember to change them just *before* a release.
#   (Interfaces removed:    CURRENT++, AGE=0, REVISION=0)
#   (Interfaces added:      CURRENT++, AGE++, REVISION=0)
#   (No interfaces changed:                   REVISION++)
LIBGCRYPT_LT_CURRENT=22
LIBGCRYPT_LT_AGE=2
LIBGCRYPT_LT_REVISION=4


# If the API is changed in an incompatible way: increment the next counter.
#
# 1.6: ABI and API change but the change is to most users irrelevant
#      and thus the API version number has not been incremented.
LIBGCRYPT_CONFIG_API_VERSION=1

# If you change the required gpg-error version, please remove
# unnecessary error code defines in src/gcrypt-int.h.
NEED_GPG_ERROR_VERSION=1.25

PACKAGE=$PACKAGE_NAME
VERSION=$PACKAGE_VERSION

AC_CONFIG_AUX_DIR([build-aux])
AC_CONFIG_SRCDIR([src/libgcrypt.vers])
AM_INIT_AUTOMAKE([serial-tests dist-bzip2])
AC_CONFIG_HEADER(config.h)
AC_CONFIG_MACRO_DIR([m4])
AC_CONFIG_LIBOBJ_DIR([compat])
AC_CANONICAL_HOST
AM_MAINTAINER_MODE
AM_SILENT_RULES

AC_ARG_VAR(SYSROOT,[locate config scripts also below that directory])

AH_TOP([
#ifndef _GCRYPT_CONFIG_H_INCLUDED
#define _GCRYPT_CONFIG_H_INCLUDED

/* Enable gpg-error's strerror macro for W32CE.  */
#define GPG_ERR_ENABLE_ERRNO_MACROS 1
])

AH_BOTTOM([
#define _GCRYPT_IN_LIBGCRYPT 1

/* If the configure check for endianness has been disabled, get it from
   OS macros.  This is intended for making fat binary builds on OS X.  */
#ifdef DISABLED_ENDIAN_CHECK
# if defined(__BIG_ENDIAN__)
#  define WORDS_BIGENDIAN 1
# elif defined(__LITTLE_ENDIAN__)
#  undef WORDS_BIGENDIAN
# else
#  error "No endianness found"
# endif
#endif /*DISABLED_ENDIAN_CHECK*/

/* We basically use the original Camellia source.  Make sure the symbols
   properly prefixed.  */
#define CAMELLIA_EXT_SYM_PREFIX _gcry_

#endif /*_GCRYPT_CONFIG_H_INCLUDED*/
])

AH_VERBATIM([_REENTRANT],
[/* To allow the use of Libgcrypt in multithreaded programs we have to use
    special features from the library. */
#ifndef _REENTRANT
# define _REENTRANT 1
#endif
])


AC_SUBST(LIBGCRYPT_LT_CURRENT)
AC_SUBST(LIBGCRYPT_LT_AGE)
AC_SUBST(LIBGCRYPT_LT_REVISION)
AC_SUBST(PACKAGE)
AC_SUBST(VERSION)
AC_DEFINE_UNQUOTED(PACKAGE, "$PACKAGE", [Name of this package])
AC_DEFINE_UNQUOTED(VERSION, "$VERSION", [Version of this package])
VERSION_NUMBER=m4_esyscmd(printf "0x%02x%02x%02x" mym4_version_major \
                          mym4_version_minor mym4_version_micro)
AC_SUBST(VERSION_NUMBER)


######################
##  Basic checks.  ### (we need some results later on (e.g. $GCC)
######################

AC_PROG_MAKE_SET
missing_dir=`cd $ac_aux_dir && pwd`
AM_MISSING_PROG(ACLOCAL, aclocal, $missing_dir)
AM_MISSING_PROG(AUTOCONF, autoconf, $missing_dir)
AM_MISSING_PROG(AUTOMAKE, automake, $missing_dir)
AM_MISSING_PROG(AUTOHEADER, autoheader, $missing_dir)
# AM_MISSING_PROG(MAKEINFO, makeinfo, $missing_dir)
AC_PROG_CC
AC_PROG_CPP
AM_PROG_CC_C_O
AM_PROG_AS
AC_ISC_POSIX
AC_PROG_INSTALL
AC_PROG_AWK

AC_GNU_SOURCE

# We need to compile and run a program on the build machine.  A
# comment in libgpg-error says that the AC_PROG_CC_FOR_BUILD macro in
# the AC archive is broken for autoconf 2.57.  Given that there is no
# newer version of that macro, we assume that it is also broken for
# autoconf 2.61 and thus we use a simple but usually sufficient
# approach.
AC_MSG_CHECKING(for cc for build)
if test "$cross_compiling" = "yes"; then
  CC_FOR_BUILD="${CC_FOR_BUILD-cc}"
else
  CC_FOR_BUILD="${CC_FOR_BUILD-$CC}"
fi
AC_MSG_RESULT($CC_FOR_BUILD)
AC_ARG_VAR(CC_FOR_BUILD,[build system C compiler])


LT_PREREQ([2.2.6])
LT_INIT([win32-dll disable-static])
LT_LANG([Windows Resource])


##########################
## General definitions. ##
##########################

# Used by libgcrypt-config
LIBGCRYPT_CONFIG_LIBS="-lgcrypt"
LIBGCRYPT_CONFIG_CFLAGS=""
LIBGCRYPT_CONFIG_HOST="$host"

# Definitions for symmetric ciphers.
available_ciphers="arcfour blowfish cast5 des aes twofish serpent rfc2268 seed"
available_ciphers="$available_ciphers camellia idea salsa20 gost28147 chacha20"
enabled_ciphers=""

# Definitions for public-key ciphers.
available_pubkey_ciphers="dsa elgamal rsa ecc"
enabled_pubkey_ciphers=""

# Definitions for message digests.
available_digests="crc gostr3411-94 md2 md4 md5 rmd160 sha1 sha256 sha512"
available_digests="$available_digests sha3 tiger whirlpool stribog blake2"
enabled_digests=""

# Definitions for kdfs (optional ones)
available_kdfs="s2k pkdf2 scrypt"
enabled_kdfs=""

# Definitions for random modules.
available_random_modules="linux egd unix"
auto_random_modules="$available_random_modules"

# Supported thread backends.
LIBGCRYPT_THREAD_MODULES=""

# Other definitions.
have_w32_system=no
have_w32ce_system=no
have_pthread=no


# Setup some stuff depending on host.
case "${host}" in
    *-*-mingw32*)
      ac_cv_have_dev_random=no
      have_w32_system=yes
      case "${host}" in
        *-mingw32ce*)
            have_w32ce_system=yes
            available_random_modules="w32ce"
            ;;
        *)
            available_random_modules="w32"
            ;;
      esac
      AC_DEFINE(USE_ONLY_8DOT3,1,
                [set this to limit filenames to the 8.3 format])
      AC_DEFINE(HAVE_DRIVE_LETTERS,1,
                [defined if we must run on a stupid file system])
      AC_DEFINE(HAVE_DOSISH_SYSTEM,1,
                [defined if we run on some of the PCDOS like systems
                 (DOS, Windoze. OS/2) with special properties like
                  no file modes])
      ;;

    i?86-emx-os2 | i?86-*-os2*emx)
        # OS/2 with the EMX environment
        ac_cv_have_dev_random=no
        AC_DEFINE(HAVE_DRIVE_LETTERS)
        AC_DEFINE(HAVE_DOSISH_SYSTEM)
        ;;

    i?86-*-msdosdjgpp*)
        # DOS with the DJGPP environment
        ac_cv_have_dev_random=no
        AC_DEFINE(HAVE_DRIVE_LETTERS)
        AC_DEFINE(HAVE_DOSISH_SYSTEM)
        ;;

    *-*-hpux*)
        if test -z "$GCC" ; then
            CFLAGS="$CFLAGS -Ae -D_HPUX_SOURCE"
        fi
        ;;
    *-dec-osf4*)
        if test -z "$GCC" ; then
            # Suppress all warnings
            # to get rid of the unsigned/signed char mismatch warnings.
            CFLAGS="$CFLAGS -w"
        fi
        ;;
    m68k-atari-mint)
        ;;
    *-apple-darwin*)
        AC_DEFINE(_DARWIN_C_SOURCE, 900000L,
                  Expose all libc features (__DARWIN_C_FULL).)
        ;;
    *)
      ;;
esac

if test "$have_w32_system" = yes; then
   AC_DEFINE(HAVE_W32_SYSTEM,1, [Defined if we run on a W32 API based system])
   if test "$have_w32ce_system" = yes; then
     AC_DEFINE(HAVE_W32CE_SYSTEM,1,[Defined if we run on WindowsCE])
   fi
fi
AM_CONDITIONAL(HAVE_W32_SYSTEM, test "$have_w32_system" = yes)
AM_CONDITIONAL(HAVE_W32CE_SYSTEM, test "$have_w32ce_system" = yes)



# A printable OS Name is sometimes useful.
case "${host}" in
    *-*-mingw32ce*)
        PRINTABLE_OS_NAME="W32CE"
        ;;

    *-*-mingw32*)
        PRINTABLE_OS_NAME="W32"
        ;;

    i?86-emx-os2 | i?86-*-os2*emx )
        PRINTABLE_OS_NAME="OS/2"
        ;;

    i?86-*-msdosdjgpp*)
        PRINTABLE_OS_NAME="MSDOS/DJGPP"
        ;;

    *-linux*)
        PRINTABLE_OS_NAME="GNU/Linux"
        ;;

    *)
        PRINTABLE_OS_NAME=`uname -s || echo "Unknown"`
        ;;
esac

NAME_OF_DEV_RANDOM="/dev/random"
NAME_OF_DEV_URANDOM="/dev/urandom"

AC_ARG_ENABLE(endian-check,
              AC_HELP_STRING([--disable-endian-check],
	      [disable the endian check and trust the OS provided macros]),
	      endiancheck=$enableval,endiancheck=yes)
if test x"$endiancheck" = xyes ; then
  AC_C_BIGENDIAN
else
  AC_DEFINE(DISABLED_ENDIAN_CHECK,1,[configure did not test for endianness])
fi

AC_CHECK_SIZEOF(unsigned short, 2)
AC_CHECK_SIZEOF(unsigned int, 4)
AC_CHECK_SIZEOF(unsigned long, 4)
AC_CHECK_SIZEOF(unsigned long long, 0)
AC_CHECK_SIZEOF(void *, 0)

AC_TYPE_UINTPTR_T

if test "$ac_cv_sizeof_unsigned_short" = "0" \
   || test "$ac_cv_sizeof_unsigned_int" = "0" \
   || test "$ac_cv_sizeof_unsigned_long" = "0"; then
    AC_MSG_WARN([Hmmm, something is wrong with the sizes - using defaults]);
fi

# Ensure that we have UINT64_C before we bother to check for uint64_t
AC_CACHE_CHECK([for UINT64_C],[gnupg_cv_uint64_c_works],
   AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <inttypes.h>]],
       [[uint64_t foo=UINT64_C(42);]])],
     gnupg_cv_uint64_c_works=yes,gnupg_cv_uint64_c_works=no))
if test "$gnupg_cv_uint64_c_works" = "yes" ; then
   AC_CHECK_SIZEOF(uint64_t)
fi

# Do we have any 64-bit data types?
if test "$ac_cv_sizeof_unsigned_int" != "8" \
   && test "$ac_cv_sizeof_unsigned_long" != "8" \
   && test "$ac_cv_sizeof_unsigned_long_long" != "8" \
   && test "$ac_cv_sizeof_uint64_t" != "8"; then
    AC_MSG_ERROR([[
***
*** No 64-bit integer type available.
*** It is not possible to build Libgcrypt on this platform.
***]])
fi


# If not specified otherwise, all available algorithms will be
# included.
default_ciphers="$available_ciphers"
default_pubkey_ciphers="$available_pubkey_ciphers"
default_digests="$available_digests"
default_kdfs="$available_kdfs"
# Blacklist MD2 by default
default_digests=`echo $default_digests | sed -e 's/md2//g'`

# Substitutions to set generated files in a Emacs buffer to read-only.
AC_SUBST(emacs_local_vars_begin, ['Local Variables:'])
AC_SUBST(emacs_local_vars_read_only, ['buffer-read-only: t'])
AC_SUBST(emacs_local_vars_end, ['End:'])

############################
## Command line switches. ##
############################

# Implementation of the --enable-ciphers switch.
AC_ARG_ENABLE(ciphers,
	      AC_HELP_STRING([--enable-ciphers=ciphers],
			     [select the symmetric ciphers to include]),
	      [enabled_ciphers=`echo $enableval | tr ',:' '  ' | tr '[A-Z]' '[a-z]'`],
	      [enabled_ciphers=""])
if test "x$enabled_ciphers" = "x" \
   -o "$enabled_ciphers" = "yes"  \
   -o "$enabled_ciphers" = "no"; then
   enabled_ciphers=$default_ciphers
fi
AC_MSG_CHECKING([which symmetric ciphers to include])
for cipher in $enabled_ciphers; do
    LIST_MEMBER($cipher, $available_ciphers)
    if test "$found" = "0"; then
       AC_MSG_ERROR([unsupported cipher "$cipher" specified])
    fi
done
AC_MSG_RESULT([$enabled_ciphers])

# Implementation of the --enable-pubkey-ciphers switch.
AC_ARG_ENABLE(pubkey-ciphers,
	      AC_HELP_STRING([--enable-pubkey-ciphers=ciphers],
			     [select the public-key ciphers to include]),
	      [enabled_pubkey_ciphers=`echo $enableval | tr ',:' '  ' | tr '[A-Z]' '[a-z]'`],
	      [enabled_pubkey_ciphers=""])
if test "x$enabled_pubkey_ciphers" = "x" \
   -o "$enabled_pubkey_ciphers" = "yes"  \
   -o "$enabled_pubkey_ciphers" = "no"; then
   enabled_pubkey_ciphers=$default_pubkey_ciphers
fi
AC_MSG_CHECKING([which public-key ciphers to include])
for cipher in $enabled_pubkey_ciphers; do
    LIST_MEMBER($cipher, $available_pubkey_ciphers)
    if test "$found" = "0"; then
       AC_MSG_ERROR([unsupported public-key cipher specified])
    fi
done
AC_MSG_RESULT([$enabled_pubkey_ciphers])

# Implementation of the --enable-digests switch.
AC_ARG_ENABLE(digests,
	      AC_HELP_STRING([--enable-digests=digests],
			     [select the message digests to include]),
	      [enabled_digests=`echo $enableval | tr ',:' '  ' | tr '[A-Z]' '[a-z]'`],
	      [enabled_digests=""])
if test "x$enabled_digests" = "x" \
   -o "$enabled_digests" = "yes"  \
   -o "$enabled_digests" = "no"; then
   enabled_digests=$default_digests
fi
AC_MSG_CHECKING([which message digests to include])
for digest in $enabled_digests; do
    LIST_MEMBER($digest, $available_digests)
    if test "$found" = "0"; then
       AC_MSG_ERROR([unsupported message digest specified])
    fi
done
AC_MSG_RESULT([$enabled_digests])

# Implementation of the --enable-kdfs switch.
AC_ARG_ENABLE(kdfs,
      AC_HELP_STRING([--enable-kfds=kdfs],
		     [select the KDFs to include]),
      [enabled_kdfs=`echo $enableval | tr ',:' '  ' | tr '[A-Z]' '[a-z]'`],
      [enabled_kdfs=""])
if test "x$enabled_kdfs" = "x" \
   -o "$enabled_kdfs" = "yes"  \
   -o "$enabled_kdfs" = "no"; then
   enabled_kdfs=$default_kdfs
fi
AC_MSG_CHECKING([which key derivation functions to include])
for kdf in $enabled_kdfs; do
    LIST_MEMBER($kdf, $available_kdfs)
    if test "$found" = "0"; then
       AC_MSG_ERROR([unsupported key derivation function specified])
    fi
done
AC_MSG_RESULT([$enabled_kdfs])

# Implementation of the --enable-random switch.
AC_ARG_ENABLE(random,
	      AC_HELP_STRING([--enable-random=name],
	                     [select which random number generator to use]),
	      [random=`echo $enableval | tr '[A-Z]' '[a-z]'`],
	      [])
if test "x$random" = "x" -o "$random" = "yes" -o "$random" = "no"; then
    random=default
fi
AC_MSG_CHECKING([which random module to use])
if test "$random" != "default" -a "$random" != "auto"; then
    LIST_MEMBER($random, $available_random_modules)
    if test "$found" = "0"; then
       AC_MSG_ERROR([unsupported random module specified])
    fi
fi
AC_MSG_RESULT($random)

# Implementation of the --disable-dev-random switch.
AC_MSG_CHECKING([whether use of /dev/random is requested])
AC_ARG_ENABLE(dev-random,
[  --disable-dev-random    disable the use of dev random],
    try_dev_random=$enableval, try_dev_random=yes)
AC_MSG_RESULT($try_dev_random)

# Implementation of the --with-egd-socket switch.
AC_ARG_WITH(egd-socket,
    [  --with-egd-socket=NAME  Use NAME for the EGD socket)],
            egd_socket_name="$withval", egd_socket_name="" )
AC_DEFINE_UNQUOTED(EGD_SOCKET_NAME, "$egd_socket_name",
                   [Define if you don't want the default EGD socket name.
                    For details see cipher/rndegd.c])

# Implementation of the --enable-random-daemon
AC_MSG_CHECKING([whether the experimental random daemon is requested])
AC_ARG_ENABLE([random-daemon],
              AC_HELP_STRING([--enable-random-daemon],
                             [Build and support the experimental gcryptrnd]),
              [use_random_daemon=$enableval],
              [use_random_daemon=no])
AC_MSG_RESULT($use_random_daemon)
if test x$use_random_daemon = xyes ; then
    AC_DEFINE(USE_RANDOM_DAEMON,1,
              [Define to support the experimental random daemon])
fi
AM_CONDITIONAL(USE_RANDOM_DAEMON, test x$use_random_daemon = xyes)


# Implementation of --disable-asm.
AC_MSG_CHECKING([whether MPI assembler modules are requested])
AC_ARG_ENABLE([asm],
              AC_HELP_STRING([--disable-asm],
	                     [Disable MPI assembler modules]),
              [try_asm_modules=$enableval],
              [try_asm_modules=yes])
AC_MSG_RESULT($try_asm_modules)

# Implementation of the --enable-m-guard switch.
AC_MSG_CHECKING([whether memory guard is requested])
AC_ARG_ENABLE(m-guard,
              AC_HELP_STRING([--enable-m-guard],
                             [Enable memory guard facility]),
              [use_m_guard=$enableval], [use_m_guard=no])
AC_MSG_RESULT($use_m_guard)
if test "$use_m_guard" = yes ; then
    AC_DEFINE(M_GUARD,1,[Define to use the (obsolete) malloc guarding feature])
fi

# Implementation of the --enable-large-data-tests switch.
AC_MSG_CHECKING([whether to run large data tests])
AC_ARG_ENABLE(large-data-tests,
              AC_HELP_STRING([--enable-large-data-tests],
                 [Enable the real long ruinning large data tests]),
	      large_data_tests=$enableval,large_data_tests=no)
AC_MSG_RESULT($large_data_tests)
AC_SUBST(RUN_LARGE_DATA_TESTS, $large_data_tests)


# Implementation of the --with-capabilities switch.
# Check whether we want to use Linux capabilities
AC_MSG_CHECKING([whether use of capabilities is requested])
AC_ARG_WITH(capabilities,
            AC_HELP_STRING([--with-capabilities],
                           [Use linux capabilities [default=no]]),
            [use_capabilities="$withval"],[use_capabilities=no])
AC_MSG_RESULT($use_capabilities)

# Implementation of the --enable-hmac-binary-check.
AC_MSG_CHECKING([whether a HMAC binary check is requested])
AC_ARG_ENABLE(hmac-binary-check,
              AC_HELP_STRING([--enable-hmac-binary-check],
                             [Enable library integrity check]),
              [use_hmac_binary_check=$enableval],
              [use_hmac_binary_check=no])
AC_MSG_RESULT($use_hmac_binary_check)
if test "$use_hmac_binary_check" = yes ; then
    AC_DEFINE(ENABLE_HMAC_BINARY_CHECK,1,
              [Define to support an HMAC based integrity check])
fi


# Implementation of the --disable-jent-support switch.
AC_MSG_CHECKING([whether jitter entropy support is requested])
AC_ARG_ENABLE(jent-support,
              AC_HELP_STRING([--disable-jent-support],
                        [Disable support for the Jitter entropy collector]),
	      jentsupport=$enableval,jentsupport=yes)
AC_MSG_RESULT($jentsupport)

# Implementation of the --disable-padlock-support switch.
AC_MSG_CHECKING([whether padlock support is requested])
AC_ARG_ENABLE(padlock-support,
              AC_HELP_STRING([--disable-padlock-support],
       	         [Disable support for the PadLock Engine of VIA processors]),
	      padlocksupport=$enableval,padlocksupport=yes)
AC_MSG_RESULT($padlocksupport)

# Implementation of the --disable-aesni-support switch.
AC_MSG_CHECKING([whether AESNI support is requested])
AC_ARG_ENABLE(aesni-support,
              AC_HELP_STRING([--disable-aesni-support],
                 [Disable support for the Intel AES-NI instructions]),
	      aesnisupport=$enableval,aesnisupport=yes)
AC_MSG_RESULT($aesnisupport)

# Implementation of the --disable-pclmul-support switch.
AC_MSG_CHECKING([whether PCLMUL support is requested])
AC_ARG_ENABLE(pclmul-support,
              AC_HELP_STRING([--disable-pclmul-support],
                 [Disable support for the Intel PCLMUL instructions]),
	      pclmulsupport=$enableval,pclmulsupport=yes)
AC_MSG_RESULT($pclmulsupport)

# Implementation of the --disable-sse41-support switch.
AC_MSG_CHECKING([whether SSE4.1 support is requested])
AC_ARG_ENABLE(sse41-support,
              AC_HELP_STRING([--disable-sse41-support],
                 [Disable support for the Intel SSE4.1 instructions]),
	      sse41support=$enableval,sse41support=yes)
AC_MSG_RESULT($sse41support)

# Implementation of the --disable-drng-support switch.
AC_MSG_CHECKING([whether DRNG support is requested])
AC_ARG_ENABLE(drng-support,
              AC_HELP_STRING([--disable-drng-support],
                 [Disable support for the Intel DRNG (RDRAND instruction)]),
	      drngsupport=$enableval,drngsupport=yes)
AC_MSG_RESULT($drngsupport)

# Implementation of the --disable-avx-support switch.
AC_MSG_CHECKING([whether AVX support is requested])
AC_ARG_ENABLE(avx-support,
              AC_HELP_STRING([--disable-avx-support],
                 [Disable support for the Intel AVX instructions]),
	      avxsupport=$enableval,avxsupport=yes)
AC_MSG_RESULT($avxsupport)

# Implementation of the --disable-avx2-support switch.
AC_MSG_CHECKING([whether AVX2 support is requested])
AC_ARG_ENABLE(avx2-support,
              AC_HELP_STRING([--disable-avx2-support],
                 [Disable support for the Intel AVX2 instructions]),
	      avx2support=$enableval,avx2support=yes)
AC_MSG_RESULT($avx2support)

# Implementation of the --disable-neon-support switch.
AC_MSG_CHECKING([whether NEON support is requested])
AC_ARG_ENABLE(neon-support,
              AC_HELP_STRING([--disable-neon-support],
                 [Disable support for the ARM NEON instructions]),
	      neonsupport=$enableval,neonsupport=yes)
AC_MSG_RESULT($neonsupport)

# Implementation of the --disable-arm-crypto-support switch.
AC_MSG_CHECKING([whether ARMv8 Crypto Extension support is requested])
AC_ARG_ENABLE(arm-crypto-support,
              AC_HELP_STRING([--disable-arm-crypto-support],
                 [Disable support for the ARMv8 Crypto Extension instructions]),
	      armcryptosupport=$enableval,armcryptosupport=yes)
AC_MSG_RESULT($armcryptosupport)

# Implementation of the --disable-O-flag-munging switch.
AC_MSG_CHECKING([whether a -O flag munging is requested])
AC_ARG_ENABLE([O-flag-munging],
              AC_HELP_STRING([--disable-O-flag-munging],
                 [Disable modification of the cc -O flag]),
              [enable_o_flag_munging=$enableval],
              [enable_o_flag_munging=yes])
AC_MSG_RESULT($enable_o_flag_munging)
AM_CONDITIONAL(ENABLE_O_FLAG_MUNGING, test "$enable_o_flag_munging" = "yes")

# Implementation of the --disable-amd64-as-feature-detection switch.
AC_MSG_CHECKING([whether to enable AMD64 as(1) feature detection])
AC_ARG_ENABLE(amd64-as-feature-detection,
              AC_HELP_STRING([--disable-amd64-as-feature-detection],
                 [Disable the auto-detection of AMD64 as(1) features]),
	      amd64_as_feature_detection=$enableval,
              amd64_as_feature_detection=yes)
AC_MSG_RESULT($amd64_as_feature_detection)


AC_DEFINE_UNQUOTED(PRINTABLE_OS_NAME, "$PRINTABLE_OS_NAME",
                   [A human readable text with the name of the OS])

# For some systems we know that we have ld_version scripts.
# Use it then as default.
have_ld_version_script=no
case "${host}" in
    *-*-linux*)
	have_ld_version_script=yes
        ;;
    *-*-gnu*)
	have_ld_version_script=yes
        ;;
esac
AC_ARG_ENABLE([ld-version-script],
              AC_HELP_STRING([--enable-ld-version-script],
                             [enable/disable use of linker version script.
                              (default is system dependent)]),
              [have_ld_version_script=$enableval],
              [ : ] )
AM_CONDITIONAL(HAVE_LD_VERSION_SCRIPT, test "$have_ld_version_script" = "yes")

AC_DEFINE_UNQUOTED(NAME_OF_DEV_RANDOM, "$NAME_OF_DEV_RANDOM",
                   [defined to the name of the strong random device])
AC_DEFINE_UNQUOTED(NAME_OF_DEV_URANDOM, "$NAME_OF_DEV_URANDOM",
                   [defined to the name of the weaker random device])


###############################
#### Checks for libraries. ####
###############################

#
# gpg-error is required.
#
AM_PATH_GPG_ERROR("$NEED_GPG_ERROR_VERSION")
if test "x$GPG_ERROR_LIBS" = "x"; then
  AC_MSG_ERROR([libgpg-error is needed.
                See ftp://ftp.gnupg.org/gcrypt/libgpg-error/ .])
fi

AC_DEFINE(GPG_ERR_SOURCE_DEFAULT, GPG_ERR_SOURCE_GCRYPT,
          [The default error source for libgcrypt.])

#
# Check whether the GNU Pth library is available.  We require this
# to build the optional gcryptrnd program.
#
AC_ARG_WITH(pth-prefix,
            AC_HELP_STRING([--with-pth-prefix=PFX],
                           [prefix where GNU Pth is installed (optional)]),
     pth_config_prefix="$withval", pth_config_prefix="")
if test x$pth_config_prefix != x ; then
   PTH_CONFIG="$pth_config_prefix/bin/pth-config"
fi
if test "$use_random_daemon" = "yes"; then
  AC_PATH_PROG(PTH_CONFIG, pth-config, no)
  if test "$PTH_CONFIG" = "no"; then
    AC_MSG_WARN([[
***
*** To build the Libgcrypt's random number daemon
*** we need the support of the GNU Portable Threads Library.
*** Download it from ftp://ftp.gnu.org/gnu/pth/
*** On a Debian GNU/Linux system you might want to try
***   apt-get install libpth-dev
***]])
  else
    GNUPG_PTH_VERSION_CHECK([1.3.7])
    if test $have_pth = yes; then
       PTH_CFLAGS=`$PTH_CONFIG --cflags`
       PTH_LIBS=`$PTH_CONFIG --ldflags`
       PTH_LIBS="$PTH_LIBS `$PTH_CONFIG --libs --all`"
       AC_DEFINE(USE_GNU_PTH, 1,
                [Defined if the GNU Portable Thread Library should be used])
       AC_DEFINE(HAVE_PTH, 1,
                [Defined if the GNU Pth is available])
    fi
  fi
fi
AC_SUBST(PTH_CFLAGS)
AC_SUBST(PTH_LIBS)

#
# Check whether pthreads is available
#
if test "$have_w32_system" != yes; then
  AC_CHECK_LIB(pthread,pthread_create,have_pthread=yes)
  if test "$have_pthread" = yes; then
    AC_DEFINE(HAVE_PTHREAD, 1 ,[Define if we have pthread.])
  fi
fi


# Solaris needs -lsocket and -lnsl. Unisys system includes
# gethostbyname in libsocket but needs libnsl for socket.
AC_SEARCH_LIBS(setsockopt, [socket], ,
	[AC_SEARCH_LIBS(setsockopt, [socket], , , [-lnsl])])
AC_SEARCH_LIBS(setsockopt, [nsl])

##################################
#### Checks for header files. ####
##################################

AC_HEADER_STDC
AC_CHECK_HEADERS(unistd.h sys/select.h sys/msg.h)
INSERT_SYS_SELECT_H=
if test x"$ac_cv_header_sys_select_h" = xyes; then
  INSERT_SYS_SELECT_H=" include <sys/select.h>"
fi
AC_SUBST(INSERT_SYS_SELECT_H)


##########################################
#### Checks for typedefs, structures, ####
####  and compiler characteristics.   ####
##########################################

AC_C_CONST
AC_C_INLINE
AC_TYPE_SIZE_T
AC_TYPE_SIGNAL
AC_DECL_SYS_SIGLIST
AC_TYPE_PID_T

GNUPG_CHECK_TYPEDEF(byte, HAVE_BYTE_TYPEDEF)
GNUPG_CHECK_TYPEDEF(ushort, HAVE_USHORT_TYPEDEF)
GNUPG_CHECK_TYPEDEF(ulong, HAVE_ULONG_TYPEDEF)
GNUPG_CHECK_TYPEDEF(u16, HAVE_U16_TYPEDEF)
GNUPG_CHECK_TYPEDEF(u32, HAVE_U32_TYPEDEF)

gl_TYPE_SOCKLEN_T
case "${host}" in
  *-*-mingw32*)
    # socklen_t may or may not be defined depending on what headers
    # are included.  To be safe we use int as this is the actual type.
    FALLBACK_SOCKLEN_T="typedef int gcry_socklen_t;"
    ;;
  *)
    if test ".$gl_cv_socklen_t_equiv" = "."; then
      FALLBACK_SOCKLEN_T="typedef socklen_t gcry_socklen_t;"
    else
      FALLBACK_SOCKLEN_T="typedef ${gl_cv_socklen_t_equiv} gcry_socklen_t;"
    fi
esac
AC_SUBST(FALLBACK_SOCKLEN_T)


#
# Check for __builtin_bswap32 intrinsic.
#
AC_CACHE_CHECK(for __builtin_bswap32,
       [gcry_cv_have_builtin_bswap32],
       [gcry_cv_have_builtin_bswap32=no
        AC_LINK_IFELSE([AC_LANG_PROGRAM([],
          [int x = 0; int y = __builtin_bswap32(x); return y;])],
          [gcry_cv_have_builtin_bswap32=yes])])
if test "$gcry_cv_have_builtin_bswap32" = "yes" ; then
   AC_DEFINE(HAVE_BUILTIN_BSWAP32,1,
             [Defined if compiler has '__builtin_bswap32' intrinsic])
fi


#
# Check for __builtin_bswap64 intrinsic.
#
AC_CACHE_CHECK(for __builtin_bswap64,
       [gcry_cv_have_builtin_bswap64],
       [gcry_cv_have_builtin_bswap64=no
        AC_LINK_IFELSE([AC_LANG_PROGRAM([],
          [long long x = 0; long long y = __builtin_bswap64(x); return y;])],
          [gcry_cv_have_builtin_bswap64=yes])])
if test "$gcry_cv_have_builtin_bswap64" = "yes" ; then
   AC_DEFINE(HAVE_BUILTIN_BSWAP64,1,
             [Defined if compiler has '__builtin_bswap64' intrinsic])
fi


#
# Check for __builtin_ctz intrinsic.
#
AC_CACHE_CHECK(for __builtin_ctz,
       [gcry_cv_have_builtin_ctz],
       [gcry_cv_have_builtin_ctz=no
        AC_LINK_IFELSE([AC_LANG_PROGRAM([],
          [unsigned int x = 0; int y = __builtin_ctz(x); return y;])],
          [gcry_cv_have_builtin_ctz=yes])])
if test "$gcry_cv_have_builtin_ctz" = "yes" ; then
   AC_DEFINE(HAVE_BUILTIN_CTZ, 1,
             [Defined if compiler has '__builtin_ctz' intrinsic])
fi


#
# Check for VLA support (variable length arrays).
#
AC_CACHE_CHECK(whether the variable length arrays are supported,
       [gcry_cv_have_vla],
       [gcry_cv_have_vla=no
        AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[void f1(char *, int);
            char foo(int i) {
              char b[(i < 0 ? 0 : i) + 1];
              f1(b, sizeof b); return b[0];}]])],
          [gcry_cv_have_vla=yes])])
if test "$gcry_cv_have_vla" = "yes" ; then
   AC_DEFINE(HAVE_VLA,1, [Defined if variable length arrays are supported])
fi


#
# Check for ELF visibility support.
#
AC_CACHE_CHECK(whether the visibility attribute is supported,
       gcry_cv_visibility_attribute,
       [gcry_cv_visibility_attribute=no
        AC_LANG_CONFTEST([AC_LANG_SOURCE(
          [[int foo __attribute__ ((visibility ("hidden"))) = 1;
            int bar __attribute__ ((visibility ("protected"))) = 1;
          ]])])

        if ${CC-cc} -Werror -S conftest.c -o conftest.s \
                  1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD ; then
            if grep '\.hidden.*foo' conftest.s >/dev/null 2>&1 ; then
                if grep '\.protected.*bar' conftest.s >/dev/null 2>&1; then
                    gcry_cv_visibility_attribute=yes
                fi
            fi
        fi
       ])
if test "$gcry_cv_visibility_attribute" = "yes"; then
    AC_CACHE_CHECK(for broken visibility attribute,
       gcry_cv_broken_visibility_attribute,
       [gcry_cv_broken_visibility_attribute=yes
        AC_LANG_CONFTEST([AC_LANG_SOURCE(
          [[int foo (int x);
            int bar (int x) __asm__ ("foo")
                            __attribute__ ((visibility ("hidden")));
            int bar (int x) { return x; }
          ]])])

        if ${CC-cc} -Werror -S conftest.c -o conftest.s \
                  1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD ; then
           if grep '\.hidden@<:@ 	_@:>@foo' conftest.s >/dev/null 2>&1;
            then
               gcry_cv_broken_visibility_attribute=no
           fi
        fi
       ])
fi
if test "$gcry_cv_visibility_attribute" = "yes"; then
    AC_CACHE_CHECK(for broken alias attribute,
       gcry_cv_broken_alias_attribute,
       [gcry_cv_broken_alias_attribute=yes
        AC_LANG_CONFTEST([AC_LANG_SOURCE(
          [[extern int foo (int x) __asm ("xyzzy");
            int bar (int x) { return x; }
            extern __typeof (bar) foo __attribute ((weak, alias ("bar")));
            extern int dfoo;
            extern __typeof (dfoo) dfoo __asm ("abccb");
            int dfoo = 1;
          ]])])

        if ${CC-cc} -Werror -S conftest.c -o conftest.s \
                  1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD ; then
           if grep 'xyzzy' conftest.s >/dev/null 2>&1 && \
              grep 'abccb' conftest.s >/dev/null 2>&1; then
              gcry_cv_broken_alias_attribute=no
           fi
        fi
        ])
fi
if test "$gcry_cv_visibility_attribute" = "yes"; then
    AC_CACHE_CHECK(if gcc supports -fvisibility=hidden,
       gcry_cv_gcc_has_f_visibility,
       [gcry_cv_gcc_has_f_visibility=no
        _gcc_cflags_save=$CFLAGS
        CFLAGS="-fvisibility=hidden"
        AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],
                          gcry_cv_gcc_has_f_visibility=yes)
        CFLAGS=$_gcc_cflags_save;
       ])
fi
if test "$gcry_cv_visibility_attribute" = "yes" \
   && test "$gcry_cv_broken_visibility_attribute" != "yes" \
   && test "$gcry_cv_broken_alias_attribute" != "yes" \
   && test "$gcry_cv_gcc_has_f_visibility" = "yes"
 then
   AC_DEFINE(GCRY_USE_VISIBILITY, 1,
               [Define to use the GNU C visibility attribute.])
   CFLAGS="$CFLAGS -fvisibility=hidden"
fi


# Following attribute tests depend on warnings to cause compile to fail,
# so set -Werror temporarily.
_gcc_cflags_save=$CFLAGS
CFLAGS="$CFLAGS -Werror"


#
# Check whether the compiler supports the GCC style aligned attribute
#
AC_CACHE_CHECK([whether the GCC style aligned attribute is supported],
       [gcry_cv_gcc_attribute_aligned],
       [gcry_cv_gcc_attribute_aligned=no
        AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[struct { int a; } foo __attribute__ ((aligned (16)));]])],
          [gcry_cv_gcc_attribute_aligned=yes])])
if test "$gcry_cv_gcc_attribute_aligned" = "yes" ; then
   AC_DEFINE(HAVE_GCC_ATTRIBUTE_ALIGNED,1,
     [Defined if a GCC style "__attribute__ ((aligned (n))" is supported])
fi


#
# Check whether the compiler supports the GCC style packed attribute
#
AC_CACHE_CHECK([whether the GCC style packed attribute is supported],
       [gcry_cv_gcc_attribute_packed],
       [gcry_cv_gcc_attribute_packed=no
        AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[struct foolong_s { long b; } __attribute__ ((packed));
            struct foo_s { char a; struct foolong_s b; }
              __attribute__ ((packed));
            enum bar {
              FOO = 1 / (sizeof(struct foo_s) == (sizeof(char) + sizeof(long))),
            };]])],
          [gcry_cv_gcc_attribute_packed=yes])])
if test "$gcry_cv_gcc_attribute_packed" = "yes" ; then
   AC_DEFINE(HAVE_GCC_ATTRIBUTE_PACKED,1,
     [Defined if a GCC style "__attribute__ ((packed))" is supported])
fi


#
# Check whether the compiler supports the GCC style may_alias attribute
#
AC_CACHE_CHECK([whether the GCC style may_alias attribute is supported],
       [gcry_cv_gcc_attribute_may_alias],
       [gcry_cv_gcc_attribute_may_alias=no
        AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[typedef struct foo_s { int a; }
            __attribute__ ((may_alias)) foo_t;]])],
          [gcry_cv_gcc_attribute_may_alias=yes])])
if test "$gcry_cv_gcc_attribute_may_alias" = "yes" ; then
   AC_DEFINE(HAVE_GCC_ATTRIBUTE_MAY_ALIAS,1,
     [Defined if a GCC style "__attribute__ ((may_alias))" is supported])
fi


# Restore flags.
CFLAGS=$_gcc_cflags_save;


#
# Check whether the compiler supports 'asm' or '__asm__' keyword for
# assembler blocks.
#
AC_CACHE_CHECK([whether 'asm' assembler keyword is supported],
       [gcry_cv_have_asm],
       [gcry_cv_have_asm=no
        AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[void a(void) { asm("":::"memory"); }]])],
          [gcry_cv_have_asm=yes])])
AC_CACHE_CHECK([whether '__asm__' assembler keyword is supported],
       [gcry_cv_have___asm__],
       [gcry_cv_have___asm__=no
        AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[void a(void) { __asm__("":::"memory"); }]])],
          [gcry_cv_have___asm__=yes])])
if test "$gcry_cv_have_asm" = "no" ; then
   if test "$gcry_cv_have___asm__" = "yes" ; then
      AC_DEFINE(asm,__asm__,
        [Define to supported assembler block keyword, if plain 'asm' was not
         supported])
   fi
fi


#
# Check whether the compiler supports inline assembly memory barrier.
#
if test "$gcry_cv_have_asm" = "no" ; then
   if test "$gcry_cv_have___asm__" = "yes" ; then
      AC_CACHE_CHECK([whether inline assembly memory barrier is supported],
          [gcry_cv_have_asm_volatile_memory],
          [gcry_cv_have_asm_volatile_memory=no
           AC_COMPILE_IFELSE([AC_LANG_SOURCE(
             [[void a(void) { __asm__ volatile("":::"memory"); }]])],
             [gcry_cv_have_asm_volatile_memory=yes])])
   fi
else
   AC_CACHE_CHECK([whether inline assembly memory barrier is supported],
       [gcry_cv_have_asm_volatile_memory],
       [gcry_cv_have_asm_volatile_memory=no
        AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[void a(void) { asm volatile("":::"memory"); }]])],
          [gcry_cv_have_asm_volatile_memory=yes])])
fi
if test "$gcry_cv_have_asm_volatile_memory" = "yes" ; then
   AC_DEFINE(HAVE_GCC_ASM_VOLATILE_MEMORY,1,
     [Define if inline asm memory barrier is supported])
fi


#
# Check whether GCC assembler supports features needed for our ARM
# implementations.  This needs to be done before setting up the
# assembler stuff.
#
AC_CACHE_CHECK([whether GCC assembler is compatible for ARM assembly implementations],
       [gcry_cv_gcc_arm_platform_as_ok],
       [gcry_cv_gcc_arm_platform_as_ok=no
        AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[__asm__(
                /* Test if assembler supports UAL syntax.  */
                ".syntax unified\n\t"
                ".arm\n\t" /* our assembly code is in ARM mode  */
                /* Following causes error if assembler ignored '.syntax unified'.  */
                "asmfunc:\n\t"
                "add %r0, %r0, %r4, ror #12;\n\t"

                /* Test if '.type' and '.size' are supported.  */
                ".size asmfunc,.-asmfunc;\n\t"
                ".type asmfunc,%function;\n\t"
            );]])],
          [gcry_cv_gcc_arm_platform_as_ok=yes])])
if test "$gcry_cv_gcc_arm_platform_as_ok" = "yes" ; then
   AC_DEFINE(HAVE_COMPATIBLE_GCC_ARM_PLATFORM_AS,1,
     [Defined if underlying assembler is compatible with ARM assembly implementations])
fi


#
# Check whether GCC assembler supports features needed for our ARMv8/Aarch64
# implementations.  This needs to be done before setting up the
# assembler stuff.
#
AC_CACHE_CHECK([whether GCC assembler is compatible for ARMv8/Aarch64 assembly implementations],
       [gcry_cv_gcc_aarch64_platform_as_ok],
       [gcry_cv_gcc_aarch64_platform_as_ok=no
        AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[__asm__(
                "asmfunc:\n\t"
                "eor x0, x0, x30, ror #12;\n\t"
                "add x0, x0, x30, asr #12;\n\t"
                "eor v0.16b, v0.16b, v31.16b;\n\t"

                /* Test if '.type' and '.size' are supported.  */
                ".size asmfunc,.-asmfunc;\n\t"
                ".type asmfunc,@function;\n\t"
            );]])],
          [gcry_cv_gcc_aarch64_platform_as_ok=yes])])
if test "$gcry_cv_gcc_aarch64_platform_as_ok" = "yes" ; then
   AC_DEFINE(HAVE_COMPATIBLE_GCC_AARCH64_PLATFORM_AS,1,
     [Defined if underlying assembler is compatible with ARMv8/Aarch64 assembly implementations])
fi


#
# Check whether underscores in symbols are required.  This needs to be
# done before setting up the assembler stuff.
#
GNUPG_SYS_SYMBOL_UNDERSCORE()


#################################
####                         ####
#### Setup assembler stuff.  ####
#### Define mpi_cpu_arch.    ####
####                         ####
#################################
AC_ARG_ENABLE(mpi-path,
              AC_HELP_STRING([--enable-mpi-path=EXTRA_PATH],
	      [prepend EXTRA_PATH to list of CPU specific optimizations]),
	      mpi_extra_path="$enableval",mpi_extra_path="")
AC_MSG_CHECKING(architecture and mpi assembler functions)
if test -f $srcdir/mpi/config.links ; then
    . $srcdir/mpi/config.links
    AC_CONFIG_LINKS("$mpi_ln_list")
    ac_cv_mpi_sflags="$mpi_sflags"
    AC_MSG_RESULT($mpi_cpu_arch)
else
    AC_MSG_RESULT(failed)
    AC_MSG_ERROR([mpi/config.links missing!])
fi
MPI_SFLAGS="$ac_cv_mpi_sflags"
AC_SUBST(MPI_SFLAGS)

AM_CONDITIONAL(MPI_MOD_ASM_MPIH_ADD1, test "$mpi_mod_asm_mpih_add1" = yes)
AM_CONDITIONAL(MPI_MOD_ASM_MPIH_SUB1, test "$mpi_mod_asm_mpih_sub1" = yes)
AM_CONDITIONAL(MPI_MOD_ASM_MPIH_MUL1, test "$mpi_mod_asm_mpih_mul1" = yes)
AM_CONDITIONAL(MPI_MOD_ASM_MPIH_MUL2, test "$mpi_mod_asm_mpih_mul2" = yes)
AM_CONDITIONAL(MPI_MOD_ASM_MPIH_MUL3, test "$mpi_mod_asm_mpih_mul3" = yes)
AM_CONDITIONAL(MPI_MOD_ASM_MPIH_LSHIFT, test "$mpi_mod_asm_mpih_lshift" = yes)
AM_CONDITIONAL(MPI_MOD_ASM_MPIH_RSHIFT, test "$mpi_mod_asm_mpih_rshift" = yes)
AM_CONDITIONAL(MPI_MOD_ASM_UDIV, test "$mpi_mod_asm_udiv" = yes)
AM_CONDITIONAL(MPI_MOD_ASM_UDIV_QRNND, test "$mpi_mod_asm_udiv_qrnnd" = yes)
AM_CONDITIONAL(MPI_MOD_C_MPIH_ADD1, test "$mpi_mod_c_mpih_add1" = yes)
AM_CONDITIONAL(MPI_MOD_C_MPIH_SUB1, test "$mpi_mod_c_mpih_sub1" = yes)
AM_CONDITIONAL(MPI_MOD_C_MPIH_MUL1, test "$mpi_mod_c_mpih_mul1" = yes)
AM_CONDITIONAL(MPI_MOD_C_MPIH_MUL2, test "$mpi_mod_c_mpih_mul2" = yes)
AM_CONDITIONAL(MPI_MOD_C_MPIH_MUL3, test "$mpi_mod_c_mpih_mul3" = yes)
AM_CONDITIONAL(MPI_MOD_C_MPIH_LSHIFT, test "$mpi_mod_c_mpih_lshift" = yes)
AM_CONDITIONAL(MPI_MOD_C_MPIH_RSHIFT, test "$mpi_mod_c_mpih_rshift" = yes)
AM_CONDITIONAL(MPI_MOD_C_UDIV, test "$mpi_mod_c_udiv" = yes)
AM_CONDITIONAL(MPI_MOD_C_UDIV_QRNND, test "$mpi_mod_c_udiv_qrnnd" = yes)

# Reset non applicable feature flags.
if test "$mpi_cpu_arch" != "x86" ; then
   aesnisupport="n/a"
   pclmulsupport="n/a"
   sse41support="n/a"
   avxsupport="n/a"
   avx2support="n/a"
   padlocksupport="n/a"
   jentsupport="n/a"
   drngsupport="n/a"
fi

if test "$mpi_cpu_arch" != "arm" ; then
   if test "$mpi_cpu_arch" != "aarch64" ; then
     neonsupport="n/a"
     armcryptosupport="n/a"
   fi
fi


#############################################
####                                     ####
#### Platform specific compiler checks.  ####
####                                     ####
#############################################


# Following tests depend on warnings to cause compile to fail, so set -Werror
# temporarily.
_gcc_cflags_save=$CFLAGS
CFLAGS="$CFLAGS -Werror"


#
# Check whether compiler supports 'ms_abi' function attribute.
#
AC_CACHE_CHECK([whether compiler supports 'ms_abi' function attribute],
       [gcry_cv_gcc_attribute_ms_abi],
       [gcry_cv_gcc_attribute_ms_abi=no
        AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[int __attribute__ ((ms_abi)) proto(int);]])],
          [gcry_cv_gcc_attribute_ms_abi=yes])])
if test "$gcry_cv_gcc_attribute_ms_abi" = "yes" ; then
   AC_DEFINE(HAVE_GCC_ATTRIBUTE_MS_ABI,1,
     [Defined if compiler supports "__attribute__ ((ms_abi))" function attribute])
fi


#
# Check whether compiler supports 'sysv_abi' function attribute.
#
AC_CACHE_CHECK([whether compiler supports 'sysv_abi' function attribute],
       [gcry_cv_gcc_attribute_sysv_abi],
       [gcry_cv_gcc_attribute_sysv_abi=no
        AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[int __attribute__ ((sysv_abi)) proto(int);]])],
          [gcry_cv_gcc_attribute_sysv_abi=yes])])
if test "$gcry_cv_gcc_attribute_sysv_abi" = "yes" ; then
   AC_DEFINE(HAVE_GCC_ATTRIBUTE_SYSV_ABI,1,
     [Defined if compiler supports "__attribute__ ((sysv_abi))" function attribute])
fi


#
# Check whether default calling convention is 'ms_abi'.
#
if test "$gcry_cv_gcc_attribute_ms_abi" = "yes" ; then
   AC_CACHE_CHECK([whether default calling convention is 'ms_abi'],
          [gcry_cv_gcc_default_abi_is_ms_abi],
          [gcry_cv_gcc_default_abi_is_ms_abi=no
           AC_COMPILE_IFELSE([AC_LANG_SOURCE(
             [[void *test(void) {
                 void *(*def_func)(void) = test;
                 void *__attribute__((ms_abi))(*msabi_func)(void);
                 /* warning on SysV abi targets, passes on Windows based targets */
                 msabi_func = def_func;
                 return msabi_func;
             }]])],
             [gcry_cv_gcc_default_abi_is_ms_abi=yes])])
   if test "$gcry_cv_gcc_default_abi_is_ms_abi" = "yes" ; then
      AC_DEFINE(HAVE_GCC_DEFAULT_ABI_IS_MS_ABI,1,
        [Defined if default calling convention is 'ms_abi'])
   fi
fi


#
# Check whether default calling convention is 'sysv_abi'.
#
if test "$gcry_cv_gcc_attribute_sysv_abi" = "yes" ; then
   AC_CACHE_CHECK([whether default calling convention is 'sysv_abi'],
          [gcry_cv_gcc_default_abi_is_sysv_abi],
          [gcry_cv_gcc_default_abi_is_sysv_abi=no
           AC_COMPILE_IFELSE([AC_LANG_SOURCE(
             [[void *test(void) {
                 void *(*def_func)(void) = test;
                 void *__attribute__((sysv_abi))(*sysvabi_func)(void);
                 /* warning on MS ABI targets, passes on SysV ABI targets */
                 sysvabi_func = def_func;
                 return sysvabi_func;
             }]])],
             [gcry_cv_gcc_default_abi_is_sysv_abi=yes])])
   if test "$gcry_cv_gcc_default_abi_is_sysv_abi" = "yes" ; then
      AC_DEFINE(HAVE_GCC_DEFAULT_ABI_IS_SYSV_ABI,1,
        [Defined if default calling convention is 'sysv_abi'])
   fi
fi


# Restore flags.
CFLAGS=$_gcc_cflags_save;


#
# Check whether GCC inline assembler supports SSSE3 instructions
# This is required for the AES-NI instructions.
#
AC_CACHE_CHECK([whether GCC inline assembler supports SSSE3 instructions],
       [gcry_cv_gcc_inline_asm_ssse3],
       [if test "$mpi_cpu_arch" != "x86" ; then
          gcry_cv_gcc_inline_asm_ssse3="n/a"
        else
          gcry_cv_gcc_inline_asm_ssse3=no
          AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[static unsigned char be_mask[16] __attribute__ ((aligned (16))) =
              { 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 };
            void a(void) {
              __asm__("pshufb %[mask], %%xmm2\n\t"::[mask]"m"(*be_mask):);
            }]])],
          [gcry_cv_gcc_inline_asm_ssse3=yes])
        fi])
if test "$gcry_cv_gcc_inline_asm_ssse3" = "yes" ; then
   AC_DEFINE(HAVE_GCC_INLINE_ASM_SSSE3,1,
     [Defined if inline assembler supports SSSE3 instructions])
fi


#
# Check whether GCC inline assembler supports PCLMUL instructions.
#
AC_CACHE_CHECK([whether GCC inline assembler supports PCLMUL instructions],
       [gcry_cv_gcc_inline_asm_pclmul],
       [if test "$mpi_cpu_arch" != "x86" ; then
          gcry_cv_gcc_inline_asm_pclmul="n/a"
        else
          gcry_cv_gcc_inline_asm_pclmul=no
          AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[void a(void) {
              __asm__("pclmulqdq \$0, %%xmm1, %%xmm3\n\t":::"cc");
            }]])],
          [gcry_cv_gcc_inline_asm_pclmul=yes])
        fi])
if test "$gcry_cv_gcc_inline_asm_pclmul" = "yes" ; then
   AC_DEFINE(HAVE_GCC_INLINE_ASM_PCLMUL,1,
     [Defined if inline assembler supports PCLMUL instructions])
fi

#
# Check whether GCC inline assembler supports SSE4.1 instructions.
#
AC_CACHE_CHECK([whether GCC inline assembler supports SSE4.1 instructions],
       [gcry_cv_gcc_inline_asm_sse41],
       [if test "$mpi_cpu_arch" != "x86" ; then
          gcry_cv_gcc_inline_asm_sse41="n/a"
        else
          gcry_cv_gcc_inline_asm_sse41=no
          AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[void a(void) {
              int i;
              __asm__("pextrd \$2, %%xmm0, %[out]\n\t" : [out] "=m" (i));
            }]])],
          [gcry_cv_gcc_inline_asm_sse41=yes])
        fi])
if test "$gcry_cv_gcc_inline_asm_sse41" = "yes" ; then
   AC_DEFINE(HAVE_GCC_INLINE_ASM_SSE41,1,
     [Defined if inline assembler supports SSE4.1 instructions])
fi


#
# Check whether GCC inline assembler supports AVX instructions
#
AC_CACHE_CHECK([whether GCC inline assembler supports AVX instructions],
       [gcry_cv_gcc_inline_asm_avx],
       [if test "$mpi_cpu_arch" != "x86" ; then
          gcry_cv_gcc_inline_asm_avx="n/a"
        else
          gcry_cv_gcc_inline_asm_avx=no
          AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[void a(void) {
              __asm__("xgetbv; vaesdeclast (%[mem]),%%xmm0,%%xmm7\n\t"::[mem]"r"(0):);
            }]])],
          [gcry_cv_gcc_inline_asm_avx=yes])
        fi])
if test "$gcry_cv_gcc_inline_asm_avx" = "yes" ; then
   AC_DEFINE(HAVE_GCC_INLINE_ASM_AVX,1,
     [Defined if inline assembler supports AVX instructions])
fi


#
# Check whether GCC inline assembler supports AVX2 instructions
#
AC_CACHE_CHECK([whether GCC inline assembler supports AVX2 instructions],
       [gcry_cv_gcc_inline_asm_avx2],
       [if test "$mpi_cpu_arch" != "x86" ; then
          gcry_cv_gcc_inline_asm_avx2="n/a"
        else
          gcry_cv_gcc_inline_asm_avx2=no
          AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[void a(void) {
              __asm__("xgetbv; vpbroadcastb %%xmm7,%%ymm1\n\t":::"cc");
            }]])],
          [gcry_cv_gcc_inline_asm_avx2=yes])
        fi])
if test "$gcry_cv_gcc_inline_asm_avx2" = "yes" ; then
   AC_DEFINE(HAVE_GCC_INLINE_ASM_AVX2,1,
     [Defined if inline assembler supports AVX2 instructions])
fi


#
# Check whether GCC inline assembler supports BMI2 instructions
#
AC_CACHE_CHECK([whether GCC inline assembler supports BMI2 instructions],
       [gcry_cv_gcc_inline_asm_bmi2],
       [if test "$mpi_cpu_arch" != "x86" ; then
          gcry_cv_gcc_inline_asm_bmi2="n/a"
        else
          gcry_cv_gcc_inline_asm_bmi2=no
          AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[unsigned int a(unsigned int x, unsigned int y) {
              unsigned int tmp1, tmp2;
              asm ("rorxl %2, %1, %0"
                   : "=r" (tmp1)
                   : "rm0" (x), "J" (32 - ((23) & 31)));
              asm ("andnl %2, %1, %0"
                   : "=r" (tmp2)
                   : "r0" (x), "rm" (y));
              return tmp1 + tmp2;
            }]])],
          [gcry_cv_gcc_inline_asm_bmi2=yes])
        fi])
if test "$gcry_cv_gcc_inline_asm_bmi2" = "yes" ; then
   AC_DEFINE(HAVE_GCC_INLINE_ASM_BMI2,1,
     [Defined if inline assembler supports BMI2 instructions])
fi


#
# Check whether GCC assembler needs "-Wa,--divide" to correctly handle
# constant division
#
if test $amd64_as_feature_detection = yes; then
  AC_CACHE_CHECK([whether GCC assembler handles division correctly],
       [gcry_cv_gcc_as_const_division_ok],
       [gcry_cv_gcc_as_const_division_ok=no
        AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[__asm__("xorl \$(123456789/12345678), %ebp;\n\t");]])],
          [gcry_cv_gcc_as_const_division_ok=yes])])
  if test "$gcry_cv_gcc_as_const_division_ok" = "no" ; then
    #
    # Add '-Wa,--divide' to CPPFLAGS and try check again.
    #
    _gcc_cppflags_save="$CPPFLAGS"
    CPPFLAGS="$CPPFLAGS -Wa,--divide"
    AC_CACHE_CHECK([whether GCC assembler handles division correctly with "-Wa,--divide"],
         [gcry_cv_gcc_as_const_division_with_wadivide_ok],
         [gcry_cv_gcc_as_const_division_with_wadivide_ok=no
          AC_COMPILE_IFELSE([AC_LANG_SOURCE(
            [[__asm__("xorl \$(123456789/12345678), %ebp;\n\t");]])],
            [gcry_cv_gcc_as_const_division_with_wadivide_ok=yes])])
    if test "$gcry_cv_gcc_as_const_division_with_wadivide_ok" = "no" ; then
      # '-Wa,--divide' did not work, restore old flags.
      CPPFLAGS="$_gcc_cppflags_save"
    fi
  fi
fi


#
# Check whether GCC assembler supports features needed for our amd64
# implementations
#
if test $amd64_as_feature_detection = yes; then
  AC_CACHE_CHECK([whether GCC assembler is compatible for amd64 assembly implementations],
       [gcry_cv_gcc_amd64_platform_as_ok],
       [if test "$mpi_cpu_arch" != "x86" ; then
          gcry_cv_gcc_amd64_platform_as_ok="n/a"
        else
          gcry_cv_gcc_amd64_platform_as_ok=no
          AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[__asm__(
                /* Test if '.type' and '.size' are supported.  */
                /* These work only on ELF targets. */
		"asmfunc:\n\t"
                ".size asmfunc,.-asmfunc;\n\t"
                ".type asmfunc,@function;\n\t"
		/* Test if assembler allows use of '/' for constant division
		 * (Solaris/x86 issue). If previous constant division check
		 * and "-Wa,--divide" workaround failed, this causes assembly
		 * to be disable on this machine. */
		"xorl \$(123456789/12345678), %ebp;\n\t"
            );]])],
          [gcry_cv_gcc_amd64_platform_as_ok=yes])
        fi])
  if test "$gcry_cv_gcc_amd64_platform_as_ok" = "yes" ; then
     AC_DEFINE(HAVE_COMPATIBLE_GCC_AMD64_PLATFORM_AS,1,
              [Defined if underlying assembler is compatible with amd64 assembly implementations])
  fi
  if test "$gcry_cv_gcc_amd64_platform_as_ok" = "no" &&
     test "$gcry_cv_gcc_attribute_sysv_abi" = "yes" &&
     test "$gcry_cv_gcc_default_abi_is_ms_abi" = "yes"; then
    AC_CACHE_CHECK([whether GCC assembler is compatible for WIN64 assembly implementations],
      [gcry_cv_gcc_win64_platform_as_ok],
      [gcry_cv_gcc_win64_platform_as_ok=no
      AC_COMPILE_IFELSE([AC_LANG_SOURCE(
        [[__asm__(
              ".globl asmfunc\n\t"
              "asmfunc:\n\t"
              "xorq \$(1234), %rbp;\n\t"
          );]])],
        [gcry_cv_gcc_win64_platform_as_ok=yes])])
    if test "$gcry_cv_gcc_win64_platform_as_ok" = "yes" ; then
      AC_DEFINE(HAVE_COMPATIBLE_GCC_WIN64_PLATFORM_AS,1,
                [Defined if underlying assembler is compatible with WIN64 assembly implementations])
    fi
  fi
fi


#
# Check whether GCC assembler supports features needed for assembly
# implementations that use Intel syntax
#
AC_CACHE_CHECK([whether GCC assembler is compatible for Intel syntax assembly implementations],
       [gcry_cv_gcc_platform_as_ok_for_intel_syntax],
       [if test "$mpi_cpu_arch" != "x86" ; then
          gcry_cv_gcc_platform_as_ok_for_intel_syntax="n/a"
        else
          gcry_cv_gcc_platform_as_ok_for_intel_syntax=no
          AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[__asm__(
                ".intel_syntax noprefix\n\t"
                "pxor xmm1, xmm7;\n\t"
                /* Intel syntax implementation also use GAS macros, so check
                 * for them here. */
                "VAL_A = xmm4\n\t"
                "VAL_B = xmm2\n\t"
                ".macro SET_VAL_A p1\n\t"
                "  VAL_A = \\\\p1 \n\t"
                ".endm\n\t"
                ".macro SET_VAL_B p1\n\t"
                "  VAL_B = \\\\p1 \n\t"
                ".endm\n\t"
                "vmovdqa VAL_A, VAL_B;\n\t"
                "SET_VAL_A eax\n\t"
                "SET_VAL_B ebp\n\t"
                "add VAL_A, VAL_B;\n\t"
                "add VAL_B, 0b10101;\n\t"
            );]])],
          [gcry_cv_gcc_platform_as_ok_for_intel_syntax=yes])
        fi])
if test "$gcry_cv_gcc_platform_as_ok_for_intel_syntax" = "yes" ; then
  AC_DEFINE(HAVE_INTEL_SYNTAX_PLATFORM_AS,1,
            [Defined if underlying assembler is compatible with Intel syntax assembly implementations])
fi


#
# Check whether compiler is configured for ARMv6 or newer architecture
#
AC_CACHE_CHECK([whether compiler is configured for ARMv6 or newer architecture],
       [gcry_cv_cc_arm_arch_is_v6],
       [if test "$mpi_cpu_arch" != "arm" ; then
          gcry_cv_cc_arm_arch_is_v6="n/a"
        else
          gcry_cv_cc_arm_arch_is_v6=no
          AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[
           #if defined(__arm__) && \
             ((defined(__ARM_ARCH) && __ARM_ARCH >= 6) \
             || defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) \
             || defined(__ARM_ARCH_6Z__) || defined(__ARM_ARCH_6ZK__) \
             || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6T2__) \
             || defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) \
             || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) \
             || defined(__ARM_ARCH_7EM__))
             /* empty */
           #else
             /* fail compile if not ARMv6. */
             not_armv6 not_armv6 = (not_armv6)not_armv6;
           #endif
          ]])],
          [gcry_cv_cc_arm_arch_is_v6=yes])
        fi])
if test "$gcry_cv_cc_arm_arch_is_v6" = "yes" ; then
   AC_DEFINE(HAVE_ARM_ARCH_V6,1,
     [Defined if ARM architecture is v6 or newer])
fi


#
# Check whether GCC inline assembler supports NEON instructions
#
AC_CACHE_CHECK([whether GCC inline assembler supports NEON instructions],
       [gcry_cv_gcc_inline_asm_neon],
       [if test "$mpi_cpu_arch" != "arm" ; then
          gcry_cv_gcc_inline_asm_neon="n/a"
        else
          gcry_cv_gcc_inline_asm_neon=no
          AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[__asm__(
                ".syntax unified\n\t"
                ".arm\n\t"
                ".fpu neon\n\t"
                "vld1.64 {%q0-%q1}, [%r0]!;\n\t"
                "vrev64.8 %q0, %q3;\n\t"
                "vadd.u64 %q0, %q1;\n\t"
                "vadd.s64 %d3, %d2, %d3;\n\t"
                );
            ]])],
          [gcry_cv_gcc_inline_asm_neon=yes])
        fi])
if test "$gcry_cv_gcc_inline_asm_neon" = "yes" ; then
   AC_DEFINE(HAVE_GCC_INLINE_ASM_NEON,1,
     [Defined if inline assembler supports NEON instructions])
fi


#
# Check whether GCC inline assembler supports AArch32 Crypto Extension instructions
#
AC_CACHE_CHECK([whether GCC inline assembler supports AArch32 Crypto Extension instructions],
       [gcry_cv_gcc_inline_asm_aarch32_crypto],
       [if test "$mpi_cpu_arch" != "arm" ; then
          gcry_cv_gcc_inline_asm_aarch32_crypto="n/a"
        else
          gcry_cv_gcc_inline_asm_aarch32_crypto=no
          AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[__asm__(
                ".syntax unified\n\t"
                ".arch armv8-a\n\t"
                ".arm\n\t"
                ".fpu crypto-neon-fp-armv8\n\t"

                "sha1h.32 q0, q0;\n\t"
                "sha1c.32 q0, q0, q0;\n\t"
                "sha1p.32 q0, q0, q0;\n\t"
                "sha1su0.32 q0, q0, q0;\n\t"
                "sha1su1.32 q0, q0;\n\t"

                "sha256h.32 q0, q0, q0;\n\t"
                "sha256h2.32 q0, q0, q0;\n\t"
                "sha1p.32 q0, q0, q0;\n\t"
                "sha256su0.32 q0, q0;\n\t"
                "sha256su1.32 q0, q0, q15;\n\t"

                "aese.8 q0, q0;\n\t"
                "aesd.8 q0, q0;\n\t"
                "aesmc.8 q0, q0;\n\t"
                "aesimc.8 q0, q0;\n\t"

                "vmull.p64 q0, d0, d0;\n\t"
                );
            ]])],
          [gcry_cv_gcc_inline_asm_aarch32_crypto=yes])
        fi])
if test "$gcry_cv_gcc_inline_asm_aarch32_crypto" = "yes" ; then
   AC_DEFINE(HAVE_GCC_INLINE_ASM_AARCH32_CRYPTO,1,
     [Defined if inline assembler supports AArch32 Crypto Extension instructions])
fi


#
# Check whether GCC inline assembler supports AArch64 NEON instructions
#
AC_CACHE_CHECK([whether GCC inline assembler supports AArch64 NEON instructions],
       [gcry_cv_gcc_inline_asm_aarch64_neon],
       [if test "$mpi_cpu_arch" != "aarch64" ; then
          gcry_cv_gcc_inline_asm_aarch64_neon="n/a"
        else
          gcry_cv_gcc_inline_asm_aarch64_neon=no
          AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[__asm__(
                ".cpu generic+simd\n\t"
                "mov w0, \#42;\n\t"
                "dup v0.8b, w0;\n\t"
                "ld4 {v0.8b,v1.8b,v2.8b,v3.8b},[x0],\#32;\n\t"
                );
            ]])],
          [gcry_cv_gcc_inline_asm_aarch64_neon=yes])
        fi])
if test "$gcry_cv_gcc_inline_asm_aarch64_neon" = "yes" ; then
   AC_DEFINE(HAVE_GCC_INLINE_ASM_AARCH64_NEON,1,
     [Defined if inline assembler supports AArch64 NEON instructions])
fi


#
# Check whether GCC inline assembler supports AArch64 Crypto Extension instructions
#
AC_CACHE_CHECK([whether GCC inline assembler supports AArch64 Crypto Extension instructions],
       [gcry_cv_gcc_inline_asm_aarch64_crypto],
       [if test "$mpi_cpu_arch" != "aarch64" ; then
          gcry_cv_gcc_inline_asm_aarch64_crypto="n/a"
        else
          gcry_cv_gcc_inline_asm_aarch64_crypto=no
          AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[__asm__(
                ".cpu generic+simd+crypto\n\t"

                "mov w0, \#42;\n\t"
                "dup v0.8b, w0;\n\t"
                "ld4 {v0.8b,v1.8b,v2.8b,v3.8b},[x0],\#32;\n\t"

                "sha1h s0, s0;\n\t"
                "sha1c q0, s0, v0.4s;\n\t"
                "sha1p q0, s0, v0.4s;\n\t"
                "sha1su0 v0.4s, v0.4s, v0.4s;\n\t"
                "sha1su1 v0.4s, v0.4s;\n\t"

                "sha256h q0, q0, v0.4s;\n\t"
                "sha256h2 q0, q0, v0.4s;\n\t"
                "sha1p q0, s0, v0.4s;\n\t"
                "sha256su0 v0.4s, v0.4s;\n\t"
                "sha256su1 v0.4s, v0.4s, v31.4s;\n\t"

                "aese v0.16b, v0.16b;\n\t"
                "aesd v0.16b, v0.16b;\n\t"
                "aesmc v0.16b, v0.16b;\n\t"
                "aesimc v0.16b, v0.16b;\n\t"

                "pmull v0.1q, v0.1d, v31.1d;\n\t"
                "pmull2 v0.1q, v0.2d, v31.2d;\n\t"
                );
            ]])],
          [gcry_cv_gcc_inline_asm_aarch64_crypto=yes])
        fi])
if test "$gcry_cv_gcc_inline_asm_aarch64_crypto" = "yes" ; then
   AC_DEFINE(HAVE_GCC_INLINE_ASM_AARCH64_CRYPTO,1,
     [Defined if inline assembler supports AArch64 Crypto Extension instructions])
fi


#######################################
#### Checks for library functions. ####
#######################################

AC_FUNC_VPRINTF
# We have replacements for these in src/missing-string.c
AC_CHECK_FUNCS(stpcpy strcasecmp)
# We have replacements for these in src/g10lib.h
AC_CHECK_FUNCS(strtoul memmove stricmp atexit raise)
# Other checks
AC_CHECK_FUNCS(strerror rand mmap getpagesize sysconf waitpid wait4)
AC_CHECK_FUNCS(gettimeofday getrusage gethrtime clock_gettime syslog)
AC_CHECK_FUNCS(syscall fcntl ftruncate flockfile)

GNUPG_CHECK_MLOCK

#
# Replacement functions.
#
AC_REPLACE_FUNCS([getpid clock])


#
# Check whether it is necessary to link against libdl.
#
DL_LIBS=""
if test "$use_hmac_binary_check" = yes ; then
  _gcry_save_libs="$LIBS"
  LIBS=""
  AC_SEARCH_LIBS(dlopen, c dl,,,)
  DL_LIBS=$LIBS
  LIBS="$_gcry_save_libs"
  LIBGCRYPT_CONFIG_LIBS="${LIBGCRYPT_CONFIG_LIBS} ${DL_LIBS}"
fi
AC_SUBST(DL_LIBS)


#
# Check whether we can use Linux capabilities as requested.
#
if test "$use_capabilities" = "yes" ; then
use_capabilities=no
AC_CHECK_HEADERS(sys/capability.h)
if test "$ac_cv_header_sys_capability_h" = "yes" ; then
  AC_CHECK_LIB(cap, cap_init, ac_need_libcap=1)
  if test "$ac_cv_lib_cap_cap_init" = "yes"; then
     AC_DEFINE(USE_CAPABILITIES,1,
               [define if capabilities should be used])
     LIBS="$LIBS -lcap"
     use_capabilities=yes
  fi
fi
if test "$use_capabilities" = "no" ; then
    AC_MSG_WARN([[
***
*** The use of capabilities on this system is not possible.
*** You need a recent Linux kernel and some patches:
***   fcaps-2.2.9-990610.patch      (kernel patch for 2.2.9)
***   fcap-module-990613.tar.gz     (kernel module)
***   libcap-1.92.tar.gz            (user mode library and utilities)
*** And you have to configure the kernel with CONFIG_VFS_CAP_PLUGIN
*** set (filesystems menu). Be warned: This code is *really* ALPHA.
***]])
fi
fi

# Check whether a random device is available.
if test "$try_dev_random" = yes ; then
    AC_CACHE_CHECK(for random device, ac_cv_have_dev_random,
    [if test -r "$NAME_OF_DEV_RANDOM" && test -r "$NAME_OF_DEV_URANDOM" ; then
      ac_cv_have_dev_random=yes; else ac_cv_have_dev_random=no; fi])
    if test "$ac_cv_have_dev_random" = yes; then
        AC_DEFINE(HAVE_DEV_RANDOM,1,
                 [defined if the system supports a random device] )
    fi
else
    AC_MSG_CHECKING(for random device)
    ac_cv_have_dev_random=no
    AC_MSG_RESULT(has been disabled)
fi

# Figure out the random modules for this configuration.
if test "$random" = "default"; then

    # Select default value.
    if test "$ac_cv_have_dev_random" = yes; then
        # Try Linuxish random device.
        random_modules="linux"
    else
        case "${host}" in
        *-*-mingw32ce*)
          # WindowsCE random device.
          random_modules="w32ce"
          ;;
        *-*-mingw32*|*-*-cygwin*)
          # Windows random device.
          random_modules="w32"
          ;;
        *)
          # Build everything, allow to select at runtime.
          random_modules="$auto_random_modules"
          ;;
        esac
    fi
else
    if test "$random" = "auto"; then
        # Build everything, allow to select at runtime.
        random_modules="$auto_random_modules"
    else
        random_modules="$random"
    fi
fi


#
# Other defines
#
if test mym4_isgit = "yes"; then
    AC_DEFINE(IS_DEVELOPMENT_VERSION,1,
              [Defined if this is not a regular release])
fi


AM_CONDITIONAL(CROSS_COMPILING, test x$cross_compiling = xyes)


# This is handy for debugging so the compiler doesn't rearrange
# things and eliminate variables.
AC_ARG_ENABLE(optimization,
       AC_HELP_STRING([--disable-optimization],
		      [disable compiler optimization]),
                      [if test $enableval = no ; then
                         CFLAGS=`echo $CFLAGS | sed 's/-O[[0-9]]//'`
                       fi])

AC_MSG_NOTICE([checking for cc features])
# CFLAGS mangling when using gcc.
if test "$GCC" = yes; then
    AC_MSG_CHECKING([if gcc supports -fno-delete-null-pointer-checks])
    _gcc_cflags_save=$CFLAGS
    CFLAGS="-fno-delete-null-pointer-checks"
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],_gcc_wopt=yes,_gcc_wopt=no)
    AC_MSG_RESULT($_gcc_wopt)
    CFLAGS=$_gcc_cflags_save;
    if test x"$_gcc_wopt" = xyes ; then
       CFLAGS="$CFLAGS -fno-delete-null-pointer-checks"
    fi

    CFLAGS="$CFLAGS -Wall"
    if test "$USE_MAINTAINER_MODE" = "yes"; then
        CFLAGS="$CFLAGS -Wcast-align -Wshadow -Wstrict-prototypes"
        CFLAGS="$CFLAGS -Wformat -Wno-format-y2k -Wformat-security"

        # If -Wno-missing-field-initializers is supported we can enable a
        # a bunch of really useful warnings.
        AC_MSG_CHECKING([if gcc supports -Wno-missing-field-initializers])
        _gcc_cflags_save=$CFLAGS
        CFLAGS="-Wno-missing-field-initializers"
        AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],_gcc_wopt=yes,_gcc_wopt=no)
        AC_MSG_RESULT($_gcc_wopt)
        CFLAGS=$_gcc_cflags_save;
        if test x"$_gcc_wopt" = xyes ; then
          CFLAGS="$CFLAGS -W -Wextra -Wbad-function-cast"
          CFLAGS="$CFLAGS -Wwrite-strings"
          CFLAGS="$CFLAGS -Wdeclaration-after-statement"
          CFLAGS="$CFLAGS -Wno-missing-field-initializers"
          CFLAGS="$CFLAGS -Wno-sign-compare"
        fi

        AC_MSG_CHECKING([if gcc supports -Wpointer-arith])
        _gcc_cflags_save=$CFLAGS
        CFLAGS="-Wpointer-arith"
        AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],_gcc_wopt=yes,_gcc_wopt=no)
        AC_MSG_RESULT($_gcc_wopt)
        CFLAGS=$_gcc_cflags_save;
        if test x"$_gcc_wopt" = xyes ; then
          CFLAGS="$CFLAGS -Wpointer-arith"
        fi
    fi
fi

# Check whether as(1) supports a noeexecstack feature.  This test
# includes an override option.
CL_AS_NOEXECSTACK


AC_SUBST(LIBGCRYPT_CONFIG_API_VERSION)
AC_SUBST(LIBGCRYPT_CONFIG_LIBS)
AC_SUBST(LIBGCRYPT_CONFIG_CFLAGS)
AC_SUBST(LIBGCRYPT_CONFIG_HOST)
AC_SUBST(LIBGCRYPT_THREAD_MODULES)

AC_CONFIG_COMMANDS([gcrypt-conf],[[
chmod +x src/libgcrypt-config
]],[[
prefix=$prefix
exec_prefix=$exec_prefix
libdir=$libdir
datadir=$datadir
DATADIRNAME=$DATADIRNAME
]])

#####################
#### Conclusion. ####
#####################

# Check that requested feature can actually be used and define
# ENABLE_foo_SUPPORT macros.

if test x"$aesnisupport" = xyes ; then
  if test "$gcry_cv_gcc_inline_asm_ssse3" != "yes" ; then
    aesnisupport="no (unsupported by compiler)"
  fi
fi
if test x"$pclmulsupport" = xyes ; then
  if test "$gcry_cv_gcc_inline_asm_pclmul" != "yes" ; then
    pclmulsupport="no (unsupported by compiler)"
  fi
fi
if test x"$sse41support" = xyes ; then
  if test "$gcry_cv_gcc_inline_asm_sse41" != "yes" ; then
    sse41support="no (unsupported by compiler)"
  fi
fi
if test x"$avxsupport" = xyes ; then
  if test "$gcry_cv_gcc_inline_asm_avx" != "yes" ; then
    avxsupport="no (unsupported by compiler)"
  fi
fi
if test x"$avx2support" = xyes ; then
  if test "$gcry_cv_gcc_inline_asm_avx2" != "yes" ; then
    avx2support="no (unsupported by compiler)"
  fi
fi
if test x"$neonsupport" = xyes ; then
  if test "$gcry_cv_gcc_inline_asm_neon" != "yes" ; then
    if test "$gcry_cv_gcc_inline_asm_aarch64_neon" != "yes" ; then
      neonsupport="no (unsupported by compiler)"
    fi
  fi
fi
if test x"$armcryptosupport" = xyes ; then
  if test "$gcry_cv_gcc_inline_asm_aarch32_crypto" != "yes" ; then
    if test "$gcry_cv_gcc_inline_asm_aarch64_crypto" != "yes" ; then
      neonsupport="no (unsupported by compiler)"
    fi
  fi
fi

if test x"$aesnisupport" = xyes ; then
  AC_DEFINE(ENABLE_AESNI_SUPPORT, 1,
            [Enable support for Intel AES-NI instructions.])
fi
if test x"$pclmulsupport" = xyes ; then
  AC_DEFINE(ENABLE_PCLMUL_SUPPORT, 1,
            [Enable support for Intel PCLMUL instructions.])
fi
if test x"$sse41support" = xyes ; then
  AC_DEFINE(ENABLE_SSE41_SUPPORT, 1,
            [Enable support for Intel SSE4.1 instructions.])
fi
if test x"$avxsupport" = xyes ; then
  AC_DEFINE(ENABLE_AVX_SUPPORT,1,
            [Enable support for Intel AVX instructions.])
fi
if test x"$avx2support" = xyes ; then
  AC_DEFINE(ENABLE_AVX2_SUPPORT,1,
            [Enable support for Intel AVX2 instructions.])
fi
if test x"$neonsupport" = xyes ; then
  AC_DEFINE(ENABLE_NEON_SUPPORT,1,
            [Enable support for ARM NEON instructions.])
fi
if test x"$armcryptosupport" = xyes ; then
  AC_DEFINE(ENABLE_ARM_CRYPTO_SUPPORT,1,
            [Enable support for ARMv8 Crypto Extension instructions.])
fi
if test x"$jentsupport" = xyes ; then
  AC_DEFINE(ENABLE_JENT_SUPPORT, 1,
            [Enable support for the jitter entropy collector.])
fi
if test x"$padlocksupport" = xyes ; then
  AC_DEFINE(ENABLE_PADLOCK_SUPPORT, 1,
            [Enable support for the PadLock engine.])
fi
if test x"$drngsupport" = xyes ; then
  AC_DEFINE(ENABLE_DRNG_SUPPORT, 1,
            [Enable support for Intel DRNG (RDRAND instruction).])
fi


# Define conditional sources and config.h symbols depending on the
# selected ciphers, pubkey-ciphers, digests, kdfs, and random modules.

LIST_MEMBER(arcfour, $enabled_ciphers)
if test "$found" = "1"; then
   GCRYPT_CIPHERS="$GCRYPT_CIPHERS arcfour.lo"
   AC_DEFINE(USE_ARCFOUR, 1, [Defined if this module should be included])

   case "${host}" in
      x86_64-*-*)
         # Build with the assembly implementation
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS arcfour-amd64.lo"
      ;;
   esac
fi

LIST_MEMBER(blowfish, $enabled_ciphers)
if test "$found" = "1" ; then
   GCRYPT_CIPHERS="$GCRYPT_CIPHERS blowfish.lo"
   AC_DEFINE(USE_BLOWFISH, 1, [Defined if this module should be included])

   case "${host}" in
      x86_64-*-*)
         # Build with the assembly implementation
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS blowfish-amd64.lo"
      ;;
      arm*-*-*)
         # Build with the assembly implementation
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS blowfish-arm.lo"
      ;;
   esac
fi

LIST_MEMBER(cast5, $enabled_ciphers)
if test "$found" = "1" ; then
   GCRYPT_CIPHERS="$GCRYPT_CIPHERS cast5.lo"
   AC_DEFINE(USE_CAST5, 1, [Defined if this module should be included])

   case "${host}" in
      x86_64-*-*)
         # Build with the assembly implementation
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS cast5-amd64.lo"
      ;;
      arm*-*-*)
         # Build with the assembly implementation
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS cast5-arm.lo"
      ;;
   esac
fi

LIST_MEMBER(des, $enabled_ciphers)
if test "$found" = "1" ; then
   GCRYPT_CIPHERS="$GCRYPT_CIPHERS des.lo"
   AC_DEFINE(USE_DES, 1, [Defined if this module should be included])

   case "${host}" in
      x86_64-*-*)
         # Build with the assembly implementation
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS des-amd64.lo"
      ;;
   esac
fi

LIST_MEMBER(aes, $enabled_ciphers)
if test "$found" = "1" ; then
   GCRYPT_CIPHERS="$GCRYPT_CIPHERS rijndael.lo"
   AC_DEFINE(USE_AES, 1, [Defined if this module should be included])

   case "${host}" in
      x86_64-*-*)
         # Build with the assembly implementation
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS rijndael-amd64.lo"

         # Build with the SSSE3 implementation
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS rijndael-ssse3-amd64.lo"
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS rijndael-ssse3-amd64-asm.lo"
      ;;
      arm*-*-*)
         # Build with the assembly implementation
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS rijndael-arm.lo"

         # Build with the ARMv8/AArch32 CE implementation
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS rijndael-armv8-ce.lo"
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS rijndael-armv8-aarch32-ce.lo"
      ;;
      aarch64-*-*)
         # Build with the assembly implementation
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS rijndael-aarch64.lo"

         # Build with the ARMv8/AArch64 CE implementation
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS rijndael-armv8-ce.lo"
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS rijndael-armv8-aarch64-ce.lo"
      ;;
   esac

   case "$mpi_cpu_arch" in
     x86)
         # Build with the AES-NI implementation
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS rijndael-aesni.lo"

         # Build with the Padlock implementation
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS rijndael-padlock.lo"
      ;;
   esac
fi

LIST_MEMBER(twofish, $enabled_ciphers)
if test "$found" = "1" ; then
   GCRYPT_CIPHERS="$GCRYPT_CIPHERS twofish.lo"
   AC_DEFINE(USE_TWOFISH, 1, [Defined if this module should be included])

   case "${host}" in
      x86_64-*-*)
         # Build with the assembly implementation
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS twofish-amd64.lo"

         if test x"$avx2support" = xyes ; then
            # Build with the AVX2 implementation
            GCRYPT_CIPHERS="$GCRYPT_CIPHERS twofish-avx2-amd64.lo"
         fi
      ;;
      arm*-*-*)
         # Build with the assembly implementation
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS twofish-arm.lo"
      ;;
      aarch64-*-*)
         # Build with the assembly implementation
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS twofish-aarch64.lo"
      ;;
   esac
fi

LIST_MEMBER(serpent, $enabled_ciphers)
if test "$found" = "1" ; then
   GCRYPT_CIPHERS="$GCRYPT_CIPHERS serpent.lo"
   AC_DEFINE(USE_SERPENT, 1, [Defined if this module should be included])

   case "${host}" in
      x86_64-*-*)
         # Build with the SSE2 implementation
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS serpent-sse2-amd64.lo"
      ;;
   esac

   if test x"$avx2support" = xyes ; then
      # Build with the AVX2 implementation
      GCRYPT_CIPHERS="$GCRYPT_CIPHERS serpent-avx2-amd64.lo"
   fi

   if test x"$neonsupport" = xyes ; then
      # Build with the NEON implementation
      GCRYPT_CIPHERS="$GCRYPT_CIPHERS serpent-armv7-neon.lo"
   fi
fi

LIST_MEMBER(rfc2268, $enabled_ciphers)
if test "$found" = "1" ; then
   GCRYPT_CIPHERS="$GCRYPT_CIPHERS rfc2268.lo"
   AC_DEFINE(USE_RFC2268, 1, [Defined if this module should be included])
fi

LIST_MEMBER(seed, $enabled_ciphers)
if test "$found" = "1" ; then
   GCRYPT_CIPHERS="$GCRYPT_CIPHERS seed.lo"
   AC_DEFINE(USE_SEED, 1, [Defined if this module should be included])
fi

LIST_MEMBER(camellia, $enabled_ciphers)
if test "$found" = "1" ; then
   GCRYPT_CIPHERS="$GCRYPT_CIPHERS camellia.lo camellia-glue.lo"
   AC_DEFINE(USE_CAMELLIA, 1, [Defined if this module should be included])

   case "${host}" in
      arm*-*-*)
         # Build with the assembly implementation
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS camellia-arm.lo"
      ;;
      aarch64-*-*)
         # Build with the assembly implementation
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS camellia-aarch64.lo"
      ;;
   esac

   if test x"$avxsupport" = xyes ; then
      if test x"$aesnisupport" = xyes ; then
        # Build with the AES-NI/AVX implementation
        GCRYPT_CIPHERS="$GCRYPT_CIPHERS camellia-aesni-avx-amd64.lo"
      fi
   fi

   if test x"$avx2support" = xyes ; then
      if test x"$aesnisupport" = xyes ; then
        # Build with the AES-NI/AVX2 implementation
        GCRYPT_CIPHERS="$GCRYPT_CIPHERS camellia-aesni-avx2-amd64.lo"
      fi
   fi
fi

LIST_MEMBER(idea, $enabled_ciphers)
if test "$found" = "1" ; then
   GCRYPT_CIPHERS="$GCRYPT_CIPHERS idea.lo"
   AC_DEFINE(USE_IDEA, 1, [Defined if this module should be included])
fi

LIST_MEMBER(salsa20, $enabled_ciphers)
if test "$found" = "1" ; then
   GCRYPT_CIPHERS="$GCRYPT_CIPHERS salsa20.lo"
   AC_DEFINE(USE_SALSA20, 1, [Defined if this module should be included])

   case "${host}" in
      x86_64-*-*)
         # Build with the assembly implementation
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS salsa20-amd64.lo"
      ;;
   esac

   if test x"$neonsupport" = xyes ; then
     # Build with the NEON implementation
     GCRYPT_CIPHERS="$GCRYPT_CIPHERS salsa20-armv7-neon.lo"
   fi
fi

LIST_MEMBER(gost28147, $enabled_ciphers)
if test "$found" = "1" ; then
   GCRYPT_CIPHERS="$GCRYPT_CIPHERS gost28147.lo"
   AC_DEFINE(USE_GOST28147, 1, [Defined if this module should be included])
fi

LIST_MEMBER(chacha20, $enabled_ciphers)
if test "$found" = "1" ; then
   GCRYPT_CIPHERS="$GCRYPT_CIPHERS chacha20.lo"
   AC_DEFINE(USE_CHACHA20, 1, [Defined if this module should be included])

   case "${host}" in
      x86_64-*-*)
         # Build with the assembly implementation
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS chacha20-sse2-amd64.lo"
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS chacha20-ssse3-amd64.lo"
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS chacha20-avx2-amd64.lo"
      ;;
   esac

   if test x"$neonsupport" = xyes ; then
     # Build with the NEON implementation
     GCRYPT_CIPHERS="$GCRYPT_CIPHERS chacha20-armv7-neon.lo"
   fi
fi

case "${host}" in
   x86_64-*-*)
      # Build with the assembly implementation
      GCRYPT_CIPHERS="$GCRYPT_CIPHERS poly1305-sse2-amd64.lo"
      GCRYPT_CIPHERS="$GCRYPT_CIPHERS poly1305-avx2-amd64.lo"
   ;;
esac

if test x"$neonsupport" = xyes ; then
   # Build with the NEON implementation
   GCRYPT_CIPHERS="$GCRYPT_CIPHERS poly1305-armv7-neon.lo"
fi

LIST_MEMBER(dsa, $enabled_pubkey_ciphers)
if test "$found" = "1" ; then
   GCRYPT_PUBKEY_CIPHERS="$GCRYPT_PUBKEY_CIPHERS dsa.lo"
   AC_DEFINE(USE_DSA, 1, [Defined if this module should be included])
fi

LIST_MEMBER(rsa, $enabled_pubkey_ciphers)
if test "$found" = "1" ; then
   GCRYPT_PUBKEY_CIPHERS="$GCRYPT_PUBKEY_CIPHERS rsa.lo"
   AC_DEFINE(USE_RSA, 1, [Defined if this module should be included])
fi

LIST_MEMBER(elgamal, $enabled_pubkey_ciphers)
if test "$found" = "1" ; then
   GCRYPT_PUBKEY_CIPHERS="$GCRYPT_PUBKEY_CIPHERS elgamal.lo"
   AC_DEFINE(USE_ELGAMAL, 1, [Defined if this module should be included])
fi

LIST_MEMBER(ecc, $enabled_pubkey_ciphers)
if test "$found" = "1" ; then
   GCRYPT_PUBKEY_CIPHERS="$GCRYPT_PUBKEY_CIPHERS \
                          ecc.lo ecc-curves.lo ecc-misc.lo \
                          ecc-ecdsa.lo ecc-eddsa.lo ecc-gost.lo"
   AC_DEFINE(USE_ECC, 1, [Defined if this module should be included])
fi

LIST_MEMBER(crc, $enabled_digests)
if test "$found" = "1" ; then
   GCRYPT_DIGESTS="$GCRYPT_DIGESTS crc.lo"
   AC_DEFINE(USE_CRC, 1, [Defined if this module should be included])

   case "${host}" in
      i?86-*-* | x86_64-*-*)
         # Build with the assembly implementation
         GCRYPT_DIGESTS="$GCRYPT_DIGESTS crc-intel-pclmul.lo"
      ;;
   esac
fi

LIST_MEMBER(gostr3411-94, $enabled_digests)
if test "$found" = "1" ; then
   # GOST R 34.11-94 internally uses GOST 28147-89
   LIST_MEMBER(gost28147, $enabled_ciphers)
   if test "$found" = "1" ; then
      GCRYPT_DIGESTS="$GCRYPT_DIGESTS gostr3411-94.lo"
      AC_DEFINE(USE_GOST_R_3411_94, 1, [Defined if this module should be included])
   fi
fi

LIST_MEMBER(stribog, $enabled_digests)
if test "$found" = "1" ; then
   GCRYPT_DIGESTS="$GCRYPT_DIGESTS stribog.lo"
   AC_DEFINE(USE_GOST_R_3411_12, 1, [Defined if this module should be included])
fi

LIST_MEMBER(md2, $enabled_digests)
if test "$found" = "1" ; then
   GCRYPT_DIGESTS="$GCRYPT_DIGESTS md2.lo"
   AC_DEFINE(USE_MD2, 1, [Defined if this module should be included])
fi

LIST_MEMBER(md4, $enabled_digests)
if test "$found" = "1" ; then
   GCRYPT_DIGESTS="$GCRYPT_DIGESTS md4.lo"
   AC_DEFINE(USE_MD4, 1, [Defined if this module should be included])
fi

LIST_MEMBER(md5, $enabled_digests)
if test "$found" = "1" ; then
   GCRYPT_DIGESTS="$GCRYPT_DIGESTS md5.lo"
   AC_DEFINE(USE_MD5, 1, [Defined if this module should be included])
fi

LIST_MEMBER(rmd160, $enabled_digests)
if test "$found" = "1" ; then
   GCRYPT_DIGESTS="$GCRYPT_DIGESTS rmd160.lo"
   AC_DEFINE(USE_RMD160, 1, [Defined if this module should be included])
fi

LIST_MEMBER(sha256, $enabled_digests)
if test "$found" = "1" ; then
   GCRYPT_DIGESTS="$GCRYPT_DIGESTS sha256.lo"
   AC_DEFINE(USE_SHA256, 1, [Defined if this module should be included])

   case "${host}" in
      x86_64-*-*)
         # Build with the assembly implementation
         GCRYPT_DIGESTS="$GCRYPT_DIGESTS sha256-ssse3-amd64.lo"
         GCRYPT_DIGESTS="$GCRYPT_DIGESTS sha256-avx-amd64.lo"
         GCRYPT_DIGESTS="$GCRYPT_DIGESTS sha256-avx2-bmi2-amd64.lo"
      ;;
      arm*-*-*)
         # Build with the assembly implementation
         GCRYPT_DIGESTS="$GCRYPT_DIGESTS sha256-armv8-aarch32-ce.lo"
      ;;
      aarch64-*-*)
         # Build with the assembly implementation
         GCRYPT_DIGESTS="$GCRYPT_DIGESTS sha256-armv8-aarch64-ce.lo"
      ;;
   esac
fi

LIST_MEMBER(sha512, $enabled_digests)
if test "$found" = "1" ; then
   GCRYPT_DIGESTS="$GCRYPT_DIGESTS sha512.lo"
   AC_DEFINE(USE_SHA512, 1, [Defined if this module should be included])

   case "${host}" in
      x86_64-*-*)
         # Build with the assembly implementation
         GCRYPT_DIGESTS="$GCRYPT_DIGESTS sha512-ssse3-amd64.lo"
         GCRYPT_DIGESTS="$GCRYPT_DIGESTS sha512-avx-amd64.lo"
         GCRYPT_DIGESTS="$GCRYPT_DIGESTS sha512-avx2-bmi2-amd64.lo"
      ;;
      arm*-*-*)
         # Build with the assembly implementation
         GCRYPT_DIGESTS="$GCRYPT_DIGESTS sha512-arm.lo"
      ;;
   esac

   if test x"$neonsupport" = xyes ; then
     # Build with the NEON implementation
     GCRYPT_DIGESTS="$GCRYPT_DIGESTS sha512-armv7-neon.lo"
   fi
fi

LIST_MEMBER(sha3, $enabled_digests)
if test "$found" = "1" ; then
   GCRYPT_DIGESTS="$GCRYPT_DIGESTS keccak.lo"
   AC_DEFINE(USE_SHA3, 1, [Defined if this module should be included])

   case "${host}" in
      x86_64-*-*)
         # Build with the assembly implementation
         :
      ;;
   esac

   if test x"$neonsupport" = xyes ; then
     # Build with the NEON implementation
     GCRYPT_DIGESTS="$GCRYPT_DIGESTS keccak-armv7-neon.lo"
   fi
fi

LIST_MEMBER(tiger, $enabled_digests)
if test "$found" = "1" ; then
   GCRYPT_DIGESTS="$GCRYPT_DIGESTS tiger.lo"
   AC_DEFINE(USE_TIGER, 1, [Defined if this module should be included])
fi

LIST_MEMBER(whirlpool, $enabled_digests)
if test "$found" = "1" ; then
   GCRYPT_DIGESTS="$GCRYPT_DIGESTS whirlpool.lo"
   AC_DEFINE(USE_WHIRLPOOL, 1, [Defined if this module should be included])

   case "${host}" in
      x86_64-*-*)
         # Build with the assembly implementation
         GCRYPT_DIGESTS="$GCRYPT_DIGESTS whirlpool-sse2-amd64.lo"
      ;;
   esac
fi

LIST_MEMBER(blake2, $enabled_digests)
if test "$found" = "1" ; then
   GCRYPT_DIGESTS="$GCRYPT_DIGESTS blake2.lo"
   AC_DEFINE(USE_BLAKE2, 1, [Defined if this module should be included])
fi

# SHA-1 needs to be included always for example because it is used by
# random-csprng.c.
GCRYPT_DIGESTS="$GCRYPT_DIGESTS sha1.lo"
AC_DEFINE(USE_SHA1, 1,   [Defined if this module should be included])

case "${host}" in
  x86_64-*-*)
    # Build with the assembly implementation
    GCRYPT_DIGESTS="$GCRYPT_DIGESTS sha1-ssse3-amd64.lo"
    GCRYPT_DIGESTS="$GCRYPT_DIGESTS sha1-avx-amd64.lo"
    GCRYPT_DIGESTS="$GCRYPT_DIGESTS sha1-avx-bmi2-amd64.lo"
  ;;
  arm*-*-*)
    # Build with the assembly implementation
    GCRYPT_DIGESTS="$GCRYPT_DIGESTS sha1-armv7-neon.lo"
    GCRYPT_DIGESTS="$GCRYPT_DIGESTS sha1-armv8-aarch32-ce.lo"
  ;;
  aarch64-*-*)
    # Build with the assembly implementation
    GCRYPT_DIGESTS="$GCRYPT_DIGESTS sha1-armv8-aarch64-ce.lo"
  ;;
esac

LIST_MEMBER(scrypt, $enabled_kdfs)
if test "$found" = "1" ; then
   GCRYPT_KDFS="$GCRYPT_KDFS scrypt.lo"
   AC_DEFINE(USE_SCRYPT, 1, [Defined if this module should be included])
fi

LIST_MEMBER(linux, $random_modules)
if test "$found" = "1" ; then
   GCRYPT_RANDOM="$GCRYPT_RANDOM rndlinux.lo"
   AC_DEFINE(USE_RNDLINUX, 1, [Defined if the /dev/random RNG should be used.])
fi

LIST_MEMBER(unix, $random_modules)
if test "$found" = "1" ; then
   GCRYPT_RANDOM="$GCRYPT_RANDOM rndunix.lo"
   AC_DEFINE(USE_RNDUNIX, 1, [Defined if the default Unix RNG should be used.])
fi

LIST_MEMBER(egd, $random_modules)
if test "$found" = "1" ; then
   GCRYPT_RANDOM="$GCRYPT_RANDOM rndegd.lo"
   AC_DEFINE(USE_RNDEGD, 1, [Defined if the EGD based RNG should be used.])
fi

LIST_MEMBER(w32, $random_modules)
if test "$found" = "1" ; then
   GCRYPT_RANDOM="$GCRYPT_RANDOM rndw32.lo"
   AC_DEFINE(USE_RNDW32, 1,
             [Defined if the Windows specific RNG should be used.])
fi

LIST_MEMBER(w32ce, $random_modules)
if test "$found" = "1" ; then
   GCRYPT_RANDOM="$GCRYPT_RANDOM rndw32ce.lo"
   AC_DEFINE(USE_RNDW32CE, 1,
             [Defined if the WindowsCE specific RNG should be used.])
fi

AC_SUBST([GCRYPT_CIPHERS])
AC_SUBST([GCRYPT_PUBKEY_CIPHERS])
AC_SUBST([GCRYPT_DIGESTS])
AC_SUBST([GCRYPT_KDFS])
AC_SUBST([GCRYPT_RANDOM])

AC_SUBST(LIBGCRYPT_CIPHERS, $enabled_ciphers)
AC_SUBST(LIBGCRYPT_PUBKEY_CIPHERS, $enabled_pubkey_ciphers)
AC_SUBST(LIBGCRYPT_DIGESTS, $enabled_digests)

# For printing the configuration we need a colon separated list of
# algorithm names.
tmp=`echo "$enabled_ciphers" | tr ' ' : `
AC_DEFINE_UNQUOTED(LIBGCRYPT_CIPHERS, "$tmp",
                   [List of available cipher algorithms])
tmp=`echo "$enabled_pubkey_ciphers" | tr ' ' : `
AC_DEFINE_UNQUOTED(LIBGCRYPT_PUBKEY_CIPHERS, "$tmp",
                   [List of available public key cipher algorithms])
tmp=`echo "$enabled_digests" | tr ' ' : `
AC_DEFINE_UNQUOTED(LIBGCRYPT_DIGESTS, "$tmp",
                   [List of available digest algorithms])
tmp=`echo "$enabled_kdfs" | tr ' ' : `
AC_DEFINE_UNQUOTED(LIBGCRYPT_KDFS, "$tmp",
                   [List of available KDF algorithms])


#
# Define conditional sources depending on the used hardware platform.
# Note that all possible modules must also be listed in
# src/Makefile.am (EXTRA_libgcrypt_la_SOURCES).
#
GCRYPT_HWF_MODULES=
case "$mpi_cpu_arch" in
     x86)
        AC_DEFINE(HAVE_CPU_ARCH_X86, 1,   [Defined for the x86 platforms])
        GCRYPT_HWF_MODULES="hwf-x86.lo"
        ;;
     alpha)
        AC_DEFINE(HAVE_CPU_ARCH_ALPHA, 1, [Defined for Alpha platforms])
        ;;
     sparc)
        AC_DEFINE(HAVE_CPU_ARCH_SPARC, 1, [Defined for SPARC platforms])
        ;;
     mips)
        AC_DEFINE(HAVE_CPU_ARCH_MIPS, 1,  [Defined for MIPS platforms])
        ;;
     m68k)
        AC_DEFINE(HAVE_CPU_ARCH_M68K, 1,  [Defined for M68k platforms])
        ;;
     ppc)
        AC_DEFINE(HAVE_CPU_ARCH_PPC, 1,   [Defined for PPC platforms])
        ;;
     arm)
        AC_DEFINE(HAVE_CPU_ARCH_ARM, 1,   [Defined for ARM platforms])
        GCRYPT_HWF_MODULES="hwf-arm.lo"
        ;;
     aarch64)
        AC_DEFINE(HAVE_CPU_ARCH_ARM, 1,   [Defined for ARM AArch64 platforms])
        GCRYPT_HWF_MODULES="hwf-arm.lo"
        ;;
esac
AC_SUBST([GCRYPT_HWF_MODULES])


#
# Option to disable building of doc file
#
build_doc=yes
AC_ARG_ENABLE([doc], AC_HELP_STRING([--disable-doc],
                                    [do not build the documentation]),
                     build_doc=$enableval, build_doc=yes)
AM_CONDITIONAL([BUILD_DOC], [test "x$build_doc" != xno])


#
# Provide information about the build.
#
BUILD_REVISION="mym4_revision"
AC_SUBST(BUILD_REVISION)
AC_DEFINE_UNQUOTED(BUILD_REVISION, "$BUILD_REVISION",
                   [GIT commit id revision used to build this package])

changequote(,)dnl
BUILD_FILEVERSION=`echo "$VERSION" | sed 's/\([0-9.]*\).*/\1./;s/\./,/g'`
changequote([,])dnl
BUILD_FILEVERSION="${BUILD_FILEVERSION}mym4_revision_dec"
AC_SUBST(BUILD_FILEVERSION)

AC_ARG_ENABLE([build-timestamp],
  AC_HELP_STRING([--enable-build-timestamp],
                 [set an explicit build timestamp for reproducibility.
                  (default is the current time in ISO-8601 format)]),
     [if test "$enableval" = "yes"; then
        BUILD_TIMESTAMP=`date -u +%Y-%m-%dT%H:%M+0000 2>/dev/null || date`
      else
        BUILD_TIMESTAMP="$enableval"
      fi],
     [BUILD_TIMESTAMP="<none>"])
AC_SUBST(BUILD_TIMESTAMP)
AC_DEFINE_UNQUOTED(BUILD_TIMESTAMP, "$BUILD_TIMESTAMP",
                   [The time this package was configured for a build])


# And create the files.
AC_CONFIG_FILES([
Makefile
m4/Makefile
compat/Makefile
mpi/Makefile
cipher/Makefile
random/Makefile
doc/Makefile
src/Makefile
src/gcrypt.h
src/libgcrypt-config
src/versioninfo.rc
tests/Makefile
])
AC_CONFIG_FILES([tests/hashtest-256g], [chmod +x tests/hashtest-256g])
AC_CONFIG_FILES([tests/basic-disable-all-hwf], [chmod +x tests/basic-disable-all-hwf])
AC_OUTPUT


detection_module="${GCRYPT_HWF_MODULES%.lo}"
test -n "$detection_module" || detection_module="none"

# Give some feedback
GCRY_MSG_SHOW([],[])
GCRY_MSG_SHOW([Libgcrypt],[v${VERSION} has been configured as follows:])
GCRY_MSG_SHOW([],[])
GCRY_MSG_SHOW([Platform:                 ],[$PRINTABLE_OS_NAME ($host)])
GCRY_MSG_SHOW([Hardware detection module:],[$detection_module])
GCRY_MSG_WRAP([Enabled cipher algorithms:],[$enabled_ciphers])
GCRY_MSG_WRAP([Enabled digest algorithms:],[$enabled_digests])
GCRY_MSG_WRAP([Enabled kdf algorithms:   ],[$enabled_kdfs])
GCRY_MSG_WRAP([Enabled pubkey algorithms:],[$enabled_pubkey_ciphers])
GCRY_MSG_SHOW([Random number generator:  ],[$random])
GCRY_MSG_SHOW([Try using jitter entropy: ],[$jentsupport])
GCRY_MSG_SHOW([Using linux capabilities: ],[$use_capabilities])
GCRY_MSG_SHOW([Try using Padlock crypto: ],[$padlocksupport])
GCRY_MSG_SHOW([Try using AES-NI crypto:  ],[$aesnisupport])
GCRY_MSG_SHOW([Try using Intel PCLMUL:   ],[$pclmulsupport])
GCRY_MSG_SHOW([Try using Intel SSE4.1:   ],[$sse41support])
GCRY_MSG_SHOW([Try using DRNG (RDRAND):  ],[$drngsupport])
GCRY_MSG_SHOW([Try using Intel AVX:      ],[$avxsupport])
GCRY_MSG_SHOW([Try using Intel AVX2:     ],[$avx2support])
GCRY_MSG_SHOW([Try using ARM NEON:       ],[$neonsupport])
GCRY_MSG_SHOW([Try using ARMv8 crypto:   ],[$armcryptosupport])
GCRY_MSG_SHOW([],[])

if test "x${gpg_config_script_warn}" != x; then
cat <<G10EOF
        Mismatches between the target platform and the to
        be used libraries have been been detected for:
         ${gpg_config_script_warn}
        Please check above for warning messages.

G10EOF
fi

if test "$gcry_cv_gcc_attribute_aligned" != "yes" ; then
cat <<G10EOF
   Please not that your compiler does not support the GCC style
   aligned attribute. Using this software may evoke bus errors.

G10EOF
fi

if test -n "$gpl"; then
  echo "Please note that you are building a version of Libgcrypt with"
  echo "  $gpl"
  echo "included.  These parts are licensed under the GPL and thus the"
  echo "use of this library has to comply with the conditions of the GPL."
  echo ""
fi