--- a/aclocal.m4
+++ b/aclocal.m4
@@ -3,17 +3,16 @@ dnl Local autoconf macros used with mozi
 dnl The contents of this file are under the Public Domain.
 dnl
 
 builtin(include, build/autoconf/hotfixes.m4)dnl
 builtin(include, build/autoconf/acwinpaths.m4)dnl
 builtin(include, build/autoconf/hooks.m4)dnl
 builtin(include, build/autoconf/config.status.m4)dnl
 builtin(include, build/autoconf/toolchain.m4)dnl
-builtin(include, build/autoconf/ccache.m4)dnl
 builtin(include, build/autoconf/wrapper.m4)dnl
 builtin(include, build/autoconf/nspr.m4)dnl
 builtin(include, build/autoconf/nspr-build.m4)dnl
 builtin(include, build/autoconf/nss.m4)dnl
 builtin(include, build/autoconf/pkg.m4)dnl
 builtin(include, build/autoconf/codeset.m4)dnl
 builtin(include, build/autoconf/altoptions.m4)dnl
 builtin(include, build/autoconf/mozprog.m4)dnl

deleted file mode 100644
--- a/build/autoconf/ccache.m4
+++ /dev/null
@@ -1,36 +0,0 @@
-dnl This Source Code Form is subject to the terms of the Mozilla Public
-dnl License, v. 2.0. If a copy of the MPL was not distributed with this
-dnl file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-dnl ======================================================
-dnl = Enable compiling with ccache
-dnl ======================================================
-AC_DEFUN([MOZ_CHECK_CCACHE],
-[
-MOZ_ARG_WITH_STRING(ccache,
-[  --with-ccache[=path/to/ccache]
-                          Enable compiling with ccache],
-    CCACHE=$withval, CCACHE="no")
-
-if test "$CCACHE" != "no"; then
-    if test -z "$CCACHE" -o "$CCACHE" = "yes"; then
-        CCACHE=
-    else
-        if test ! -e "$CCACHE"; then
-            AC_MSG_ERROR([$CCACHE not found])
-        fi
-    fi
-    MOZ_PATH_PROGS(CCACHE, $CCACHE ccache)
-    if test -z "$CCACHE" -o "$CCACHE" = ":"; then
-        AC_MSG_ERROR([ccache not found])
-    elif test -x "$CCACHE"; then
-        CC="$CCACHE $CC"
-        CXX="$CCACHE $CXX"
-        MOZ_USING_CCACHE=1
-    else
-        AC_MSG_ERROR([$CCACHE is not executable])
-    fi
-fi
-
-AC_SUBST(MOZ_USING_CCACHE)
-])

--- a/build/autoconf/nspr-build.m4
+++ b/build/autoconf/nspr-build.m4
@@ -192,16 +192,21 @@ AC_SUBST(NSPR_PKGCONF_CHECK)
 fi # _IS_OUTER_CONFIGURE
 
 ])
 
 AC_DEFUN([MOZ_SUBCONFIGURE_NSPR], [
 
 if test -z "$MOZ_NATIVE_NSPR"; then
     ac_configure_args="$_SUBDIR_CONFIG_ARGS --with-dist-prefix=$MOZ_BUILD_ROOT/dist --with-mozilla"
+    if test -n "$MOZ_USING_CCACHE"; then
+        # Avoid double prepending ccache by omitting --with-ccache in building NSPR.
+        ac_configure_args="`echo $ac_configure_args | sed -e 's/--with-ccache[[^ ]]*//'`"
+    fi
+
     if test -z "$MOZ_DEBUG"; then
         ac_configure_args="$ac_configure_args --disable-debug"
     else
         ac_configure_args="$ac_configure_args --enable-debug"
         if test -n "$MOZ_NO_DEBUG_RTL"; then
             ac_configure_args="$ac_configure_args --disable-debug-rtl"
         fi
     fi

--- a/build/autoconf/wrapper.m4
+++ b/build/autoconf/wrapper.m4
@@ -7,16 +7,46 @@ dnl = Enable compiling with various comp
 dnl =======================================================================
 AC_DEFUN([MOZ_CHECK_COMPILER_WRAPPER],
 [
 MOZ_ARG_WITH_STRING(compiler_wrapper,
 [  --with-compiler-wrapper[=path/to/wrapper]
     Enable compiling with wrappers such as distcc and ccache],
     COMPILER_WRAPPER=$withval, COMPILER_WRAPPER="no")
 
+MOZ_ARG_WITH_STRING(ccache,
+[  --with-ccache[=path/to/ccache]
+                          Enable compiling with ccache],
+    CCACHE=$withval, CCACHE="no")
+
+if test "$CCACHE" != "no"; then
+    if test -z "$CCACHE" -o "$CCACHE" = "yes"; then
+        CCACHE=
+    else
+        if test ! -e "$CCACHE"; then
+            AC_MSG_ERROR([$CCACHE not found])
+        fi
+    fi
+    MOZ_PATH_PROGS(CCACHE, $CCACHE ccache)
+    if test -z "$CCACHE" -o "$CCACHE" = ":"; then
+        AC_MSG_ERROR([ccache not found])
+    elif test -x "$CCACHE"; then
+        if test "$COMPILER_WRAPPER" != "no"; then
+            COMPILER_WRAPPER="$CCACHE $COMPILER_WRAPPER"
+        else
+            COMPILER_WRAPPER="$CCACHE"
+        fi
+        MOZ_USING_CCACHE=1
+    else
+        AC_MSG_ERROR([$CCACHE is not executable])
+    fi
+fi
+
+AC_SUBST(MOZ_USING_CCACHE)
+
 if test "$COMPILER_WRAPPER" != "no"; then
     case "$target" in
     *-mingw*)
         dnl When giving a windows path with backslashes, js/src/configure
         dnl fails because of double wrapping because the test further below
         dnl doesn't work with backslashes. While fixing that test to work
         dnl might seem better, a lot of the make build backend actually
         dnl doesn't like backslashes, so normalize windows paths to use

--- a/configure.in
+++ b/configure.in
@@ -7322,18 +7322,16 @@ dnl ====================================
 MOZ_ARG_ENABLE_BOOL(gczeal,
 [  --enable-gczeal         Enable zealous JavaScript GCing],
     JS_GC_ZEAL=1,
     JS_GC_ZEAL= )
 if test -n "$JS_GC_ZEAL" -o -n "$MOZ_DEBUG"; then
     AC_DEFINE(JS_GC_ZEAL)
 fi
 
-MOZ_CHECK_CCACHE
-
 dnl ========================================================
 dnl = Enable static checking using gcc-dehydra
 dnl ========================================================
 
 MOZ_ARG_WITH_STRING(static-checking,
 [  --with-static-checking=path/to/gcc_dehydra.so
                           Enable static checking of code using GCC-dehydra],
     DEHYDRA_PATH=$withval,
@@ -9187,21 +9185,16 @@ if test -n "$_subconfigure_subdir"; then
   srcdir="$_save_srcdir"
 fi
 
 # No need to run subconfigures when building with LIBXUL_SDK_DIR
 if test "$COMPILE_ENVIRONMENT" -a -z "$LIBXUL_SDK_DIR"; then
 
 export WRAP_LDFLAGS
 
-if test -n "$MOZ_USING_CCACHE"; then
-    # Avoid double prepending ccache by omitting --with-ccache in building NSPR.
-    _SUBDIR_CONFIG_ARGS="`echo $_SUBDIR_CONFIG_ARGS | sed -e 's/--with-ccache[[^ ]]*//'`"
-fi
-
 MOZ_SUBCONFIGURE_NSPR()
 
 dnl ========================================================
 dnl = Setup a nice relatively clean build environment for
 dnl = sub-configures.
 dnl ========================================================
 CC="$_SUBDIR_CC"
 CXX="$_SUBDIR_CXX"

--- a/js/src/aclocal.m4
+++ b/js/src/aclocal.m4
@@ -3,17 +3,16 @@ dnl Local autoconf macros used with mozi
 dnl The contents of this file are under the Public Domain.
 dnl
 
 builtin(include, ../../build/autoconf/hotfixes.m4)dnl
 builtin(include, ../../build/autoconf/acwinpaths.m4)dnl
 builtin(include, ../../build/autoconf/hooks.m4)dnl
 builtin(include, ../../build/autoconf/config.status.m4)dnl
 builtin(include, ../../build/autoconf/toolchain.m4)dnl
-builtin(include, ../../build/autoconf/ccache.m4)dnl
 builtin(include, ../../build/autoconf/wrapper.m4)dnl
 builtin(include, ../../build/autoconf/pkg.m4)dnl
 builtin(include, ../../build/autoconf/nspr.m4)dnl
 builtin(include, ../../build/autoconf/nspr-build.m4)dnl
 builtin(include, ../../build/autoconf/codeset.m4)dnl
 builtin(include, ../../build/autoconf/altoptions.m4)dnl
 builtin(include, ../../build/autoconf/mozprog.m4)dnl
 builtin(include, ../../build/autoconf/mozheader.m4)dnl

--- a/js/src/configure.in
+++ b/js/src/configure.in
@@ -3437,18 +3437,16 @@ MOZ_ARG_ENABLE_BOOL(oom-breakpoint,
 [  --enable-oom-breakpoint
                           Enable a breakpoint function for artificial OOMs],
     JS_OOM_BREAKPOINT=1,
     JS_OOM_BREAKPOINT= )
 if test -n "$JS_OOM_BREAKPOINT"; then
     AC_DEFINE(JS_OOM_BREAKPOINT)
 fi
 
-MOZ_CHECK_CCACHE
-
 dnl ========================================================
 dnl = Enable static checking using gcc-dehydra
 dnl ========================================================
 
 MOZ_ARG_WITH_STRING(static-checking,
 [  --with-static-checking=path/to/gcc_dehydra.so
                           Enable static checking of code using GCC-dehydra],
     DEHYDRA_PATH=$withval,