--- a/build/unix/stdc++compat/Makefile.in
+++ b/build/unix/stdc++compat/Makefile.in
@@ -21,8 +21,9 @@ CPPSRCS = \
   stdc++compat.cpp
   $(NULL)
 
 HOST_CPPSRCS = $(CPPSRCS)
 
 include $(topsrcdir)/config/rules.mk
 
 CXXFLAGS += -DMOZ_LIBSTDCXX_VERSION=$(MOZ_LIBSTDCXX_TARGET_VERSION)
+HOST_CXXFLAGS += -DMOZ_LIBSTDCXX_VERSION=$(MOZ_LIBSTDCXX_TARGET_VERSION)

--- a/configure.in
+++ b/configure.in
@@ -333,38 +333,38 @@ else
     AC_PROG_CXX
     AC_PROG_RANLIB
     MOZ_PATH_PROGS(AS, $AS as, $CC)
     AC_CHECK_PROGS(AR, ar, :)
     AC_CHECK_PROGS(LD, ld, :)
     AC_CHECK_PROGS(STRIP, strip, :)
     AC_CHECK_PROGS(WINDRES, windres, :)
     if test -z "$HOST_CC"; then
-        HOST_CC='$(CC)'
+        HOST_CC="$CC"
     fi
     if test -z "$HOST_CFLAGS"; then
-        HOST_CFLAGS='$(CFLAGS)'
+        HOST_CFLAGS="$CFLAGS"
     fi
     if test -z "$HOST_CXX"; then
-        HOST_CXX='$(CXX)'
+        HOST_CXX="$CXX"
     fi
     if test -z "$HOST_CXXFLAGS"; then
-        HOST_CXXFLAGS='$(CXXFLAGS)'
+        HOST_CXXFLAGS="$CXXFLAGS"
     fi
     if test -z "$HOST_LDFLAGS"; then
-        HOST_LDFLAGS='$(LDFLAGS)'
+        HOST_LDFLAGS="$LDFLAGS"
     fi
     if test -z "$HOST_RANLIB"; then
-        HOST_RANLIB='$(RANLIB)'
+        HOST_RANLIB="$RANLIB"
     fi
     if test -z "$HOST_AR"; then
-        HOST_AR='$(AR)'
+        HOST_AR="$AR"
     fi
     if test -z "$HOST_AR_FLAGS"; then
-        HOST_AR_FLAGS='$(AR_FLAGS)'
+        HOST_AR_FLAGS="$AR_FLAGS"
     fi
 fi
 
 MOZ_TOOL_VARIABLES
 
 dnl ========================================================
 dnl Special win32 checks
 dnl ========================================================
@@ -8785,17 +8785,17 @@ mingw*)
     ;;
 esac
 
 AC_SUBST(PYTHON)
 
 # Populate the virtualenv
 AC_MSG_RESULT([Populating Python virtualenv])
 MACOSX_DEPLOYMENT_TARGET= LDFLAGS="${HOST_LDFLAGS}" \
-  CC="${CC}" CXX="${CXX}" \
+  CC="${HOST_CC}" CXX="${HOST_CXX}" \
   CFLAGS="${HOST_CFLAGS}" CXXFLAGS="${HOST_CXXFLAGS}" \
   $PYTHON $_topsrcdir/build/virtualenv/populate_virtualenv.py \
     $_topsrcdir $_topsrcdir/build/virtualenv/packages.txt \
   || exit 1
 
 dnl Load the list of Makefiles to generate.
 dnl   To add new Makefiles, edit allmakefiles.sh.
 dnl   allmakefiles.sh sets the variable, MAKEFILES.

--- a/other-licenses/bsdiff/Makefile.in
+++ b/other-licenses/bsdiff/Makefile.in
@@ -43,9 +43,9 @@ endif
 ifeq ($(HOST_OS_ARCH),WINNT)
 HOST_EXTRA_LIBS += $(call EXPAND_LIBNAME,Ws2_32)
 endif
 
 LOCAL_INCLUDES += -I$(topsrcdir)/toolkit/mozapps/update/updater
 
 include $(topsrcdir)/config/rules.mk
 
-CXXFLAGS += $(MOZ_BZ2_CFLAGS)
+HOST_CXXFLAGS += $(MOZ_BZ2_CFLAGS)</textarea>