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Bug 1142352 - Add a configure test for the gcc version of the host compiler when cross compiling. r=glandium

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The duplication of the code higher up is a little bit annoying, but I
don't see an easy way to avoid that.  It's also still quite far from
duplicating everything.

I tested locally with a Fennec build that if I bump the requirement from
4.6 to 4.9, I get the expected build error.
This commit is contained in:
L. David Baron 2015-03-12 23:28:55 -07:00 committed by Mike Hommey
parent f5417e49c7
commit d8cc8345c2
1 changed files with 26 additions and 3 deletions
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29
build/autoconf/toolchain.m4
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@ -223,14 +223,37 @@ if test -n "$CROSS_COMPILE"; then
dnl When cross compile, we have no variable telling us what the host compiler is. Figure it out.
cat > conftest.C <<EOF
#if defined(__clang__)
CLANG
COMPILER CLANG __clang_major__.__clang_minor__.__clang_patchlevel__
#elif defined(__GNUC__)
GCC
COMPILER GCC __GNUC__.__GNUC_MINOR__.__GNUC_PATCHLEVEL__
#endif
EOF
host_compiler=`$HOST_CXX -E conftest.C | egrep '(CLANG|GCC)'`
read dummy host_compiler HOST_CC_VERSION <<EOF
$($HOST_CC -E conftest.C 2>/dev/null | grep COMPILER)
EOF
read dummy host_cxxcompiler HOST_CXX_VERSION <<EOF
$($HOST_CXX -E conftest.C 2>/dev/null | grep COMPILER)
EOF
rm conftest.C
if test "$host_compiler" != "$host_cxxcompiler"; then
AC_MSG_ERROR([Your C and C++ host compilers are different. You need to use the same compiler.])
fi
if test -n "$host_compiler"; then
if test "$host_compiler" = "GCC" ; then
changequote(<<,>>)
HOST_GCC_VERSION_FULL="$HOST_CXX_VERSION"
HOST_GCC_VERSION=`echo "$HOST_GCC_VERSION_FULL" | $PERL -pe '(split(/\./))[0]>=4&&s/(^\d*\.\d*).*/<<$>>1/;'`
HOST_GCC_MAJOR_VERSION=`echo ${HOST_GCC_VERSION} | $AWK -F\. '{ print <<$>>1 }'`
HOST_GCC_MINOR_VERSION=`echo ${HOST_GCC_VERSION} | $AWK -F\. '{ print <<$>>2 }'`
changequote([,])
if test "$HOST_GCC_MAJOR_VERSION" -eq 4 -a "$HOST_GCC_MINOR_VERSION" -lt 7 ||
test "$HOST_GCC_MAJOR_VERSION" -lt 4; then
AC_MSG_ERROR([Only GCC 4.7 or newer supported for host compiler])
fi
fi
HOST_CXXFLAGS="$HOST_CXXFLAGS -std=gnu++0x"
_SAVE_CXXFLAGS="$CXXFLAGS"