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check support for gcc flag -mstackrealign before using it

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This commit is contained in:
Miguel Freitas 2014-07-21 18:36:58 -03:00
parent b09ad3e4c4
commit 81b24c01c7
1 changed files with 23 additions and 1 deletions
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24
configure.ac
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@ -127,6 +127,27 @@ case $host in
;;
esac
###############################################################################
# macro to check for specifig gcc flag support
###############################################################################
AC_DEFUN([CHECK_CXXFLAG], [
old_CXXFLAGS=$CXXFLAGS
CXXFLAGS="$CXXFLAGS $1 -Werror"
AC_COMPILE_IFELSE([[
#include <stdio.h>
int main(int argc, char **argv)
{
printf("test cxxflags, argc:%d argv[0]:%s", argc, argv[0]);
return 0;
}
]],
[check_cxxflag=yes],
[check_cxxflag=no])
CXXFLAGS="$old_CXXFLAGS"
if test "x$check_cxxflag" = "xyes"; then
CXXFLAGS="$CXXFLAGS $1"
fi
])
###############################################################################
# Checking for needed base libraries
@ -531,7 +552,8 @@ AS_CASE(["$ARG_ENABLE_SSE2"],
["yes"|"on"], [
AC_MSG_RESULT([yes])
AC_DEFINE([USE_SSE2],[1],[Enable SSE2])
CXXFLAGS="$CXXFLAGS -DUSE_SSE2 -msse2 -mstackrealign "
CXXFLAGS="$CXXFLAGS -DUSE_SSE2 -msse2 "
CHECK_CXXFLAG([-mstackrealign])
],
["no"|"off"], [
AC_MSG_RESULT([no])