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Don't add -mflush-func if it's not supported by compiler.

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This commit is contained in:
Vladimir Serbinenko 2013-11-23 12:40:44 +01:00
parent 1bba40f578
commit f93ddcfd1c
3 changed files with 19 additions and 3 deletions
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15
configure.ac
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@ -520,6 +520,21 @@ if test "x$grub_cv_cc_target_clang" = xno && test "x$target_cpu" = xi386 && test
TARGET_CFLAGS="$TARGET_CFLAGS -mrtd -mregparm=3"
fi
# on mips redirect cache flushing function to non-existant one.
if test "x$target_cpu" = xmips || test "x$target_cpu" = xmipsel ; then
AC_CACHE_CHECK([whether -mflush-func=grub_red_herring works], [grub_cv_cc_mflush_func], [
CFLAGS="$TARGET_CFLAGS -mflush-func=grub_red_herring -Werror"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
[grub_cv_cc_mflush_func=yes],
[grub_cv_cc_mflush_func=no])
])
if test "x$grub_cv_cc_mflush_func" = xyes; then
TARGET_CFLAGS="$TARGET_CFLAGS -mflush-func=grub_red_herring"
fi
fi
# Force no alignment to save space on i386.
if test "x$target_cpu" = xi386; then
AC_CACHE_CHECK([whether -falign-loops works], [grub_cv_cc_falign_loop], [