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configure: find options to force endian on MIPS

This commit is contained in:
Andrei Borzenkov 2015-10-14 00:42:14 +02:00 committed by Vladimir Serbinenko
parent be25d92196
commit a3645c1240
1 changed files with 41 additions and 4 deletions
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45
configure.ac
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@ -562,12 +562,12 @@ AC_COMPILE_IFELSE(
]])],
[grub_cv_cc_target_clang=no], [grub_cv_cc_target_clang=yes])])
if test x$target_cpu = xpowerpc; then
if test x$target_cpu = xpowerpc -o x$target_cpu = xmips; then
AC_CACHE_CHECK([for options to get big-endian compilation], grub_cv_target_cc_big_endian, [
grub_cv_target_cc_big_endian=no
for cand in "-target powerpc -Wl,-EB" "-target powerpc" \
"-target powerpc-linux-gnu -Wl,-EB" "-target powerpc-linux-gnu" \
"-mbig-endian"; do
for cand in "-target $target_cpu -Wl,-EB" "-target $target_cpu" \
"-target $target_cpu-linux-gnu -Wl,-EB" "-target $target_cpu-linux-gnu" \
"-EB" "-mbig-endian"; do
if test x"$grub_cv_target_cc_big_endian" != xno ; then
break
fi
@ -577,6 +577,8 @@ if test x$target_cpu = xpowerpc; then
#error still little endian
#endif
asm (".globl start; start:");
asm (".globl _start; _start:");
asm (".globl __start; __start:");
void __main (void);
void __main (void) {}
int main (void);
@ -595,6 +597,41 @@ int main (void);
TARGET_CPPFLAGS="$TARGET_CPPFLAGS $skip_linkflags"
TARGET_CCASFLAGS="$TARGET_CCASFLAGS $skip_linkflags"
TARGET_LDFLAGS="$TARGET_LDFLAGS $grub_cv_target_cc_big_endian"
elif test x$target_cpu = xmipsel; then
AC_CACHE_CHECK([for options to get little-endian compilation], grub_cv_target_cc_little_endian, [
grub_cv_target_cc_little_endian=no
for cand in "-target $target_cpu -Wl,-EL" "-target $target_cpu" \
"-target $target_cpu-linux-gnu -Wl,-EL" "-target $target_cpu-linux-gnu" \
"-EL"; do
if test x"$grub_cv_target_cc_little_endian" != xno ; then
break
fi
CFLAGS="$TARGET_CFLAGS $cand -Werror"
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#if defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && (__ORDER_BIG_ENDIAN__ == __BYTE_ORDER__)
#error still big endian
#endif
asm (".globl start; start:");
asm (".globl _start; _start:");
asm (".globl __start; __start:");
void __main (void);
void __main (void) {}
int main (void);
]], [[]])],
[grub_cv_target_cc_little_endian="$cand"], [])
done
])
if test x"$grub_cv_target_cc_little_endian" = xno ; then
AC_MSG_ERROR([could not force little-endian])
fi
skip_linkflags="$(echo "$grub_cv_target_cc_little_endian"|sed 's@-Wl,-EL@@')"
TARGET_CFLAGS="$TARGET_CFLAGS $skip_linkflags"
TARGET_CPPFLAGS="$TARGET_CPPFLAGS $skip_linkflags"
TARGET_CCASFLAGS="$TARGET_CCASFLAGS $skip_linkflags"
TARGET_LDFLAGS="$TARGET_LDFLAGS $grub_cv_target_cc_little_endian"
fi
# GRUB code is N32-compliant but it's experimental and we would prefer to