A working grub cannot be built with upcoming binutils and gcc, because linker relaxation was added [1] causing new unsupported relocations to appear in modules.
So we pass -mno-relax to gcc if it is supported, to disable relaxation and make grub forward-compatible with new toolchains. [1]: https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=56576f4a722b7398d35802ecf7d4185c27d6d69b Signed-off-by: Xiaotian Wu <wuxiaot...@loongson.cn> --- configure.ac | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/configure.ac b/configure.ac index d9f088d12..a0ea5beae 100644 --- a/configure.ac +++ b/configure.ac @@ -874,6 +874,29 @@ if test "x$target_cpu" = xloongarch64; then TARGET_CFLAGS="$TARGET_CFLAGS -mno-explicit-relocs -fno-plt" TARGET_CCASFLAGS="$TARGET_CCASFLAGS -mno-explicit-relocs -fno-plt" fi + + AC_CACHE_CHECK([for no-relax options], grub_cv_target_cc_mno_relax, [ + grub_cv_target_cc_mno_relax=no + for cand in "-mno-relax" "-Wa,-mno-relax"; do + if test x"$grub_cv_target_cc_mno_relax" != xno ; then + break + fi + CFLAGS="$TARGET_CFLAGS $cand -Werror" + AC_LINK_IFELSE([AC_LANG_PROGRAM([[ + asm (".globl start; start:"); + void __main (void); + void __main (void) {} + int main (void); + ]], [[]])], [grub_cv_target_cc_mno_relax="$cand"], []) + done + ]) + CFLAGS="$TARGET_CFLAGS" + + if test x"$grub_cv_target_cc_mno_relax" != xno ; then + TARGET_CFLAGS="$TARGET_CFLAGS $grub_cv_target_cc_mno_relax" + TARGET_CCASFLAGS="$TARGET_CCASFLAGS $grub_cv_target_cc_mno_relax" + fi + TARGET_CFLAGS="$TARGET_CFLAGS -Wa,-mla-global-with-abs" TARGET_CCASFLAGS="$TARGET_CCASFLAGS -Wa,-mla-global-with-abs" fi -- 2.40.1 _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org https://lists.gnu.org/mailman/listinfo/grub-devel
