I'd like to commit this for 1.97; it's important for users of recent distributions that use GCC 4.4 by default (which is the current release series of GCC). Otherwise, the core is too big to embed when using LVM and RAID (https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/423412). Any objections?
2009-09-03 Colin Watson <[email protected]> * configure.ac: By default, GCC 4.4 generates .eh_frame sections containing unwind information in some cases where it previously did not. Use -fno-dwarf2-cfi-asm if available to restore the old behaviour. See http://patchwork.kernel.org/patch/8555/ for related discussion. Index: configure.ac =================================================================== --- configure.ac (revision 2561) +++ configure.ac (working copy) @@ -246,6 +246,21 @@ TARGET_CFLAGS="$TARGET_CFLAGS -malign-jumps=1 -malign-loops=1 -malign-functions=1" fi fi + + # By default, GCC 4.4 generates .eh_frame sections containing unwind + # information in some cases where it previously did not. GRUB doesn't need + # these and they just use up vital space. Restore the old compiler + # behaviour. + AC_CACHE_CHECK([whether -fno-dwarf2-cfi-asm works], [grub_cv_cc_fno_dwarf2_cfi_asm], [ + CFLAGS="$CFLAGS -fno-dwarf2-cfi-asm" + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])], + [grub_cv_cc_fno_dwarf2_cfi_asm=yes], + [grub_cv_cc_fno_dwarf2_cfi_asm=no]) + ]) + + if test "x$grub_cv_cc_fno_dwarf2_cfi_asm" = xyes; then + TARGET_CFLAGS="$TARGET_CFLAGS -fno-dwarf2-cfi-asm" + fi fi grub_apple_target_cc -- Colin Watson [[email protected]] _______________________________________________ Grub-devel mailing list [email protected] http://lists.gnu.org/mailman/listinfo/grub-devel
