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2009-09-03 Colin Watson <cjwatson@ubuntu.com>

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* 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.
This commit is contained in:
cjwatson 2009-09-03 23:00:25 +00:00
parent f79572cdd6
commit 77c55a8749
2 changed files with 25 additions and 0 deletions
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8
ChangeLog
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@ -1,3 +1,11 @@
2009-09-03 Colin Watson <cjwatson@ubuntu.com>
* 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.
2009-09-02 Yves BLUSSEAU <blusseau@zetam.org>
Embedding loadenv module into grub-emu

17
configure.ac
View file

@ -246,6 +246,23 @@ if test "x$TARGET_CFLAGS" = x; then
TARGET_CFLAGS="$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], [
SAVE_CFLAGS="$CFLAGS"
CFLAGS="$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])
CFLAGS="$SAVE_CFLAGS"
])
if test "x$grub_cv_cc_fno_dwarf2_cfi_asm" = xyes; then
TARGET_CFLAGS="$TARGET_CFLAGS -fno-dwarf2-cfi-asm"
fi
fi
grub_apple_target_cc