* Backport from upstream:

- Build with -fno-asynchronous-unwind-tables to save space (closes:
    #662787).
This commit is contained in:
Colin Watson 2012-03-06 12:45:20 +00:00
parent 6a33f10fb5
commit b34ed0e9b9
3 changed files with 42 additions and 0 deletions

8
debian/changelog vendored
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@ -1,3 +1,11 @@
grub2 (1.99-16) UNRELEASED; urgency=low
* Backport from upstream:
- Build with -fno-asynchronous-unwind-tables to save space (closes:
#662787).
-- Colin Watson <cjwatson@debian.org> Tue, 06 Mar 2012 12:44:38 +0000
grub2 (1.99-15) unstable; urgency=low
[ Adam Conrad ]

33
debian/patches/gcc_4_6_space.patch vendored Normal file
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@ -0,0 +1,33 @@
Description: Build with -fno-asynchronous-unwind-tables to save space
Author: Vladimir Serbinenko <phcoder@gmail.com>
Origin: upstream, http://bazaar.launchpad.net/~vcs-imports/grub/grub2-bzr/revision/3589
Last-Update: 2012-03-06
Index: b/configure.ac
===================================================================
--- a/configure.ac
+++ b/configure.ac
@@ -415,6 +415,23 @@
fi
fi
+# By default, GCC 4.6 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-asynchronous-unwind-tables works], [grub_cv_cc_fno_asynchronous_unwind_tables], [
+ SAVE_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS -fno-dwarf2-cfi-asm"
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
+ [grub_cv_cc_fno_asynchronous_unwind_tables=yes],
+ [grub_cv_cc_fno_asynchronous_unwind_tables=no])
+ CFLAGS="$SAVE_CFLAGS"
+])
+
+if test "x$grub_cv_cc_fno_asynchronous_unwind_tables" = xyes; then
+ TARGET_CFLAGS="$TARGET_CFLAGS -fno-asynchronous-unwind-tables"
+fi
+
grub_apple_target_cc
if test x$grub_cv_apple_target_cc = xyes ; then
TARGET_CPPFLAGS="$TARGET_CPPFLAGS -DAPPLE_CC=1"

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@ -35,3 +35,4 @@ handle_new_autotools.patch
efi_disk_cache.patch
bash-completion_identifiers.patch
mkconfig_gnumach.patch
gcc_4_6_space.patch