There was an error when build with gcc 4.7 (FC 17 64bit): | fs/zfs/zfs.c: In function 'get_filesystem_dnode': | fs/zfs/zfs.c:1449:7: error: dereferencing type-punned pointer will break strict-aliasing rules [-Werror=strict-aliasing] ...... cc1: all warnings being treated as errors
While compare the compile command between gcc 4.4.4 and gcc 4.7.0, they are the same (both of them have -Wall and -Werror), it seems that gcc 4.7.0 has changed its algorithm for the strict aliasing check, but I didn't find the related information from its release note. Add "-fno-strict-aliasing" to gcc's option would fix the problem, this would disable the optimization for strict-aliasing. [YOCTO #2291] Signed-off-by: Robert Yang <[email protected]> --- meta/recipes-bsp/grub/grub_1.99.bb | 7 ++++++- 1 files changed, 6 insertions(+), 1 deletions(-) diff --git a/meta/recipes-bsp/grub/grub_1.99.bb b/meta/recipes-bsp/grub/grub_1.99.bb index ac66e83..f45b634 100644 --- a/meta/recipes-bsp/grub/grub_1.99.bb +++ b/meta/recipes-bsp/grub/grub_1.99.bb @@ -12,7 +12,7 @@ LICENSE = "GPLv3" LIC_FILES_CHKSUM = "file://COPYING;md5=d32239bcb673463ab874e80d47fae504" RDEPENDS_${PN} = "diffutils freetype" -PR = "r3" +PR = "r4" SRC_URI = "ftp://ftp.gnu.org/gnu/grub/grub-${PV}.tar.gz \ file://grub-install.in.patch \ @@ -29,6 +29,11 @@ inherit gettext EXTRA_OECONF = "--with-platform=pc --disable-grub-mkfont --target=${TARGET_ARCH} --program-prefix=""" do_configure() { + # Fix build error for gcc 4.7 + echo "CPPFLAGS_DEFAULT += -fno-strict-aliasing" >> conf/Makefile.common + # Also modify Makefile.in, we can remove this when we can run autoreconf + sed -i 's/^CPPFLAGS_DEFAULT = \(.*\)/CPPFLAGS_DEFAULT = -fno-strict-aliasing \1/' \ + Makefile.in grub-core/Makefile.in oe_runconf } -- 1.7.1 _______________________________________________ Openembedded-core mailing list [email protected] http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core
