gcc: fix check for target libc ssp support
gcc uses hardcoded path "${with-build-sysroot}/usr/include" to check target libc ssp support. Based on GLIBC version strings in features.h in that search path, gcc knows whether target (e)glibc implements stack protector itself. However this breaks meta-toolchain, which actually has target libc headers installed under {with-build-sysroot}/opt/... This way features.h is not found and thus gcc-crosssdk-intermediate thinks that target (e)glibc doesn't support ssp. Later when building eglibc-nativesdk, undefined reference to "__stack_chk_guard" occurs which was caused by: o eglibc do_configure found that gcc-crosssdk-intermediate supports ssp, and thus enable -fstack-protector for nscd o eglibc itself supports stack smash proctection for some architectures such as i386, x86-64, etc. It's expected to use its own method to provide stack protection, instead of relying on gcc. So eglibc rtld.os doesn't export __stack_chk_guard to other modules o then when installing nscd objects, gcc-crosssdk-intermediate sees the flag "-fstack-protector", while it thought this eglibc doesn't implement ssp itself, so gcc turns to the alternative to find a valid __stack_chk_guard exported. eglibc doesn'g export it, while gcc-crosssdk-intermediate itself disables libssp. Then the undefined reference happens. If enabling libssp for gcc-crosssdk- intermediate, it may also work-around this issue. But the ideal fix is still to replace hard coded path with the actual one where target libc gets installed. glibc-nativesdk doesn't encounter this issue because it thinks gcc doesn't support ssp, and thus doesn't enable "-fstack-protector" for nscd. Don't know the reason yet This fix [BUGID #366] Signed-off-by: Dexuan Cui <dexuan.cui@intel.com> Signed-off-by: Kevin Tian <kevin.tian@intel.com>
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@ -87,6 +87,10 @@ do_configure () {
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export ARCH_FLAGS_FOR_TARGET="${ARCH_FLAGS_FOR_TARGET}"
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(cd ${S} && gnu-configize) || die "failure running gnu-configize"
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# teach gcc to find correct target includedir when checking libc ssp support
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sed -i 's:^\([ ]*\)glibc_header_dir=\"${with_build_sysroot}/usr/include\":\1glibc_header_dir=\"${with_build_sysroot}${SYSTEMHEADERS}\":g' ${S}/gcc/configure.ac
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sed -i 's:^\([ ]*\)glibc_header_dir=\"${with_build_sysroot}/usr/include\":\1glibc_header_dir=\"${with_build_sysroot}${SYSTEMHEADERS}\":g' ${S}/gcc/configure
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# splice our idea of where the headers live into gcc's world
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echo "NATIVE_SYSTEM_HEADER_DIR = ${SYSTEMHEADERS}" > ${T}/t-oe
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sed 's%^tmake_file=.*$%& ${T}/t-oe%' < ${S}/gcc/Makefile.in >${S}/gcc/Makefile.in.new
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@ -5,7 +5,7 @@ require gcc-cross-canadian.inc
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require gcc-configure-sdk.inc
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require gcc-package-sdk.inc
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PR = "r9"
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PR = "r10"
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DEPENDS += "gmp-nativesdk mpfr-nativesdk libmpc-nativesdk elfutils-nativesdk"
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RDEPENDS_${PN} += "mpfr-nativesdk libmpc-nativesdk elfutils-nativesdk"
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@ -1,5 +1,5 @@
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require gcc-cross_${PV}.bb
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require gcc-cross-initial.inc
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PR = "r9"
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PR = "r10"
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@ -1,4 +1,4 @@
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require gcc-cross_${PV}.bb
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require gcc-cross-intermediate.inc
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PR = "r9"
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PR = "r10"
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@ -1,4 +1,4 @@
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PR = "r10"
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PR = "r11"
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require gcc-${PV}.inc
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require gcc-cross4.inc
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@ -1,4 +1,4 @@
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require gcc-cross-initial_${PV}.bb
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require gcc-crosssdk-initial.inc
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PR = "r9"
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PR = "r10"
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@ -1,4 +1,4 @@
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require gcc-cross-intermediate_${PV}.bb
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require gcc-crosssdk-intermediate.inc
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PR = "r9"
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PR = "r10"
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@ -1,4 +1,4 @@
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require gcc-cross_${PV}.bb
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require gcc-crosssdk.inc
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PR = "r9"
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PR = "r10"
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@ -1,4 +1,4 @@
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PR = "r9"
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PR = "r10"
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require gcc-${PV}.inc
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require gcc-configure-runtime.inc
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@ -1,4 +1,4 @@
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PR = "r9"
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PR = "r10"
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require gcc-${PV}.inc
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require gcc-configure-target.inc
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