GCC error when compiling kernel

[sabina2]

Hi ! I tried to reinstall the 4.4.2 kernel with Grsecurity patch on my fresh Kubuntu. All works untill I try to compile the kernel with "sudo make deb-pkg", I got this :
Makefile:664: Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: -fstack-protector-strong not supported by compiler CHK include/config/kernel.release make clean CLEAN arch/x86/purgatory CLEAN arch/x86/tools CLEAN .tmp_versions TAR linux-4.4.2-grsec.tar.gz make KBUILD_SRC= Makefile:664: Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: -fstack-protector-strong not supported by compiler GENHASH tools/gcc/size_overflow_plugin/size_overflow_hash.h GENHASH tools/gcc/size_overflow_plugin/size_overflow_hash_aux.h GENHASH tools/gcc/size_overflow_plugin/disable_size_overflow_hash.h HOSTCXX -fPIC tools/gcc/size_overflow_plugin/insert_size_overflow_asm.o HOSTCXX -fPIC tools/gcc/size_overflow_plugin/intentional_overflow.o HOSTCXX -fPIC tools/gcc/size_overflow_plugin/remove_unnecessary_dup.o HOSTCXX -fPIC tools/gcc/size_overflow_plugin/size_overflow_debug.o HOSTCXX -fPIC tools/gcc/size_overflow_plugin/size_overflow_ipa.o HOSTCXX -fPIC tools/gcc/size_overflow_plugin/size_overflow_misc.o HOSTCXX -fPIC tools/gcc/size_overflow_plugin/size_overflow_plugin.o HOSTCXX -fPIC tools/gcc/size_overflow_plugin/size_overflow_plugin_hash.o HOSTCXX -fPIC tools/gcc/size_overflow_plugin/size_overflow_transform.o HOSTCXX -fPIC tools/gcc/size_overflow_plugin/size_overflow_transform_core.o HOSTLLD -shared tools/gcc/size_overflow_plugin/size_overflow_plugin.so HOSTCXX -fPIC tools/gcc/colorize_plugin.o HOSTCXX -fPIC tools/gcc/constify_plugin.o HOSTCXX -fPIC tools/gcc/initify_plugin.o HOSTCXX -fPIC tools/gcc/kernexec_plugin.o HOSTCXX -fPIC tools/gcc/latent_entropy_plugin.o GENSEED tools/gcc/randomize_layout_seed.h HOSTCXX -fPIC tools/gcc/randomize_layout_plugin.o HOSTLLD -shared tools/gcc/constify_plugin.so HOSTLLD -shared tools/gcc/kernexec_plugin.so HOSTLLD -shared tools/gcc/colorize_plugin.so HOSTLLD -shared tools/gcc/latent_entropy_plugin.so HOSTLLD -shared tools/gcc/initify_plugin.so HOSTLLD -shared tools/gcc/randomize_layout_plugin.so HOSTCC scripts/basic/fixdep HOSTCC scripts/basic/bin2c HOSTCC arch/x86/tools/relocs_32.o HOSTCC arch/x86/tools/relocs_64.o HOSTCC arch/x86/tools/relocs_common.o HOSTLD arch/x86/tools/relocs CHK include/config/kernel.release CHK include/generated/uapi/linux/version.h CHK include/generated/utsrelease.h CC arch/x86/purgatory/purgatory.o AS arch/x86/purgatory/stack.o AS arch/x86/purgatory/setup-x86_64.o CC arch/x86/purgatory/sha256.o AS arch/x86/purgatory/entry64.o CC arch/x86/purgatory/string.o LD arch/x86/purgatory/purgatory.ro BIN2C arch/x86/purgatory/kexec-purgatory.c CC kernel/bounds.s gcc: error: unrecognized command line option ‘-fstack-protector-strong’ make[3]: *** [kernel/bounds.s] Erreur 1 make[2]: *** [prepare0] Erreur 2 make[1]: *** [deb-pkg] Erreur 2 make: *** [deb-pkg] Erreur 2 I tried to upgrade my GCC but It still does not work. All was working well with 4.3.4 and 4.3.5-grsec then I resintalled my Kubuntu and tried to patch the 4.4.2 kernel with Grsecurity and got this error message. Do you know what to do to solve this "fstach-protector-strong" error with Ubuntu ? Thanks in advance !

[sabina2]

Auto-solved, by upgrading GCC to 4.9.3 and adding gcc-4.9-plugin.dev. But then next error appeared :
scripts/sign-file.c:23:30: fatal error: openssl/opensslv.h: Aucun fichier ou dossier de ce type #include ^ compilation terminated. make[3]: *** [scripts/sign-file] Erreur 1 make[2]: *** [scripts] Erreur 2 make[1]: *** [deb-pkg] Erreur 2 make: *** [deb-pkg] Erreur 2

[sabina2]

Auto-solved 2 : Installed libssl-dev and now it is working. Thanks for your attention ! :D

[Doug S]

The other option for the "stack protector" issue, is just to disable it:

scripts/config --disable CC_STACKPROTECTOR_STRONG
Note: The stack protector issue is as of kernel 4.4-rc1
Note: The libssl-dev required issue is as of kernel 4.3-rc1.