On Tue, Jul 9, 2019 at 10:56 PM Denis Kirjanov <kirjanov@xxxxxxxxx> wrote: > > > > On Tuesday, July 9, 2019, Muni Sekhar <munisekharrms@xxxxxxxxx> wrote: >> >> Hi All, >> >> >> My Kernel is built with the following options: >> >> >> >> CONFIG_CC_STACKPROTECTOR=y >> >> CONFIG_CC_STACKPROTECTOR_STRONG=y >> >> >> >> >> >> We use out-of-tree kernel modules in our project and I need to measure the performance of it by using a bit older gcc version 4.8.5. >> >> >> >> I can build the modules with gcc above 5 version, but when I try to use gcc version 4.8.5 I’m getting the following error: >> >> >> >> Makefile:693: Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: -fstack-protector-strong not supported by compiler >> >> >> >> So it looks like gcc 4.8.5 does not support CONFIG_CC_STACKPROTECTOR_STRONG option, but how to instruct gcc to ignore this one? >> >> >> >> In runtime, is it possible to instruct kernel to ignore “CONFIG_CC_STACKPROTECTOR_STRONG=y” (without building the kernel) by using sysctl or any other method? >> >> > > > Just disable it in your .config file I disabled in /lib/modules/$(uname -r)/build/.config, but still get that error. Does kernel needs to be recompiled? CONFIG_CC_STACKPROTECTOR=y # CONFIG_CC_STACKPROTECTOR_NONE is not set # CONFIG_CC_STACKPROTECTOR_REGULAR is not set # CONFIG_CC_STACKPROTECTOR_STRONG is not set > > >> >> Any help is appreciated. >> >> >> >> -- >> Thanks, >> Sekhar > > > > -- > Regards / Mit besten Grüßen, > Denis > -- Thanks, Sekhar _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
