On Tuesday, July 9, 2019, Muni Sekhar <[email protected]> wrote:
> On Tue, Jul 9, 2019 at 10:56 PM Denis Kirjanov <[email protected]> wrote: > > > > > > > > On Tuesday, July 9, 2019, Muni Sekhar <[email protected]> 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 > > You have to disable it in your kernel source directory and then run ‘make oldconfig’ > > > > > >> > >> Any help is appreciated. > >> > >> > >> > >> -- > >> Thanks, > >> Sekhar > > > > > > > > -- > > Regards / Mit besten Grüßen, > > Denis > > > > > -- > Thanks, > Sekhar > -- Regards / Mit besten Grüßen, Denis
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