On Sat, Dec 08, 2018 at 02:14:47PM +0100, Kirill Marinushkin wrote:
First problem: I cannot compile the kernel with my version of compiler
Second problem: when I disable the feature - it cannot take effect, because the parse-time error happens before `syncconfig`
On 12/08/18 13:42, Borislav Petkov wrote:
Does this help?
https://git.kernel.org/tip/25896d073d8a0403b07e6dec56f58e6c33678207
The patch which you mentioned fixes the second problem: now I can disable CONFIG_RETPOLINE. But, the first problem is still here: with defconfig and gcc v6.4.0, kernel doesn't build, with this message:
$ make scripts/kconfig/conf --syncconfig Kconfig You are building kernel with non-retpoline compiler. Please update your compiler. make: *** [arch/x86/Makefile:311: checkbin] Error 1I don't think that this is a proper behavior. I suggest to allow compilation
No, you asked for retpoline, and your compiler can not provide that, so erroring out is the correct behavior. It is worse for you to have an option enabled and it not being enabled just because your compiler does not support it. That way you do not have the false sense of security.
thanks,
greg k-h