Re: [uclibc-ng-devel] compile uclibc with retpoline switch

Hi all, With Spectre variant 2 (CVE-2017-5715), gcc has been updated to avoid branch prediction problems via the retpoline patch. Specifically, by using either – mindirect-branch=thunk-inline or –mindirect-branch=thunk or –mindirect-branch- thunk-external, the compiler will convert indirect branches and function returns to call and return thunks thus avoiding speculative execution in those cases. Of course, there is a performance penalty depending on the exact argument used. Has anyone compiled uclibc with one of those switches?