On 31 January 2017 at 13:44, Rei Y. wrote: > From 2.22, glibc added libmvec and, as I understood it inspecting the > executables, gcc emits code that requires it when certain > optimizations are turned on* and the host libc supports mathvec. > Executables compiled in such a way cannot be linked, at runtime, with > older versions of glibc as they obviously lack libmvec. Since I cannot > recompile the user's glibc (with --disable-mathvec) and that some > distros, debian stable in particular, still ship with pre-2.22 glibc, > there should be a way to disable that behavior from gcc without having > to setup a whole environment and toolchain with an older glibc. If you want executables that will run with an older glibc then that's what you need to do.
