Hi there!
I updated my ~amd64 system recently to new hardware (Intel Core i3-4160).
Since then valgrind did no longer work for 32bit programs because
"-march=native" did choose instructions that valgrind does not support
in 32bit mode (even ld.so was unusable).
After some research I put this into make.conf and now it works:
CFLAGS_x86="${CFLAGS_x86} -mno-avx2 -mno-sse4 -mno-bmi -mno-bmi2"
CXXFLAGS_x86="${CXXFLAGS_x86} -mno-avx2 -mno-sse4 -mno-bmi -mno-bmi2"
Is this the best solution to the problem?
If yes, the valgrind ebuild could suggest something like this.
Either always show it or check cpu-flags first (is this maintainable?).
Regards
Matthias
