https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70831
--- Comment #12 from JD <t at sharklasers dot com> --- My CPU is Intel Core i7-4800MQ, but I realized my report was misleading. I get that same error with LDFLAGS=-flto CXXFLAGS=-flto CFLAGS=-flto which results in "CFLAGS=-g -O2 -flto" "CXXFLAGS=-g -O2 -flto -D_GNU_SOURCE" "CFLAGS_FOR_BUILD=-flto" "CFLAGS_FOR_TARGET=-g -O2 -flto" and $gcc-6.3.0/configure --prefix=/home/local/gcc-6.3.0lto --enable-languages=c --with-build-config=bootstrap-lto --disable-multilib and the error is in Makefile:369: recipe for target 'libmpxwrappers.la' failed