https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118981
--- Comment #21 from Xi Ruoyao <xry111 at gcc dot gnu.org> --- (In reply to Erich Löw from comment #16) > In parallel: how did I come to "CCFLAGS=-pipe -march=native -O2 -fPIC > -fomit-frame-pointer"? > --> They are from linux kernel compiling This is not correct. The current kernel building system ignores any custom CFLAGS. And "-march=native" or "-fPIC" are just not suitable for the kernel, if you forcefully inject them into a kernel build the kernel will most likely just fail to boot.
