https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100347
--- Comment #17 from Iain Sandoe <iains at gcc dot gnu.org> --- to complete the set: /src-local/gcc-master/configure --prefix=/opt/iains/x86_64-apple-darwin20/gcc-12-0-0 --build=x86_64-apple-darwin20 --with-sysroot=/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk --enable-languages=all CC=x86_64-apple-darwin20-gcc CXX=x86_64-apple-darwin20-g++ --with-cpu=native $ ./gcc/xgcc -Bgcc /source/test/general/empty-main.c -S -fverbose-asm $ head -5 empty-main.s # GNU C17 (GCC) version 12.0.0 20210508 (experimental) [master revision r12-637-g56103737f173] (x86_64-apple-darwin20) # compiled by GNU C version 12.0.0 20210508 (experimental) [master revision r12-637-g56103737f173], GMP version 6.2.0, MPFR version 4.1.0, MPC version 1.1.0, isl version isl-0.22-GMP # GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096 # options passed: --param=l1-cache-size=32 --param=l1-cache-line-size=64 --param=l2-cache-size=9216 -mtune=skylake -fPIC -mmacosx-version-min=11.2.0 Which shows that the '--with-cpu=native' configuration option has also picked up the right info (and overridden the default core2). This is a bootstrap using gcc.
