On Mon, Oct 03, 2016 at 11:06:13AM +0200, Mason wrote > It does look like 'atom' and 'bonnell' are similar. > > I don't have 4.9 handy, try this: > > echo | gcc -xc -S -fverbose-asm -march=atom -o v1.s - > echo | gcc -xc -S -fverbose-asm -march=bonnell -o v2.s - > diff -u v1.s v2.s > > Maybe they are identical? Thanks for the idea. I had to do it a bit differently to get it to work. I took a simple "Hello World" program, and ran... gcc -xc -S -fverbose-asm -march=atom -o v1.s hello.c gcc -xc -S -fverbose-asm -march=bonnell -o v2.s hello.c [i660][waltdnes][~/.x] diff -s v1.s v2.s 5c5 < # options passed: hello.c -march=atom -auxbase-strip v1.s -fverbose-asm --- > # options passed: hello.c -march=bonnell -auxbase-strip v2.s -fverbose-asm They appear to be identical, right down to the assembler level. But when an option becomes "undocumented", it can be removed without notice. I'll play it safe and go with "-march=bonnell". -- Walter Dnes <waltdnes@xxxxxxxxxxxx>
