[PATCH] MC: Don't emit min version directives when -fno-integrated-as is on

[Rafael Espíndola]

On 22 January 2015 at 00:36, Nico Weber <thakis at chromium.org> wrote:
> I'm trying to use afl-fuzz with asan on OS X. afl-fuzz tells you to set CXX to afl-clang++ and rebuild your program. afl-clang++ then calls clang++ with -no-integrated-as and -B to a path with its own as wrapper that inserts some instrumentation assembly before calling real as. This doesn't work on OS X because clang++ writes this .macosx_version_min directive that as doesn't support. If I apply this patch, everything does work. So this seems like a useful thing to me – are there any downsides to this patch?

Yes, it puts us in a direction we really don't want to go.

On OS X /usr/bin/as is really old and not supported. If afl is using
it instead clang that is a bug in afl.

The correct way of making this easier would probably be to write a
program that is command line compatible with /usr/bin/as but uses MC.

Cheers,
Rafael