[Bug target/68774] New: gcc should allow disabling markup in Xcode 7 assembler messages

["ro at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68774

            Bug ID: 68774
           Summary: gcc should allow disabling markup in Xcode 7 assembler
                    messages
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ro at gcc dot gnu.org
                CC: iains at gcc dot gnu.org, mrs at gcc dot gnu.org
  Target Milestone: ---
              Host: x86_64-apple-darwin15.2.0
            Target: x86_64-apple-darwin15.2.0
             Build: x86_64-apple-darwin15.2.0

While looking at PR target/68772, I noticed that the LLVM-based assembler in
Xcode 7
emits color markup by default, turning the testsuite log files close to
unreadable:

^[[1m/var/folders/1d/k16rgv6d5039jhvlj8_dzk4h00021y/T//cclVnbR6.s:1:9:
^[[0;1;31merror: ^[[0m^[[1munsupported directive '.stabs'
^[[0m        .stabs 
"/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.dg/debug/20020220-1.c",100,0,2,Ltext0
^[[0;1;32m                ^

There should be a way to disable that markup if at all possible.  On first
glance,
I didn't find anything in as(1), though.

  Rainer