[gcc r11-11392] testsuite, asan: Avoid color in asan test output.

[Iain D Sandoe <iains@gcc.gnu.org>]

https://gcc.gnu.org/g:57596bb82e31d2dfdba2eb41c16e45a9bbeb38a7

commit r11-11392-g57596bb82e31d2dfdba2eb41c16e45a9bbeb38a7
Author: Iain Sandoe <iain@sandoe.co.uk>
Date:   Sun Jun 19 10:31:01 2022 +0100

    testsuite, asan: Avoid color in asan test output.
    
    The presence of the color markers in the some of the asan tests
    appears to confuse the dg-output matching (possibly a platform
    TCL or termios bug) on some Darwin platforms.
    
    Since the color is not being tested, switch it off (makes the log
    files easier to read too).  This fixes a large number of spurious
    test fails on AVX512 Darwin19.
    
    Signed-off-by: Iain Sandoe <iain@sandoe.co.uk>
    
    gcc/testsuite/ChangeLog:
    
            * lib/asan-dg.exp: Do not apply color to asan output when
            under test.
    
    (cherry picked from commit 607118dfa47a1865dc59f98e7d161da98471d688)

Diff:
---
 gcc/testsuite/lib/asan-dg.exp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/gcc/testsuite/lib/asan-dg.exp b/gcc/testsuite/lib/asan-dg.exp
index e926dc3ad03..954b0ae22d4 100644
--- a/gcc/testsuite/lib/asan-dg.exp
+++ b/gcc/testsuite/lib/asan-dg.exp
@@ -111,6 +111,8 @@ proc asan_init { args } {
     global asan_saved_TEST_ALWAYS_FLAGS
     global asan_saved_ALWAYS_CXXFLAGS
 
+    setenv ASAN_OPTIONS "color=never"
+
     set link_flags ""
     if ![is_remote host] {
 	if [info exists TOOL_OPTIONS] {