[PATCH] testsuite, asan: Avoid color in asan test output.

[Iain Sandoe via Gcc-patches]

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.

tested on x86_64 Darwin / Linux,
OK for master / backports?
thanks
Iain

Signed-off-by: Iain Sandoe <i...@sandoe.co.uk>

gcc/testsuite/ChangeLog:

        * lib/asan-dg.exp: Do not apply color to asan output when
        under test.
---
 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 7e0f85dc9b0..87c70d0bebb 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] {
-- 
2.24.3 (Apple Git-128)