[gcc r9-8327] Darwin, libsanitizer: Update minimum supported system version.

[Iain D Sandoe]

https://gcc.gnu.org/g:224ca3bfe8cf1c1a530dedde9e007a38d4d04f30

commit r9-8327-g224ca3bfe8cf1c1a530dedde9e007a38d4d04f30
Author: Iain Sandoe <iain@sandoe.co.uk>
Date:   Tue Mar 3 10:17:15 2020 +0000

    Darwin, libsanitizer: Update minimum supported system version.
    
    The imported sources from 'upstream' do not support Darwin10
    or earlier, so do not enable these by default.

Diff:
---
 libsanitizer/ChangeLog     | 6 ++++++
 libsanitizer/configure.tgt | 2 +-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/libsanitizer/ChangeLog b/libsanitizer/ChangeLog
index e96f13b..53b8343 100644
--- a/libsanitizer/ChangeLog
+++ b/libsanitizer/ChangeLog
@@ -1,3 +1,9 @@
+2020-03-03  Iain Sandoe  <iain@sandoe.co.uk>
+
+	* configure.tgt (x86_64-*-darwin*, i?86-*-darwin*): Enable by
+	default only for Darwin versions greater than equal to 11
+	(macOS 10.7).
+
 2019-12-20  Jakub Jelinek  <jakub@redhat.com>
 
 	Backported from mainline
diff --git a/libsanitizer/configure.tgt b/libsanitizer/configure.tgt
index b241ddb..424fb17 100644
--- a/libsanitizer/configure.tgt
+++ b/libsanitizer/configure.tgt
@@ -60,7 +60,7 @@ case "${target}" in
 		TSAN_TARGET_DEPENDENT_OBJECTS=tsan_rtl_aarch64.lo
 	fi
 	;;
-  x86_64-*-darwin[1]* | i?86-*-darwin[1]*)
+  x86_64-*-darwin1[1-9]* | i?86-*-darwin1[1-9]*)
 	TSAN_SUPPORTED=no
 	;;
   x86_64-*-solaris2.11* | i?86-*-solaris2.11*)