[gcc r12-10361] Testsuite: fix analyzer tests on Darwin

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

https://gcc.gnu.org/g:c2cb625eb141cacd0bee6c6ce5888d673ac38ca4

commit r12-10361-gc2cb625eb141cacd0bee6c6ce5888d673ac38ca4
Author: Francois-Xavier Coudert <fxcoudert@gcc.gnu.org>
Date:   Sat Aug 19 23:22:06 2023 +0200

    Testsuite: fix analyzer tests on Darwin
    
    On macOS, system headers redefine by default some macros (memcpy,
    memmove, etc) to checked versions, which defeats the analyzer. We
    want to turn this off.
    See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104042
    
    gcc/testsuite/ChangeLog:
    
            PR analyzer/104042
            * gcc.dg/analyzer/analyzer.exp: Pass -D_FORTIFY_SOURCE=0 on Darwin.
    
    (cherry picked from commit ce33bbfcbc7dd3afc6c96fb48a19ed00f0c598ce)

Diff:
---
 gcc/testsuite/gcc.dg/analyzer/analyzer.exp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/gcc/testsuite/gcc.dg/analyzer/analyzer.exp b/gcc/testsuite/gcc.dg/analyzer/analyzer.exp
index 15d979cd8b5..333e8402443 100644
--- a/gcc/testsuite/gcc.dg/analyzer/analyzer.exp
+++ b/gcc/testsuite/gcc.dg/analyzer/analyzer.exp
@@ -32,6 +32,14 @@ if [info exists DEFAULT_CFLAGS] then {
 # If a testcase doesn't have special options, use these.
 set DEFAULT_CFLAGS "-fanalyzer -Wanalyzer-too-complex -fanalyzer-call-summaries"
 
+if { [istarget "*-*-darwin*" ] } {
+  # On macOS, system headers redefine by default some macros (memcpy,
+  # memmove, etc) to checked versions, which defeats the analyzer. We
+  # want to turn this off.
+  # See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104042
+  set DEFAULT_CFLAGS "$DEFAULT_CFLAGS -D_FORTIFY_SOURCE=0"
+}
+
 # Initialize `dg'.
 dg-init