[PATCH] Test for sigsetjmp support in analyzer tests requiring that feature.

[Sandra Loosemore <sandra@codesourcery.com>]

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The new-ish analyzer test cases sigsetjmp-5.c and sigsetjmp-6.c were 
failing on nios2-elf and probably other newlib targets due to lack of 
support for sigsetjmp.  I didn't see a suitable existing 
effective-target test for this, so I added one.

OK to commit?

-Sandra

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commit 86645c71b1ee8ca228a72a0c21ae38c4264da8fb
Author: Sandra Loosemore <sandra@codesourcery.com>
Date:   Sun Mar 22 10:22:59 2020 -0700

    Test for sigsetjmp support in analyzer tests requiring that feature.
    
    2020-03-22  Sandra Loosemore  <sandra@codesourcery.com>
    
    	gcc/testsuite/
    	* gcc.dg/analyzer/sigsetjmp-5.c: Require sigsetjmp support.
    	* gcc.dg/analyzer/sigsetjmp-6.c: Likewise.
    	* lib/target-supports.exp (check_effective_target_sigsetjmp): New.

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 892fcb6..32fc629 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2020-03-22  Sandra Loosemore  <sandra@codesourcery.com>
+
+	* gcc.dg/analyzer/sigsetjmp-5.c: Require sigsetjmp support.
+	* gcc.dg/analyzer/sigsetjmp-6.c: Likewise.
+	* lib/target-supports.exp (check_effective_target_sigsetjmp): New.
+
 2020-03-22  Iain Buclaw  <ibuclaw@gdcproject.org>
 
 	PR d/93038
diff --git a/gcc/testsuite/gcc.dg/analyzer/sigsetjmp-5.c b/gcc/testsuite/gcc.dg/analyzer/sigsetjmp-5.c
index 68afe9d..2bc73e8 100644
--- a/gcc/testsuite/gcc.dg/analyzer/sigsetjmp-5.c
+++ b/gcc/testsuite/gcc.dg/analyzer/sigsetjmp-5.c
@@ -1,3 +1,5 @@
+/* { dg-require-effective-target sigsetjmp } */
+
 #include <setjmp.h>
 #include <stddef.h>
 #include "analyzer-decls.h"
diff --git a/gcc/testsuite/gcc.dg/analyzer/sigsetjmp-6.c b/gcc/testsuite/gcc.dg/analyzer/sigsetjmp-6.c
index fcd9d0b..d45804b 100644
--- a/gcc/testsuite/gcc.dg/analyzer/sigsetjmp-6.c
+++ b/gcc/testsuite/gcc.dg/analyzer/sigsetjmp-6.c
@@ -1,3 +1,5 @@
+/* { dg-require-effective-target sigsetjmp } */
+
 #include <setjmp.h>
 #include <stddef.h>
 #include <stdlib.h>
diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
index 4413c26..6456126 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -8984,6 +8984,12 @@ proc check_effective_target_stpcpy {} {
     return [check_function_available "stpcpy"]
 }
 
+# Returns 1 if "sigsetjmp" is available on the target system.
+
+proc check_effective_target_sigsetjmp {} {
+    return [check_function_available "sigsetjmp"]
+}
+
 # Check whether the vectorizer tests are supported by the target and
 # append additional target-dependent compile flags to DEFAULT_VECTCFLAGS.
 # If a port wants to execute the tests more than once it should append