Test for sigsetjmp support in analyzer tests requiring that feature.

2020-03-24  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.

gcc/testsuite/ChangeLog

+2020-03-24  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.
+
 2020-03-24  Marek Polacek  <polacek@redhat.com>
 
 	PR c++/94190 - wrong no post-decrement operator error in template.

gcc/testsuite/gcc.dg/analyzer/sigsetjmp-5.c

+/* { dg-require-effective-target sigsetjmp } */
+
 #include <setjmp.h>
 #include <stddef.h>
 #include "analyzer-decls.h"

gcc/testsuite/gcc.dg/analyzer/sigsetjmp-6.c

+/* { dg-require-effective-target sigsetjmp } */
+
 #include <setjmp.h>
 #include <stddef.h>
 #include <stdlib.h>

gcc/testsuite/lib/target-supports.exp

@@ -9034,6 +9034,12 @@ 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