libstdc++: testsuite: Add csignal missing test for SIG_IGN

SIG_IGN also needs to be defined according to the C++ standard.
This was missing in the test.

	* testsuite/18_support/headers/csignal/macros.cc: Check for
	SIG_IGN.

Signed-off-by: Xavier Bonaventura <xavibonaventura@gmail.com>

diff --git a/libstdc++-v3/testsuite/18_support/headers/csignal/macros.cc b/libstdc++-v3/testsuite/18_support/headers/csignal/macros.cc
index 6d6c8217b36105e52e5c1e018bd294649cca2732..1076cbca24d5a31333483d8584cdd563ad63bb69 100644 (file)
--- a/libstdc++-v3/testsuite/18_support/headers/csignal/macros.cc
+++ b/libstdc++-v3/testsuite/18_support/headers/csignal/macros.cc
@@ -37,6 +37,10 @@ namespace gnu
     #error "SIG_DFL_must_be_a_macro"
 #endif
 
+#ifndef SIG_IGN
+    #error "SIG_IGN_must_be_a_macro"
+#endif
+
 #ifndef SIGFPE
     #error "SIGFPE_must_be_a_macro"
 #endif