guarding agains NULL

[wxWidgets.git] / include / wx / defs.h

diff --git a/include/wx/defs.h b/include/wx/defs.h
index d45939038947f5ab9bab85af56e5a543832171f8..f404e9ae21549f9922036990f106116653af1eb7 100644 (file)
--- a/include/wx/defs.h
+++ b/include/wx/defs.h
@@ -175,6 +175,18 @@
 #   define wxSUPPRESS_GCC_PRIVATE_DTOR_WARNING(name)
 #endif
 
+/*
+   Clang Support
+ */
+ 
+#ifndef WX_HAS_CLANG_FEATURE
+#   ifndef __has_feature      
+#       define WX_HAS_CLANG_FEATURE(x) 0 
+#   else
+#       define WX_HAS_CLANG_FEATURE(x) __has_feature(x)
+#   endif
+#endif
+
 /*  ---------------------------------------------------------------------------- */
 /*  wxWidgets version and compatibility defines */
 /*  ---------------------------------------------------------------------------- */
@@ -514,6 +526,17 @@ typedef short int WXTYPE;
 #   define WX_ATTRIBUTE_PRINTF_5 WX_ATTRIBUTE_PRINTF(5, 6)
 #endif /* !defined(WX_ATTRIBUTE_PRINTF) */
 
+#ifndef WX_ATTRIBUTE_NORETURN
+#   if WX_HAS_CLANG_FEATURE(attribute_analyzer_noreturn)
+#       define WX_ATTRIBUTE_NORETURN __attribute__((analyzer_noreturn))
+#   elif defined( __GNUC__ )
+#       define WX_ATTRIBUTE_NORETURN __attribute__ ((noreturn))
+#   elif wxCHECK_VISUALC_VERSION(7)
+#       define WX_ATTRIBUTE_NORETURN __declspec(noreturn)
+#   else
+#       define WX_ATTRIBUTE_NORETURN
+#   endif
+#endif
 
 /*  Macro to issue warning when using deprecated functions with gcc3 or MSVC7: */
 #if wxCHECK_GCC_VERSION(3, 1)