New macro WARN_UNUSED_RESULT.

diff --git a/src/libpspp/ChangeLog b/src/libpspp/ChangeLog
index ca11f306b94614ba80b829ca9d035cec684a834a..31097a107da4eb8277a94be94437b8feb8ad6771 100644 (file)
--- a/src/libpspp/ChangeLog
+++ b/src/libpspp/ChangeLog
@@ -1,3 +1,7 @@
+Sun May  7 17:09:54 2006  Ben Pfaff  <blp@gnu.org>
+
+       * compiler.h: (macro WARN_UNUSED_RESULT) New macro.
+
 Sun May  7 14:32:25 2006  Ben Pfaff  <blp@gnu.org>
 
        * va_copy.h: New header.

diff --git a/src/libpspp/compiler.h b/src/libpspp/compiler.h
index 44f22b39682a5656488126d86eef2ee5dad081b6..8c2c3abd2ea6a808761eed046dce287f277ffaf9 100644 (file)
--- a/src/libpspp/compiler.h
+++ b/src/libpspp/compiler.h
@@ -44,4 +44,11 @@
 #define MALLOC_LIKE
 #endif
 
+/* This attribute was added in GCC 4.0. */
+#if __GNUC__ >= 4
+#define WARN_UNUSED_RESULT ATTRIBUTE ((warn_unused_result))
+#else
+#define WARN_UNUSED_RESULT
+#endif
+
 #endif /* compiler.h */