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authorPetteri Aimonen <jpa@git.mail.kapsi.fi>2012-08-09 16:15:23 +0300
committerPetteri Aimonen <jpa@git.mail.kapsi.fi>2012-08-09 16:15:23 +0300
commit8d5086f052f4282f22d350ac44f6699f3bdf7a06 (patch)
tree9674b8b6fc77fbdb82a9013653efa5d2aa63bd0b /pb_encode.c
parent1aa61f108a1cb1b24219bf0fc0dc52f72c310e89 (diff)
Declare warn_unused_result only on GCC >= 3.4.0.
Thanks to cea.max.simoes for bug report & fix. Update issue 25 Status: FixedInGit
Diffstat (limited to 'pb_encode.c')
-rw-r--r--pb_encode.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/pb_encode.c b/pb_encode.c
index 8868bb6..3fc0381 100644
--- a/pb_encode.c
+++ b/pb_encode.c
@@ -8,14 +8,14 @@
#include "pb_encode.h"
#include <string.h>
-#ifdef __GNUC__
-/* Verify that we remember to check all return values for proper error propagation */
-#define checkreturn __attribute__((warn_unused_result))
+/* The warn_unused_result attribute appeared first in gcc-3.4.0 */
+#if !defined(__GNUC__) || ( __GNUC__ < 3) || (__GNUC__ == 3 && __GNUC_MINOR__ < 4)
+ #define checkreturn
#else
-#define checkreturn
+ /* Verify that we remember to check all return values for proper error propagation */
+ #define checkreturn __attribute__((warn_unused_result))
#endif
-
typedef bool (*pb_encoder_t)(pb_ostream_t *stream, const pb_field_t *field, const void *src) checkreturn;
/* --- Function pointers to field encoders ---