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-rw-r--r--lib/portability.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/portability.h b/lib/portability.h
index 70e33bf6..809f376c 100644
--- a/lib/portability.h
+++ b/lib/portability.h
@@ -11,8 +11,10 @@
#ifdef __GNUC__
#define noreturn __attribute__((noreturn))
+#define printf_format __attribute__((format(printf, 1, 2)))
#else
#define noreturn
+#define printf_format
#endif
// Always use long file support.