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-rw-r--r--src/fmacros.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/fmacros.h b/src/fmacros.h
index c16f5e204..44e378a68 100644
--- a/src/fmacros.h
+++ b/src/fmacros.h
@@ -46,6 +46,10 @@
#define _XOPEN_SOURCE
#endif
+#if defined(__sun)
+#define _POSIX_C_SOURCE 199506L
+#endif
+
#define _LARGEFILE_SOURCE
#define _FILE_OFFSET_BITS 64