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-rw-r--r--config.h.in9
1 files changed, 9 insertions, 0 deletions
diff --git a/config.h.in b/config.h.in
index eb2470a..ece0ddc 100644
--- a/config.h.in
+++ b/config.h.in
@@ -162,6 +162,15 @@
#define DFM_MARGIN 3
//
+// OS specific flags.
+//
+#ifdef __linux__
+#define _GNU_SOURCE
+#define _BSD_SOURCE
+#define _POSIX_C_SOURCE 200809L
+#endif
+
+//
// Configuration overrides from ./configure.
//
#include "$CFG_MACRO_GEN"