1 files changed, 7 insertions, 0 deletions
diff --git a/src/chess.h b/src/chess.h
index 15f6ca8..b6175f7 100755
--- a/src/chess.h
+++ b/src/chess.h
@@ -209,6 +209,13 @@ typedef struct _DLIST_ENTRY
 #define VERSION                    "1.00"
 #define REVISION                   "$Id: chess.h 354 2008-06-30 05:10:08Z scott $\n"
 
+// GIT_COMMIT is normally injected by GNUmakefile via -DGIT_COMMIT (short
+// hash, plus a -dirty suffix if the tree had uncommitted changes at build
+// time); this is just a fallback for any build path that doesn't set it.
+#ifndef GIT_COMMIT
+#define GIT_COMMIT                 "unknown"
+#endif
+
 //
 // Function decorators
 //