git-compat-util: avoid redeclaring _DEFAULT_SOURCE

We are about to vendor in `mimalloc`'s source code which we will want to include `git-compat-util.h` after defining that constant. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
git-for-windows · Sep 18, 2024 · 199592b · 199592b
1 parent 1f45254
commit 199592b
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/git-compat-util.h b/git-compat-util.h
@@ -191,7 +191,9 @@ struct strbuf;
 #define _ALL_SOURCE 1
 #define _GNU_SOURCE 1
 #define _BSD_SOURCE 1
+#ifndef _DEFAULT_SOURCE
 #define _DEFAULT_SOURCE 1
+#endif
 #define _NETBSD_SOURCE 1
 #define _SGI_SOURCE 1