contrib/tools/bison/patches/darwin-extern-environ.patch


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--- a/lib/spawn-pipe.c	(index)
+++ b/lib/spawn-pipe.c	(working tree)
@@ -53,7 +53,10 @@
 # include <spawn.h>

 #endif
 
+#if defined(__FreeBSD__) || defined(__MACH__)
+    extern char** environ;
+#endif
 
 #ifdef EINTR