builtin/merge.c: drop a parameter that is never used

diff --git a/parse-options.h b/parse-options.h
index aeab9aa103faa88a9cdff98db62a586c97298012..8736006ed73560ebb05abac2debb04d5117dc114 100644 (file)
--- a/parse-options.h
+++ b/parse-options.h
@@ -182,7 +182,7 @@ extern NORETURN void usage_msg_opt(const char *msg,
 
 extern int optbug(const struct option *opt, const char *reason);
 extern int opterror(const struct option *opt, const char *reason, int flags);
-#if defined(__GNUC__) && ! defined(clang)
+#if defined(__GNUC__) && ! defined(__clang__)
 #define opterror(o,r,f) (opterror((o),(r),(f)), -1)
 #endif