compat: Add simplified merge sort implementation from glibc

diff --git a/strbuf.h b/strbuf.h
index 13919123dc5261e7b8e4a4fdfc696f2355482b6c..36d61db65728f61188ef3bedbdbe88d0f2d9a0b9 100644 (file)
--- a/strbuf.h
+++ b/strbuf.h
@@ -117,5 +117,6 @@ extern int strbuf_read_file(struct strbuf *sb, const char *path, size_t hint);
 extern int strbuf_getline(struct strbuf *, FILE *, int);
 
 extern void stripspace(struct strbuf *buf, int skip_comments);
+extern void launch_editor(const char *path, struct strbuf *buffer, const char *const *env);
 
 #endif /* STRBUF_H */