compat: Add simplified merge sort implementation from glibc

diff --git a/git-compat-util.h b/git-compat-util.h
index b6ef5442b79bc8a071597c1b0ad5508a4ed55a33..05146047e0f33476df963e0e5aef30dd02a249fc 100644 (file)
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -68,7 +68,9 @@
 #include <sys/poll.h>
 #include <sys/socket.h>
 #include <sys/ioctl.h>
+#ifndef NO_SYS_SELECT_H
 #include <sys/select.h>
+#endif
 #include <assert.h>
 #include <regex.h>
 #include <netinet/in.h>
@@ -424,4 +426,10 @@ static inline int strtol_i(char const *s, int base, int *result)
        return 0;
 }
 
+#ifdef INTERNAL_QSORT
+void git_qsort(void *base, size_t nmemb, size_t size,
+              int(*compar)(const void *, const void *));
+#define qsort git_qsort
+#endif
+
 #endif