From fbce8b1e4ea6390be0e46a503c5c22b4c4ca4b01 Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Sat, 17 Apr 2021 20:55:27 +0000
Subject: slbt_realpath(): added code path for systems with a realpathat
 syscall.

---
 src/helper/slbt_realpath.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/helper/slbt_realpath.c b/src/helper/slbt_realpath.c
index bae41ec..6b48831 100644
--- a/src/helper/slbt_realpath.c
+++ b/src/helper/slbt_realpath.c
@@ -15,6 +15,10 @@
 #include "slibtool_driver_impl.h"
 #include "slibtool_readlink_impl.h"
 
+#ifdef __unix__
+#include <sys/syscall.h>
+#endif
+
 #ifdef _MIDIPIX_ABI
 #include <sys/fs.h>
 #endif
@@ -23,6 +27,10 @@
 #define ENOTSUP EOPNOTSUPP
 #endif
 
+#ifdef SYS___realpathat
+extern long syscall(int, ...);
+#endif
+
 int slbt_realpath(
 	int             fdat,
 	const char *    path,
@@ -48,6 +56,10 @@ int slbt_realpath(
 	return __fs_rpath(fdat,path,options,buf,buflen);
 #endif
 
+#ifdef SYS___realpathat
+	return syscall(SYS___realpathat,fdat,path,buf,buflen,0);
+#endif
+
 	/* buflen */
 	if (buflen < PATH_MAX) {
 		errno = ENOBUFS;
-- 
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