From 87f76327604e71d218d3d7741c64641330eae75d Mon Sep 17 00:00:00 2001
From: Simon Arlott <sa.me.uk>
Date: Thu, 12 May 2016 12:33:20 +0100
Subject: [PATCH] librb: support rb_path_to_self on FreeBSD 4.8

---
 librb/src/unix.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/librb/src/unix.c b/librb/src/unix.c
index 9cb84512..0fab90a9 100644
--- a/librb/src/unix.c
+++ b/librb/src/unix.c
@@ -171,7 +171,7 @@ rb_path_to_self(void)
 		return NULL;
 	realpath(s, path_buf);
 	return path_buf;
-#elif defined(__linux__)
+#elif defined(__linux__) || (defined(__FreeBSD__) && !defined(KERN_PROC_PATHNAME))
 	if (readlink("/proc/self/exe", path_buf, path_len) != -1)
 		return path_buf;
 	return NULL;
@@ -196,6 +196,8 @@ rb_path_to_self(void)
 
 	realpath(tmp_path, path_buf);
 	return path_buf;
+#else
+	return NULL;
 #endif
 }