From 5135279640195ab28e51ec5e12b0de008d35858d Mon Sep 17 00:00:00 2001
From: "Richard M. Stallman" <rms@gnu.org>
Date: Tue, 9 Jun 1998 20:12:44 +0000
Subject: [PATCH] (PTR_TO_OFFSET): Alternate definition if not `emacs'.

---
 src/regex.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/regex.c b/src/regex.c
index 2a260376833..e4422ce9383 100644
--- a/src/regex.c
+++ b/src/regex.c
@@ -27,11 +27,15 @@
 #undef	_GNU_SOURCE
 #define _GNU_SOURCE
 
+#ifdef emacs
 /* Converts the pointer to the char to BEG-based offset from the start.	 */
 #define PTR_TO_OFFSET(d)						\
 	POS_AS_IN_BUFFER (MATCHING_IN_FIRST_STRING			\
 			  ? (d) - string1 : (d) - (string2 - size1))
 #define POS_AS_IN_BUFFER(p) ((p) + (NILP (re_match_object) || BUFFERP (re_match_object)))
+#else
+#define PTR_TO_OFFSET(d) 0
+#endif
 
 #ifdef HAVE_CONFIG_H
 #include <config.h>
-- 
2.39.2