From f714d3b825d263e735ea3d56a45d7cb13f9664e3 Mon Sep 17 00:00:00 2001
From: adam <adam@pkgsrc.org>
Date: Tue, 17 Apr 2018 09:31:41 +0000
Subject: Print a message if REPLACE_INTERPRETER does not change anything
 (similar to SUBST_)

---
 mk/configure/replace-interpreter.mk | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

(limited to 'mk')

diff --git a/mk/configure/replace-interpreter.mk b/mk/configure/replace-interpreter.mk
index aa7d2c50083..3991da5d4fd 100644
--- a/mk/configure/replace-interpreter.mk
+++ b/mk/configure/replace-interpreter.mk
@@ -1,4 +1,4 @@
-# $NetBSD: replace-interpreter.mk,v 1.15 2018/03/11 15:07:45 rillig Exp $
+# $NetBSD: replace-interpreter.mk,v 1.16 2018/04/17 09:31:41 adam Exp $
 
 # This file provides common templates for replacing #! interpreters
 # in script files.
@@ -107,7 +107,12 @@ replace-interpreter:
 			if [ -x "$${f}" ]; then				\
 				${CHMOD} a+x "$${f}.new";		\
 			fi;						\
-			${MV} -f "$${f}.new" "$${f}";			\
+			if ${CMP} -s "$${f}.new" "$${f}"; then		\
+				${INFO_MSG} "[replace-interpreter] Nothing changed in $${f}."; \
+				${RM} -f "$${f}.new";			\
+			else						\
+				${MV} -f "$${f}.new" "$${f}";		\
+			fi;						\
 		elif [ -d "$$f" ]; then					\
 			${SHCOMMENT} "Ignore it, most probably comes from shell globs"; \
 		else							\
-- 
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