From 75b2c1693e66d624ef0c012b3b811d08a42ba722 Mon Sep 17 00:00:00 2001
From: Nicholas Marriott <nicholas.marriott@gmail.com>
Date: Sun, 3 Apr 2016 23:55:38 +0100
Subject: Add --disable-utempter to build without it.

---
 README       |  3 +++
 configure.ac | 24 ++++++++++++++++--------
 2 files changed, 19 insertions(+), 8 deletions(-)

diff --git a/README b/README
index 9141f240..2badcdfc 100644
--- a/README
+++ b/README
@@ -15,6 +15,9 @@ To build tmux from a release tarball, do:
 	$ ./configure && make
 	$ sudo make install
 
+By default, tmux will use the utempter library to update utmp(5), if it is
+installed. Run configure with --disable-utempter to disable this.
+
 To get and build the latest from version control:
 
 	$ git clone https://github.com/tmux/tmux.git
diff --git a/configure.ac b/configure.ac
index 8ce20632..ad44899f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -167,16 +167,24 @@ if test "x$found_curses" = xno; then
 fi
 
 # Look for utempter.
-AC_CHECK_HEADER(utempter.h, found_utempter=yes, found_utempter=no)
+AC_ARG_ENABLE(
+	utempter,
+	AC_HELP_STRING(--enable-utempter, use utempter if it is installed),
+	found_utempter=$enable_utempter,
+	found_utempter=yes
+)
 if test "x$found_utempter" = xyes; then
-	AC_SEARCH_LIBS(
-		utempter_add_record,
-		utempter,
-		found_utempter=yes,
-		found_utempter=no
-	)
+	AC_CHECK_HEADER(utempter.h, found_utempter=yes, found_utempter=no)
 	if test "x$found_utempter" = xyes; then
-		AC_DEFINE(HAVE_UTEMPTER)
+		AC_SEARCH_LIBS(
+			utempter_add_record,
+			utempter,
+			found_utempter=yes,
+			found_utempter=no
+		)
+		if test "x$found_utempter" = xyes; then
+			AC_DEFINE(HAVE_UTEMPTER)
+		fi
 	fi
 fi
 
-- 
cgit