From 6791bdc9b6edcf67a5da718b50c0444ac512c935 Mon Sep 17 00:00:00 2001
From: Simon Tatham <anakin@pobox.com>
Date: Thu, 13 May 2021 18:40:05 +0100
Subject: [PATCH] Don't #include <utmp.h> if it doesn't exist.

A FreeBSD user reports that it doesn't exist there.
---
 cmake/cmake.h.in           | 1 +
 cmake/platforms/unix.cmake | 1 +
 unix/pty.c                 | 2 ++
 3 files changed, 4 insertions(+)

diff --git a/cmake/cmake.h.in b/cmake/cmake.h.in
index b6c07d2c..9de1386b 100644
--- a/cmake/cmake.h.in
+++ b/cmake/cmake.h.in
@@ -21,6 +21,7 @@
 #cmakedefine01 HAVE_SYS_SYSCTL_H
 #cmakedefine01 HAVE_SYS_TYPES_H
 #cmakedefine01 HAVE_GLOB_H
+#cmakedefine01 HAVE_UTMP_H
 #cmakedefine01 HAVE_FUTIMES
 #cmakedefine01 HAVE_GETADDRINFO
 #cmakedefine01 HAVE_POSIX_OPENPT
diff --git a/cmake/platforms/unix.cmake b/cmake/platforms/unix.cmake
index 156919e7..cb47caf9 100644
--- a/cmake/platforms/unix.cmake
+++ b/cmake/platforms/unix.cmake
@@ -18,6 +18,7 @@ check_include_file(asm/hwcap.h HAVE_ASM_HWCAP_H)
 check_include_file(sys/sysctl.h HAVE_SYS_SYSCTL_H)
 check_include_file(sys/types.h HAVE_SYS_TYPES_H)
 check_include_file(glob.h HAVE_GLOB_H)
+check_include_file(utmp.h HAVE_UTMP_H)
 
 check_symbol_exists(futimes "sys/time.h" HAVE_FUTIMES)
 check_symbol_exists(getaddrinfo "sys/types.h;sys/socket.h;netdb.h"
diff --git a/unix/pty.c b/unix/pty.c
index 30e48e50..abafa108 100644
--- a/unix/pty.c
+++ b/unix/pty.c
@@ -13,7 +13,9 @@
 #include <fcntl.h>
 #include <termios.h>
 #include <grp.h>
+#if HAVE_UTMP_H
 #include <utmp.h>
+#endif
 #include <pwd.h>
 #include <time.h>
 #include <sys/types.h>