From 5a85721a0a1b592287cb67188c5f0c5b55b3e348 Mon Sep 17 00:00:00 2001
From: Robin Haberkorn <robin.haberkorn@googlemail.com>
Date: Sun, 3 Aug 2025 13:14:51 +0300
Subject: require isatty() on UNIX

Has always been required, but was missing in configure.ac.
---
 configure.ac | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 7320ffe..4821cf9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -174,7 +174,8 @@ AC_CHECK_FUNCS([memset setlocale strchr strrchr fstat sscanf], , [
 # glib defines G_OS_UNIX instead...
 case $host in
 *-*-linux* | *-*-*bsd* | *-*-darwin* | *-*-cygwin* | *-*-haiku*)
-	AC_CHECK_FUNCS([realpath readlink pathconf fchown dup dup2 getpid open read kill mmap popen pclose], , [
+	AC_CHECK_FUNCS([realpath readlink pathconf fchown dup dup2 getpid
+	                open read kill mmap popen pclose isatty], , [
 		AC_MSG_ERROR([Missing libc function])
 	])
 	AC_SEARCH_LIBS(dladdr, [dl], , [
-- 
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