From ae00c100acdb4d2d3f99524d30258d07eefcfb6d Mon Sep 17 00:00:00 2001
From: Alexander Barton <alex@barton.de>
Date: Sun, 10 Nov 2013 17:08:41 +0100
Subject: [PATCH] Only use unsetenv() when it is available

AIX 4.3 dosn't support it, for example.
---
 configure.ng      | 2 +-
 src/ngircd/conn.c | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/configure.ng b/configure.ng
index e3f51cf0..b9e92704 100644
--- a/configure.ng
+++ b/configure.ng
@@ -189,7 +189,7 @@ AC_CHECK_FUNCS([ \
 AC_CHECK_FUNCS_ONCE([ \
 	arc4random arc4random_stir gai_strerror getaddrinfo getnameinfo inet_aton
 	sigaction sigprocmask snprintf vsnprintf strdup strndup strlcpy strlcat \
-	strtok_r waitpid])
+	strtok_r unsetenv waitpid])
 
 # -- Configuration options --
 
diff --git a/src/ngircd/conn.c b/src/ngircd/conn.c
index 324fa421..e8bfcf1c 100644
--- a/src/ngircd/conn.c
+++ b/src/ngircd/conn.c
@@ -152,7 +152,9 @@ my_sd_listen_fds(void)
 	if (!e || !*e)
 		return -1;
 	count = atoi(e);
+#ifdef HAVE_UNSETENV
 	unsetenv("LISTEN_FDS");
+#endif
 
 	return count;
 }
-- 
2.39.2