From c12d5be929d4c1c2826d678eda44e1f0ce6d37d6 Mon Sep 17 00:00:00 2001
From: sezero <sezero@users.sourceforge.net>
Date: Wed, 11 Jan 2017 17:55:10 +0300
Subject: [PATCH] check for tcgetpgrp() presence before using.

---
 configure.ac | 2 +-
 src/main.c   | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index 888ee9e..94221d2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -235,6 +235,6 @@ XMP_TRY_COMPILE(whether compiler understands -Wunused-result,
   int main(){}],
   CFLAGS="${CFLAGS} -Wno-unused-result")  
 
-AC_CHECK_FUNCS(kill getopt_long)
+AC_CHECK_FUNCS(kill getopt_long tcgetpgrp)
 AC_CONFIG_FILES([Makefile src/Makefile])
 AC_OUTPUT
diff --git a/src/main.c b/src/main.c
index 925e0bf..7ce9cd0 100644
--- a/src/main.c
+++ b/src/main.c
@@ -83,7 +83,7 @@ static void sigtstp_handler(int n)
 
 static void sigcont_handler(int sig)
 {
-#ifdef HAVE_TERMIOS_H
+#if defined(HAVE_TERMIOS_H) && defined(HAVE_TCGETPGRP)
 	unsigned int old_in = foreground_in;
 
 	foreground_in  = tcgetpgrp(STDIN_FILENO)  == getpgrp();