>From 9f442cbb0bd8ed7398aee30c3a3944486a64a058 Mon Sep 17 00:00:00 2001
From: Bruno Haible <address@hidden>
Date: Sun, 13 May 2018 16:45:11 +0200
Subject: [PATCH 7/9] tcgetsid: Fix compilation error on Android.

* m4/tcgetsid.m4 (gl_FUNC_TCGETSID): Use AC_LINK_IFELSE instead of
AC_CHECK_FUNC.
---
 ChangeLog      |  6 ++++++
 m4/tcgetsid.m4 | 16 +++++++++++++---
 2 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index a2fa28b..8643efa 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,11 @@
 2018-05-13  Bruno Haible  <address@hidden>
 
+	tcgetsid: Fix compilation error on Android.
+	* m4/tcgetsid.m4 (gl_FUNC_TCGETSID): Use AC_LINK_IFELSE instead of
+	AC_CHECK_FUNC.
+
+2018-05-13  Bruno Haible  <address@hidden>
+
 	getpass: Fix configure test for Android.
 	* m4/getpass.m4 (gl_PREREQ_GETPASS): Use AC_LINK_IFELSE instead of
 	AC_CHECK_FUNC.
diff --git a/m4/tcgetsid.m4 b/m4/tcgetsid.m4
index 3a91836..bc8c50d 100644
--- a/m4/tcgetsid.m4
+++ b/m4/tcgetsid.m4
@@ -1,4 +1,4 @@
-# tcgetsid.m4 serial 4
+# tcgetsid.m4 serial 5
 dnl Copyright (C) 2010-2018 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -16,8 +16,18 @@ AC_DEFUN([gl_FUNC_TCGETSID],
     HAVE_DECL_TCGETSID=0
   fi
 
-  AC_CHECK_FUNCS([tcgetsid])
-  if test $ac_cv_func_tcgetsid = yes; then
+  dnl We can't use AC_CHECK_FUNC here, because tcgetsid() is defined as a
+  dnl static inline function when compiling for Android 4.4 or older.
+  AC_CACHE_CHECK([for tcgetsid], [gl_cv_func_tcgetsid],
+    [AC_LINK_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <termios.h>]],
+          [[return tcgetsid(0);]])
+       ],
+       [gl_cv_func_tcgetsid=yes],
+       [gl_cv_func_tcgetsid=no])
+    ])
+  if test $gl_cv_func_tcgetsid = yes; then
     HAVE_TCGETSID=1
   else
     HAVE_TCGETSID=0
-- 
2.7.4