>From b24b6bbf9cf4cdc0d5d011b20dd74916507a6153 Mon Sep 17 00:00:00 2001
From: Bruno Haible <address@hidden>
Date: Sun, 13 May 2018 16:08:56 +0200
Subject: [PATCH 4/9] mkfifo: Fix compilation error on Android.

* m4/mkfifo.m4 (gl_FUNC_MKFIFO): Use AC_LINK_IFELSE instead of
AC_CHECK_FUNC.
---
 ChangeLog    |  6 ++++++
 m4/mkfifo.m4 | 17 ++++++++++++++---
 2 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index bb1f4c2..181a08c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,11 @@
 2018-05-13  Bruno Haible  <address@hidden>
 
+	mkfifo: Fix compilation error on Android.
+	* m4/mkfifo.m4 (gl_FUNC_MKFIFO): Use AC_LINK_IFELSE instead of
+	AC_CHECK_FUNC.
+
+2018-05-13  Bruno Haible  <address@hidden>
+
 	c-strtod: Fix configure test for Android.
 	* m4/c-strtod.m4 (gl_C_STRTOD): Use AC_LINK_IFELSE instead of
 	AC_CHECK_FUNC.
diff --git a/m4/mkfifo.m4 b/m4/mkfifo.m4
index 13c5164..5dda67c 100644
--- a/m4/mkfifo.m4
+++ b/m4/mkfifo.m4
@@ -1,4 +1,4 @@
-# serial 5
+# serial 6
 # See if we need to provide mkfifo replacement.
 
 dnl Copyright (C) 2009-2018 Free Software Foundation, Inc.
@@ -12,8 +12,19 @@ AC_DEFUN([gl_FUNC_MKFIFO],
 [
   AC_REQUIRE([gl_SYS_STAT_H_DEFAULTS])
   AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
-  AC_CHECK_FUNCS_ONCE([mkfifo])
-  if test $ac_cv_func_mkfifo = no; then
+
+  dnl We can't use AC_CHECK_FUNC here, because mkfifo() is defined as a
+  dnl static inline function when compiling for Android 4.4 or older.
+  AC_CACHE_CHECK([for mkfifo], [gl_cv_func_mkfifo],
+    [AC_LINK_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <sys/stat.h>]],
+          [[return mkfifo("/",0);]])
+       ],
+       [gl_cv_func_mkfifo=yes],
+       [gl_cv_func_mkfifo=no])
+    ])
+  if test $gl_cv_func_mkfifo = no; then
     HAVE_MKFIFO=0
   else
     dnl Check for Solaris 9 and FreeBSD bug with trailing slash.
-- 
2.7.4