fpending: fix regression on DragonFly BSD

[gnulib.git] / m4 / fpending.m4

diff --git a/m4/fpending.m4 b/m4/fpending.m4
index c8d9e8b..669105b 100644 (file)
--- a/m4/fpending.m4
+++ b/m4/fpending.m4
@@ -1,4 +1,4 @@
-# serial 20
+# serial 21
 
 # Copyright (C) 2000-2001, 2004-2013 Free Software Foundation, Inc.
 # This file is free software; the Free Software Foundation
@@ -16,19 +16,23 @@ dnl we have to grub around in the FILE struct.
 AC_DEFUN([gl_FUNC_FPENDING],
 [
   AC_CHECK_HEADERS_ONCE([stdio_ext.h])
+  fp_headers='
+    #include <stdio.h>
+    #if HAVE_STDIO_EXT_H
+    # include <stdio_ext.h>
+    #endif
+  '
   AC_CACHE_CHECK([for __fpending], [gl_cv_func___fpending],
     [
       AC_LINK_IFELSE(
-        [AC_LANG_PROGRAM(
-           [[#include <stdio.h>
-             #if HAVE_STDIO_EXT_H
-             # include <stdio_ext.h>
-             #endif
-           ]],
+        [AC_LANG_PROGRAM([$fp_headers],
            [[return ! __fpending (stdin);]])],
         [gl_cv_func___fpending=yes],
         [gl_cv_func___fpending=no])
     ])
+  if test $gl_cv_func___fpending = yes; then
+    AC_CHECK_DECLS([__fpending], [], [], [$fp_headers])
+  fi
 ])
 
 AC_DEFUN([gl_PREREQ_FPENDING],