md5, sha1, sha256, sha512: add gl_SET_CRYPTO_CHECK_DEFAULT

[gnulib.git] / m4 / pipe.m4

diff --git a/m4/pipe.m4 b/m4/pipe.m4
index 401881c..5831283 100644 (file)
--- a/m4/pipe.m4
+++ b/m4/pipe.m4
@@ -1,12 +1,15 @@
-# pipe.m4 serial 4
-dnl Copyright (C) 2004, 2008, 2009, 2010 Free Software Foundation, Inc.
+# pipe.m4 serial 2
+dnl Copyright (C) 2010-2013 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
 
-AC_DEFUN([gl_PIPE],
+AC_DEFUN([gl_FUNC_PIPE],
 [
-  dnl Prerequisites of lib/pipe.c.
-  AC_REQUIRE([AC_C_INLINE])
-  AC_REQUIRE([AC_TYPE_MODE_T])
+  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+
+  AC_CHECK_FUNCS_ONCE([pipe])
+  if test $ac_cv_func_pipe != yes; then
+    HAVE_PIPE=0
+  fi
 ])