Make the multithread modules work on Cygwin 1.7.2.

[pspp] / m4 / pipe.m4

diff --git a/m4/pipe.m4 b/m4/pipe.m4
index 4da91155d0f63ed7121306a89e0ae08955a451b4..401881c8f8816bc333a57d28ecb3b38c26ce555f 100644 (file)
--- a/m4/pipe.m4
+++ b/m4/pipe.m4
@@ -1,16 +1,12 @@
-# pipe.m4 serial 1
-dnl Copyright (C) 2004 Free Software Foundation, Inc.
+# pipe.m4 serial 4
+dnl Copyright (C) 2004, 2008, 2009, 2010 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],
 [
-  dnl Prerequisites of lib/pipe.h.
-  AC_CHECK_HEADERS_ONCE(unistd.h)
   dnl Prerequisites of lib/pipe.c.
   AC_REQUIRE([AC_C_INLINE])
   AC_REQUIRE([AC_TYPE_MODE_T])
-  AC_REQUIRE([AC_FUNC_FORK])
-  AC_CHECK_FUNCS(posix_spawn)
 ])