Ensure pid_t gets defined.

[gnulib.git] / m4 / spawn_h.m4

diff --git a/m4/spawn_h.m4 b/m4/spawn_h.m4
index 4903b6a..33d30e6 100644 (file)
--- a/m4/spawn_h.m4
+++ b/m4/spawn_h.m4
@@ -1,4 +1,4 @@
-# spawn_h.m4 serial 13
+# spawn_h.m4 serial 14
 dnl Copyright (C) 2008-2011 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -31,6 +31,9 @@ AC_DEFUN([gl_SPAWN_H],
   fi
   AC_SUBST([HAVE_SPAWN_H])
 
+  dnl Ensure the type pid_t gets defined.
+  AC_REQUIRE([AC_TYPE_PID_T])
+
   AC_REQUIRE([gl_HAVE_POSIX_SPAWN])
 
   AC_REQUIRE([AC_C_RESTRICT])