X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fsys_wait_h.m4;h=a6c59d6fa3aac960c2a7a564bc28e4a82e564341;hb=d2ea75707993cf1172a5b99213e7b2051586cb4a;hp=b0d23fac7526fa094a99de6d569f65213108514e;hpb=da857f5cfa81cb721e9afae50e153ed26744bb93;p=gnulib.git

diff --git a/m4/sys_wait_h.m4 b/m4/sys_wait_h.m4
index b0d23fac7..a6c59d6fa 100644
--- a/m4/sys_wait_h.m4
+++ b/m4/sys_wait_h.m4
@@ -1,5 +1,5 @@
-# sys_wait_h.m4 serial 4
-dnl Copyright (C) 2008-2010 Free Software Foundation, Inc.
+# sys_wait_h.m4 serial 6
+dnl Copyright (C) 2008-2013 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.
@@ -10,6 +10,14 @@ AC_DEFUN([gl_SYS_WAIT_H],
 
   dnl <sys/wait.h> is always overridden, because of GNULIB_POSIXCHECK.
   gl_CHECK_NEXT_HEADERS([sys/wait.h])
+
+  dnl Ensure the type pid_t gets defined.
+  AC_REQUIRE([AC_TYPE_PID_T])
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use.
+  gl_WARN_ON_USE_PREPARE([[#include <sys/wait.h>]],
+    [waitpid])
 ])
 
 AC_DEFUN([gl_SYS_WAIT_MODULE_INDICATOR],
@@ -17,9 +25,12 @@ AC_DEFUN([gl_SYS_WAIT_MODULE_INDICATOR],
   dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
   AC_REQUIRE([gl_SYS_WAIT_H_DEFAULTS])
   gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+  dnl Define it also as a C macro, for the benefit of the unit tests.
+  gl_MODULE_INDICATOR_FOR_TESTS([$1])
 ])
 
 AC_DEFUN([gl_SYS_WAIT_H_DEFAULTS],
 [
+  GNULIB_WAITPID=0; AC_SUBST([GNULIB_WAITPID])
   dnl Assume proper GNU behavior unless another module says otherwise.
 ])