X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fspawn_h.m4;h=226cdcf242b7028e811c9feec02383ed9d122529;hb=062cad2d07081f9a60adbb90fc1184a435a1a93f;hp=da7582fc973d8cf5f3c9327201de5317b8224e74;hpb=8a81dc85e19b134d5b8ead55d9131fe87a12305b;p=gnulib.git

diff --git a/m4/spawn_h.m4 b/m4/spawn_h.m4
index da7582fc9..226cdcf24 100644
--- a/m4/spawn_h.m4
+++ b/m4/spawn_h.m4
@@ -1,4 +1,4 @@
-# spawn_h.m4 serial 9
+# spawn_h.m4 serial 10
 dnl Copyright (C) 2008-2010 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -33,10 +33,7 @@ AC_DEFUN([gl_SPAWN_H],
   fi
   AC_SUBST([HAVE_SPAWN_H])
 
-  AC_CHECK_FUNCS_ONCE([posix_spawn])
-  if test $ac_cv_func_posix_spawn != yes; then
-    HAVE_POSIX_SPAWN=0
-  fi
+  AC_REQUIRE([gl_HAVE_POSIX_SPAWN])
 
   AC_REQUIRE([AC_C_RESTRICT])
 
@@ -55,6 +52,20 @@ AC_DEFUN([gl_SPAWN_H],
     posix_spawn_file_actions_adddup2])
 ])
 
+dnl Checks whether the system has the functions posix_spawn.
+dnl Sets ac_cv_func_posix_spawn and HAVE_POSIX_SPAWN.
+AC_DEFUN([gl_HAVE_POSIX_SPAWN],
+[
+  dnl Use AC_REQUIRE here, so that the default behavior below is expanded
+  dnl once only, before all statements that occur in other macros.
+  AC_REQUIRE([gl_SPAWN_H_DEFAULTS])
+
+  AC_CHECK_FUNCS_ONCE([posix_spawn])
+  if test $ac_cv_func_posix_spawn != yes; then
+    HAVE_POSIX_SPAWN=0
+  fi
+])
+
 dnl Unconditionally enables the replacement of <spawn.h>.
 AC_DEFUN([gl_REPLACE_SPAWN_H],
 [