X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fspawn_h.m4;h=a044e372f0bf996d00dd04450c8f593a33d4daab;hb=ce38c27828c6a3286e99e312d50fe140a1ec334b;hp=50ef49ec27bd49820f8b4a9f9d60752565f41e25;hpb=48243a0d59db8389beb900e48bb4553f654083f4;p=gnulib.git

diff --git a/m4/spawn_h.m4 b/m4/spawn_h.m4
index 50ef49ec2..a044e372f 100644
--- a/m4/spawn_h.m4
+++ b/m4/spawn_h.m4
@@ -1,5 +1,5 @@
-# spawn_h.m4 serial 1
-dnl Copyright (C) 2008 Free Software Foundation, Inc.
+# spawn_h.m4 serial 12
+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,
 dnl with or without modifications, as long as this notice is preserved.
@@ -12,31 +12,73 @@ AC_DEFUN([gl_SPAWN_H],
   dnl once only, before all statements that occur in other macros.
   AC_REQUIRE([gl_SPAWN_H_DEFAULTS])
 
+  dnl <spawn.h> is always overridden, because of GNULIB_POSIXCHECK.
   gl_CHECK_NEXT_HEADERS([spawn.h])
 
-  AC_CHECK_HEADERS_ONCE([spawn.h])
   if test $ac_cv_header_spawn_h = yes; then
     HAVE_SPAWN_H=1
+    AC_CHECK_TYPES([posix_spawnattr_t], [], [HAVE_POSIX_SPAWNATTR_T=0], [[
+#include <spawn.h>
+      ]])
+    AC_CHECK_TYPES([posix_spawn_file_actions_t], [],
+      [HAVE_POSIX_SPAWN_FILE_ACTIONS_T=0], [[
+#include <spawn.h>
+      ]])
   else
     HAVE_SPAWN_H=0
+    HAVE_POSIX_SPAWNATTR_T=0
+    HAVE_POSIX_SPAWN_FILE_ACTIONS_T=0
+    gl_REPLACE_SPAWN_H
   fi
   AC_SUBST([HAVE_SPAWN_H])
 
+  AC_REQUIRE([gl_HAVE_POSIX_SPAWN])
+
   AC_REQUIRE([AC_C_RESTRICT])
+
+  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 <spawn.h>
+    ]], [posix_spawn posix_spawnp posix_spawnattr_init posix_spawnattr_destroy
+    posix_spawnattr_getsigdefault posix_spawnattr_setsigdefault
+    posix_spawnattr_getsigmask posix_spawnattr_setsigmask
+    posix_spawnattr_getflags posix_spawnattr_setflags
+    posix_spawnattr_getpgroup posix_spawnattr_setpgroup
+    posix_spawnattr_getschedpolicy posix_spawnattr_setschedpolicy
+    posix_spawnattr_getschedparam posix_spawnattr_setschedparam
+    posix_spawn_file_actions_init posix_spawn_file_actions_destroy
+    posix_spawn_file_actions_addopen posix_spawn_file_actions_addclose
+    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],
 [
-  AC_REQUIRE([gl_SPAWN_H_DEFAULTS])
-  SPAWN_H='spawn.h'
+  dnl This is a no-op, because <spawn.h> is always overridden.
+  :
 ])
 
 AC_DEFUN([gl_SPAWN_MODULE_INDICATOR],
 [
   dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
   AC_REQUIRE([gl_SPAWN_H_DEFAULTS])
-  GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1
+  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_SPAWN_H_DEFAULTS],
@@ -63,7 +105,9 @@ AC_DEFUN([gl_SPAWN_H_DEFAULTS],
   GNULIB_POSIX_SPAWNATTR_SETSIGMASK=0;        AC_SUBST([GNULIB_POSIX_SPAWNATTR_SETSIGMASK])
   GNULIB_POSIX_SPAWNATTR_DESTROY=0;           AC_SUBST([GNULIB_POSIX_SPAWNATTR_DESTROY])
   dnl Assume proper GNU behavior unless another module says otherwise.
-  HAVE_POSIX_SPAWN=1;     AC_SUBST([HAVE_POSIX_SPAWN])
-  REPLACE_POSIX_SPAWN=0;  AC_SUBST([REPLACE_POSIX_SPAWN])
-  SPAWN_H='';             AC_SUBST([SPAWN_H])
+  HAVE_POSIX_SPAWN=1;        AC_SUBST([HAVE_POSIX_SPAWN])
+  HAVE_POSIX_SPAWNATTR_T=1;  AC_SUBST([HAVE_POSIX_SPAWNATTR_T])
+  HAVE_POSIX_SPAWN_FILE_ACTIONS_T=1;
+                             AC_SUBST([HAVE_POSIX_SPAWN_FILE_ACTIONS_T])
+  REPLACE_POSIX_SPAWN=0;     AC_SUBST([REPLACE_POSIX_SPAWN])
 ])