getline: Update regarding AIX.

[gnulib.git] / m4 / posix_spawn.m4

diff --git a/m4/posix_spawn.m4 b/m4/posix_spawn.m4
index acf122d..40df135 100644 (file)
--- a/m4/posix_spawn.m4
+++ b/m4/posix_spawn.m4
@@ -1,5 +1,5 @@
-# posix_spawn.m4 serial 4
-dnl Copyright (C) 2008 Free Software Foundation, Inc.
+# posix_spawn.m4 serial 7
+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,
 dnl with or without modifications, as long as this notice is preserved.
@@ -13,9 +13,9 @@ AC_DEFUN([gl_POSIX_SPAWN],
 AC_DEFUN([gl_POSIX_SPAWN_BODY],
 [
   AC_REQUIRE([gl_SPAWN_H_DEFAULTS])
-  AC_CHECK_FUNCS_ONCE([posix_spawn])
-  dnl Assume that when the main function exists, all the others are
-  dnl available as well.
+  AC_REQUIRE([gl_HAVE_POSIX_SPAWN])
+  dnl Assume that when the main function exists, all the others,
+  dnl except posix_spawnattr_{get,set}sched*, are available as well.
   dnl AC_CHECK_FUNCS_ONCE([posix_spawnp])
   dnl AC_CHECK_FUNCS_ONCE([posix_spawn_file_actions_init])
   dnl AC_CHECK_FUNCS_ONCE([posix_spawn_file_actions_addclose])
@@ -27,10 +27,6 @@ AC_DEFUN([gl_POSIX_SPAWN_BODY],
   dnl AC_CHECK_FUNCS_ONCE([posix_spawnattr_setflags])
   dnl AC_CHECK_FUNCS_ONCE([posix_spawnattr_getpgroup])
   dnl AC_CHECK_FUNCS_ONCE([posix_spawnattr_setpgroup])
-  dnl AC_CHECK_FUNCS_ONCE([posix_spawnattr_getschedparam])
-  dnl AC_CHECK_FUNCS_ONCE([posix_spawnattr_setschedparam])
-  dnl AC_CHECK_FUNCS_ONCE([posix_spawnattr_getschedpolicy])
-  dnl AC_CHECK_FUNCS_ONCE([posix_spawnattr_setschedpolicy])
   dnl AC_CHECK_FUNCS_ONCE([posix_spawnattr_getsigdefault])
   dnl AC_CHECK_FUNCS_ONCE([posix_spawnattr_setsigdefault])
   dnl AC_CHECK_FUNCS_ONCE([posix_spawnattr_getsigmask])
@@ -39,11 +35,40 @@ AC_DEFUN([gl_POSIX_SPAWN_BODY],
   if test $ac_cv_func_posix_spawn = yes; then
     gl_POSIX_SPAWN_WORKS
     case "$gl_cv_func_posix_spawn_works" in
-      *yes) ;;
+      *yes)
+        dnl Assume that these functions are available if POSIX_SPAWN_SETSCHEDULER
+        dnl evaluates to nonzero.
+        dnl AC_CHECK_FUNCS_ONCE([posix_spawnattr_getschedpolicy])
+        dnl AC_CHECK_FUNCS_ONCE([posix_spawnattr_setschedpolicy])
+        AC_CACHE_CHECK([whether posix_spawnattr_setschedpolicy is supported],
+          [gl_cv_func_spawnattr_setschedpolicy],
+          [AC_EGREP_CPP([POSIX scheduling supported], [
+#include <spawn.h>
+#if POSIX_SPAWN_SETSCHEDULER
+ POSIX scheduling supported
+#endif
+],
+             [gl_cv_func_spawnattr_setschedpolicy=yes],
+             [gl_cv_func_spawnattr_setschedpolicy=no])
+          ])
+        dnl Assume that these functions are available if POSIX_SPAWN_SETSCHEDPARAM
+        dnl evaluates to nonzero.
+        dnl AC_CHECK_FUNCS_ONCE([posix_spawnattr_getschedparam])
+        dnl AC_CHECK_FUNCS_ONCE([posix_spawnattr_setschedparam])
+        AC_CACHE_CHECK([whether posix_spawnattr_setschedparam is supported],
+          [gl_cv_func_spawnattr_setschedparam],
+          [AC_EGREP_CPP([POSIX scheduling supported], [
+#include <spawn.h>
+#if POSIX_SPAWN_SETSCHEDPARAM
+ POSIX scheduling supported
+#endif
+],
+             [gl_cv_func_spawnattr_setschedparam=yes],
+             [gl_cv_func_spawnattr_setschedparam=no])
+          ])
+        ;;
       *) REPLACE_POSIX_SPAWN=1 ;;
     esac
-  else
-    HAVE_POSIX_SPAWN=0
   fi
 ])
 
@@ -158,18 +183,18 @@ main ()
           || (err = posix_spawnp (&child, CHILD_PROGRAM_FILENAME, &actions, &attrs, argv, environ)) != 0))
     {
       if (actions_allocated)
-       posix_spawn_file_actions_destroy (&actions);
+        posix_spawn_file_actions_destroy (&actions);
       if (attrs_allocated)
-       posix_spawnattr_destroy (&attrs);
+        posix_spawnattr_destroy (&attrs);
       sigprocmask (SIG_UNBLOCK, &fatal_signal_set, NULL);
       if (err == ENOENT)
-       return 0;
+        return 0;
       else
-       {
-         errno = err;
-         perror ("subprocess failed");
-         exit (1);
-       }
+        {
+          errno = err;
+          perror ("subprocess failed");
+          exit (1);
+        }
     }
   posix_spawn_file_actions_destroy (&actions);
   posix_spawnattr_destroy (&attrs);