implement full-blown select(2) for winsock

[gnulib.git] / m4 / getopt.m4

diff --git a/m4/getopt.m4 b/m4/getopt.m4
index 051c649..9b683c2 100644 (file)
--- a/m4/getopt.m4
+++ b/m4/getopt.m4
@@ -1,11 +1,11 @@
-# getopt.m4 serial 10
-dnl Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+# getopt.m4 serial 14
+dnl Copyright (C) 2002-2006, 2008 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.
 
 # The getopt module assume you want GNU getopt, with getopt_long etc,
-# rather than vanilla POSIX getopt.  This means your your code should
+# rather than vanilla POSIX getopt.  This means your code should
 # always include <getopt.h> for the getopt prototypes.
 
 AC_DEFUN([gl_GETOPT_SUBSTITUTE],
@@ -27,8 +27,10 @@ AC_DEFUN([gl_GETOPT_SUBSTITUTE_HEADER],
 
 AC_DEFUN([gl_GETOPT_CHECK_HEADERS],
 [
-  GETOPT_H=
-  AC_CHECK_HEADERS([getopt.h], [], [GETOPT_H=getopt.h])
+  if test -z "$GETOPT_H"; then
+    AC_CHECK_HEADERS([getopt.h], [], [GETOPT_H=getopt.h])
+  fi
+
   if test -z "$GETOPT_H"; then
     AC_CHECK_FUNCS([getopt_long_only], [], [GETOPT_H=getopt.h])
   fi
@@ -44,7 +46,7 @@ AC_DEFUN([gl_GETOPT_CHECK_HEADERS],
   if test -z "$GETOPT_H"; then
     AC_CACHE_CHECK([for working GNU getopt function], [gl_cv_func_gnu_getopt],
       [AC_RUN_IFELSE(
-       [AC_LANG_PROGRAM([#include <getopt.h>],
+       [AC_LANG_PROGRAM([[#include <getopt.h>]],
           [[
             char *myargv[3];
             myargv[0] = "conftest";
@@ -75,4 +77,7 @@ AC_DEFUN([gl_GETOPT_IFELSE],
 AC_DEFUN([gl_GETOPT], [gl_GETOPT_IFELSE([gl_GETOPT_SUBSTITUTE])])
 
 # Prerequisites of lib/getopt*.
-AC_DEFUN([gl_PREREQ_GETOPT], [:])
+AC_DEFUN([gl_PREREQ_GETOPT],
+[
+  AC_CHECK_DECLS_ONCE([getenv])
+])