Avoid test link errors.

[gnulib.git] / m4 / sys_select_h.m4

diff --git a/m4/sys_select_h.m4 b/m4/sys_select_h.m4
index f9468af..c537e79 100644 (file)
--- a/m4/sys_select_h.m4
+++ b/m4/sys_select_h.m4
@@ -1,4 +1,4 @@
-# sys_select_h.m4 serial 5
+# sys_select_h.m4 serial 6
 dnl Copyright (C) 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,
@@ -7,10 +7,12 @@ dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_HEADER_SYS_SELECT],
 [
   AC_REQUIRE([gl_HEADER_SYS_SOCKET])
+  AC_REQUIRE([gl_SYS_SELECT_H_DEFAULTS])
   AC_CACHE_CHECK([whether <sys/select.h> is self-contained],
     [gl_cv_header_sys_select_h_selfcontained],
     [
-      AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/select.h>]], [[]])],
+      AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/select.h>]],
+                                        [[struct timeval b;]])],
         [gl_cv_header_sys_select_h_selfcontained=yes],
         [gl_cv_header_sys_select_h_selfcontained=no])
     ])
@@ -28,7 +30,16 @@ AC_DEFUN([gl_HEADER_SYS_SELECT],
     gl_PREREQ_SYS_H_WINSOCK2
   fi
   AC_SUBST([SYS_SELECT_H])
-  if test x$ac_cv_header_winsock2_h = xyes; then
-    AC_LIBOBJ(winsock-select)
-  fi
+])
+
+AC_DEFUN([gl_SYS_SELECT_MODULE_INDICATOR],
+[
+  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
+  AC_REQUIRE([gl_SYS_SELECT_H_DEFAULTS])
+  GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1
+])
+
+AC_DEFUN([gl_SYS_SELECT_H_DEFAULTS],
+[
+  GNULIB_SELECT=0; AC_SUBST([GNULIB_SELECT])
 ])