-# lseek.m4 serial 6
-dnl Copyright (C) 2007, 2009, 2010 Free Software Foundation, Inc.
+# lseek.m4 serial 8
+dnl Copyright (C) 2007, 2009-2012 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.
[
AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
AC_REQUIRE([AC_PROG_CC])
+ AC_CHECK_HEADERS_ONCE([unistd.h])
AC_CACHE_CHECK([whether lseek detects pipes], [gl_cv_func_lseek_pipe],
[if test $cross_compiling = no; then
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h> /* for off_t */
#include <stdio.h> /* for SEEK_CUR */
-#include <unistd.h>]], [[
+#if HAVE_UNISTD_H
+# include <unistd.h>
+#else /* on Windows with MSVC */
+# include <io.h>
+#endif
+]], [[
/* Exit with success only if stdin is seekable. */
return lseek (0, (off_t)0, SEEK_CUR) < 0;
]])],
[gl_cv_func_lseek_pipe=yes], [gl_cv_func_lseek_pipe=no])
fi])
if test $gl_cv_func_lseek_pipe = no; then
- gl_REPLACE_LSEEK
+ REPLACE_LSEEK=1
+ AC_DEFINE([LSEEK_PIPE_BROKEN], [1],
+ [Define to 1 if lseek does not detect pipes.])
fi
])
-
-AC_DEFUN([gl_REPLACE_LSEEK],
-[
- AC_LIBOBJ([lseek])
- AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
- REPLACE_LSEEK=1
- AC_DEFINE([LSEEK_PIPE_BROKEN], [1],
- [Define to 1 if lseek does not detect pipes.])
-])