X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Flseek.m4;h=f6452f6f20ea7d499e127ac4650739e3abd00bc0;hb=28b78430edd4230b709985803d942c98614caa9b;hp=b40da70a2cf43e129de6daf8ba86e7807c9beeca;hpb=441aa3044f43e5572f58c354f01e6bc070acd5c7;p=gnulib.git

diff --git a/m4/lseek.m4 b/m4/lseek.m4
index b40da70a2..f6452f6f2 100644
--- a/m4/lseek.m4
+++ b/m4/lseek.m4
@@ -1,5 +1,5 @@
-# lseek.m4 serial 4
-dnl Copyright (C) 2007 Free Software Foundation, Inc.
+# lseek.m4 serial 6
+dnl Copyright (C) 2007, 2009-2011 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.
@@ -10,29 +10,28 @@ AC_DEFUN([gl_FUNC_LSEEK],
   AC_REQUIRE([AC_PROG_CC])
   AC_CACHE_CHECK([whether lseek detects pipes], [gl_cv_func_lseek_pipe],
     [if test $cross_compiling = no; then
-       AC_LINK_IFELSE([
+       AC_LINK_IFELSE([AC_LANG_PROGRAM([[
 #include <sys/types.h> /* for off_t */
 #include <stdio.h> /* for SEEK_CUR */
-#include <unistd.h>
-int main ()
-{
+#include <unistd.h>]], [[
   /* Exit with success only if stdin is seekable.  */
   return lseek (0, (off_t)0, SEEK_CUR) < 0;
-}],
+]])],
          [if test -s conftest$ac_exeext \
              && ./conftest$ac_exeext < conftest.$ac_ext \
-             && { echo hi | ./conftest$ac_exeext; test $? = 1; }; then
+             && test 1 = "`echo hi \
+               | { ./conftest$ac_exeext; echo $?; cat >/dev/null; }`"; then
             gl_cv_func_lseek_pipe=yes
           else
             gl_cv_func_lseek_pipe=no
           fi],
          [gl_cv_func_lseek_pipe=no])
      else
-       AC_COMPILE_IFELSE([
+       AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
 #if ((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__) || defined __BEOS__
 /* mingw and BeOS mistakenly return 0 when trying to seek on pipes.  */
   Choke me.
-#endif],
+#endif]])],
          [gl_cv_func_lseek_pipe=yes], [gl_cv_func_lseek_pipe=no])
      fi])
   if test $gl_cv_func_lseek_pipe = no; then