X-Git-Url: https://git.cworth.org/git?p=tar;a=blobdiff_plain;f=m4%2Flseek.m4;h=9bf4dc2d046b4536500fd5526f1ab178976b91e1;hp=f336990709c2636072aacfd763a764da1d12db4a;hb=22f1eb8bc17e5be72dd23d42d6aaa60196ac22e6;hpb=00fa13ff3f2d5b6e2a94c5e948c38616ff7ad37a

diff --git a/m4/lseek.m4 b/m4/lseek.m4
index f336990..9bf4dc2 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 5
+dnl Copyright (C) 2007, 2009, 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.
@@ -19,21 +19,22 @@ int main ()
   /* 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 $? = 1; }; then
-	    gl_cv_func_lseek_pipe=yes
-	  else
-	    gl_cv_func_lseek_pipe=no
-	  fi],
-	 [gl_cv_func_lseek_pipe=no])
+         [if test -s conftest$ac_exeext \
+             && ./conftest$ac_exeext < conftest.$ac_ext \
+             && 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([
 #if ((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__) || defined __BEOS__
 /* mingw and BeOS mistakenly return 0 when trying to seek on pipes.  */
   Choke me.
 #endif],
-	 [gl_cv_func_lseek_pipe=yes], [gl_cv_func_lseek_pipe=no])
+         [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
@@ -46,5 +47,5 @@ AC_DEFUN([gl_REPLACE_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.])
+            [Define to 1 if lseek does not detect pipes.])
 ])