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44 lines
1.3 KiB
Plaintext
44 lines
1.3 KiB
Plaintext
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dnl Check for a tar program that speaks ustar format
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dnl Copyright (C) 2005, 2006 Free Software Foundation, Inc.
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dnl
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dnl This file is free software, distributed under the terms of the GNU
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dnl General Public License. As a special exception to the GNU General
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dnl Public License, this file may be distributed as part of a program
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dnl that contains a configuration script generated by Autoconf, under
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dnl the same distribution terms as the rest of that program.
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AC_DEFUN([GNUPG_CHECK_USTAR],
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[
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AC_ARG_WITH(tar,
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AC_HELP_STRING([--with-tar=PATH],[look for a tar program in PATH]),
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[_do_tar=$withval])
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if test x$_do_tar != xno ; then
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if test x$_do_tar = x ; then
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AC_PATH_PROG(TAR,"tar")
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_mytar=$ac_cv_path_TAR
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fi
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# Check if our tar is ustar format. If so, it's good. TODO: Add some
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# code to check various options, etc, to try and create ustar
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# format.
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if test x$_mytar != x ; then
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AC_MSG_CHECKING([whether $_mytar speaks USTAR])
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echo hithere > conftest.txt
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$_mytar -cf - conftest.txt | (dd skip=257 bs=1 count=5 2>/dev/null || cat) | grep ustar > /dev/null
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_tar_bad=$?
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rm conftest.txt
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if test x$_tar_bad = x0 ; then
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AC_MSG_RESULT([yes])
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else
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AC_MSG_RESULT([no])
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fi
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fi
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fi
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AM_CONDITIONAL(HAVE_USTAR, test x$_tar_bad = x0)
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])dnl
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