1dnl Special Autoconf macros for GNU tar -*- autoconf -*- 2 3dnl Copyright 2009-2021 Free Software Foundation, Inc. 4dnl 5dnl This file is part of GNU tar. 6dnl 7dnl GNU tar is free software; you can redistribute it and/or modify 8dnl it under the terms of the GNU General Public License as published by 9dnl the Free Software Foundation; either version 3 of the License, or 10dnl (at your option) any later version. 11dnl 12dnl GNU tar is distributed in the hope that it will be useful, 13dnl but WITHOUT ANY WARRANTY; without even the implied warranty of 14dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15dnl GNU General Public License for more details. 16dnl 17dnl You should have received a copy of the GNU General Public License 18dnl along with this program. If not, see <http://www.gnu.org/licenses/>. 19 20AC_DEFUN([TAR_COMPR_PROGRAM],[ 21 m4_pushdef([tar_compr_define],translit($1,[a-z+-],[A-ZX_])[_PROGRAM]) 22 m4_pushdef([tar_compr_var],[tar_cv_compressor_]translit($1,[+-],[x_])) 23 AC_ARG_WITH($1, 24 AC_HELP_STRING([--with-]$1[=PROG], 25 [use PROG as ]$1[ compressor program]), 26 [tar_compr_var=${withval}], 27 [tar_compr_var=m4_if($2,,$1,$2)]) 28 AC_DEFINE_UNQUOTED(tar_compr_define, "$tar_compr_var", 29 [Define to the program name of ]$1[ compressor program])]) 30 31# Provide <attr/xattr.h>, if necessary 32 33AC_DEFUN([TAR_HEADERS_ATTR_XATTR_H], 34[ 35 AC_ARG_WITH([xattrs], 36 AS_HELP_STRING([--without-xattrs], [don't use linux extended attributes]), 37 [], [with_xattrs=maybe] 38 ) 39 40 # First check for <sys/xattr.h> 41 AC_CHECK_HEADERS([sys/xattr.h]) 42 AM_CONDITIONAL([TAR_COND_XATTR_H],[test "$ac_cv_header_sys_xattr_h" = yes]) 43 if test "$ac_cv_header_sys_xattr_h" != yes; then 44 AC_CHECK_HEADERS([attr/xattr.h]) 45 AM_CONDITIONAL([TAR_COND_XATTR_H],[test "$ac_cv_header_attr_xattr_h" = yes]) 46 fi 47 48 if test "$with_xattrs" != no; then 49 for i in getxattr fgetxattr lgetxattr \ 50 setxattr fsetxattr lsetxattr \ 51 listxattr flistxattr llistxattr 52 do 53 AC_SEARCH_LIBS($i, attr) 54 eval found=\$ac_cv_search_$i 55 test "$found" = "no" && break 56 done 57 58 if test "$found" != no; then 59 AC_DEFINE([HAVE_XATTRS],,[Define when we have working linux xattrs.]) 60 fi 61 fi 62]) 63