1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
# ===========================================================================
# http://autoconf-archive.cryp.to/ac_prog_cp_s.html
# ===========================================================================
#
# SYNOPSIS
#
# AC_PROG_CP_S
#
# DESCRIPTION
#
# Check how to make a copy by creating a symbolic link to the original -
# it defines the variable CP_S for further use, which you should in fact
# treat like it used to be with be LN_S. The actual value is assured to be
# either LN_S (if the filesystem supports symbolic links) or CP (if the
# filesystem does not know about symbolic links and you need a copy of
# original file to have the same text in both places). In a gnu
# environment it will simply set CP_S="cp -s" since the gnu "cp"-command
# has the "-s" flag. You shall not try to use this command on directories
# since it would require a "-r" in the case of a copy that is not
# supported explicitly here. (I'm not sure if some "cp"-commands out there
# would barf at usage of "-r" on a normal file).
#
# Use CP_S to create a copy of read-only data - if your filesystem
# supports it then a symbolic link is created - a process that is quicker
# and space-saving. However, if the target fs does not support symbolic
# links, just copy the data. Unlike ac_prog_ln_s this macro will never
# fail to set the CP_S ac_subst to something that works.
#
# LICENSE
#
# Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 2 of the License, or (at your
# option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
# Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program. If not, see <http://www.gnu.org/licenses/>.
#
# As a special exception, the respective Autoconf Macro's copyright owner
# gives unlimited permission to copy, distribute and modify the configure
# scripts that are the output of Autoconf when processing the Macro. You
# need not follow the terms of the GNU General Public License when using
# or distributing such scripts, even though portions of the text of the
# Macro appear in them. The GNU General Public License (GPL) does govern
# all other use of the material that constitutes the Autoconf Macro.
#
# This special exception to the GPL applies to versions of the Autoconf
# Macro released by the Autoconf Archive. When you make and distribute a
# modified version of the Autoconf Macro, you may extend this special
# exception to the GPL to apply to your modified version as well.
AC_DEFUN([AC_PROG_CP_S],
[AC_REQUIRE([AC_PROG_LN_S])dnl
AC_MSG_CHECKING(whether cp -s works)
AC_CACHE_VAL(ac_cv_prog_CP_S,
[rm -f conftestdata
if cp -s X conftestdata 2>/dev/null
then
rm -f conftestdata
ac_cv_prog_CP_S="cp -s"
else
ac_cv_prog_CP_S=cp
fi
if test "$LN_S" = "ln -s" ; then
ac_cv_prog_CP_S="ln -s"
fi])dnl
CP_S="$ac_cv_prog_CP_S"
if test "$ac_cv_prog_CP_S" = "ln -s"; then
AC_MSG_RESULT(using ln -s)
elif test "$ac_cv_prog_CP_S" = "cp -s"; then
AC_MSG_RESULT(yes)
else
AC_MSG_RESULT(no, using cp)
fi
AC_SUBST(CP_S)dnl
])
|