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acsite.m4
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##### http://autoconf-archive.cryp.to/adl_normalize_path.html
#
# SYNOPSIS
#
# adl_NORMALIZE_PATH(VARNAME, [REFERENCE_STRING])
#
# DESCRIPTION
#
# Perform some cleanups on the value of $VARNAME (interpreted as a
# path):
#
# - empty paths are changed to '.'
# - trailing slashes are removed
# - repeated slashes are squeezed except a leading doubled slash '//'
# (which might indicate a networked disk on some OS).
#
# REFERENCE_STRING is used to turn '/' into '\' and vice-versa: if
# REFERENCE_STRING contains some backslashes, all slashes and
# backslashes are turned into backslashes, otherwise they are all
# turned into slashes.
#
# This makes processing of DOS filenames quite easier, because you
# can turn a filename to the Unix notation, make your processing, and
# turn it back to original notation.
#
# filename='A:\FOO\\BAR\'
# old_filename="$filename"
# # Switch to the unix notation
# adl_NORMALIZE_PATH([filename], ["/"])
# # now we have $filename = 'A:/FOO/BAR' and we can process it as if
# # it was a Unix path. For instance let's say that you want
# # to append '/subpath':
# filename="$filename/subpath"
# # finally switch back to the original notation
# adl_NORMALIZE_PATH([filename], ["$old_filename"])
# # now $filename equals to 'A:\FOO\BAR\subpath'
#
# One good reason to make all path processing with the unix
# convention is that backslashes have a special meaning in many
# cases. For instance
#
# expr 'A:\FOO' : 'A:\Foo'
#
# will return 0 because the second argument is a regex in which
# backslashes have to be backslashed. In other words, to have the two
# strings to match you should write this instead:
#
# expr 'A:\Foo' : 'A:\\Foo'
#
# Such behavior makes DOS filenames extremely unpleasant to work
# with. So temporary turn your paths to the Unix notation, and revert
# them to the original notation after the processing. See the macro
# adl_COMPUTE_RELATIVE_PATHS for a concrete example of this.
#
# REFERENCE_STRING defaults to $VARIABLE, this means that slashes
# will be converted to backslashes if $VARIABLE already contains some
# backslashes (see $thirddir below).
#
# firstdir='/usr/local//share'
# seconddir='C:\Program Files\\'
# thirddir='C:\home/usr/'
# adl_NORMALIZE_PATH([firstdir])
# adl_NORMALIZE_PATH([seconddir])
# adl_NORMALIZE_PATH([thirddir])
# # $firstdir = '/usr/local/share'
# # $seconddir = 'C:\Program Files'
# # $thirddir = 'C:\home\usr'
#
# LAST MODIFICATION
#
# 2006-10-22
#
# COPYLEFT
#
# Copyright (c) 2006 Alexandre Duret-Lutz <[email protected]>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.
#
# As a special exception, the respective Autoconf Macro's copyright
# owner gives unlimited permission to copy, distribute and modify the
# configure scripts that are the output of Autoconf when processing
# the Macro. You need not follow the terms of the GNU General Public
# License when using or distributing such scripts, even though
# portions of the text of the Macro appear in them. The GNU General
# Public License (GPL) does govern all other use of the material that
# constitutes the Autoconf Macro.
#
# This special exception to the GPL applies to versions of the
# Autoconf Macro released by the Autoconf Macro Archive. When you
# make and distribute a modified version of the Autoconf Macro, you
# may extend this special exception to the GPL to apply to your
# modified version as well.
AC_DEFUN([adl_NORMALIZE_PATH],
[case ":[$]$1:" in
# change empty paths to '.'
::) $1='.' ;;
# strip trailing slashes
:*[[\\/]]:) $1=`echo "[$]$1" | sed 's,[[\\/]]*[$],,'` ;;
:*:) ;;
esac
# squeze repeated slashes
case ifelse($2,,"[$]$1",$2) in
# if the path contains any backslashes, turn slashes into backslashes
*\\*) $1=`echo "[$]$1" | sed 's,\(.\)[[\\/]][[\\/]]*,\1\\\\,g'` ;;
# if the path contains slashes, also turn backslashes into slashes
*) $1=`echo "[$]$1" | sed 's,\(.\)[[\\/]][[\\/]]*,\1/,g'` ;;
esac])
##### http://autoconf-archive.cryp.to/adl_compute_relative_paths.html
#
# SYNOPSIS
#
# adl_COMPUTE_RELATIVE_PATHS(PATH_LIST)
#
# DESCRIPTION
#
# PATH_LIST is a space-separated list of colon-separated triplets of
# the form 'FROM:TO:RESULT'. This function iterates over these
# triplets and set $RESULT to the relative path from $FROM to $TO.
# Note that $FROM and $TO needs to be absolute filenames for this
# macro to success.
#
# For instance,
#
# first=/usr/local/bin
# second=/usr/local/share
# adl_COMPUTE_RELATIVE_PATHS([first:second:fs second:first:sf])
# # $fs is set to ../share
# # $sf is set to ../bin
#
# $FROM and $TO are both eval'ed recursively and normalized, this
# means that you can call this macro with autoconf's dirnames like
# `prefix' or `datadir'. For example:
#
# adl_COMPUTE_RELATIVE_PATHS([bindir:datadir:bin_to_data])
#
# adl_COMPUTE_RELATIVE_PATHS should also works with DOS filenames.
#
# You may want to use this macro in order to make your package
# relocatable. Instead of hardcoding $datadir into your programs just
# encode $bin_to_data and try to determine $bindir at run-time.
#
# This macro requires adl_NORMALIZE_PATH.
#
# LAST MODIFICATION
#
# 2006-10-22
#
# COPYLEFT
#
# Copyright (c) 2006 Alexandre Duret-Lutz <[email protected]>
#
# 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, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.
#
# 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 Macro 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([adl_COMPUTE_RELATIVE_PATHS],
[for _lcl_i in $1; do
_lcl_from=\[$]`echo "[$]_lcl_i" | sed 's,:.*$,,'`
_lcl_to=\[$]`echo "[$]_lcl_i" | sed 's,^[[^:]]*:,,' | sed 's,:[[^:]]*$,,'`
_lcl_result_var=`echo "[$]_lcl_i" | sed 's,^.*:,,'`
adl_RECURSIVE_EVAL([[$]_lcl_from], [_lcl_from])
adl_RECURSIVE_EVAL([[$]_lcl_to], [_lcl_to])
_lcl_notation="$_lcl_from$_lcl_to"
adl_NORMALIZE_PATH([_lcl_from],['/'])
adl_NORMALIZE_PATH([_lcl_to],['/'])
adl_COMPUTE_RELATIVE_PATH([_lcl_from], [_lcl_to], [_lcl_result_tmp])
adl_NORMALIZE_PATH([_lcl_result_tmp],["[$]_lcl_notation"])
eval $_lcl_result_var='[$]_lcl_result_tmp'
done])
## Note:
## *****
## The following helper macros are too fragile to be used out
## of adl_COMPUTE_RELATIVE_PATHS (mainly because they assume that
## paths are normalized), that's why I'm keeping them in the same file.
## Still, some of them maybe worth to reuse.
dnl adl_COMPUTE_RELATIVE_PATH(FROM, TO, RESULT)
dnl ===========================================
dnl Compute the relative path to go from $FROM to $TO and set the value
dnl of $RESULT to that value. This function work on raw filenames
dnl (for instead it will considerate /usr//local and /usr/local as
dnl two distinct paths), you should really use adl_COMPUTE_REALTIVE_PATHS
dnl instead to have the paths sanitized automatically.
dnl
dnl For instance:
dnl first_dir=/somewhere/on/my/disk/bin
dnl second_dir=/somewhere/on/another/disk/share
dnl adl_COMPUTE_RELATIVE_PATH(first_dir, second_dir, first_to_second)
dnl will set $first_to_second to '../../../another/disk/share'.
AC_DEFUN([adl_COMPUTE_RELATIVE_PATH],
[adl_COMPUTE_COMMON_PATH([$1], [$2], [_lcl_common_prefix])
adl_COMPUTE_BACK_PATH([$1], [_lcl_common_prefix], [_lcl_first_rel])
adl_COMPUTE_SUFFIX_PATH([$2], [_lcl_common_prefix], [_lcl_second_suffix])
$3="[$]_lcl_first_rel[$]_lcl_second_suffix"])
dnl adl_COMPUTE_COMMON_PATH(LEFT, RIGHT, RESULT)
dnl ============================================
dnl Compute the common path to $LEFT and $RIGHT and set the result to $RESULT.
dnl
dnl For instance:
dnl first_path=/somewhere/on/my/disk/bin
dnl second_path=/somewhere/on/another/disk/share
dnl adl_COMPUTE_COMMON_PATH(first_path, second_path, common_path)
dnl will set $common_path to '/somewhere/on'.
AC_DEFUN([adl_COMPUTE_COMMON_PATH],
[$3=''
_lcl_second_prefix_match=''
while test "[$]_lcl_second_prefix_match" != 0; do
_lcl_first_prefix=`expr "x[$]$1" : "x\([$]$3/*[[^/]]*\)"`
_lcl_second_prefix_match=`expr "x[$]$2" : "x[$]_lcl_first_prefix"`
if test "[$]_lcl_second_prefix_match" != 0; then
if test "[$]_lcl_first_prefix" != "[$]$3"; then
$3="[$]_lcl_first_prefix"
else
_lcl_second_prefix_match=0
fi
fi
done])
dnl adl_COMPUTE_SUFFIX_PATH(PATH, SUBPATH, RESULT)
dnl ==============================================
dnl Substrack $SUBPATH from $PATH, and set the resulting suffix
dnl (or the empty string if $SUBPATH is not a subpath of $PATH)
dnl to $RESULT.
dnl
dnl For instace:
dnl first_path=/somewhere/on/my/disk/bin
dnl second_path=/somewhere/on
dnl adl_COMPUTE_SUFFIX_PATH(first_path, second_path, common_path)
dnl will set $common_path to '/my/disk/bin'.
AC_DEFUN([adl_COMPUTE_SUFFIX_PATH],
[$3=`expr "x[$]$1" : "x[$]$2/*\(.*\)"`])
dnl adl_COMPUTE_BACK_PATH(PATH, SUBPATH, RESULT)
dnl ============================================
dnl Compute the relative path to go from $PATH to $SUBPATH, knowing that
dnl $SUBPATH is a subpath of $PATH (any other words, only repeated '../'
dnl should be needed to move from $PATH to $SUBPATH) and set the value
dnl of $RESULT to that value. If $SUBPATH is not a subpath of PATH,
dnl set $RESULT to the empty string.
dnl
dnl For instance:
dnl first_path=/somewhere/on/my/disk/bin
dnl second_path=/somewhere/on
dnl adl_COMPUTE_BACK_PATH(first_path, second_path, back_path)
dnl will set $back_path to '../../../'.
AC_DEFUN([adl_COMPUTE_BACK_PATH],
[adl_COMPUTE_SUFFIX_PATH([$1], [$2], [_lcl_first_suffix])
$3=''
_lcl_tmp='xxx'
while test "[$]_lcl_tmp" != ''; do
_lcl_tmp=`expr "x[$]_lcl_first_suffix" : "x[[^/]]*/*\(.*\)"`
if test "[$]_lcl_first_suffix" != ''; then
_lcl_first_suffix="[$]_lcl_tmp"
$3="../[$]$3"
fi
done])
dnl adl_RECURSIVE_EVAL(VALUE, RESULT)
dnl =================================
dnl Interpolate the VALUE in loop until it doesn't change,
dnl and set the result to $RESULT.
dnl WARNING: It's easy to get an infinite loop with some unsane input.
AC_DEFUN([adl_RECURSIVE_EVAL],
[_lcl_receval="$1"
$2=`(test "x$prefix" = xNONE && prefix="$ac_default_prefix"
test "x$exec_prefix" = xNONE && exec_prefix="${prefix}"
_lcl_receval_old=''
while test "[$]_lcl_receval_old" != "[$]_lcl_receval"; do
_lcl_receval_old="[$]_lcl_receval"
eval _lcl_receval="\"[$]_lcl_receval\""
done
echo "[$]_lcl_receval")`])
##### http://autoconf-archive.cryp.to/vl_lib_readline.html
#
# SYNOPSIS
#
# VL_LIB_READLINE
#
# DESCRIPTION
#
# Searches for a readline compatible library. If found, defines
# `HAVE_LIBREADLINE'. If the found library has the `add_history'
# function, sets also `HAVE_READLINE_HISTORY'. Also checks for the
# locations of the necessary include files and sets `HAVE_READLINE_H'
# or `HAVE_READLINE_READLINE_H' and `HAVE_READLINE_HISTORY_H' or
# 'HAVE_HISTORY_H' if the corresponding include files exists.
#
# The libraries that may be readline compatible are `libedit',
# `libeditline' and `libreadline'. Sometimes we need to link a
# termcap library for readline to work, this macro tests these cases
# too by trying to link with `libtermcap', `libcurses' or
# `libncurses' before giving up.
#
# Here is an example of how to use the information provided by this
# macro to perform the necessary includes or declarations in a C
# file:
#
# #ifdef HAVE_LIBREADLINE
# # if defined(HAVE_READLINE_READLINE_H)
# # include <readline/readline.h>
# # elif defined(HAVE_READLINE_H)
# # include <readline.h>
# # else /* !defined(HAVE_READLINE_H) */
# extern char *readline ();
# # endif /* !defined(HAVE_READLINE_H) */
# char *cmdline = NULL;
# #else /* !defined(HAVE_READLINE_READLINE_H) */
# /* no readline */
# #endif /* HAVE_LIBREADLINE */
#
# #ifdef HAVE_READLINE_HISTORY
# # if defined(HAVE_READLINE_HISTORY_H)
# # include <readline/history.h>
# # elif defined(HAVE_HISTORY_H)
# # include <history.h>
# # else /* !defined(HAVE_HISTORY_H) */
# extern void add_history ();
# extern int write_history ();
# extern int read_history ();
# # endif /* defined(HAVE_READLINE_HISTORY_H) */
# /* no history */
# #endif /* HAVE_READLINE_HISTORY */
#
# LAST MODIFICATION
#
# 2002-04-04
#
# COPYLEFT
#
# Copyright (c) 2002 Ville Laurikari <[email protected]>
#
# Copying and distribution of this file, with or without
# modification, are permitted in any medium without royalty provided
# the copyright notice and this notice are preserved.
AC_DEFUN([VL_LIB_READLINE], [
AC_CACHE_CHECK([for a readline compatible library],
vl_cv_lib_readline, [
ORIG_LIBS="$LIBS"
for readline_lib in readline edit editline; do
for termcap_lib in "" termcap curses ncurses; do
if test -z "$termcap_lib"; then
TRY_LIB="-l$readline_lib"
else
TRY_LIB="-l$readline_lib -l$termcap_lib"
fi
LIBS="$ORIG_LIBS $TRY_LIB"
AC_TRY_LINK_FUNC(readline, vl_cv_lib_readline="$TRY_LIB")
if test -n "$vl_cv_lib_readline"; then
break
fi
done
if test -n "$vl_cv_lib_readline"; then
break
fi
done
if test -z "$vl_cv_lib_readline"; then
vl_cv_lib_readline="no"
LIBS="$ORIG_LIBS"
fi
])
if test "$vl_cv_lib_readline" != "no"; then
AC_DEFINE(HAVE_LIBREADLINE, 1,
[Define if you have a readline compatible library])
AC_CHECK_HEADERS(readline.h readline/readline.h)
AC_CACHE_CHECK([whether readline supports history],
vl_cv_lib_readline_history, [
vl_cv_lib_readline_history="no"
AC_TRY_LINK_FUNC(add_history, vl_cv_lib_readline_history="yes")
])
if test "$vl_cv_lib_readline_history" = "yes"; then
AC_DEFINE(HAVE_READLINE_HISTORY, 1,
[Define if your readline library has \`add_history'])
AC_CHECK_HEADERS(history.h readline/history.h)
fi
fi
])dnl