dnl -*-autoconf-*-					  *@--GLOB-HEADER--@*
dnl
dnl Common library of autoconf macros
dnl
dnl (c) 1997 Mark Wooding, except for macros and documentation where noted.
dnl

dnl----- Licensing notice ---------------------------------------------------
dnl
dnl This file is part of the Common Files Distribution (`common')
dnl
dnl `Common' is free software; you can redistribute it and/or modify
dnl it under the terms of the GNU General Public License as published by
dnl the Free Software Foundation; either version 2 of the License, or
dnl (at your option) any later version.
dnl
dnl `Common' is distributed in the hope that it will be useful,
dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
dnl GNU General Public License for more details.
dnl
dnl You should have received a copy of the GNU General Public License
dnl along with `common'; if not, write to the Free Software Foundation,
dnl Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

dnl *@--NOTICE--@* Common File Distribution

dnl --- *@-mdw_AUTO_VERSION-@* ---
dnl
dnl Author:	Mark Wooding
dnl
dnl Synopsis:	mdw_AUTO_VERSION
dnl
dnl Arguments:	---
dnl
dnl Use:	Defines an m4 macro AUTO_VERSION which contains the current
dnl		version number, worked out in some clever way.

AC_DEFUN([mdw_AUTO_VERSION], [nobody cares...])
m4_define([mdw_AUTO_VERSION], [m4_define([AUTO_VERSION], m4_esyscmd([
  ver=UNKNOWN
  for pre in ./ config/; do
    for post in "" .in; do
      try=${pre}auto-version${post}
      if test -x $try; then ver=$("$try"); break; fi
    done
  done
  echo -n "$ver"
]))])

dnl --- *@-mdw_LIBTOOL_VERSION_INFO-@* ---
dnl
dnl Author:	Mark Wooding
dnl
dnl Synopsis:	mdw_LIBTOOL_VERSION
dnl
dnl Arguments:	---
dnl
dnl Use:	Decodes the PACKAGE_VERSION variable as a libtool
dnl		version-info string.  Strictly speaking, this is very
dnl		naughty.

AC_DEFUN([mdw_LIBTOOL_VERSION_INFO], [
  set -- $(echo $PACKAGE_VERSION |
  sed 's:[^\([0-9][0-9]*\)\.\([0-9][0-9]*\)\.\([0-9][0-9]*\).*$]:\1 \2 \3:'
  )
  LIBTOOL_VERSION_INFO="$(expr $[]1 + $[]2):$[]3:$[]2"
  AC_SUBST([LIBTOOL_VERSION_INFO])
])

dnl --- *@-mdw_SILENT_RULES-@* ---
dnl
dnl Author:	Mark Wooding
dnl
dnl Synopsis:	mdw_SILENT_RULES
dnl
dnl Arguments:	---
dnl
dnl Use:	Enables the Automake `silent-rules' feature, if available.

AC_DEFUN([mdw_SILENT_RULES], [
  m4_ifdef([AM_SILENT_RULES], [
    AM_SILENT_RULES([yes])
  ], [
    AC_SUBST([AM_DEFAULT_VERBOSITY], [1])
  ])
])

dnl --- *@-mdw_DECL_ENVIRON-@* ---
dnl
dnl Author:	Mark Wooding
dnl
dnl Synopsis:	mdw_DECL_ENVIRON
dnl
dnl Arguments:	---
dnl
dnl Use:	Searches for a declaration of the global `environ' variable.
dnl		If one is found in one of the `usual' places, DECL_ENVIRON
dnl		is defined as a preprocessor symbol.

AC_DEFUN([mdw_DECL_ENVIRON],
[AC_CACHE_CHECK([for declaration of \`environ'], mdw_cv_environ,
[AC_EGREP_CPP([\<environ\>],
[#include <sys/types.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#if STDC_HEADERS
#include <stdlib.h>
#include <stddef.h>
#endif], [mdw_cv_environ=yes], [mdw_cv_environ=no])])
if test $mdw_cv_environ = yes; then
  AC_DEFINE([DECL_ENVIRON], [1],
	    [Define if you have the `environ' vector of environment variables.])
fi])

dnl --- *@-mdw_DEFINE_PATHS-@*
dnl
dnl Author:	Mark Wooding
dnl
dnl Synopsis:	mdw_DEFINE_PATHS(CODE)
dnl
dnl Arguments:	CODE = shell script code to execute
dnl
dnl Use:	Fixes up various variables so that pathname defines can be
dnl		defined.  Within CODE, you may use the following macros:
dnl
dnl		mdw_PROG(NAME)		Transformed program name
dnl
dnl		mdw_PATH(PATH)		Expanded path (may contain variables)
dnl
dnl		mdw_DEFINE_PROG(SYMBOL, PROG)
dnl					Define a symbol as a transformed
dnl					program name.
dnl
dnl		mdw_DEFINE_PATH(SYMBOL, NAME)
dnl					Define a symbol as an expanded path

AC_DEFUN([mdw_DEFINE_PATHS],
[mdw_prefix=$prefix mdw_exec_prefix=$exec_prefix
mdw_transform=`echo "$program_transform_name"|sed 's,\\\\\\\\,\\\\,g; s,\\$\\$,$,g'`
test "$prefix" = "NONE" && prefix=$ac_default_prefix
test "$exec_prefix" = "NONE" && exec_prefix=$prefix
$1
prefix=$mdw_prefix exec_prefix=$mdw_exec_prefix])

AC_DEFUN([mdw_PROG], [`echo "$1"|sed "$mdw_transform"`])
AC_DEFUN([mdw_PATH], [dnl
`t="$1"; dnl
while :; do dnl
case "$t" in dnl
*\\$[]*) t=\`eval echo "$t"\`;; dnl
*) break;; dnl
esac; done; dnl
echo "$t"`])
AC_DEFUN([mdw_DEFINE_PROG],
	 [AC_DEFINE_UNQUOTED([$1], ["mdw_PROG([$2])"],
			     [Program name for $2.])])
AC_DEFUN([mdw_DEFINE_PATH], [AC_DEFINE_UNQUOTED([$1], ["mdw_PATH([$2])"],
						[Pathname for $2.])])

dnl --- *@-mdw_MANEXT-@* ---
dnl
dnl Author:	Mark Wooding
dnl
dnl Synopsis:	mdw_MANEXT
dnl
dnl Arguments:	---
dnl
dnl Use:	Sets the substitution `manext' for man page extensions.

AC_DEFUN([mdw_MANEXT], [
AC_ARG_WITH([man-ext],
[  --with-man-ext=EXT      give manpages the EXT extension (e.g., foo.3EXT)],
[manext=$withval], [manext=mLib])
AC_SUBST(manext)])

dnl --- *@-mdw_DIR_TEXMF-@* ---
dnl
dnl Author:     Mark Wooding
dnl
dnl Synopsis:   mdw_DIR_TEXMF
dnl
dnl Arguments:  ---
dnl
dnl Use:        Sets the substitution `texmfdir' as a sensible TeX install
dnl             tree.

AC_DEFUN([mdw_DIR_TEXMF], [
AC_ARG_WITH([texmfdir],
[  --with-texmfdir=DIR     set the TeX install directory to DIR],
[texmfdir=$withval],
[AC_MSG_CHECKING([where to put installed TeX files])
mdw_DEFINE_PATHS([
texmfdir='${datadir}/texmf'
for d in \
  '${datadir}/texmf' '${prefix}/lib/texmf' \
  '${prefix}/texmf' '${libdir}/lib/texmf'; do
  if test -d "mdw_PATH([$d])"; then
    texmfdir=$d
    break
  fi
done
AC_MSG_RESULT([$texmfdir])])])
AC_SUBST(texmfdir)])

dnl----- That's all, folks --------------------------------- *@--GLOB-END--@*