dnl -*-autoconf-*-
dnl
dnl Configuration script for SOD
dnl
dnl (c) 2015 Straylight/Edgeware
dnl

dnl----- Licensing notice ---------------------------------------------------
dnl
dnl This file is part of the Sensible Object Design, an object system for C.
dnl
dnl SOD 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 SOD 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 SOD; if not, write to the Free Software Foundation,
dnl Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

dnl--------------------------------------------------------------------------
dnl Initialization.

mdw_AUTO_VERSION
AC_INIT([sod], AUTO_VERSION, [mdw@distorted.org.uk])
AC_CONFIG_SRCDIR([lib/sod.h])
AC_CONFIG_AUX_DIR([config])
AM_INIT_AUTOMAKE([foreign])
mdw_SILENT_RULES

AC_PROG_CC
AM_PROG_LIBTOOL
AX_CFLAGS_WARN_ALL
mdw_LIBTOOL_VERSION_INFO

dnl--------------------------------------------------------------------------
dnl Convert the version number for ASDF.

## This is surprisingly awful.  The convention for official version numbers
## is that they look like MAJOR.MINOR.PATCH[.BPB][-N-gHEX[+]].  ASDF
## insists on simple numeric things separated by dots.  If there's no Git
## thing on the end, then the main version number will do fine.  If there
## is, then we insert /two/ `0's in, followed by N and the HEX converted to
## decimal.  Why two?  Because if there's no brown-paper-bag number, we
## want to make sure that the first BPB release is higher than any of the
## preceding Git revisions.
ver=AC_PACKAGE_VERSION
case $ver in
  *-*-g*)
    base=${ver%%-*} tail=${ver#*-}
    n=${tail%%-*} tail=${tail#*-g}
    case $tail in *+) grubby=.1 tail=${tail%+} ;; *) grubby= ;; esac
    rev=$(( 0x$tail ))
    ASDF_VERSION=$base.0.0.$n.$rev$grubby
    ;;
  *)
    ASDF_VERSION=$ver
    ;;
esac
AC_SUBST([ASDF_VERSION])

dnl--------------------------------------------------------------------------
dnl Common Lisp things.

AC_ARG_WITH([lisp-system],
	[AS_HELP_STRING([--with-lisp-system=SYSTEMS],
			[preference order of cl-launch Lisp systems])],
	[], [with_lisp_system="sbcl clisp"])

AC_CHECK_PROGS([CL_LAUNCH], [cl-launch], [not-found])
case "$CL_LAUNCH" in
  not-found) AC_MSG_ERROR([\`cl-launch' not found]) ;;
esac

AC_MSG_CHECKING([for best choice of Lisp system])
if ! LISPSYS=$($CL_LAUNCH -l "$with_lisp_system" \
		-ip '(string-downcase (lisp-implementation-type))'); then
  AC_MSG_ERROR([cl-launch didn't like any Lisp system])
fi
AC_SUBST([LISPSYS])
AC_MSG_RESULT([$LISPSYS])

AC_MSG_CHECKING([FASL file extension])
fasl=$($CL_LAUNCH -l $LISPSYS -ip \
	'(pathname-type (compile-file-pathname "foo.lisp"))')
AC_SUBST([fasl])
AC_MSG_RESULT([.$fasl])

AC_ARG_WITH([lisp-source-dir],
	[AS_HELP_STRING([--with-lisp-source-dir=DIR],
			[where to install Common Lisp source files])],
	[], [with_lisp_source_dir='${datadir}/common-lisp/source'])
AC_ARG_WITH([lisp-system-dir],
	[AS_HELP_STRING([--with-lisp-system-dir=DIR],
			[where to install ASDF system links])],
	[], [with_lisp_system_dir='${datadir}/common-lisp/systems'])
AC_SUBST([lispsrcdir], [$with_lisp_source_dir])
AC_SUBST([lispsysdir], [$with_lisp_system_dir])

dnl--------------------------------------------------------------------------
dnl Output.

AC_CONFIG_FILES(
  [Makefile]
  [src/Makefile]
  [lib/Makefile]
  [doc/Makefile]
  [test/Makefile])
AC_OUTPUT

dnl----- That's all, folks --------------------------------------------------