dnl Process this file with autoconf to produce a configure script.

AC_PREREQ([2.68])

AC_INIT(capi20.c)
AC_ARG_ENABLE([V2],
  AS_HELP_STRING([--enable-V2],[build libcapi20 version 2 compatible library]),
     [case "${enableval}" in
       yes) LIBCAPI_VERSION=2
	    LIBCAPI_VERSION_AGE=0
	    LIBCAPI_VERSION_RELEASE=12
	    AC_DEFINE([CAPI_LIBRARY_V2],1, [build libcapi20 version 2 compatible library])
	    ;;
       no) LIBCAPI_VERSION=3
	    LIBCAPI_VERSION_AGE=0
	    LIBCAPI_VERSION_RELEASE=6
	    ;;
       *) AC_MSG_ERROR(bad value ${enableval} for --enable-V2) ;;
     esac],
     [
        LIBCAPI_VERSION=3
	LIBCAPI_VERSION_AGE=0
	LIBCAPI_VERSION_RELEASE=6
])

AM_INIT_AUTOMAKE([libcapi20],${LIBCAPI_VERSION}.${LIBCAPI_VERSION_RELEASE})
AC_PREFIX_DEFAULT([/usr])

dnl Checks for programs.
AC_PROG_CC
AC_PROG_INSTALL
AM_PROG_LIBTOOL
AC_PROG_SED

dnl Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS(fcntl.h sys/ioctl.h unistd.h)
AC_CHECK_HEADERS(linux/capi.h)

AC_COMPUTE_INT([CAPI_MODULE_LOADER_VERSION], [[MODULE_LOADER_VERSION]],
	[
		#include <sys/types.h>
		#include "capi_mod.h"
	],
	[AC_MSG_ERROR([capi library MODULE_LOADER_VERSION cannot be calculated])]
)
AC_MSG_RESULT([Capi library module loader version ${CAPI_MODULE_LOADER_VERSION} detected]) 
AC_SUBST(CAPI_MODULE_LOADER_VERSION)

dnl Checks for library functions.
AC_CHECK_FUNCS(select)

dnl Define which variables to substitute & which files to generate
AC_SUBST(CAPI_LIBRARY_V2)
AC_SUBST(LIBCAPI_VERSION)
AC_SUBST(LIBCAPI_VERSION_AGE)
AC_SUBST(LIBCAPI_VERSION_RELEASE)
AC_CONFIG_HEADERS(config.h)

AC_OUTPUT(Makefile capi20.pc)