configure.in

DNA define([AC_CACHE_LOAD], )dnl
dnl define([AC_CACHE_SAVE], )dnl

AC_INIT(Makefile)


dnl work out who the cpu, vendor and OS are
AC_CANONICAL_SYSTEM
AC_DEFINE_UNQUOTED(CPU_VENDOR_OS, "$target")

AC_PATH_PROG(ERL, erl)
AC_PATH_PROG(ERLC, erlc)
ERLBINDIR=`dirname $ERL` ; ERLBINDIR=`dirname $ERLBINDIR`/lib/erlang/bin

AC_SUBST(ERL)
AC_SUBST(ERLC)

AC_SUBST(ERLBINDIR)


dnl ----------------------------------------------------------------------
dnl
dnl BT_ERL_LIB_VSN figures out version of an erlang application
dnl and substitutes it as "APPNAME"_VSN
dnl

AC_DEFUN(BT_ERL_LIB_VSN,
[
    AC_MSG_CHECKING([$1 version])
    AC_CACHE_VAL(bt_cv_$1_vsn,
    [bt_cv_$1_vsn="`ls ${ERLDIR} ${ERLDIR}/lib | \
                   awk -F- '/^$1-/ { if ([$]2 > v) v=[$]2; }
                            END    { print v; }'`"
     case "$bt_cv_$1_vsn" in
         "")
             AC_MSG_ERROR("Could not figure out version Erlang library: $1")
             ;;
         *)
             ;;
     esac])
    translit($1, [a-z], [A-Z])_VSN=$bt_cv_$1_vsn
    AC_SUBST(translit($1, [a-z], [A-Z])_VSN)dnl
    AC_MSG_RESULT($bt_cv_$1_vsn)
])dnl


dnl 
dnl I keep the cugwin dll code in case I later learn how to
dnl compile a linked in driver on windows using gcc
dnl

case "$target_os" in
	*cygwin*)
           ERLDIR=`echo "${ERL}" | sed 's/\/bin\/*erl.*//'`
	;;
	*)	
    	  ERLDIR=`awk -F= '/ROOTDIR=/ { print [$]2; exit; }' $ERL`;;
    esac

if test ! -d "$ERLDIR" ; then
	AC_MSG_ERROR([Broken Erlang installation, $ERLDIR does not exist!])
fi
AC_SUBST(ERLDIR)
AC_SUBST(ERL_DLL_LIB)

AC_PROG_INSTALL



AC_OUTPUT(include.mk)