#
# autoconf input for Objective Caml programs
# Modified by the lablgtk2 development team
# Original copyright (C) 2001 Jean-Christophe Filliātre
#   from a first script by Georges Mariano 
# 
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Library General Public
# License version 2, as published by the Free Software Foundation.
# 
# This library 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 Library General Public License version 2 for more details
# (enclosed in the file LGPL).

# the script generated by autoconf from this input will set the following
# variables:
#    CAMLC        "ocamlc" if present in the path, or a failure
#                 or "ocamlc.opt" if present with same version number as ocamlc
#    CAMLOPT      "ocamlopt" (or "ocamlopt.opt" if present), or "no"
#   OCAMLBEST     either "byte" if no native compiler was found, 
#                 or "opt" otherwise
#   OCAMLDEP      "ocamldep"
#   OCAMLLEX      "ocamllex" (or "ocamllex.opt" if present)
#   OCAMLYACC     "ocamlyac"
#   OCAMLLIB      the path to the ocaml standard library
#   OCAMLVERSION  the ocaml version number
#   OCAMLWIN32    "yes"/"no" depending on Sys.os_type = "Win32"
#   EXE           ".exe" if OCAMLWIN32=yes, "" otherwise

# check for one particular file of the sources 
# ADAPT THE FOLLOWING LINE TO YOUR SOURCES!
AC_INIT(src/gtk.ml)

# Check for Ocaml compilers

# we first look for ocamlc in the path; if not present, we fail
AC_CHECK_PROG(CAMLC,ocamlc,ocamlc,no)
if test "$CAMLC" = no ; then
	AC_MSG_ERROR(Cannot find ocamlc.)
fi

# we extract Ocaml version number and library path
OCAMLVERSION=`$CAMLC -version`
echo "ocaml version is $OCAMLVERSION"
OCAMLLIB=`$CAMLC -where`
echo "ocaml library path is $OCAMLLIB"
LIBDIR=$OCAMLLIB

AC_ARG_WITH(libdir,
	[  --with-libdir=/path     install libs in /path/lablgtk2 and /path/stublibs],
	LIBDIR=$withval
	echo "Install dirs are : $LIBDIR/lablgtk2 and $LIBDIR/stublibs"
	echo "	Compile with 
		ocamlc -I $LIBDIR/lablgtk2 
	and add $LIBDIR/stublibs either to OCAMLLIB/ld.conf or 
	to CAML_LD_LIBRARY_PATH", 
	echo "Default install dirs are : $LIBDIR/lablgtk2 and $LIBDIR/stublibs"
	echo "Compile with ocamlc -I +lablgtk2" 
	)

# then we look for ocamlopt; if not present, we issue a warning
# if the version is not the same, we also discard it
# we set OCAMLBEST to "opt" or "byte", whether ocamlopt is available or not
AC_CHECK_PROG(CAMLOPT,ocamlopt,ocamlopt,no)
OCAMLBEST=byte
if test "$CAMLOPT" = no ; then
	AC_MSG_WARN(Cannot find ocamlopt; bytecode compilation only.)
else
	AC_MSG_CHECKING(ocamlopt version)
	TMPVERSION=`$CAMLOPT -version`
	if test "$TMPVERSION" != "$OCAMLVERSION" ; then
	    AC_MSG_RESULT(differs from ocamlc; ocamlopt discarded.)
	    CAMLOPT=no
	else
	    AC_MSG_RESULT(ok)
	    OCAMLBEST=opt
	fi
fi

# checking for ocamlc.opt
AC_CHECK_PROG(OCAMLCDOTOPT,ocamlc.opt,ocamlc.opt,no)
if test "$OCAMLCDOTOPT" != no ; then
	AC_MSG_CHECKING(ocamlc.opt version)
	TMPVERSION=`$OCAMLCDOTOPT -version`
	if test "$TMPVERSION" != "$OCAMLVERSION" ; then
	    AC_MSG_RESULT(differs from ocamlc; ocamlc.opt discarded.)
	else
	    AC_MSG_RESULT(ok)
	    CAMLC=$OCAMLCDOTOPT
	fi
fi

# checking for ocamlopt.opt
if test "$CAMLOPT" != no ; then
    AC_CHECK_PROG(OCAMLOPTDOTOPT,ocamlopt.opt,ocamlopt.opt,no)
    if test "$OCAMLOPTDOTOPT" != no ; then
	AC_MSG_CHECKING(ocamlc.opt version)
	TMPVER=`$OCAMLOPTDOTOPT -version`
	if test "$TMPVER" != "$OCAMLVERSION" ; then
	    AC_MSG_RESULT(differs from ocamlc; ocamlopt.opt discarded.)
	else
	    AC_MSG_RESULT(ok)
	    CAMLOPT=$OCAMLOPTDOTOPT
	fi
    fi
fi

# ocamlrun, ocamldep, ocamllex and ocamlyacc should also be present in the path
AC_CHECK_PROG(OCAMLRUN,ocamlrun,ocamlrun,no)
if test "$OCAMLRUN" = no ; then
	AC_MSG_ERROR(Cannot find ocamlrun.)
fi

AC_CHECK_PROG(OCAMLDEP,ocamldep,ocamldep,no)
if test "$OCAMLDEP" = no ; then
	AC_MSG_ERROR(Cannot find ocamldep.)
fi

AC_CHECK_PROG(OCAMLDOC,ocamldoc,ocamldoc,no)
if test "$OCAMLDOC" = no ; then
	AC_MSG_RESULT(Cannot find ocamldoc.)
fi

AC_CHECK_PROG(OCAMLLEX,ocamllex,ocamllex,no)
if test "$OCAMLLEX" = no ; then
    AC_MSG_ERROR(Cannot find ocamllex.)
#else
#    AC_CHECK_PROG(OCAMLLEXDOTOPT,ocamllex.opt,ocamllex.opt,no)
#    if test "$OCAMLLEXDOTOPT" != no ; then
#	OCAMLLEX=$OCAMLLEXDOTOPT
#    fi
fi

AC_CHECK_PROG(OCAMLYACC,ocamlyacc,ocamlyacc,no)
if test "$OCAMLYACC" = no ; then
	AC_MSG_ERROR(Cannot find ocamlyacc.)
fi

AC_CHECK_PROG(CAMLMKTOP,ocamlmktop,ocamlmktop,no)
if test "$CAMLMKTOP" = no ; then
	AC_MSG_ERROR(Cannot find ocamlmktop.)
fi

AC_CHECK_PROG(CAMLMKLIB,ocamlmklib,ocamlmklib,no)
if test "$CAMLMKLIB" = no ; then
	AC_MSG_ERROR(Cannot find ocamlmklib.)
fi

AC_CHECK_PROG(CAMLP4O,camlp4o,camlp4o,no)
if test "$CAMLP4O" = no ; then
	AC_MSG_ERROR(Cannot find camlp4o.)
fi

if expr "$OCAMLVERSION" '>=' '3.08' > /dev/null ; then
   ODOC_DEF="-D OCAML_308"
fi
AC_SUBST(ODOC_DEF)

# Check for which kind of threads is used
AC_MSG_CHECKING(for ocaml threads)
AC_ARG_WITH(threads,
        [  --with-threads=(yes|system|vm|no)  which threads to use ],
        THREADS_LIB="$withval",
        THREADS_LIB="yes")
if (test "$THREADS_LIB" = yes || test "$THREADS_LIB" = system) && \
   test -r "$OCAMLLIB/threads/threads.cma"; then
  THREADS_LIB="system"
elif (test "$THREADS_LIB" = yes || test "$THREADS_LIB" = vm) && \
   test -r "$OCAMLLIB/vmthreads/stdlib.cma"; then
  THREADS_LIB="vm"
elif test "$THREADS_LIB" = yes || test "$THREADS_LIB" = no; then
  THREADS_LIB="no"
else
  echo; AC_MSG_ERROR(Cannot use $THREADS_LIB threads)
fi
AC_MSG_RESULT(use $THREADS_LIB threads)

# Check for dll support
HAS_DLL_SUPPORT="no"
AC_MSG_CHECKING(for ocaml dll support)
if test -r "$OCAMLLIB/stublibs/dllunix.so" ||
   test -r "$OCAMLLIB/stublibs/dllunix.dll"
then HAS_DLL_SUPPORT="yes"
fi
AC_MSG_RESULT($HAS_DLL_SUPPORT)

AC_PROG_RANLIB
# get the C compiler used by ocamlc
if test -z "$CC" ; then
  touch conftest.c
  CC=$($CAMLC -verbose -c conftest.c 2>&1 | sed ['s/^+ \([^ ]*\) .*$/\1/'])
  echo [OCaml uses $CC to compile C files]
fi
AC_PROG_CC

# platform
AC_MSG_CHECKING(platform)
echo "print_endline Sys.os_type ;;" > conftest.ml
ac_ocaml_platform=$(ocaml conftest.ml)
AC_MSG_RESULT($ac_ocaml_platform)
if test $ac_ocaml_platform = Win32 ; then
    OCAMLWIN32=yes
    EXE=.exe
else
    OCAMLWIN32=no
    EXE=
fi

# GTK 2 auto configuration

GTKPKG=gtk+-2.0 
AM_PATH_GTK_2_0(2.0.0, :, AC_MSG_ERROR(GTK+ is required))

dnl LABLGTK_PKG(variable, autoconf package, help string, pkgconfig package)
AC_DEFUN([LABLGTK_PKG], [
AC_ARG_WITH($2,[$3],USE_$1=$withval; FORCE_$1=yes, USE_$1=yes; FORCE_$1=no)
if test $USE_$1 = yes ; then
	PKG_CHECK_MODULES($1,$4,,[
	if test $FORCE_$1 = yes ; then
	  AC_MSG_ERROR($2 enforced but no support found)
	else
	  AC_MSG_RESULT(no)
	USE_$1=no
	fi])
fi
if test $USE_$1 = yes ; then
	USE_$1=1
	$1[]PKG=$4
else
	unset USE_$1
fi
AC_SUBST(USE_$1)])


LABLGTK_PKG(GTKGL, gl,
	    [  --without-gl            override autodetected GtkGLArea support. Requires LablGL],
	    gtkgl-2.0)
# Check for LablGL
if test -n "$USE_GTKGL" ; then
      AC_MSG_CHECKING(lablGL directory)
      cat > conftest.ml << EOF
      open Raw
EOF
      if $CAMLC -c -I "${LABLGLDIR:=+lablGL}" conftest.ml > /dev/null 2>&1 ; then
        AC_MSG_RESULT($LABLGLDIR)
      else
        if test $FORCE_GTKGL = yes ; then
	  AC_MSG_ERROR(gtkgl enforced but lablGL not found)
	else
	  AC_MSG_RESULT(no)
      	  unset USE_GTKGL
	  unset GTKGLPKG
          unset LABLGLDIR
	fi
      fi
fi

LABLGTK_PKG(GLADE, glade,
            [  --without-glade         override autodetected libglade support],
            libglade-2.0)

LABLGTK_PKG(RSVG, rsvg,
            [  --without-rsvg          override autodetected librsvg support],
            librsvg-2.0)
# Check for SVGZ support
if test -n "$USE_RSVG" ; then
    ac_ocaml_libs="$LIBS"
    LIBS="$LIBS $RSVG_LIBS"
    AC_CHECK_FUNC(rsvg_handle_new_gz, [HAVE_SVGZ=-DHAVE_SVGZ], [unset HAVE_SVGZ])
    LIBS="$ac_ocaml_libs"
else
    unset HAVE_SVGZ
fi

LABLGTK_PKG(GNOMECANVAS, gnomecanvas,
            [  --without-gnomecanvas   override autodetected libgnomecanvas support],
            libgnomecanvas-2.0)

LABLGTK_PKG(GNOMEUI, gnomeui,
            [  --without-gnomeui       override autodetected libgnomeui support],
            libgnomeui-2.0)

LABLGTK_PKG(PANEL, panel,
            [  --without-panel         override autodetected libpanelapplet support],
            libpanelapplet-2.0)

LABLGTK_PKG(GTKSPELL, gtkspell,
            [  --without-gtkspell      override autodetected gtkspell support],
            gtkspell-2.0)

PKG_CHECK_MODULES(GTKALL,$GTKPKG $GTKGLPKG $GLADEPKG $RSVGPKG $GNOMECANVASPKG $GNOMEUIPKG $PANELPKG $GTKSPELLPKG)

AC_ARG_ENABLE(debug,
        [  --enable-debug          enable debug mode],
	AC_MSG_RESULT(Debug mode enabled) ; DEBUG=1,
	DEBUG=)

# substitutions to perform

AC_SUBST(EXE)
AC_SUBST(LIBDIR)
AC_SUBST(OCAMLBEST)
AC_SUBST(OCAMLWIN32)
AC_SUBST(OCAMLDEP)
AC_SUBST(OCAMLRUN)
AC_SUBST(OCAMLLEX)
AC_SUBST(OCAMLYACC)
AC_SUBST(THREADS_LIB)
AC_SUBST(HAS_DLL_SUPPORT)

AC_SUBST(CAMLC)
AC_SUBST(CAMLOPT)
AC_SUBST(OCAMLDOC)
AC_SUBST(CAMLMKTOP)
AC_SUBST(CAMLMKLIB)
AC_SUBST(CAMLP4O)
AC_SUBST(LABLGLDIR)
AC_SUBST(HAVE_SVGZ)
AC_SUBST(USE_CC)
AC_SUBST(DEBUG)

# Finally create the config.make from config.make.in
AC_OUTPUT(config.make)
chmod a-w config.make

AC_DEFUN([CONF_SUMMARY], [
echo -n "	$1	"
if test -n "$USE_$2"
then echo "yes"
else if test "$FORCE_$2" = "yes"
     then echo "disabled"
     else echo "not found"
     fi
fi])

echo ; echo "LablGTK configuration:"
echo "	threads		$THREADS_LIB"
CONF_SUMMARY(GtkGLArea, GTKGL)
CONF_SUMMARY(libglade, GLADE)
CONF_SUMMARY(librsvg , RSVG)
CONF_SUMMARY(libgnomecanvas, GNOMECANVAS)
CONF_SUMMARY(libgnomeui, GNOMEUI)
CONF_SUMMARY(libpanelapplet, PANEL)
CONF_SUMMARY(gtkspell, GTKSPELL)
echo
echo -n  "	debug   	"
if test -n "$DEBUG" ; then echo "yes" ; else echo "no" ; fi
echo -e  "	C compiler	$CC"