#  Copyright 2005 Adam Jackson.
#
#  Permission is hereby granted, free of charge, to any person obtaining a
#  copy of this software and associated documentation files (the "Software"),
#  to deal in the Software without restriction, including without limitation
#  on the rights to use, copy, modify, merge, publish, distribute, sub
#  license, and/or sell copies of the Software, and to permit persons to whom
#  the Software is furnished to do so, subject to the following conditions:
#
#  The above copyright notice and this permission notice (including the next
#  paragraph) shall be included in all copies or substantial portions of the
#  Software.
#
#  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
#  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
#  FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
#  ADAM JACKSON BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
#  IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
#  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#
# Process this file with autoconf to produce a configure script

# Initialize Autoconf
AC_PREREQ([2.60])
AC_INIT([xf86-video-mga],
        [1.6.901],
        [https://gitlab.freedesktop.org/xorg/driver/xf86-video-mga/issues],
        [xf86-video-mga])
AC_CONFIG_SRCDIR([Makefile.am])
AC_CONFIG_HEADERS([config.h])

# Require X.Org macros 1.8 or later for MAN_SUBSTS set by XORG_MANPAGE_SECTIONS
m4_ifndef([XORG_MACROS_VERSION],
          [m4_fatal([must install xorg-macros 1.8 or later before running autoconf/autogen])])
XORG_MACROS_VERSION(1.8)
XORG_DEFAULT_OPTIONS

AC_CONFIG_AUX_DIR(.)

# Initialize Automake
AM_INIT_AUTOMAKE([foreign dist-bzip2])

# Initialize libtool
AC_DISABLE_STATIC
AC_PROG_LIBTOOL

AH_TOP([#include "xorg-server.h"])

# Define a configure option for an alternate module directory
AC_ARG_WITH(xorg-module-dir,
            AS_HELP_STRING([--with-xorg-module-dir=DIR],
                           [Default xorg module directory [[default=$libdir/xorg/modules]]]),
            [moduledir="$withval"],
            [moduledir="$libdir/xorg/modules"])

AC_ARG_ENABLE(dri, AS_HELP_STRING([--disable-dri],
                                  [Disable DRI support [[default=auto]]]),
              [DRI="$enableval"],
              [DRI=auto])
AC_ARG_ENABLE(exa,
              AS_HELP_STRING([--disable-exa],
                             [Disable EXA support [[default=enabled]]]),
              [EXA="$enableval"],
              [EXA=yes])

# Store the list of server defined optional extensions in REQUIRED_MODULES
XORG_DRIVER_CHECK_EXT(RANDR, randrproto)
XORG_DRIVER_CHECK_EXT(RENDER, renderproto)
XORG_DRIVER_CHECK_EXT(XV, videoproto)
XORG_DRIVER_CHECK_EXT(DPMSExtension, xextproto)

# Obtain compiler/linker options for the driver dependencies
PKG_CHECK_MODULES(XORG, [xorg-server >= 1.1.0 xproto fontsproto $REQUIRED_MODULES])
sdkdir=`$PKG_CONFIG --variable=sdkdir xorg-server`

# Checks for libraries.

if test "x$DRI" != xno; then
        AC_CHECK_FILE([${sdkdir}/dri.h],
                      [have_dri_h="yes"], [have_dri_h="no"])
        AC_CHECK_FILE([${sdkdir}/sarea.h],
                      [have_sarea_h="yes"], [have_sarea_h="no"])
        AC_CHECK_FILE([${sdkdir}/dristruct.h],
                      [have_dristruct_h="yes"], [have_dristruct_h="no"])
fi

AC_MSG_CHECKING([whether to include DRI support])
if test "x$DRI" = xauto; then
        if test "x$have_dri_h" = xyes && \
           test "x$have_sarea_h" = xyes && \
           test "x$have_dristruct_h" = xyes; then
                DRI="yes"
        else
                DRI="no"
        fi
fi
AC_MSG_RESULT([$DRI])

AM_CONDITIONAL(DRI, test "x$DRI" = xyes)
if test "x$DRI" = xyes; then
        PKG_CHECK_MODULES(DRI, [libdrm >= 2.0 xf86driproto])
        AC_DEFINE(MGADRI,1,[Enable DRI driver support])
        AC_DEFINE(MGADRI_DEVEL,1,[Enable developmental DRI driver support])
fi

save_CFLAGS="$CFLAGS"
CFLAGS="$XORG_CFLAGS"
AC_CHECK_DECL(XSERVER_LIBPCIACCESS,
              [XSERVER_LIBPCIACCESS=yes], [XSERVER_LIBPCIACCESS=no],
              [#include "xorg-server.h"])
CFLAGS="$save_CFLAGS"

save_CFLAGS="$CFLAGS"
CFLAGS="$XORG_CFLAGS"
AC_CHECK_DECL(xf86ModeBandwidth,
	      [AC_DEFINE(HAVE_XF86MODEBANDWIDTH, 1, [Have xf86ModeBandwidth])],
	      [],
	      [#include <X11/extensions/randr.h>
	       #include "xorg-server.h"
	       #include "xf86Modes.h"])
CFLAGS="$save_CFLAGS"

if test "x$XSERVER_LIBPCIACCESS" = xyes; then
    PKG_CHECK_MODULES([PCIACCESS], [pciaccess >= 0.8.0])
fi
AM_CONDITIONAL(XSERVER_LIBPCIACCESS, test "x$XSERVER_LIBPCIACCESS" = xyes)


AC_ARG_ENABLE(xaa,
              AS_HELP_STRING([--enable-xaa],
                             [Enable legacy X Acceleration Architecture (XAA) [default=auto]]),
              [XAA="$enableval"],
              [XAA=auto])
if test "x$XAA" != xno; then
        save_CFLAGS=$CFLAGS
        save_CPPFLAGS=$CPPFLAGS
        CFLAGS=$XORG_CFLAGS
        CPPFLAGS="$XORG_CFLAGS"
        AC_CHECK_HEADERS([xaa.h], XAA=yes, XAA=no)
        CFLAGS=$save_CFLAGS
        CPPFLAGS=$save_CPPFLAGS
fi
AC_MSG_CHECKING([whether to include XAA support])
AM_CONDITIONAL(XAA, test "x$XAA" = xyes)
AC_MSG_RESULT([$XAA])
if test "x$XAA" = xyes; then
        AC_DEFINE(USE_XAA, 1, [Build support for XAA])
fi

# Properly handle EXA.
AC_MSG_CHECKING([whether to enable EXA support])
if test "x$EXA" = xyes; then
    AC_MSG_RESULT(yes)

    SAVE_CPPFLAGS="$CPPFLAGS"
    CPPFLAGS="$CPPFLAGS $XORG_CFLAGS"
    AC_CHECK_HEADERS(exa.h,
                   [have_exa_h="yes"], [have_exa_h="no"],
                   [#include "xorg-server.h"])
    CPPFLAGS="$SAVE_CPPFLAGS"
else
    AC_MSG_RESULT(no)
fi 

SAVE_CPPFLAGS="$CPPFLAGS"
CPPFLAGS="$CPPFLAGS $XORG_CFLAGS"
if test "x$have_exa_h" = xyes; then
    AC_MSG_CHECKING([whether EXA version is at least 2.0.0])
    AC_PREPROC_IFELSE([AC_LANG_PROGRAM([[
#include "xorg-server.h"
#include "exa.h"
#if EXA_VERSION_MAJOR < 2
#error OLD EXA!
#endif
                      ]])],
                      [USE_EXA=yes],
                      [USE_EXA=no])
    AC_MSG_RESULT($USE_EXA)

    if test "x$USE_EXA" = xyes; then
        AC_DEFINE(USE_EXA, 1, [Build support for Exa])
    fi
fi
CPPFLAGS="$SAVE_CPPFLAGS"

AM_CONDITIONAL(USE_EXA, test "x$USE_EXA" = xyes)

AC_SUBST([moduledir])

DRIVER_NAME=mga
AC_SUBST([DRIVER_NAME])

AC_CONFIG_FILES([
                Makefile
                src/Makefile
                man/Makefile
                util/Makefile
])
AC_OUTPUT