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

AC_PREREQ(2.56)
AC_INIT([warzone], [1.99], [http://developer.berlios.de/projects/warzone/])
AC_CONFIG_SRCDIR([lib/gamelib/anim.h])
AC_CONFIG_HEADER([config.h])
AC_CANONICAL_TARGET

AM_INIT_AUTOMAKE
AM_MAINTAINER_MODE

# Checks for programs.
AC_PROG_CC
AC_PROG_RANLIB
AC_PROG_YACC
AC_PROG_LEX

# Checks for libraries.

# Checks for header files.
AC_HEADER_DIRENT
AC_HEADER_STDC
AC_CHECK_HEADERS([limits.h malloc.h memory.h stddef.h stdint.h stdlib.h string.h unistd.h])

# Checks for typedefs, structures, and compiler characteristics.
AC_HEADER_STDBOOL
AC_C_CONST
AC_C_INLINE
AC_TYPE_SIZE_T
AC_STRUCT_TM

# Checks for library functions.
AC_FUNC_CLOSEDIR_VOID
AC_FUNC_MALLOC
AC_FUNC_MEMCMP
AC_FUNC_REALLOC
AC_FUNC_STAT
AC_FUNC_VPRINTF
AC_CHECK_FUNCS([gethostname memmove memset sqrt strchr strdup strncasecmp strrchr strstr])
AC_HEADER_STDBOOL
AC_HEADER_TIME

AC_ARG_ENABLE(make_data,
[  --disable-make-data     do not recurse make into data directories
                          (ok to disable unless you will 'make install')],
[case "${enableval}" in
  yes) make_data=true ;;
  no)  make_data=false ;;
  *)   AC_MSG_ERROR(bad value ${enableval} for --disable-make-data) ;;
esac], [make_data=true])
AM_CONDITIONAL(MAKE_DATA, test x$make_data = xtrue)

AC_CHECK_LIB(m, pow)

AC_CHECK_LIB(z, gzgets, ,
  AC_MSG_ERROR([Could not find zlib library.]), )
AC_CHECK_HEADER(zlib.h, ,
  AC_MSG_ERROR([zlib found but not zlib.h.
You may need to install a zlib \"development\" package.]))
WZ_LIBS="$WZ_LIBS -lz"

AC_ARG_ENABLE(debug,
[  --enable-debug          run in debug mode],
[ debug=$enableval ], [ debug=no ])
AC_MSG_CHECKING([debug mode])
if test "$debug" = yes; then
  # -O0 turns off all optimizations; this is necessary for accurate debugging
  CFLAGS="-O0 -g3 -Wall"
  AC_DEFINE(DEBUG, 1, [Define if you want extra debugging.])
  AC_MSG_RESULT([yes])
else
  AC_MSG_RESULT([no])
fi

#   --without-opengl will build without opengl
AC_ARG_WITH(opengl,
[  --with-opengl           use OpenGL to accelerate graphics (default)],
[ opengl=$withval ], [ opengl=maybe ])

#   --without-openal will build without OpenAL
# Commented out as OpenAL is not curently an option,
# but it will need to become optional someday.
#AC_ARG_WITH(openal,
#[  --with-openal           use OpenAL for sound (default)],
#[ openal=$withval ], [ openal=yes ])

#   --with-cda will build with audio CD support
AC_ARG_WITH(cda,
[  --with-cda              built support for audio CD],
[ cda=$withval ], [ cda=no ])

#   --without-ogg will build without Ogg vorbis support
AC_ARG_WITH(ogg,
[  --with-ogg              built support for Ogg files (default)],
[ ogg=$withval ], [ ogg=yes ])

#   --without-mp3 will build without MP3 support
AC_ARG_WITH(mp3,
[  --with-mp3              built support for Mp3 files (default)],
[ mp3=$withval ], [ mp3=yes ])

# windows conditional
case $host_os in
  *mingw32* ) MINGW32=yes;;
          * ) MINGW32=no;;
esac
if test x"$MINGW32" = "xyes"; then
  AC_DEFINE(WIN32, 1, [Windows build])
  LIBS="$LIBS -lmingw32"
fi

dnl WZ_EXPAND_DIR(VARNAME, DIR)
dnl expands occurrences of ${prefix} and ${exec_prefix} in the given DIR,
dnl and assigns the resulting string to VARNAME
dnl example: WZ_EXPAND_DIR(LOCALEDIR, "$datadir/locale")
dnl eg, then: AC_DEFINE_UNQUOTED(LOCALEDIR, "$LOCALEDIR")
dnl by Alexandre Oliva
dnl from http://www.cygnus.com/ml/automake/1998-Aug/0040.html
AC_DEFUN([WZ_EXPAND_DIR], [
        $1=$2
        $1=`(
            test "x$prefix" = xNONE && prefix="$ac_default_prefix"
            test "x$exec_prefix" = xNONE && exec_prefix="${prefix}"
            eval echo \""[$]$1"\"
        )`
])
dnl export where the datadir is going to be installed; we will look for
dnl $datadir/warzone/warzone.wz
WZ_EXPAND_DIR(datadir, "$datadir/warzone")
AC_DEFINE_UNQUOTED(DEFAULT_DATA_DIR, "$datadir", [Warzone data path])

AM_PATH_SDL([1.1.4], [sdl_found="yes"], [sdl_found="no"])
if test "$sdl_found" = yes; then
  WZ_CPPFLAGS="$CPPFLAGS $SDL_CFLAGS"
  WZ_CFLAGS="$CFLAGS $SDL_CFLAGS"
  WZ_LIBS="$WZ_LIBS $SDL_LIBS"
else
  AC_MSG_ERROR([You need to install SDL (http://www.libsdl.org/).])
fi

AC_PATH_SDLNET([
	WZ_CPPFLAGS="$WZ_CPPFLAGS $SDLNETINC" WZ_LIBS="$WZ_LIBS $SDLNETLIB"],
	AC_MSG_ERROR(SDL_net is not installed))

if test "x$opengl" != xno; then
  AC_CHECK_HEADER(GL/gl.h, GL_h=yes, GL_h=no)
  AC_CHECK_HEADER(GL/glu.h, GLU_h=yes, GLU_h=no)
  GL_lib=yes
  AC_CHECK_LIB(GL, main, GLLIB=GL, 
               [AC_CHECK_LIB(opengl32, main, GLLIB=opengl32, GL_lib=no)])
  GLU_lib=yes
  AC_CHECK_LIB(GLU, main, GLULIB=GLU, 
               [AC_CHECK_LIB(glu32, main, GLULIB=glu32, GLU_lib=no)])
  if test "x$GL_lib" = "xno" -o "x$GLU_lib" = "xno"; then
    if test "x$opengl" = xyes; then
      AC_MSG_ERROR([You need to install OpenGL and GLU.])
    else
      opengl=no
    fi
  else
    if test "x$GL_h" = "xno" -o "x$GLU_h" = "xno"; then
      if test "x$opengl" = xyes; then
        AC_MSG_ERROR([You need to install OpenGL and GLU header files (usually a -dev package).])
      else
        opengl=no
      fi
    else
      opengl=yes
    fi
  fi
fi
AC_CHECK_LIB(jpeg, main, , [AC_MSG_ERROR([You need to install the jpeg library.])])
AC_CHECK_LIB(png, main, , [AC_MSG_ERROR([You need to install the png library.])])
AC_MSG_CHECKING([OpenGL])
if test "x$opengl" = xyes; then
  AC_DEFINE(WZ_OPENGL, 1, [OpenGL acceleration])
  WZ_LIBS="$WZ_LIBS -l$GLLIB -l$GLULIB"
  AC_SUBST(RENDERER, "ivis_opengl")
  AC_MSG_RESULT([yes])
else
  AC_SUBST(RENDERER, "ivis02")
  AC_MSG_RESULT([no])
fi

if test "x$openal" != xno; then
  AC_CHECK_HEADER(AL/al.h, AL_h=yes, AL_h=no)
  AL_lib=yes
  AC_CHECK_LIB(openal, main, ALLIB=openal, 
               [AC_CHECK_LIB(openal32, main, ALLIB=openal32, AL_lib=no)])
  # On Windows (and perhaps some other platforms), Alut is a separate library
  AC_CHECK_LIB(alut, main, ALUTLIB="-lalut", ALUTLIB="")
  AC_CHECK_HEADER(AL/alut.h, ALUT_H=yes, ALUT_H=no)
  if test "x$AL_lib" = "xno"; then
    if test "x$openal" = xyes; then
      AC_MSG_ERROR([You need to install OpenAL.])
    else
      openal=no
    fi
  else
    if test "x$AL_h" = "xno"; then
      if test "x$openal" = xyes; then
        AC_MSG_ERROR([You need to install OpenAL header files (usually a -dev package).])
      else
        openal=no
      fi
    else
      openal=yes
    fi
  fi
fi
AC_MSG_CHECKING([OpenAL])
if test "x$ALUT_H" = "xyes"; then
  AC_DEFINE(WZ_ALUT_H, 1, [Use Alut headers])
fi
if test "x$openal" = xyes; then
  WZ_LIBS="$WZ_LIBS -l$ALLIB $ALUTLIB"
  AC_DEFINE(WZ_OPENAL, 1, [OpenAL support])
  AC_MSG_RESULT([yes])
else
  AC_MSG_RESULT([no])
  AC_MSG_ERROR([OpenAL is currently mandatory])
fi

# Look for PhysicsFS
AC_CHECK_LIB(physfs, PHYSFS_init, , AC_MSG_ERROR([PhysicsFS not found]))
AC_CHECK_HEADER(physfs.h, , AC_MSG_ERROR([PhysicsFS header not found]))

oggmusic=no
mp3music=no
if test "x$cda" = "xyes"
then
  AC_DEFINE(WZ_CDA, 1, [Audio CD support])
else
  if test "x$ogg" = "xyes"
  then
    AM_PATH_OGG(have_ogg=yes, have_ogg=no)
    AM_PATH_VORBIS(have_vorbis=yes, have_vorbis=no)
    if test "x$have_ogg" = "xyes"
    then
      if test "x$have_vorbis" = "xyes"
      then
        oggmusic=yes
        WZ_LIBS="$WZ_LIBS -lvorbisfile -lvorbis -logg"
      else
        AC_DEFINE(WZ_NOOGG, 1, [Disable ogg vorbis support])
      fi
    else
      AC_DEFINE(WZ_NOOGG, 1, [Disable ogg vorbis support])
    fi
  else
    AC_DEFINE(WZ_NOOGG, 1, [Disable ogg vorbis support])
  fi

  if test "x$mp3" = "xyes"
  then
    AC_CHECK_LIB(mad,
		 mad_stream_init,
		 LIBS="$LIBS -lmad"; mp3music=yes,
		 AC_DEFINE(WZ_NOMP3, 1, [Disable mp3 support]),)
  else
    AC_DEFINE(WZ_NOMP3, 1, [Disable mp3 support])
  fi
fi

# add some required C flags here
# -DYY_STATIC is required by flex
# -m32 forces 32-bit compile, since code is not clean enough for 64-bit yet
CFLAGS="$CFLAGS -Wall -DYY_STATIC -m32 -fno-strict-aliasing"

# Set flex flags. The -olex.yy.c kludge is to ensure that flex
# generates the kind of filename that automake expects.
AC_SUBST(FLEX_FLAGS, "-olex.yy.c")

# only now set the LIBS/CFLAGS/CPPFLAGS lines, if set earlier it will give 
# strange error messages when something is wrong
LIBS="$LIBS $WZ_LIBS"
CFLAGS="$CFLAGS $WZ_CFLAGS"
CPPFLAGS="$CPPFLAGS $WZ_CPPFLAGS"

AC_CONFIG_FILES([Makefile
                 lib/Makefile
                 lib/framework/Makefile
                 lib/gamelib/Makefile
                 lib/ivis_opengl/Makefile
                 lib/ivis02/Makefile
                 lib/ivis_common/Makefile
                 lib/netplay/Makefile
                 lib/script/Makefile
                 lib/sequence/Makefile
                 lib/sound/Makefile
                 lib/widget/Makefile
                 data/Makefile
                 src/Makefile
                 autopackage/default.apspec])
AC_OUTPUT

echo ""
echo "Warzone will compile with the following components:"
echo ""
echo " OpenGL acceleration:   $opengl"
echo " OpenAL sound system:   $openal"
echo " Audio CD support:      $cda"
echo " MP3 music support:     $mp3music"
echo " OGG music support:     $oggmusic"
echo ""

if test "x$debug" = xyes; then
  echo " *** Running in debug mode! ***"
  echo ""
fi