# -*- mode: shell-script -*-
AC_INIT(main/inferno.c)

AC_VALIDATE_CACHED_SYSTEM_TUPLE(
        rm $cache_file
        echo restart configure
        exit 1
)

AM_CONFIG_HEADER(conf.h)
AM_INIT_AUTOMAKE(d2x, 0.1.1)

AM_MAINTAINER_MODE

AC_PROG_INSTALL
AC_CHECK_TOOL(CC, gcc, :)
AC_ISC_POSIX
AC_CHECK_TOOL(RANLIB, ranlib, :)
AC_CHECK_TOOL(AR, ar, :)
AC_STDC_HEADERS

NO_ASM=0
NO_NETWORK=0
GL_LIBS="GL GLU"
NASM_PROG=nasm

AC_CYGWIN
if test x$CYGWIN = xyes; then
    AC_MSG_WARN([Cygwin found, setting -mno-cygwin])
    CFLAGS="$CFLAGS -mno-cygwin"
fi

AC_MINGW32
AM_CONDITIONAL(MINGW32, test x$MINGW32 = xyes)
if test x$MINGW32 = xyes; then
    AC_MSG_WARN([mingw32 found, disabling network])
    NO_NETWORK=1
    GL_LIBS="opengl32 glu32"
    NASM_PROG=nasmw
fi

CFLAGS="$CFLAGS -g -O2 -Wall"

dnl Count warnings as errors?
AC_ARG_WITH(werror,
  [  --with-werror                Count compiler warning as errors ],
  [case "${withval}" in
    yes) CFLAGS="-Werror $CFLAGS" ;;
    no)  ;;
    *) AC_MSG_ERROR(bad value ${withval} for --with-werror) ;;
  esac],)

dnl Build with NDEBUG?
AC_ARG_WITH(ndebug,
  [  --with-ndebug                Take out extra Asserts, Int3, etc ],
  [case "${withval}" in
    yes) AC_DEFINE(NDEBUG) ;;
    no)  ;;
    *) AC_MSG_ERROR(bad value ${withval} for --with-ndebug) ;;
  esac],)

# Test for DJGPP
AM_CONDITIONAL(ENV_DJGPP, test "$host_os" = "msdosdjgpp")
if test "$host_os" = "msdosdjgpp"; then

  CFLAGS="-I \$(top_srcdir)/arch/dos/include $CFLAGS"
  AC_PATH_PROG(NASM, nasm, no)
  TARGETS=d2x

else
  CFLAGS="-pipe $CFLAGS"

  case "$host_os" in
    *linux*) AC_DEFINE(__ENV_LINUX__) ;;
  esac

  dnl Check for SDL
  AM_PATH_SDL(1.1.7,
    :,
    AC_MSG_ERROR(SDL not found. Make sure sdl-config is in your PATH, or specify with --with-sdl-prefix)
  )
  AC_SUBST(SDL_LIBS)

  AC_CHECK_HEADERS(netipx/ipx.h)

  # Check for OpenGL
  AC_ARG_WITH(opengl,
    [  --with-opengl                Build OpenGL support ],
    [case "${withval}" in
      yes) opengl=true ;;
      no)  opengl=false ;;
      *) AC_MSG_ERROR(bad value ${withval} for --with-opengl) ;;
    esac],[opengl=false])

  if test x$opengl = xtrue; then
    for lib in $GL_LIBS; do
	AC_CHECK_LIB($lib, main,
	    OGL_LIBS="${OGL_LIBS} -l$lib",
	    [AC_MSG_ERROR([$lib not found, --with-opengl cannot be used])
	    opengl=false],
	    ${OGL_LIBS}
	)
    done
  fi
  AC_SUBST(OGL_LIBS)
  AM_CONDITIONAL(USE_OPENGL, test x$opengl = xtrue)

  CFLAGS="$SDL_CFLAGS $CFLAGS"

  # Check for GGI
  AC_ARG_WITH(ggi,
    [  --with-ggi                   Build GGI support ],
    [case "${withval}" in
      yes) ggi=true ;;
      no)  ggi=false ;;
      *)   AC_MSG_ERROR(bad value ${withval} for --with-ggi) ;;
    esac],[ggi=false])

  if test x$ggi = xtrue; then
    AC_CHECK_LIB(ggi, ggiInit,
      GGI_LIBS="-lggi",
      [AC_MSG_ERROR([GGI not found, GGI version cannot be built]); ggi=false])
    AC_CHECK_LIB(gii, giiInit,
      GGI_LIBS="${GGI_LIBS} -lgii",
      [AC_MSG_ERROR([GII not found, GGI version cannot be built]); ggi=false])
  fi
  AC_SUBST(GGI_LIBS)
  AM_CONDITIONAL(USE_GGI, test x$ggi = xtrue)

  # Check for SVGALib
  AC_ARG_WITH(svga,
    [  --with-svga                  Build SVGALib support ],
    [case "${withval}" in
      yes) svga=true ;;
      no)  svga=false ;;
      *) AC_MSG_ERROR(bad value ${withval} for --with-svga) ;;
    esac],[svga=false])

  if test x$svga = xtrue; then
    AC_CHECK_LIB(vga, vga_getmousetype,
      SVGA_LIBS="-lvga",
      [AC_MSG_ERROR([vga not found, SVGALib cannot be built])
       svga=false],
       )
    AC_CHECK_LIB(vgagl,gl_getcontext,
      SVGA_LIBS="${SVGA_LIBS} -lvgagl",
      [AC_MSG_ERROR([vgagl not found, SVGALib cannot be built])
       svga=false],
       -lvga)
  fi
  AC_SUBST(SVGA_LIBS)
  AM_CONDITIONAL(USE_SVGALIB, test x$svga = xtrue)

  if test x$opengl = xtrue; then
    AC_DEFINE(OGL)
    TARGETS=d2x-ogl
  else
    if test x$svga = xtrue; then
      AC_DEFINE(SVGA)
      TARGETS=d2x-svga
    else
      if test x$ggi = xtrue; then
        AC_DEFINE(GGI)
        TARGETS=d2x-ggi
      else
        TARGETS=d2x-sdl
      fi
    fi
  fi

  AC_PATH_PROG(NASM, $NASM_PROG, no)
  CFLAGS="-I\$(top_srcdir)/input/linux/include -I\$(top_srcdir)/arch/linux/include $CFLAGS"

fi

# Check for NASM and network
AC_ARG_WITH(assembler,
  [  --without-assembler          Do not use assembler optimization ],
      if test x$withval = xno; then
        NO_ASM=1
      fi)
AC_ARG_WITH(network,
  [  --without-network            Do not build network/serial support ],
      if test x$withval = xno; then
        NO_NETWORK=1
      fi)
      
if test "$NASM" = "no"; then
        NO_ASM=1 
fi
if test "$NO_ASM" = 1; then
        AC_DEFINE(NO_ASM)
        NASMFLAGS=""
else
        NASMFLAGS="-i\$(srcdir)/ $NASMFLAGS"
        case $host_os in
          cygwin)
              NASMFLAGS="-f win32 $NASMFLAGS"
              ;;
	  msdosdjgpp)
	      NASMFLAGS="-f coff -i\$(srcdir)/"
	      ;;
          linux*)
              NASMFLAGS="-f elf -d__ENV_LINUX__ -i\$(srcdir)/"
              ;;
	  *)
	      AC_MSG_ERROR([Assembler not supported for this OS])
        esac
fi  
if test "$NO_NETWORK" = 0; then
        AC_DEFINE(NETWORK)
fi
AM_CONDITIONAL(USE_ASM, test "$NO_ASM" != 1)
AM_CONDITIONAL(USE_NETWORK, test "$NO_NETWORK" != 1)

AC_SUBST(NASMFLAGS)

AC_SUBST(CFLAGS)

AC_SUBST(TARGETS)

AC_ARG_PROGRAM

#libdir='$(shell pwd)/${top_srcdir}/main'
AC_OUTPUT(
Makefile
2d/Makefile
3d/Makefile
arch/Makefile
cfile/Makefile
iff/Makefile
input/Makefile
main/Makefile
maths/Makefile
mem/Makefile
misc/Makefile
sound/Makefile
texmap/Makefile
video/Makefile
)