do ifopt help
  echo  Available options are:
  echo .    debug     - Build debug instead of release
  echo .    verbose   - Show system commands instead of decorated messages
  echo .    clean     - Clean temp files (use with debug to clean debug files)
  echo .    zdoom.wad - (Re)build just zdoom.wad, even if it already exists
  echo .
  echo  To use with MinGW, compile cbuild.c into an executable using:
  echo  gcc -O2 -W -Wall -Werror -o cbuild.exe cbuild.c
  echo .
  echo  Or if you have a sh-compatible shell, you can run the cbuild.c file
  echo  directly or have it automatically compile itself with GCC by passing
  echo  --make-compiled
  echo .
  exit 0
done

# Here's the main script. All commands are case in-sensitive.

# 'Ifopt' will check if the following word was passed on the command line, and execute the
# rest of the line if so. The reverse, 'ifnopt', also exists.

ifopt verbose  verbose 1
ifopt debug  CONFIG = Debug

# VAR?=foo will only set the var if it's unset. Note that if you want spaces, put '' or ""
# quotes around the value. VAR+=foo will append foo to the very end of the existing var.
# And, VAR-=foo will remove all occurences of foo from the var.
CONFIG ?= Release

OPTLEVEL ?= 2
ARCH_TYPE ?= pentium
TUNE_TYPE ?= athlon-xp

RELEASETARGET ?= zdoomgcc
DEBUGTARGET ?= zdoomgccd

DEBUGOBJDIR = debugobj
RELEASEOBJDIR = releaseobj


CPPFLAGS = "-DHAVE_FILELENGTH -D__forceinline=inline -Izlib -IFLAC -Isrc -Isrc/sdl -Isrc/g_doom -Isrc/g_heretic -Isrc/g_hexen -Isrc/g_raven -Isrc/g_strife -Isrc/g_shared -Isrc/oplsynth -Isrc/sound"
LDFLAGS = "-lFLAC++ -lFLAC -lz -lfmod `sdl-config --libs`"
CFLAGS = "`sdl-config --cflags` "

do ifopt debug
  OBJDIR = "${DEBUGOBJDIR}"
  CFLAGS += "-Wall -Wno-unused -g3"
  CPPFLAGS += " -D_DEBUG"
  CXXFLAGS = "${CFLAGS}"
  NASMFLAGS = "-g"
  TARGET = "${DEBUGTARGET}"
else
  OBJDIR = "${RELEASEOBJDIR}"
  CFLAGS += "-march=${ARCH_TYPE} -mtune=${TUNE_TYPE} -Wall -Wno-unused -O${OPTLEVEL} -fomit-frame-pointer"
  CPPFLAGS += " -DNDEBUG"
  CXXFLAGS = "${CFLAGS}"
  LDFLAGS += " -Wl,-Map=zdoomgcc.map"
  TARGET = "${RELEASETARGET}"
done

ifnplat win32  CPPFLAGS += " -Dstricmp=strcasecmp -Dstrnicmp=strncasecmp"

# This is where the object and dependancy files go when compiled
OBJ_DIR = "${OBJDIR}"
DEP_DIR = "${OBJDIR}"

do ifnopt clean
  EVILCLEAN = 0
  ifnexist "${OBJ_DIR}"  mkdir "${OBJ_DIR}"

  ifopt zdoom.wad  goto makewad

  do if "${NOASM}"=""
    do ifplat win32
       NASM ?= nasmw
       NASMFLAGS += -f win32
    else ifplat unix
       NASM ?= nasm
       NASMFLAGS += -f elf -DM_TARGET_LINUX
    else
      echo .
      echo Unsupported platform!
      echo .
      exit 1
    done
    # 'loadlist' stores a list of words, and 'execlist' executes a command on each one,
    # replacing <@> with the word. Unfortuantely this doesn't do dependancy checking.
    loadlist 'a' 'blocks' 'misc' 'tmap' 'tmap2' 'tmap3'
    execlist ${NASM} -M "src/<@>.nas > ${OBJ_DIR}/<@>${DEP_EXT}"
    CPPFLAGS = "-DUSEASM ${CPPFLAGS}"
    # 'associate' sets a command to compile files with the specified ext
    associate nas ${NASM} -o "<@> ${NASMFLAGS} src/<!>.nas"
  else
    CPPFLAGS = "-DNOASM ${CPPFLAGS}"
  done

# Set the compile and link commands. 'Compile' will compile the list of sourcefiles and
# store their names until another Compile is encountered (if you wish to add to a previous
# list, use 'Compileadd').
#
# C sources are compiled with:
# ${CC} ${CPPFLAGS} ${CFLAGS} ${DEP_OPT}${DEP_DIR}/file-sans-ext${DEP_EXT} ${OUT_OPT}${OBJ_DIR}/file-sans-ext${OBJ_EXT} ${SRC_OPT}detected-source-path/file-with-ext
#
# and for C++ sources:
# ${CXX} ${CPPFLAGS} ${CXXFLAGS} ${DEP_OPT}${DEP_DIR}/file-sans-ext${DEP_EXT} ${OUT_OPT}${OBJ_DIR}/file-sans-ext${OBJ_EXT} ${SRC_OPT}detected-source-path/file-with-ext
#
# A source file will not be compiled if the object file exists and is newer than the source.
# Or if the associated dependancy file exists, all of the object's dependancies are older
# than the object.
#
# If DEP_OPT is unset, the whole DEP_* section will be removed from the command line. Files
# with unknown extensions are silently ignored (but will still be passed to Linkexec with
# their name "object-ified").
#
# 'Linkexec' executes:
# ${LD} ${OUT_OPT}file${EXE_EXT} <list of objects previously compiled> ${LDFLAGS}
#
# It will not link if the target executable exists and is newer than all of the objects it's
# linking with.

  COMPILE = Compile
  LINK = Linkexec

# This is where it can find the sources.
  src_paths src src/g_doom src/g_heretic src/g_hexen src/g_raven src/g_strife src/g_shared src/oplsynth src/sound src/sdl

else

# Override the compile and link commands with rmobj and rmexec. A quick way to delete
# the objects and executables while dealing with only one list. No, rmobj will not
# delete the specified source file, but rather the object and dependancy files that would 
# result from compiling the specified source.
  EVILCLEAN = 1
  COMPILE = -rmobj
  LINK = -rmexec

done

${COMPILE} "autostart.cpp a.nas blocks.nas misc.nas tmap.nas tmap2.nas tmap3.nas \
 am_map.cpp b_bot.cpp b_func.cpp b_game.cpp b_move.cpp b_think.cpp bbannouncer.cpp \
 c_bind.cpp c_cmds.cpp c_console.cpp c_cvars.cpp c_dispatch.cpp c_expr.cpp \
 cmdlib.cpp colormatcher.cpp configfile.cpp ct_chat.cpp d_dehacked.cpp d_main.cpp \
 d_net.cpp d_netinfo.cpp d_protocol.cpp decallib.cpp decorations.cpp dobject.cpp \
 doomdef.cpp doomstat.cpp dsectoreffect.cpp dthinker.cpp empty.cpp f_finale.cpp \
 f_wipe.cpp farchive.cpp files.cpp g_game.cpp g_level.cpp gameconfigfile.cpp \
 gi.cpp hu_scores.cpp info.cpp infodefaults.cpp lumpconfigfile.cpp m_alloc.cpp \
 m_argv.cpp m_bbox.cpp m_cheat.cpp m_fixed.cpp m_menu.cpp m_misc.cpp m_options.cpp \
 m_png.cpp m_random.cpp mus2midi.cpp nodebuild.cpp nodebuild_events.cpp \
 nodebuild_extract.cpp nodebuild_gl.cpp nodebuild_utility.cpp p_acs.cpp \
 p_buildmap.cpp p_ceiling.cpp p_conversation.cpp p_doors.cpp p_effect.cpp \
 p_enemy.cpp p_floor.cpp p_interaction.cpp p_lights.cpp p_lnspec.cpp p_map.cpp \
 p_maputl.cpp p_mobj.cpp p_pillar.cpp p_plats.cpp p_pspr.cpp p_saveg.cpp \
 p_sectors.cpp p_setup.cpp p_sight.cpp p_spec.cpp p_switch.cpp p_teleport.cpp \
 p_terrain.cpp p_things.cpp p_tick.cpp p_trace.cpp p_user.cpp p_writemap.cpp \
 p_xlat.cpp po_man.cpp r_bsp.cpp r_data.cpp r_draw.cpp r_drawt.cpp r_main.cpp \
 r_plane.cpp r_segs.cpp r_sky.cpp r_things.cpp r_polymost.cpp s_advsound.cpp \
 s_environment.cpp s_playlist.cpp s_sndseq.cpp s_sound.cpp sc_man.cpp skins.cpp \
 st_stuff.cpp stats.cpp stringtable.cpp tables.cpp tempfiles.cpp thingdef.cpp thingdef_codeptr.cpp \
 v_collection.cpp v_draw.cpp v_font.cpp v_palette.cpp v_pfx.cpp v_text.cpp \
 v_video.cpp vectors.cpp name.cpp zstring.cpp zstringpool.cpp zstrformat.cpp \
 w_wad.cpp wi_stuff.cpp a_arachnotron.cpp a_archvile.cpp a_bossbrain.cpp \
 a_bruiser.cpp a_cacodemon.cpp a_cyberdemon.cpp a_demon.cpp \
 a_doomarmor.cpp a_doomartifacts.cpp a_doomdecorations.cpp a_doomhealth.cpp \
 a_doomimp.cpp a_doomkeys.cpp a_doommisc.cpp a_doomplayer.cpp a_doomweaps.cpp \
 a_fatso.cpp a_keen.cpp a_lostsoul.cpp a_painelemental.cpp a_possessed.cpp \
 a_revenant.cpp a_scriptedmarine.cpp a_spidermaster.cpp doom_sbar.cpp a_beast.cpp \
 a_chicken.cpp a_clink.cpp a_dsparil.cpp a_hereticambience.cpp a_hereticarmor.cpp \
 a_hereticartifacts.cpp a_hereticdecorations.cpp a_hereticimp.cpp a_heretickeys.cpp \
 a_hereticmisc.cpp a_hereticplayer.cpp a_hereticweaps.cpp a_ironlich.cpp \
 a_knight.cpp a_mummy.cpp a_snake.cpp a_wizard.cpp heretic_sbar.cpp a_bats.cpp \
 a_bishop.cpp a_blastradius.cpp a_boostarmor.cpp a_centaur.cpp a_clericboss.cpp \
 a_clericflame.cpp a_clericholy.cpp a_clericmace.cpp a_clericplayer.cpp \
 a_clericstaff.cpp a_demons.cpp a_dragon.cpp a_ettin.cpp a_fighteraxe.cpp \
 a_fighterboss.cpp a_fighterhammer.cpp a_fighterplayer.cpp a_fighterquietus.cpp \
 a_firedemon.cpp a_flame.cpp a_flechette.cpp a_fog.cpp a_healingradius.cpp \
 a_heresiarch.cpp a_hexenarmor.cpp a_hexendecorations.cpp a_hexenkeys.cpp \
 a_hexenspecialdecs.cpp a_iceguy.cpp a_korax.cpp a_mageboss.cpp a_magecone.cpp \
 a_magelightning.cpp a_mageplayer.cpp a_magestaff.cpp a_magewand.cpp a_mana.cpp \
 a_pig.cpp a_puzzleitems.cpp a_scriptprojectiles.cpp a_serpent.cpp a_speedboots.cpp \
 a_spike.cpp a_summon.cpp a_teleportother.cpp a_weaponpieces.cpp a_wraith.cpp \
 hexen_sbar.cpp a_artiegg.cpp a_artitele.cpp a_minotaur.cpp a_ravenambient.cpp \
 a_ravenartifacts.cpp a_ravenhealth.cpp a_acolyte.cpp a_alienspectres.cpp \
 a_beggars.cpp a_coin.cpp a_crusader.cpp a_entityboss.cpp a_inquisitor.cpp \
 a_loremaster.cpp a_macil.cpp a_merchants.cpp a_oracle.cpp a_peasant.cpp \
 a_programmer.cpp a_questitems.cpp a_ratbuddy.cpp a_reaver.cpp a_rebels.cpp \
 a_sentinel.cpp a_spectral.cpp a_stalker.cpp a_strifeammo.cpp a_strifearmor.cpp \
 a_strifebishop.cpp a_strifeitems.cpp a_strifekeys.cpp a_strifeplayer.cpp \
 a_strifestuff.cpp a_strifeweapons.cpp a_templar.cpp a_thingstoblowup.cpp \
 a_zombie.cpp strife_sbar.cpp a_action.cpp a_artifacts.cpp a_bridge.cpp \
 a_camera.cpp a_debris.cpp a_decals.cpp a_flashfader.cpp a_fountain.cpp \
 a_hatetarget.cpp a_keys.cpp a_lightning.cpp a_movingcamera.cpp a_pickups.cpp \
 a_quake.cpp a_secrettrigger.cpp a_sectoraction.cpp a_sharedmisc.cpp a_skies.cpp \
 a_soundenvironment.cpp a_spark.cpp a_splashes.cpp a_waterzone.cpp a_weaponpiece.cpp a_weapons.cpp \
 hudmessages.cpp shared_sbar.cpp fmopl.cpp mlkernel.cpp mlopl.cpp mlopl_io.cpp \
 opl_mus_player.cpp fmodsound.cpp i_music.cpp i_sound.cpp music_cd.cpp \
 music_flac.cpp music_midi_midiout.cpp music_midi_stream.cpp music_midi_timidity.cpp \
 music_mod.cpp music_mus_midiout.cpp music_mus_opl.cpp music_stream.cpp \
 sample_flac.cpp crashcatcher.c i_input.cpp i_net.cpp i_cd.cpp i_main.cpp \
 i_system.cpp hardware.cpp i_movie.cpp sdlvideo.cpp autozend.cpp"

${LINK} "${TARGET}"

# If we're not cleaning and zdoom.wad exists, exit now.
if "${EVILCLEAN}"="0" ifexist zdoom.wad  exit 0
#:makewad

LDFLAGS = ''
CFLAGS = '-Os -Wall -fomit-frame-pointer'

src_paths  tools/makewad
${COMPILE} makewad.c
${LINK} tools/makewad/makewad

src_paths  tools/xlatcc
${COMPILE} xlat-parse.tab.c gen.c
${LINK} tools/xlatcc/xlatcc

src_paths  tools/dehsupp
${COMPILE} parse.tab.c
${LINK} tools/dehsupp/dehsupp

do if "${EVILCLEAN}"="1"
  -rm "${OBJ_DIR}"
  -rm "${DEP_DIR}"
  -rm zdoomgcc.map
  -rm zdoom.wad
else
  call cd wadsrc && ../tools/makewad/makewad zdoom.lst
  copy wadsrc/zdoom.wad ./
done