## common definitions for Makefile, build/Makefile, source/enet/Makefile and
## source/jaudiolib/Makefile

# Use colored output
PRETTY_OUTPUT ?= 1

# Tools
CC=gcc
CXX=g++
AS=nasm
AR=ar
RC=windres
RANLIB=ranlib
STRIP=strip

L_CC=$(CC)
L_CXX=$(CXX)

CLANG?=0

ifneq (0,$(CLANG))
    CC=clang -x c -std=gnu89
    CXX=clang -x c++
    L_CC=clang -std=gnu89
    L_CXX=clang
#    AR=llvm-ar
#    RANLIB=llvm-ranlib
endif

# GCC version, for conditional selection of flags.
# This is easier than trying to squeeze it out of gcc --version:
GCC_MAJOR?=4

# Detect machine architecture
SYSARCH?=$(strip $(shell uname -m))

# Detect the platform if it wasn't explicitly given to us from
# the outside world. This allows cross-compilation by overriding
# CC and giving us PLATFORM specifically.
#
ifndef PLATFORM
    uname=$(strip $(shell uname -s))
    PLATFORM=UNKNOWN
    ifeq ($(findstring Linux,$(uname)),Linux)
        PLATFORM=LINUX
    endif
    ifeq ($(findstring BSD,$(uname)),BSD)
        PLATFORM=BSD
    endif
    ifeq ($(findstring MINGW,$(uname)),MINGW)
        PLATFORM=WINDOWS
    endif
    ifeq ($(findstring Darwin,$(uname)),Darwin)
        PLATFORM=DARWIN
    endif
    ifeq ($(findstring BeOS,$(uname)),BeOS)
        PLATFORM=BEOS
    endif
    ifeq ($(findstring skyos,$(uname)),skyos)
        PLATFORM=SKYOS
    endif
    ifeq ($(findstring QNX,$(uname)),QNX)
        PLATFORM=QNX
    endif
    ifeq ($(findstring SunOS,$(uname)),SunOS)
        PLATFORM=SUNOS
    endif
    ifeq ($(findstring syllable,$(uname)),syllable)
        PLATFORM=SYLLABLE
    endif
endif

# Binary suffix override:
EXESUFFIX_OVERRIDE ?=

# DirectX SDK location - if nonempty, overrides the DXROOTs of the individual
# Makefiles. Should be set to an absolute path since this Makefile is included
# at different directory levels
DXROOT_OVERRIDE:=

# Mac OS X Frameworks location
# Like above, use absolute paths.
APPLE_FRAMEWORKS ?=/Library/Frameworks
# Since the OS X startup window is generating errors, disable it by default.
OSX_STARTUPWINDOW ?= 0

# Engine options
#  USE_OPENGL     - enables basic OpenGL Polymost renderer
#  POLYMER        - enables fancy Polymer renderer
#  NOASM          - disables the use of inline assembly pragmas
#  LINKED_GTK     - enables compile-time linkage to GTK
#
POLYMER = 1
USE_OPENGL = 1
NOASM = 0
LINKED_GTK = 0
BUILD32_ON_64 ?= 0
# DO NOT SET THIS TO 1 AND COMMIT IT.
USE_LIBPNG ?= 1
USE_LIBVPX ?= 1


ifeq (0,$(USE_OPENGL))
    POLYMER = 0
    USE_LIBVPX = 0
endif


# Debugging/Build options
#  CPLUSPLUS - 1 = enable C++ building
#  RELEASE - 1 = no debugging
#  DEBUGANYWAY - 1 = include debug symbols even when generating release code
#  DISABLEINLINING - 1 = compile inline functions as extern instead of static inline
#  FORCEWARNINGS - 1 = do not disable any compiler warnings within the source
#  KRANDDEBUG - 1 = include logging of krand() calls for debugging the demo system
#  EFENCE  - 1 = compile with Electric Fence for malloc() debugging
#  OPTLEVEL	- 0..3 = GCC optimization strategy
#  LTO - 1 = enable link-time optimization, for GCC 4.5 and up
#
CPLUSPLUS?=0
RELEASE?=1
DEBUGANYWAY?=0
KRANDDEBUG?=0
DISABLEINLINING?=0
FORCEWARNINGS?=0
EFENCE?=0
DMALLOC?=0
OPTLEVEL?=2
PROFILER?=0
MUDFLAP?=0

ifndef LTO
    LTO=1
    ifneq (0,$(CLANG))
        ifeq ($(PLATFORM), WINDOWS)
            LTO=0
        endif
    endif
endif

ifeq (4,$(GCC_MAJOR))
endif

ifeq (4,$(GCC_MAJOR))
    F_NO_STACK_PROTECTOR := -fno-stack-protector
    # there are some link-time issues with stack protectors, so make it possible to override
    F_STACK_PROTECTOR_ALL ?= -fstack-protector-all
    ifeq (0,$(CLANG))
        F_JUMP_TABLES := -fjump-tables
    endif
    M_TUNE_GENERIC := -mtune=generic
    M_STACKREALIGN := -mstackrealign
    W_STRICT_OVERFLOW := -Wstrict-overflow=1
endif

ifeq ($(PLATFORM),DARWIN)
    DARWINVERSION?=$(strip $(shell uname -r | cut -d . -f 1))
    ifeq (1,$(strip $(shell expr $(DARWINVERSION) \< 10)))
        DARWIN9 ?= 1
    endif

#    BASECOMMONFLAGS    += -fno-leading-underscore

    ifeq (1,$(DARWIN9))
        F_JUMP_TABLES :=
        W_STRICT_OVERFLOW :=
    endif

    ifeq (1,$(BUILD32_ON_64))
        BASECOMMONFLAGS += $(F_NO_STACK_PROTECTOR)
    else
        ifeq ($(findstring ppc,$(ARCH)),ppc)
            BASECOMMONFLAGS += $(F_NO_STACK_PROTECTOR)
        endif
    endif
endif

ifndef OPTOPT
    ifeq ($(PLATFORM), WII)
        OPTOPT=
    else
        OPTOPTARCH=$(ARCH)
        ifeq (,$(OPTOPTARCH))
            OPTOPTARCH=$(SYSARCH)
        endif

        ifeq (i686,$(findstring i686, $(OPTOPTARCH)))
            OPTOPT=-march=pentium3 $(M_TUNE_GENERIC) -mmmx
            # -msse2 -mfpmath=sse,387 -malign-double $(M_STACKREALIGN)
        else
            OPTOPT=
        endif
    endif

    ifneq (,$(CUSTOMOPT))
        OPTOPT+= $(CUSTOMOPT)
    endif
endif

ifneq (0,$(KRANDDEBUG))
    RELEASE=0
endif
ifneq (0,$(PROFILER))
    DEBUGANYWAY=1
endif



# compiler flags etc.
BASECFLAGS= -Wno-attributes
BASECONLYFLAGS=-Wimplicit -Wdeclaration-after-statement
BASECXXFLAGS= -fno-exceptions -fno-rtti -fpermissive -Wno-write-strings -Wno-narrowing
BASEASFLAGS=-s #-g
BASELDFLAGS=

ifeq ($(PLATFORM),WII)
    override USE_LIBPNG = 0
    override USE_LIBVPX = 0
endif

BASELIBS=-lm
ifneq (0,$(USE_LIBVPX))
    # On Windows, we link statically to libvpx
    BASELIBS+= -lvpx
endif


ifneq ($(RELEASE)$(DEBUGANYWAY),10)
    # debug build or DEBUGANYWAY=1 --> -g flag
    ifneq (0,$(CLANG))
        debug=-g
    else ifeq ($(PLATFORM), WII)
        debug=-g
    else
        debug=-ggdb
    endif
endif

ifneq (0,$(RELEASE))
    # Debugging disabled
    debug+= -O$(OPTLEVEL)
    ifeq (0,$(CLANG))
        debug+= -funswitch-loops
    endif
    ifeq (0,$(DEBUGANYWAY))
        debug+= -fomit-frame-pointer -DNDEBUG
    else
        debug+= -DDEBUGGINGAIDS
    endif
    ifneq (0,$(LTO))
        BASELDFLAGS+= -flto
        debug+= -DUSING_LTO -flto
    endif
else
    # Debugging enabled
    debug+= -O0

    ifeq (0,$(DEBUGANYWAY))
        debug+= -DDEBUGGINGAIDS
    else
        debug+= -DDEBUGGINGAIDS=2
    endif

    ifneq (0,$(CLANG))
#        CLANG_MAJOR := $(shell clang -dM -E -x c /dev/null | grep __clang_major__ | awk '{ print $$3 }')
        BASECFLAGS+= -Xclang -fcatch-undefined-behavior
#        ifeq ($(CLANG_MAJOR),3)
#            debug+= -faddress-sanitizer
#        endif
    endif
    ifeq ($(PLATFORM),LINUX)
        BASELIBS+=-rdynamic
    endif
    ifneq (0,$(MUDFLAP))
        BASELIBS+= -lmudflapth
        debug+= -fmudflapth
    endif
    ifneq (0,$(PROFILER))
        # might need to be disabled for Darwin:
        BASELIBS+= -lprofiler
        debug+= -pg
    endif
    ifneq (0,$(KRANDDEBUG))
        debug+=-DKRANDDEBUG=1
    endif
endif

ifeq (0,$(CLANG))
#    W_NO_UNUSED_RESULT := $(shell echo '' | $(CC) -E -Wno-unused-result - 2>/dev/null && echo -Wno-unused-result)
#    W_NO_UNUSED_RESULT := $(findstring -Wno-unused-result,$(W_NO_UNUSED_RESULT))
    W_NO_UNUSED_RESULT := -Wno-unused-result
else
    W_NO_UNUSED_RESULT :=
endif

CWARNS := -W -Wall -Werror-implicit-function-declaration \
    -Wpointer-arith \
    -Wextra \
    #-Wstrict-prototypes \
    #-Waggregate-return \
    #-Wwrite-strings \
    #-Wcast-qual -Wcast-align \
    #-Waddress -Wlogical-op

BASECOMMONFLAGS=$(debug) $(OPTOPT) $(CWARNS) \
	-funsigned-char -fno-strict-aliasing -DNO_GCC_BUILTINS -D_FORTIFY_SOURCE=2 \
	$(F_JUMP_TABLES) $(W_NO_UNUSED_RESULT) $(ARCH)
ifneq (0,$(CLANG))
    BASECOMMONFLAGS+= -Wno-unused-value -Wno-parentheses
endif


#### Lunatic development, do not touch!
LUNATIC=0
LUAJIT=luajit

# for LJ headers:
LUAJIT_WIN_SRC:= g:/mod/LuaJIT-2.0.0-beta8/src

ifneq ($(LUNATIC),0)
    # FIXME: Lunatic doesn't build with inlining because of wacky include
    # chains!
    override DISABLEINLINING=1

    ifeq ($(PLATFORM),WINDOWS)
        BASECOMMONFLAGS+= -I$(LUAJIT_WIN_SRC)
    else
        BASECOMMONFLAGS+= -I/usr/local/include/luajit-2.0
    endif
    BASECOMMONFLAGS+= -I$(SRC)/lunatic -DLUNATIC

    ifeq ($(PLATFORM),WINDOWS)
        BASELIBS+= -LWindows/lib -lluajit
    else
        BASELIBS+= -lluajit-5.1
    endif
endif

####

ifneq (0,$(DISABLEINLINING))
    BASECOMMONFLAGS+= -DDISABLE_INLINING
endif
ifneq (0,$(FORCEWARNINGS))
    BASECOMMONFLAGS+= -DFORCE_WARNINGS
endif

BASELDFLAGS+= $(OPTOPT)

# This should come from the environment:
ifdef EDUKE32_MY_DEVELOPER_ID
    BASECOMMONFLAGS+= -DMY_DEVELOPER_ID=$(EDUKE32_MY_DEVELOPER_ID)
endif

ifneq (0,$(USE_LIBPNG))
    BASECOMMONFLAGS+= -DUSE_LIBPNG
endif
ifneq (0,$(USE_LIBVPX))
    BASECOMMONFLAGS+= -DUSE_LIBVPX
endif
ifneq (0,$(OSX_STARTUPWINDOW))
    BASECOMMONFLAGS+= -DOSX_STARTUPWINDOW
endif

ifneq (0,$(EFENCE))
    BASELIBS+= -lefence
    BASECOMMONFLAGS+= -DEFENCE
endif
ifneq (0,$(DMALLOC))
    BASELIBS+= -ldmalloc
    BASECOMMONFLAGS+= -DDMALLOC
endif

# Misc. stuff that is constant between Makefiles
EROOT:=build

# will be potentially overridden in build/Makefile.shared
EXESUFFIX=