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

# Use colored output
PRETTY_OUTPUT ?= 1

# 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.
NEDMALLOC = 0
USE_LIBPNG ?= 0
USE_LIBVPX ?= 1

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


# Debugging/Build options
#  RELEASE - 1 = no debugging
#  DEBUGANYWAY - 1 = include debug symbols even when generating release code
#  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
#  CLANG - 1 = enable the Clang/LLVM compiler
#
RELEASE?=1
DEBUGANYWAY?=0
KRANDDEBUG?=0
EFENCE?=0
DMALLOC?=0
OPTLEVEL?=2
PROFILER?=0
MUDFLAP?=0
LTO?=0
CLANG?=0

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


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

ifneq (0,$(CLANG))
    CC=clang
    CXX=clang++
#    AR=llvm-ar
#    RANLIB=llvm-ranlib
endif

# compiler flags etc.
BASECONLYFLAGS=-Wimplicit
BASECXXFLAGS= -fno-exceptions -fno-rtti
BASEASFLAGS=-s #-g
BASELDFLAGS=

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


ifneq ($(RELEASE)$(DEBUGANYWAY),10)
    # debug build or DEBUGANYWAY=1 --> -g flag
    ifeq ($(CC),clang)
        debug=-g
    else
        debug=-ggdb
    endif
endif

ifneq (0,$(RELEASE))
    # Debugging disabled
    debug+= -O$(OPTLEVEL)
    ifneq ($(CC),clang)
        debug+= -funswitch-loops
    endif
    ifeq (0,$(DEBUGANYWAY))
        debug+= -fomit-frame-pointer -DNDEBUG
    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

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

ifneq ($(CC),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))
else
    W_NO_UNUSED_RESULT :=
endif

BASECFLAGS=$(debug) -W -Wall -Werror-implicit-function-declaration \
	-funsigned-char -fno-strict-aliasing -DNO_GCC_BUILTINS -D_FORTIFY_SOURCE=2 \
	$(F_JUMP_TABLES) $(W_NO_UNUSED_RESULT) $(ARCH) \
	-Wextra #-Wwrite-strings -Waddress -Wlogical-op
ifeq ($(CC),clang)
    BASECFLAGS+= -Wno-unused-value -Wno-parentheses
endif

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

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

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

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