# Make default definitions
ifndef $(ARCH)
	ifeq ($(findstring CYGWIN,$(shell uname)),CYGWIN)
		# Cygwin returns 'unknown'
		ARCH := i386
	else
		ARCH := $(shell uname -i)
	endif
endif

############################################
############# NACL ### TARGET
ifeq ($(TARGET),nacl)
	ifndef NACL_SDK_ROOT
		$(error Set NACL_SDK_ROOT environment variable)
	endif
	ifeq ($(findstring CYGWIN,$(shell uname)),CYGWIN)
		NACL_SDK_ROOT := $(shell cygpath -u "$(NACL_SDK_ROOT)")
	endif
	
	OSNAME:=$(shell python $(NACL_SDK_ROOT)/tools/getos.py)
	NACL_TOOLCHAIN:=$(abspath $(NACL_SDK_ROOT)/toolchain/$(OSNAME)_x86_newlib)
	CXX := $(NACL_TOOLCHAIN)/bin/i686-nacl-g++
	CC := $(NACL_TOOLCHAIN)/bin/i686-nacl-gcc
	AR := $(NACL_TOOLCHAIN)/bin/i686-nacl-ar
	STATICLIB_EXT := a
	DYNAMICLIB_EXT := nexe
	LIBRARY_PREFIX := lib
	LDLIBS += -lppapi_cpp -lppapi 
	GLOBAL_INCLUDES := -I../zlib/zlib_library -I$(NACL_TOOLCHAIN)/i686-nacl/usr/include
	ZLIB_BUILD := defined
	CFLAGS := -D__int64="long long"
	CXXFLAGS := -D__int64="long long"

else
############################################
### EVERYTHING ELSE REQUIRES JAVA_HOME #####
ifndef JAVA_HOME
	$(error Set JAVA_HOME environment variable)
endif

ifeq ($(TARGET),)
	ifeq ($(shell uname),Darwin)
		TARGET := darwin
	endif
	ifeq ($(shell uname),Linux)
		TARGET := linux
	endif
	ifeq ($(findstring CYGWIN,$(shell uname)),CYGWIN)
		TARGET := windows
	endif
	ifeq ($(findstring MINGW,$(shell uname)),MINGW)
		TARGET := windows
	endif
endif

############################################
####### Windows via MinGW/Linux and MinGW/Cygwin target
ifeq ($(TARGET),windows)
	CXX := i686-w64-mingw32-g++
	CC := i686-w64-mingw32-gcc
	AR := i686-w64-mingw32-ar
	GLOBAL_INCLUDES := -I../zlib/zlib_library
	ZLIB_BUILD := defined
	STATICLIB_EXT := lib
	DYNAMICLIB_EXT := dll
	LIBRARY_PREFIX := # empty
	LDFLAGS := -Wl,--kill-at  -static-libstdc++ -static-libgcc
	ifeq ($(findstring CYGWIN,$(shell uname)),CYGWIN)
		# Latest MinGW compiler under Cygwin needs this
		CFLAGS := -D__int64="long long"
		CXXFLAGS := -D__int64="long long"
	endif
############################################
####### DEFAULT LINUX ########## TARGET
else
	CXX := g++
	CC := gcc
	STRIP := strip
	STATICLIB_EXT := a
	DYNAMICLIB_EXT := so
	LIBRARY_PREFIX := lib
endif

ifeq ($(ARCH),i386)
	CFLAGS += -m32
	CXXFLAGS += -m32
	LDFLAGS += -m32
else ifeq ($(ARCH),x86_64)
	CFLAGS += -m64
	CXXFLAGS += -m64
	LDFLAGS += -m64
else 
	$(error Undefined ARCH $(ARCH))  
endif

endif