Makefile.libretro

DEBUG = 0
USE_LIBRETRO_VFS = 1

GIT_VERSION := " $(shell git rev-parse --short HEAD)"

SPACE :=
SPACE := $(SPACE) $(SPACE)
BACKSLASH :=
BACKSLASH := \$(BACKSLASH)
filter_out1 = $(filter-out $(firstword $1),$1)
filter_out2 = $(call filter_out1,$(call filter_out1,$1))
unixpath = $(subst \,/,$1)
unixcygpath = /$(subst :,,$(call unixpath,$1))
C68K := 1

ifeq ($(platform),)
	platform = unix
	ifeq ($(shell uname -s),)
		platform = win
	else ifneq ($(findstring MINGW,$(shell uname -s)),)
		platform = win
	else ifneq ($(findstring Darwin,$(shell uname -s)),)
		platform = osx
		arch = intel
	ifeq ($(shell uname -p),arm64)
		arch = arm
	endif
	ifeq ($(shell uname -p),powerpc)
		arch = ppc
	endif
	else ifneq ($(findstring win,$(shell uname -s)),)
		platform = win
	endif
endif

# system platform
system_platform = unix
ifeq ($(shell uname -a),)
	EXE_EXT = .exe
	system_platform = win
else ifneq ($(findstring Darwin,$(shell uname -a)),)
	system_platform = osx
	arch = intel
	ifeq ($(shell uname -p),arm64)
		arch = arm
	endif
	ifeq ($(shell uname -p),powerpc)
		arch = ppc
	endif
else ifneq ($(findstring MINGW,$(shell uname -a)),)
	system_platform = win
endif

ifeq ($(platform), win)
	INCLUDES += -I Windows
endif

TARGET_NAME := px68k
ENDIANNESS_DEFINES :=
CORE_DIR := .

# Unix
ifneq (,$(findstring unix,$(platform)))
	CFLAGS += -g -O2
	CXXFLAGS += -g -O2 -fno-merge-constants
	TARGET := $(TARGET_NAME)_libretro.so
	fpic := -fPIC
	SHARED := -shared -Wl,--no-undefined -Wl,--version-script=link.T
	FLAGS += -D__LINUX__

# OS X
else ifeq ($(platform), osx)
   	TARGET := $(TARGET_NAME)_libretro.dylib
   	fpic := -fPIC
   	SHARED := -dynamiclib
   	ifeq ($(arch),ppc)
      	ENDIANNESS_DEFINES := -DMSB_FIRST -DBYTE_ORDER=BIG_ENDIAN
      	OLD_GCC := 1
   	endif
   	OSXVER = `sw_vers -productVersion | cut -d. -f 2`
   	OSX_LT_MAVERICKS = `(( $(OSXVER) <= 9)) && echo "YES"`
   	fpic += -mmacosx-version-min=10.7
   	CXXFLAGS += -stdlib=libc++
   	LDFLAGS += -stdlib=libc++

   ifeq ($(CROSS_COMPILE),1)
		TARGET_RULE   = -target $(LIBRETRO_APPLE_PLATFORM) -isysroot $(LIBRETRO_APPLE_ISYSROOT)
		CFLAGS   += $(TARGET_RULE)
		CXXFLAGS += $(TARGET_RULE)
		LDFLAGS  += $(TARGET_RULE)
   endif

# iOS
else ifneq (,$(findstring ios,$(platform)))
	TARGET := $(TARGET_NAME)_libretro_ios.dylib
	fpic = -fPIC
	SHARED := -dynamiclib
        MINVERSION :=

	ifeq ($(IOSSDK),)
   		IOSSDK := $(shell xcodebuild -version -sdk iphoneos Path)
	endif

	DEFINES := -DIOS

	ifeq ($(platform),ios-arm64)
   		CC = clang -arch arm64 -isysroot $(IOSSDK)
   		CXX = clang++ -arch arm64 -isysroot $(IOSSDK)
	else
   		CC = clang -arch armv7 -isysroot $(IOSSDK)
   		CXX = clang++ -arch armv7 -isysroot $(IOSSDK)
	endif

	ifeq ($(platform),$(filter $(platform),ios9 ios-arm64))
           MINVERSION = -miphoneos-version-min=8.0
	else
           MINVERSION = -miphoneos-version-min=5.0
	endif
	CFLAGS += $(MINVERSION)
	CXXFLAGS += $(MINVERSION)
	LDFLAGS += $(MINVERSION)

# tvOS
else ifeq ($(platform), tvos-arm64)
   TARGET := $(TARGET_NAME)_libretro_tvos.dylib
   fpic    = -fPIC
   SHARED := -dynamiclib

ifeq ($(IOSSDK),)
   IOSSDK := $(shell xcodebuild -version -sdk appletvos Path)
endif

   DEFINES := -DIOS

   CC = cc -arch arm64 -isysroot $(IOSSDK)
   CXX = c++ -arch arm64 -isysroot $(IOSSDK)
   MINVERSION = -mappletvos-version-min=11.0
   CFLAGS += $(MINVERSION)
   CXXFLAGS += $(MINVERSION)
   LDFLAGS += $(MINVERSION)

# android arm
else ifneq (,$(findstring android,$(platform)))
	TARGET := $(TARGET_NAME)_libretro_android.so
	fpic = -fPIC
	SHARED := -lstdc++ -llog -shared -Wl,--version-script=link.T -Wl,--no-undefined
	CFLAGS +=  -g -O2
	CXXFLAGS = -g -O2  -fno-merge-constants
	CC = arm-linux-androideabi-gcc
	CXX = arm-linux-androideabi-g++
	FLAGS += -D__LINUX__ -DARM -marm

# crosspi arm
else ifneq (,$(findstring crosspi,$(platform)))
	CC = arm-linux-gnueabihf-gcc
	CXX = arm-linux-gnueabihf-g++
	CC_AS = arm-linux-gnueabihf-as
	CPU_FLAGS += -march=armv7-a -mfpu=neon-vfpv4 -mfloat-abi=hard
	CFLAGS += -g -O2
	CXXFLAGS += -g -O2  -fno-merge-constants
	TARGET := $(TARGET_NAME)_libretro.so
	fpic := -fPIC
	SHARED := -shared -Wl,--no-undefined -Wl,--version-script=link.T
	FLAGS += -D__LINUX__ -DARM -marm
else ifeq ($(platform), vita)
	TARGET := $(TARGET_NAME)_libretro_vita.a
	CC = arm-vita-eabi-gcc
	CXX = arm-vita-eabi-g++
	AR = arm-vita-eabi-ar
	FLAGS += -DVITA=1
	CXXFLAGS += -Wl,-q -Wall -O2
	STATIC_LINKING = 1
# Nintendo Switch (libnx)
else ifeq ($(platform), libnx)
	include $(DEVKITPRO)/libnx/switch_rules
	TARGET := $(TARGET_NAME)_libretro_libnx.a
	CPU_FLAGS += -march=armv8-a -mtune=cortex-a57 -mtp=soft
	fpic := -fPIC
	FLAGS += -DARM -ffunction-sections -fdata-sections -ftls-model=local-exec -specs=$(LIBNX)/switch.specs
	CXXFLAGS += -fno-rtti -fno-exceptions
	EXTRA_LDF += -Wl,--allow-multiple-definition
	STATIC_LINKING := 1

# Classic Platforms ####################
# Platform affix = classic_<ISA>_<µARCH>
# Help at https://modmyclassic.com/comp

# (armv7 a7, hard point, neon based) ###
# NESC, SNESC, C64 mini
else ifeq ($(platform), classic_armv7_a7)
	TARGET := $(TARGET_NAME)_libretro.so
	fpic := -fPIC
	SHARED := -shared -Wl,--no-undefined -Wl,--version-script=link.T
	CPU_FLAGS += -Ofast \
	-flto=4 -fwhole-program -fuse-linker-plugin \
	-fdata-sections -ffunction-sections -Wl,--gc-sections \
	-fno-stack-protector -fno-ident -fomit-frame-pointer \
	-falign-functions=1 -falign-jumps=1 -falign-loops=1 \
	-fno-unwind-tables -fno-asynchronous-unwind-tables -fno-unroll-loops \
	-fmerge-all-constants -fno-math-errno \
	-marm -mtune=cortex-a7 -mfpu=neon-vfpv4 -mfloat-abi=hard
	HAVE_NEON = 1
	ARCH = arm
	FLAGS += -D__LINUX__ -DARM -marm
	ifeq ($(shell echo `$(CC) -dumpversion` "< 4.9" | bc -l), 1)
	  CFLAGS += -march=armv7-a
	else
	  CFLAGS += -march=armv7ve
	  # If gcc is 5.0 or later
	  ifeq ($(shell echo `$(CC) -dumpversion` ">= 5" | bc -l), 1)
	    LDFLAGS += -static-libgcc -static-libstdc++
	  endif
	endif
#######################################

# (armv8 a35, hard point, neon based) ###
# PlayStation Classic 
else ifeq ($(platform), classic_armv8_a35)
	TARGET := $(TARGET_NAME)_libretro.so
	fpic := -fPIC
	SHARED := -shared -Wl,--no-undefined -Wl,--version-script=link.T
	CFLAGS += -Ofast \
	-fuse-linker-plugin \
	-fno-stack-protector -fno-ident -fomit-frame-pointer \
	-fmerge-all-constants -ffast-math -funroll-all-loops \
	-marm -mcpu=cortex-a35 -mfpu=neon-fp-armv8 -mfloat-abi=hard
	HAVE_NEON = 1
	ARCH = arm
	FLAGS += -D__LINUX__ -DARM -marm
	LDFLAGS += -marm -mcpu=cortex-a35 -mfpu=neon-fp-armv8 -mfloat-abi=hard -Ofast -flto -fuse-linker-plugin
#######################################

# cross Windows
else ifeq ($(platform), wincross64)
	TARGET := $(TARGET_NAME)_libretro.dll
	AR = x86_64-w64-mingw32-ar
	CC = x86_64-w64-mingw32-gcc
	CXX = x86_64-w64-mingw32-g++
	SHARED := -shared -Wl,--no-undefined -Wl,--version-script=link.T
	LDFLAGS += -static-libgcc -static-libstdc++
	EXTRA_LDF := -lwinmm -Wl,--export-all-symbols

# Windows MSVC 2017 all architectures
else ifneq (,$(findstring windows_msvc2017,$(platform)))

    NO_GCC := 1
    CFLAGS += -DNOMINMAX
    CXXFLAGS += -DNOMINMAX
    WINDOWS_VERSION = 1

	PlatformSuffix = $(subst windows_msvc2017_,,$(platform))
	ifneq (,$(findstring desktop,$(PlatformSuffix)))
		WinPartition = desktop
		MSVC2017CompileFlags = -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -FS
		LDFLAGS += -MANIFEST -LTCG:incremental -NXCOMPAT -DYNAMICBASE -DEBUG -OPT:REF -INCREMENTAL:NO -SUBSYSTEM:WINDOWS -MANIFESTUAC:"level='asInvoker' uiAccess='false'" -OPT:ICF -ERRORREPORT:PROMPT -NOLOGO -TLBID:1
		LIBS += kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib
	else ifneq (,$(findstring uwp,$(PlatformSuffix)))
		WinPartition = uwp
		MSVC2017CompileFlags = -DWINAPI_FAMILY=WINAPI_FAMILY_APP -D_WINDLL -D_UNICODE -DUNICODE -D__WRL_NO_DEFAULT_LIB__ -EHsc -FS
		LDFLAGS += -APPCONTAINER -NXCOMPAT -DYNAMICBASE -MANIFEST:NO -LTCG -OPT:REF -SUBSYSTEM:CONSOLE -MANIFESTUAC:NO -OPT:ICF -ERRORREPORT:PROMPT -NOLOGO -TLBID:1 -DEBUG:FULL -WINMD:NO
		LIBS += WindowsApp.lib
	endif

	CFLAGS += $(MSVC2017CompileFlags)
	CXXFLAGS += $(MSVC2017CompileFlags)

	TargetArchMoniker = $(subst $(WinPartition)_,,$(PlatformSuffix))

	CC  = cl.exe
	CXX = cl.exe
	LD = link.exe

	reg_query = $(call filter_out2,$(subst $2,,$(shell reg query "$2" -v "$1" 2>nul)))
	fix_path = $(subst $(SPACE),\ ,$(subst \,/,$1))

	ProgramFiles86w := $(shell cmd //c "echo %PROGRAMFILES(x86)%")
	ProgramFiles86 := $(shell cygpath "$(ProgramFiles86w)")

	WindowsSdkDir ?= $(call reg_query,InstallationFolder,HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Microsoft SDKs\Windows\v10.0)
	WindowsSdkDir ?= $(call reg_query,InstallationFolder,HKEY_CURRENT_USER\SOFTWARE\Wow6432Node\Microsoft\Microsoft SDKs\Windows\v10.0)
	WindowsSdkDir ?= $(call reg_query,InstallationFolder,HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft SDKs\Windows\v10.0)
	WindowsSdkDir ?= $(call reg_query,InstallationFolder,HKEY_CURRENT_USER\SOFTWARE\Microsoft\Microsoft SDKs\Windows\v10.0)
	WindowsSdkDir := $(WindowsSdkDir)

	WindowsSDKVersion ?= $(firstword $(foreach folder,$(subst $(subst \,/,$(WindowsSdkDir)Include/),,$(wildcard $(call fix_path,$(WindowsSdkDir)Include\*))),$(if $(wildcard $(call fix_path,$(WindowsSdkDir)Include/$(folder)/um/Windows.h)),$(folder),)))$(BACKSLASH)
	WindowsSDKVersion := $(WindowsSDKVersion)

	VsInstallBuildTools = $(ProgramFiles86)/Microsoft Visual Studio/2017/BuildTools
	VsInstallEnterprise = $(ProgramFiles86)/Microsoft Visual Studio/2017/Enterprise
	VsInstallProfessional = $(ProgramFiles86)/Microsoft Visual Studio/2017/Professional
	VsInstallCommunity = $(ProgramFiles86)/Microsoft Visual Studio/2017/Community

	VsInstallRoot ?= $(shell if [ -d "$(VsInstallBuildTools)" ]; then echo "$(VsInstallBuildTools)"; fi)
	ifeq ($(VsInstallRoot), )
		VsInstallRoot = $(shell if [ -d "$(VsInstallEnterprise)" ]; then echo "$(VsInstallEnterprise)"; fi)
	endif
	ifeq ($(VsInstallRoot), )
		VsInstallRoot = $(shell if [ -d "$(VsInstallProfessional)" ]; then echo "$(VsInstallProfessional)"; fi)
	endif
	ifeq ($(VsInstallRoot), )
		VsInstallRoot = $(shell if [ -d "$(VsInstallCommunity)" ]; then echo "$(VsInstallCommunity)"; fi)
	endif
	VsInstallRoot := $(VsInstallRoot)

	VcCompilerToolsVer := $(shell cat "$(VsInstallRoot)/VC/Auxiliary/Build/Microsoft.VCToolsVersion.default.txt" | grep -o '[0-9\.]*')
	VcCompilerToolsDir := $(VsInstallRoot)/VC/Tools/MSVC/$(VcCompilerToolsVer)

	WindowsSDKSharedIncludeDir := $(shell cygpath -w "$(WindowsSdkDir)\Include\$(WindowsSDKVersion)\shared")
	WindowsSDKUCRTIncludeDir := $(shell cygpath -w "$(WindowsSdkDir)\Include\$(WindowsSDKVersion)\ucrt")
	WindowsSDKUMIncludeDir := $(shell cygpath -w "$(WindowsSdkDir)\Include\$(WindowsSDKVersion)\um")
	WindowsSDKUCRTLibDir := $(shell cygpath -w "$(WindowsSdkDir)\Lib\$(WindowsSDKVersion)\ucrt\$(TargetArchMoniker)")
	WindowsSDKUMLibDir := $(shell cygpath -w "$(WindowsSdkDir)\Lib\$(WindowsSDKVersion)\um\$(TargetArchMoniker)")

	# For some reason the HostX86 compiler doesn't like compiling for x64
	# ("no such file" opening a shared library), and vice-versa.
	# Work around it for now by using the strictly x86 compiler for x86, and x64 for x64.
	# NOTE: What about ARM?
	ifneq (,$(findstring x64,$(TargetArchMoniker)))
		VCCompilerToolsBinDir := $(VcCompilerToolsDir)\bin\HostX64
	else
		VCCompilerToolsBinDir := $(VcCompilerToolsDir)\bin\HostX86
	endif

	PATH := $(shell IFS=$$'\n'; cygpath "$(VCCompilerToolsBinDir)/$(TargetArchMoniker)"):$(PATH)
	PATH := $(PATH):$(shell IFS=$$'\n'; cygpath "$(VsInstallRoot)/Common7/IDE")
	INCLUDE := $(shell IFS=$$'\n'; cygpath -w "$(VcCompilerToolsDir)/include")
	LIB := $(shell IFS=$$'\n'; cygpath -w "$(VcCompilerToolsDir)/lib/$(TargetArchMoniker)")
	ifneq (,$(findstring uwp,$(PlatformSuffix)))
		LIB := $(LIB);$(shell IFS=$$'\n'; cygpath -w "$(LIB)/store")
	endif

	export INCLUDE := $(INCLUDE);$(WindowsSDKSharedIncludeDir);$(WindowsSDKUCRTIncludeDir);$(WindowsSDKUMIncludeDir)
	export LIB := $(LIB);$(WindowsSDKUCRTLibDir);$(WindowsSDKUMLibDir)
	TARGET := $(TARGET_NAME)_libretro.dll
	PSS_STYLE :=2
	LDFLAGS += -DLL
	CFLAGS += -DHAVE_C99_VARIADIC_MACROS

# ARM
else ifneq (,$(findstring armv,$(platform)))
	TARGET := $(TARGET_NAME)_libretro.so
	SHARED := -shared -Wl,--no-undefined -Wl,--version-script=link.T
	fpic := -fPIC -fsigned-char
	CFLAGS += -D_GNU_SOURCE=1
	CC = gcc
	ifneq (,$(findstring cortexa8,$(platform)))
		CFLAGS += -marm -mcpu=cortex-a8
		ASFLAGS += -mcpu=cortex-a8
	else ifneq (,$(findstring cortexa9,$(platform)))
		CFLAGS += -marm -mcpu=cortex-a9
		ASFLAGS += -mcpu=cortex-a9
	endif
	CFLAGS += -marm
	ifneq (,$(findstring neon,$(platform)))
		CFLAGS += -mfpu=neon
		ASFLAGS += -mfpu=neon
		HAVE_NEON = 1
	endif
	ifneq (,$(findstring softfloat,$(platform)))
		CFLAGS += -mfloat-abi=softfp
		ASFLAGS += -mfloat-abi=softfp
	else #ifneq (,$(findstring hardfloat,$(platform)))
		CFLAGS += -mfloat-abi=hard
		ASFLAGS += -mfloat-abi=hard
	endif
	CFLAGS += -DARM
# QNX
else ifeq ($(platform), qnx)
	EXT?=so
	TARGET := $(TARGET_NAME)_libretro_$(platform).$(EXT)
	fpic := -fPIC
	SHARED := -shared -Wl,--no-undefined
	CC = qcc -Vgcc_ntoarmv7le
	CXX = QCC -Vgcc_ntoarmv7le
	LDFLAGS += -lm
# Windows
else
	TARGET :=  $(TARGET_NAME)_libretro.dll
	CC ?= gcc
	CXX ?= g++
	SHARED := -shared -Wl,--no-undefined -Wl,--version-script=link.T
	LDFLAGS += -static-libgcc -static-libstdc++
	EXTRA_LDF = -lwinmm -Wl,--export-all-symbols
endif

CDEBUGFLAGS	+= -DNO_MERCURY
CDEBUGFLAGS	+= -DPX68K_VERSION=\"0.15+\" -DGIT_VERSION=\"$(GIT_VERSION)\"
FLAGS 		+= $(CDEBUGFLAGS)

include $(CORE_DIR)/Makefile.common

OBJECTS := $(SOURCES_CXX:.cpp=.o) $(SOURCES_C:.c=.o) $(SOURCES_S:.s=.o)

OBJOUT   = -o
LINKOUT  = -o

ifneq (,$(findstring msvc,$(platform)))
	OBJOUT  = -Fo
	LINKOUT = -out:
ifeq ($(STATIC_LINKING),1)
	LD ?= lib.exe
	STATIC_LINKING=0
else
	LD = link.exe
endif
else
	LD = $(CXX)
endif

all: $(TARGET)

ifeq ($(DEBUG), 1)
   FLAGS += -O0 -g
else ifneq (,$(findstring msvc,$(platform)))
   FLAGS += -O2
else
   FLAGS += -O2 -ffast-math -fomit-frame-pointer
endif

ifeq ($(USE_LIBRETRO_VFS),1)
	FLAGS += -DUSE_LIBRETRO_VFS
endif

LDFLAGS +=  $(fpic) $(SHARED) $(EXTRA_LDF)
FLAGS   += $(INCFLAGS)

WARNINGS :=

FLAGS    += -D__LIBRETRO__ $(ENDIANNESS_DEFINES) $(WARNINGS) $(fpic)

CXXFLAGS += $(FLAGS) $(CPU_FLAGS) -fpermissive
#CFLAGS   += $(FLAGS) -std=c99 $(CPU_FLAGS) -D_GNU_SOURCE
CFLAGS   += $(FLAGS) $(CPU_FLAGS)

$(TARGET): $(OBJECTS)
ifeq ($(STATIC_LINKING), 1)
	$(AR) rcs $@ $(OBJECTS)
else
	$(LD) $(LINKOUT)$@ $^ $(LDFLAGS)
endif

%.o: %.cpp
	$(CXX) -c $(OBJOUT)$@ $< $(CXXFLAGS)

%.o: %.c
	$(CC) -c $(OBJOUT)$@ $< $(CFLAGS)

%.o: %.s
	$(CXX) $(CFLAGS)  -c $^ $(OBJOUT)$@

clean:
	rm -f $(TARGET) $(OBJECTS)

.PHONY: clean