#**************************************************************************************************
#
#   raylib makefile for Desktop platforms, Raspberry Pi, Android and HTML5
#
#   Copyright (c) 2013-2017 Ramon Santamaria (@raysan5)
#
#   This software is provided "as-is", without any express or implied warranty. In no event
#   will the authors be held liable for any damages arising from the use of this software.
#
#   Permission is granted to anyone to use this software for any purpose, including commercial
#   applications, and to alter it and redistribute it freely, subject to the following restrictions:
#
#     1. The origin of this software must not be misrepresented; you must not claim that you
#     wrote the original software. If you use this software in a product, an acknowledgment
#     in the product documentation would be appreciated but is not required.
#
#     2. Altered source versions must be plainly marked as such, and must not be misrepresented
#     as being the original software.
#
#     3. This notice may not be removed or altered from any source distribution.
#
#**************************************************************************************************

.PHONY: all clean

# Define required raylib variables
# WARNING: To compile to HTML5, code must be redesigned to use emscripten.h and emscripten_set_main_loop()
PLATFORM ?= PLATFORM_DESKTOP
RAYLIB_PATH ?= ..\..
PROJECT_NAME ?= simple_game

# Library type used for raylib and OpenAL Soft: STATIC (.a) or SHARED (.so/.dll)
# NOTE: Libraries should be provided in the selected form
RAYLIB_LIBTYPE ?= STATIC
OPENAL_LIBTYPE ?= STATIC

# On PLATFORM_WEB force OpenAL Soft shared library
ifeq ($(PLATFORM),PLATFORM_WEB)
    OPENAL_LIBTYPE = SHARED
endif

# Determine PLATFORM_OS in case PLATFORM_DESKTOP selected
ifeq ($(PLATFORM),PLATFORM_DESKTOP)
    # No uname.exe on MinGW!, but OS=Windows_NT on Windows! ifeq ($(UNAME),Msys) -> Windows
    ifeq ($(OS),Windows_NT)
        PLATFORM_OS=WINDOWS
        LIBPATH=win32
    else
        UNAMEOS=$(shell uname)
        ifeq ($(UNAMEOS),Linux)
            PLATFORM_OS=LINUX
            LIBPATH=linux
        else
        ifeq ($(UNAMEOS),Darwin)
            PLATFORM_OS=OSX
            LIBPATH=osx
        endif
        endif
    endif
endif

ifeq ($(PLATFORM),PLATFORM_RPI)
    # RPI cross-compiler
    RPI_CROSS_COMPILE ?= NO
endif

ifeq ($(PLATFORM),PLATFORM_WEB)
    # Emscripten required variables
    EMSDK_PATH = C:/emsdk
    EMSCRIPTEN_VERSION = 1.37.9
    CLANG_VERSION=e1.37.9_64bit
    PYTHON_VERSION=2.7.5.3_64bit
    NODE_VERSION=4.1.1_64bit
    export PATH=$(EMSDK_PATH);$(EMSDK_PATH)\clang\$(CLANG_VERSION);$(EMSDK_PATH)\node\$(NODE_VERSION)\bin;$(EMSDK_PATH)\python\$(PYTHON_VERSION);$(EMSDK_PATH)\emscripten\$(EMSCRIPTEN_VERSION);C:\raylib\MinGW\bin:$$(PATH)
    EMSCRIPTEN=$(EMSDK_PATH)\emscripten\$(EMSCRIPTEN_VERSION)
endif

# Define raylib release directory for compiled library
ifeq ($(PLATFORM),PLATFORM_DESKTOP)
    ifeq ($(PLATFORM_OS),WINDOWS)
        RAYLIB_RELEASE = $(RAYLIB_PATH)/release/libs/win32/mingw32
    endif
    ifeq ($(PLATFORM_OS),LINUX)
        RAYLIB_RELEASE = $(RAYLIB_PATH)/release/libs/linux
    endif
    ifeq ($(PLATFORM_OS),OSX)
        RAYLIB_RELEASE = $(RAYLIB_PATH)/release/libs/osx
    endif
endif
ifeq ($(PLATFORM),PLATFORM_WEB)
    RAYLIB_RELEASE = $(RAYLIB_PATH)/release/libs/html5
endif
ifeq ($(PLATFORM),PLATFORM_RPI)
    RAYLIB_RELEASE = $(RAYLIB_PATH)/release/libs/rpi
endif

# Define default C compiler: gcc
CC = gcc

ifeq ($(PLATFORM),PLATFORM_DESKTOP)
    ifeq ($(PLATFORM_OS),OSX)
        # OSX default compiler
        CC = clang
    endif
endif
ifeq ($(PLATFORM),PLATFORM_RPI)
    ifeq ($(RPI_CROSS_COMPILE),YES)
        # RPI cross-compiler
        CC = armv6j-hardfloat-linux-gnueabi-gcc
    endif
endif
ifeq ($(PLATFORM),PLATFORM_WEB)
    # HTML5 emscripten compiler
    CC = emcc
endif

# Define default make program: Mingw32-make
MAKE = mingw32-make

ifeq ($(PLATFORM),PLATFORM_DESKTOP)
    ifeq ($(PLATFORM_OS),LINUX)
        MAKE = make
    endif
endif

# Define compiler flags:
#  -O1                  defines optimization level
#  -Og                  enable debugging
#  -s                   strip unnecessary data from build
#  -Wall                turns on most, but not all, compiler warnings
#  -std=c99             defines C language mode (standard C from 1999 revision)
#  -std=gnu99           defines C language mode (GNU C from 1999 revision)
#  -fgnu89-inline       declaring inline functions support (GCC optimized)
#  -Wno-missing-braces  ignore invalid warning (GCC bug 53119)
#  -D_DEFAULT_SOURCE    use with -std=c99 on Linux and PLATFORM_WEB, required for timespec
CFLAGS += -O1 -s -Wall -std=c99 -D_DEFAULT_SOURCE -fgnu89-inline -Wno-missing-braces

# Additional flags for compiler (if desired)
#CFLAGS += -Wextra -Wmissing-prototypes -Wstrict-prototypes
ifeq ($(PLATFORM),PLATFORM_DESKTOP)
    ifeq ($(PLATFORM_OS),LINUX)
        CFLAGS += -no-pie -D_DEFAULT_SOURCE
    endif
endif
ifeq ($(PLATFORM),PLATFORM_RPI)
    CFLAGS += -std=gnu99
endif
ifeq ($(PLATFORM),PLATFORM_WEB)
    # -O2                        # if used, also set --memory-init-file 0
    # --memory-init-file 0       # to avoid an external memory initialization code file (.mem)
    # -s ALLOW_MEMORY_GROWTH=1   # to allow memory resizing
    # -s TOTAL_MEMORY=16777216   # to specify heap memory size (default = 16MB)
    # -s USE_PTHREADS=1          # multithreading support
    CFLAGS += -s USE_GLFW=3 -s ASSERTIONS=1 --profiling -s TOTAL_MEMORY=16777216 --preload-file resources
endif

# Define include paths for required headers
# NOTE: Several external required libraries (stb and others)
INCLUDE_PATHS = -I. -I$(RAYLIB_PATH)/release/include -I$(RAYLIB_PATH)/src -I$(RAYLIB_PATH)/src/external

# Define additional directories containing required header files
ifeq ($(PLATFORM),PLATFORM_RPI)
    # RPI requried libraries
    INCLUDE_PATHS += -I/opt/vc/include
    INCLUDE_PATHS += -I/opt/vc/include/interface/vmcs_host/linux
    INCLUDE_PATHS += -I/opt/vc/include/interface/vcos/pthreads
endif

# Define library paths containing required libs
LDFLAGS = -L. -L$(RAYLIB_RELEASE) -L$(RAYLIB_PATH)/src 

ifeq ($(PLATFORM),PLATFORM_RPI)
    LDFLAGS += -L/opt/vc/lib
endif

# Define any libraries required on linking
# if you want to link libraries (libname.so or libname.a), use the -lname
ifeq ($(PLATFORM),PLATFORM_DESKTOP)
    ifeq ($(PLATFORM_OS),WINDOWS)
        # Libraries for Windows desktop compiling
        # NOTE: GLFW3 and OpenAL Soft libraries should be installed
        LDLIBS = -lraylib -lglfw3 -lopengl32 -lgdi32

        # Define required flags and libs for OpenAL Soft STATIC/SHARED usage
        # NOTE: ALLIBS flag only required for raylib Win32 SHARED library building
        ifeq ($(OPENAL_LIBTYPE),STATIC)
            LDLIBS += -lopenal32 -lwinmm
            CFLAGS += -DAL_LIBTYPE_STATIC -Wl,-allow-multiple-definition
        else
            LDLIBS += -lopenal32dll
        endif
    endif
    ifeq ($(PLATFORM_OS),LINUX)
        # Libraries for Debian GNU/Linux desktop compiling
        # NOTE: Required packages: libglfw3-dev libopenal-dev libegl1-mesa-dev
        LDLIBS = -lraylib -lglfw3 -lGL -lopenal -lm -lpthread -ldl
        
        # On XWindow requires also below libraries
        LDLIBS += -lX11 -lXrandr -lXinerama -lXi -lXxf86vm -lXcursor
    endif
    ifeq ($(PLATFORM_OS),OSX)
        # Libraries for OSX 10.9 desktop compiling
        # NOTE: Required packages: libglfw3-dev libopenal-dev libegl1-mesa-dev
        LDLIBS = -lraylib -lglfw -framework OpenGL -framework OpenAL -framework Cocoa
    endif
endif
ifeq ($(PLATFORM),PLATFORM_RPI)
    # Libraries for Raspberry Pi compiling
    # NOTE: Required packages: libopenal1
    LDLIBS = -lraylib -lGLESv2 -lEGL -lpthread -lrt -lm -lbcm_host -lopenal
endif
ifeq ($(PLATFORM),PLATFORM_WEB)
    # Libraries for web (HTML5) compiling
    LDLIBS = $(RAYLIB_RELEASE)/libraylib.bc
endif

# Define additional parameters and flags for windows
ifeq ($(PLATFORM_OS),WINDOWS)
    # resources file contains raylib icon for windows .exe
    # -Wl,--subsystem,windows hides the console window
    WINFLAGS = $(RAYLIB_PATH)/src/resources -Wl,--subsystem,windows
endif

# Define output extension to generate a .html file using provided shell
ifeq ($(PLATFORM),PLATFORM_WEB)
    EXT = .html
    WEB_SHELL = --shell-file $(RAYLIB_PATH)\templates\web_shell\shell.html
endif

# Define all source files required
PROJECT_SOURCE_FILES ?= simple_game.c

# Define all object files from source files
OBJS = $(patsubst %.c, %.o, $(PROJECT_SOURCE_FILES))

# For Android platform we call a custom Makefile.Android
ifeq ($(PLATFORM),PLATFORM_ANDROID)
    MAKEFILE_PARAMS = -f Makefile.Android 
    export PROJECT_NAME
    export PROJECT_SOURCE_FILES
else
    MAKEFILE_PARAMS = $(PROJECT_NAME)
endif

# Default target entry
# NOTE: We call this Makefile target or Makefile.Android target
all:
	$(MAKE) $(MAKEFILE_PARAMS)

# Project target defined by PROJECT_NAME
$(PROJECT_NAME): $(OBJS)
	$(CC) -o $(PROJECT_NAME)$(EXT) $(OBJS) $(CFLAGS) $(INCLUDE_PATHS) $(LDFLAGS) $(LDLIBS) -D$(PLATFORM) $(WINFLAGS)

# Compile source files
# NOTE: This pattern will compile every module defined on $(OBJS)
%.o: %.c
	$(CC) -c $< -o $@ $(CFLAGS) $(INCLUDE_PATHS) -D$(PLATFORM)

# Clean everything
clean:
ifeq ($(PLATFORM),PLATFORM_DESKTOP)
    ifeq ($(PLATFORM_OS),WINDOWS)
		del *.o *.exe /s
    endif
    ifeq ($(PLATFORM_OS),LINUX)
		find -type f -executable | xargs file -i | grep -E 'x-object|x-archive|x-sharedlib|x-executable' | rev | cut -d ':' -f 2- | rev | xargs rm -f
    endif
    ifeq ($(PLATFORM_OS),OSX)
		find . -type f -perm +ugo+x -delete
		rm -f *.o
    endif
endif
ifeq ($(PLATFORM),PLATFORM_RPI)
	find . -type f -executable -delete
	rm -f *.o
endif
ifeq ($(PLATFORM),PLATFORM_WEB)
	del *.o *.html *.js
endif
	@echo Cleaning done