#
# UPX top-level Makefile - needs GNU make and CMake >= 3.13
#

# INFO: this Makefile is just a convenience wrapper for calling CMake

# NOTE: if you only have an older CMake 3.x then you can invoke cmake manually like this:
#   mkdir -p build/release
#   cd build/release
#   cmake ../..
#   make -j     (or use "cmake --build . --parallel")

CMAKE = cmake
UPX_CMAKE_BUILD_FLAGS += --parallel
ifneq ($(VERBOSE),)
  UPX_CMAKE_BUILD_FLAGS += --verbose
endif
# enable this if you prefer Ninja for the actual builds:
#UPX_CMAKE_CONFIG_FLAGS += -G Ninja

#***********************************************************************
# default
#***********************************************************************

run_cmake_config = $(CMAKE) -S . -B $1 $(UPX_CMAKE_CONFIG_FLAGS) -DCMAKE_BUILD_TYPE=$2
run_cmake_build  = $(CMAKE) --build $1 $(UPX_CMAKE_BUILD_FLAGS) --config $2
# avoid re-running run_cmake_config if CMakeCache.txt already exists
run_config       = $(if $(wildcard $1/CMakeCache.txt),,$(call run_cmake_config,$1,$2))
run_build        = $(call run_cmake_build,$1,$2)

.DEFAULT_GOAL = build/release

build/debug: PHONY
	$(call run_config,$@,Debug)
	$(call run_build,$@,Debug)

build/release: PHONY
	$(call run_config,$@,Release)
	$(call run_build,$@,Release)

# shortcuts
all: build/debug build/release
debug: build/debug
release: build/release

.PHONY: PHONY
.NOTPARALLEL: # because the actual builds use "cmake --parallel"
.SUFFIXES:

# END of Makefile; extra stuff follows

#***********************************************************************
# extra builds: some pre-defined build configurations
#***********************************************************************

define run_config_and_build
	$(call run_config,$1,$2)
	$(call run_build,$1,$2)
endef

# force building with clang/clang++
build/extra/clang/debug:   PHONY; $(call run_config_and_build,$@,Debug)
build/extra/clang/release: PHONY; $(call run_config_and_build,$@,Release)
build/extra/clang/%: export CC  = clang
build/extra/clang/%: export CXX = clang++

# force building with clang/clang++ -m32
build/extra/clang-m32/debug:   PHONY; $(call run_config_and_build,$@,Debug)
build/extra/clang-m32/release: PHONY; $(call run_config_and_build,$@,Release)
build/extra/clang-m32/%: export CC  = clang -m32
build/extra/clang-m32/%: export CXX = clang++ -m32

# force building with clang/clang++ -mx32
build/extra/clang-mx32/debug:   PHONY; $(call run_config_and_build,$@,Debug)
build/extra/clang-mx32/release: PHONY; $(call run_config_and_build,$@,Release)
build/extra/clang-mx32/%: export CC  = clang -mx32
build/extra/clang-mx32/%: export CXX = clang++ -mx32

# force building with clang/clang++ -m64
build/extra/clang-m64/debug:   PHONY; $(call run_config_and_build,$@,Debug)
build/extra/clang-m64/release: PHONY; $(call run_config_and_build,$@,Release)
build/extra/clang-m64/%: export CC  = clang -m64
build/extra/clang-m64/%: export CXX = clang++ -m64

# force building with gcc/g++
build/extra/gcc/debug:   PHONY; $(call run_config_and_build,$@,Debug)
build/extra/gcc/release: PHONY; $(call run_config_and_build,$@,Release)
build/extra/gcc/%: export CC  = gcc
build/extra/gcc/%: export CXX = g++

# force building with gcc/g++ -m32
build/extra/gcc-m32/debug:   PHONY; $(call run_config_and_build,$@,Debug)
build/extra/gcc-m32/release: PHONY; $(call run_config_and_build,$@,Release)
build/extra/gcc-m32/%: export CC  = gcc -m32
build/extra/gcc-m32/%: export CXX = g++ -m32

# force building with gcc/g++ -mx32
build/extra/gcc-mx32/debug:   PHONY; $(call run_config_and_build,$@,Debug)
build/extra/gcc-mx32/release: PHONY; $(call run_config_and_build,$@,Release)
build/extra/gcc-mx32/%: export CC  = gcc -mx32
build/extra/gcc-mx32/%: export CXX = g++ -mx32

# force building with gcc/g++ -m64
build/extra/gcc-m64/debug:   PHONY; $(call run_config_and_build,$@,Debug)
build/extra/gcc-m64/release: PHONY; $(call run_config_and_build,$@,Release)
build/extra/gcc-m64/%: export CC  = gcc -m64
build/extra/gcc-m64/%: export CXX = g++ -m64

# force building with clang Static Analyzer (scan-build)
build/extra/scan-build/debug:   PHONY; $(call run_config_and_build,$@,Debug)
build/extra/scan-build/release: PHONY; $(call run_config_and_build,$@,Release)
build/extra/scan-build/%: CMAKE := scan-build $(CMAKE)
build/extra/scan-build/%: export CCC_CC  ?= clang
build/extra/scan-build/%: export CCC_CXX ?= clang++

# cross compiler: Linux glibc aarch64-linux-gnu
build/extra/cross-linux-aarch64/debug:   PHONY; $(call run_config_and_build,$@,Debug)
build/extra/cross-linux-aarch64/release: PHONY; $(call run_config_and_build,$@,Release)
build/extra/cross-linux-aarch64/%: export CC  = aarch64-linux-gnu-gcc
build/extra/cross-linux-aarch64/%: export CXX = aarch64-linux-gnu-g++

# cross compiler: Linux glibc arm-linux-gnueabihf
build/extra/cross-linux-arm/debug:   PHONY; $(call run_config_and_build,$@,Debug)
build/extra/cross-linux-arm/release: PHONY; $(call run_config_and_build,$@,Release)
build/extra/cross-linux-arm/%: export CC  = arm-linux-gnueabihf-gcc
build/extra/cross-linux-arm/%: export CXX = arm-linux-gnueabihf-g++ -Wno-psabi

# cross compiler: Windows x86 win32 MinGW
build/extra/cross-windows-mingw32/debug:   PHONY; $(call run_config_and_build,$@,Debug)
build/extra/cross-windows-mingw32/release: PHONY; $(call run_config_and_build,$@,Release)
build/extra/cross-windows-mingw32/%: export CC  = i686-w64-mingw32-gcc
build/extra/cross-windows-mingw32/%: export CXX = i686-w64-mingw32-g++

# cross compiler: Windows x64 win64 MinGW
build/extra/cross-windows-mingw64/debug:   PHONY; $(call run_config_and_build,$@,Debug)
build/extra/cross-windows-mingw64/release: PHONY; $(call run_config_and_build,$@,Release)
build/extra/cross-windows-mingw64/%: export CC  = x86_64-w64-mingw32-gcc
build/extra/cross-windows-mingw64/%: export CXX = x86_64-w64-mingw32-g++

# cross compiler: macOS arm64
build/extra/cross-darwin-arm64/debug:   PHONY; $(call run_config_and_build,$@,Debug)
build/extra/cross-darwin-arm64/release: PHONY; $(call run_config_and_build,$@,Release)
build/extra/cross-darwin-arm64/%: export CC  = clang -target arm64-apple-darwin
build/extra/cross-darwin-arm64/%: export CXX = clang++ -target arm64-apple-darwin

# cross compiler: macOS x86_64
build/extra/cross-darwin-x86_64/debug:   PHONY; $(call run_config_and_build,$@,Debug)
build/extra/cross-darwin-x86_64/release: PHONY; $(call run_config_and_build,$@,Release)
build/extra/cross-darwin-x86_64/%: export CC  = clang -target x86_64-apple-darwin
build/extra/cross-darwin-x86_64/%: export CXX = clang++ -target x86_64-apple-darwin

#***********************************************************************
# advanced: generic extra target
#***********************************************************************

# usage:
#   make UPX_XTARGET=my-target CC="my-cc -flags" CXX="my-cxx -flags"
#   make UPX_XTARGET=my-target CC="my-cc -flags" CXX="my-cxx -flags" xtarget/debug

ifneq ($(UPX_XTARGET),)
ifneq ($(CC),)
ifneq ($(CXX),)

UPX_XTARGET := $(UPX_XTARGET)
build/xtarget/$(UPX_XTARGET)/debug:   PHONY; $(call run_config_and_build,$@,Debug)
build/xtarget/$(UPX_XTARGET)/release: PHONY; $(call run_config_and_build,$@,Release)
build/xtarget/$(UPX_XTARGET)/%: export CC
build/xtarget/$(UPX_XTARGET)/%: export CXX
# shortcuts
xtarget/debug:   build/xtarget/$(UPX_XTARGET)/debug
xtarget/release: build/xtarget/$(UPX_XTARGET)/release
# set new default
.DEFAULT_GOAL = xtarget/release

endif
endif
endif

#***********************************************************************
# check git submodules
#***********************************************************************

SUBMODULES = doctest lzma-sdk ucl valgrind zlib

dummy := $(foreach m,$(SUBMODULES),$(if $(wildcard vendor/$m/[CL]*),$m,\
    $(error ERROR: missing git submodule $m; run 'git submodule update --init')))
