path: root/Makefile

#* Btop++ makefile v1.6

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override BTOP_VERSION := $(shell head -n100 src/btop.cpp 2>/dev/null | grep "Version =" | cut -f2 -d"\"" || echo " unknown")
override TIMESTAMP := $(shell date +%s 2>/dev/null || echo "0")
override DATESTAMP := $(shell date '+%Y-%m-%d %H:%M:%S' || echo "5 minutes ago")
ifeq ($(shell command -v gdate >/dev/null; echo $$?),0)
	DATE_CMD := gdate
else
	DATE_CMD := date
endif

ifneq ($(QUIET),true)
	override QUIET := false
endif

OLDCXX := $(CXXFLAGS)
OLDLD := $(LDFLAGS)

PREFIX ?= /usr/local

#? Detect PLATFORM and ARCH from uname/gcc if not set
PLATFORM ?= $(shell uname -s || echo unknown)
ifneq ($(filter unknown Darwin, $(PLATFORM)),)
	override PLATFORM := $(shell $(CXX) -dumpmachine | awk -F"-" '{ print (NF==4) ? $$3 : $$2 }')
	ifeq ($(PLATFORM),apple)
		override PLATFORM := macos
	endif
endif
ifeq ($(shell uname -v | grep ARM64 >/dev/null 2>&1; echo $$?),0)
	ARCH ?= arm64
else
	ARCH ?= $(shell $(CXX) -dumpmachine | cut -d "-" -f 1)
endif

override PLATFORM_LC := $(shell echo $(PLATFORM) | tr '[:upper:]' '[:lower:]')

#? GPU Support
ifeq ($(PLATFORM_LC)$(ARCH),linuxx86_64)
	ifneq ($(STATIC),true)
		GPU_SUPPORT := true
	endif
endif
ifneq ($(GPU_SUPPORT),true)
	GPU_SUPPORT := false
endif

ifeq ($(GPU_SUPPORT),true)
	override ADDFLAGS += -DGPU_SUPPORT
endif

#? Compiler and Linker
ifeq ($(shell $(CXX) --version | grep clang >/dev/null 2>&1; echo $$?),0)
	override CXX_IS_CLANG := true
endif
override CXX_VERSION := $(shell $(CXX) -dumpfullversion -dumpversion || echo 0)
override CXX_VERSION_MAJOR := $(shell echo $(CXX_VERSION) | cut -d '.' -f 1)

CLANG_WORKS = false
GCC_WORKS = false
MIN_CLANG_VERSION = 16

#? Supported is Clang 16.0.0 and later
ifeq ($(CXX_IS_CLANG),true)
	ifeq ($(shell $(CXX) --version | grep Apple >/dev/null 2>&1; echo $$?),0)
		MIN_CLANG_VERSION := 15
	endif
	ifneq ($(shell test $(CXX_VERSION_MAJOR) -lt $(MIN_CLANG_VERSION); echo $$?),0)
		CLANG_WORKS := true
	endif
endif
ifeq ($(CLANG_WORKS),false)
	#? Try to find a newer GCC version
	ifeq ($(shell command -v g++-13 >/dev/null; echo $$?),0)
		CXX := g++-13
	else ifeq ($(shell command -v g++13 >/dev/null; echo $$?),0)
		CXX := g++13
	else ifeq ($(shell command -v g++-12 >/dev/null; echo $$?),0)
		CXX := g++-12
	else ifeq ($(shell command -v g++12 >/dev/null; echo $$?),0)
		CXX := g++12
	else ifeq ($(shell command -v g++-11 >/dev/null; echo $$?),0)
		CXX := g++-11
	else ifeq ($(shell command -v g++11 >/dev/null; echo $$?),0)
		CXX := g++11
	else ifeq ($(shell command -v g++ >/dev/null; echo $$?),0)
		CXX := g++
	else
		GCC_NOT_FOUND := true
	endif
	ifndef GCC_NOT_FOUND
		override CXX_VERSION := $(shell $(CXX) -dumpfullversion -dumpversion || echo 0)
		override CXX_VERSION_MAJOR := $(shell echo $(CXX_VERSION) | cut -d '.' -f 1)
		ifneq ($(shell test $(CXX_VERSION_MAJOR) -lt 10; echo $$?),0)
			GCC_WORKS := true
		endif
	endif
endif

ifeq ($(CLANG_WORKS),false)
	ifeq ($(GCC_WORKS),false)
$(error $(shell printf "\033[1;91mERROR: \033[97mCompiler too old. (Requires Clang 16.0.0, GCC 10.1.0)\033[0m"))
	endif
endif

#? Any flags added to TESTFLAGS must not contain whitespace for the testing to work
override TESTFLAGS := -fexceptions -fstack-clash-protection -fcf-protection
ifneq ($(PLATFORM) $(ARCH),macos arm64)
	override TESTFLAGS += -fstack-protector
endif

ifeq ($(STATIC),true)
	ifeq ($(CXX_IS_CLANG) $(CLANG_WORKS),true true)
		ifeq ($(shell $(CXX) -print-target-triple | grep gnu >/dev/null; echo $$?),0)
$(error $(shell printf "\033[1;91mERROR: \033[97m$(CXX) can't statically link glibc\033[0m"))
		endif
	else
		override ADDFLAGS += -static-libgcc -static-libstdc++
	endif
	ifeq ($(PLATFORM_LC),linux)
		override ADDFLAGS += -DSTATIC_BUILD -static -Wl,--fatal-warnings
	else ifeq ($(PLATFORM_LC),freebsd)
		override ADDFLAGS += -DSTATIC_BUILD
	endif
endif

ifeq ($(STRIP),true)
	override ADDFLAGS += -s
endif

ifeq ($(VERBOSE),true)
	override VERBOSE := false
else
	override VERBOSE := true
endif

#? Pull in platform specific source files and get thread count
ifeq ($(PLATFORM_LC),linux)
	PLATFORM_DIR := linux
	THREADS	:= $(shell getconf _NPROCESSORS_ONLN 2>/dev/null || echo 1)
	SU_GROUP := root
else ifeq ($(PLATFORM_LC),freebsd)
	PLATFORM_DIR := freebsd
	THREADS	:= $(shell getconf NPROCESSORS_ONLN 2>/dev/null || echo 1)
	SU_GROUP := wheel
	override ADDFLAGS += -lm -lkvm -ldevstat -Wl,-rpath=/usr/local/lib/gcc$(CXX_VERSION_MAJOR)
	ifneq ($(STATIC),true)
		override ADDFLAGS += -lstdc++
	endif
	export MAKE = gmake
else ifeq ($(PLATFORM_LC),macos)
	PLATFORM_DIR := osx
	THREADS	:= $(shell sysctl -n hw.ncpu || echo 1)
	override ADDFLAGS += -framework IOKit -framework CoreFoundation -Wno-format-truncation
	SU_GROUP := wheel
else
$(error $(shell printf "\033[1;91mERROR: \033[97mUnsupported platform ($(PLATFORM))\033[0m"))
endif

#? Use all CPU cores (will only be set if using Make 4.3+)
MAKEFLAGS := --jobs=$(THREADS)
ifeq ($(THREADS),1)
	override THREADS := auto
endif

#? LTO command line
ifeq ($(CLANG_WORKS),true)
	LTO := thin
else
	LTO := $(THREADS)
endif

#? The Directories, Source, Includes, Objects and Binary
SRCDIR		:= src
INCDIRS		:= include $(wildcard lib/**/include)
BUILDDIR	:= obj
TARGETDIR	:= bin
SRCEXT		:= cpp
DEPEXT		:= d
OBJEXT		:= o

#? Filter out unsupported compiler flags
override GOODFLAGS := $(foreach flag,$(TESTFLAGS),$(strip $(shell echo "int main() {}" | $(CXX) -o /dev/null $(flag) -x c++ - >/dev/null 2>&1 && echo $(flag) || true)))

#? Flags, Libraries and Includes
override REQFLAGS   := -std=c++20
WARNFLAGS			:= -Wall -Wextra -pedantic
OPTFLAGS			:= -O2 -ftree-vectorize -flto=$(LTO)
LDCXXFLAGS			:= -pthread -D_FORTIFY_SOURCE=2 -D_GLIBCXX_ASSERTIONS -D_FILE_OFFSET_BITS=64 $(GOODFLAGS) $(ADDFLAGS)
override CXXFLAGS	+= $(REQFLAGS) $(LDCXXFLAGS) $(OPTFLAGS) $(WARNFLAGS)
override LDFLAGS	+= $(LDCXXFLAGS) $(OPTFLAGS) $(WARNFLAGS)
INC					:= $(foreach incdir,$(INCDIRS),-isystem $(incdir)) -I$(SRCDIR)
SU_USER				:= root

ifdef DEBUG
	override OPTFLAGS := -O0 -g
endif

SOURCES	:= $(sort $(shell find $(SRCDIR) -maxdepth 1 -type f -name *.$(SRCEXT)))

SOURCES += $(sort $(shell find $(SRCDIR)/$(PLATFORM_DIR) -type f -name *.$(SRCEXT)))

#? Setup percentage progress
SOURCE_COUNT := $(words $(SOURCES))

OBJECTS	:= $(patsubst $(SRCDIR)/%,$(BUILDDIR)/%,$(SOURCES:.$(SRCEXT)=.$(OBJEXT)))

ifeq ($(shell find $(BUILDDIR) -type f -newermt "$(DATESTAMP)" -name *.o >/dev/null 2>&1; echo $$?),0)
	ifneq ($(wildcard $(BUILDDIR)/.*),)
		SKIPPED_SOURCES := $(foreach fname,$(SOURCES),$(shell find $(BUILDDIR) -type f -newer $(fname) -name *.o | grep "$(basename $(notdir $(fname))).o" 2>/dev/null))
		override SOURCE_COUNT := $(shell expr $(SOURCE_COUNT) - $(words $(SKIPPED_SOURCES)))
		ifeq ($(SOURCE_COUNT),0)
			override SOURCE_COUNT = $(words $(SOURCES))
		endif
	endif
	PROGRESS = expr $$(find $(BUILDDIR) -type f -newermt "$(DATESTAMP)" -name *.o | wc -l || echo 1) '*' 90 / $(SOURCE_COUNT) | cut -c1-2
else
	PROGRESS = expr $$(find $(BUILDDIR) -type f -name *.o | wc -l || echo 1) '*' 90 / $(SOURCE_COUNT) | cut -c1-2
endif

P := %%

ifeq ($(VERBOSE),true)
	# Doesn't work with `&>`
	override SUPPRESS := > /dev/null 2> /dev/null
else
	override SUPPRESS :=
endif

#? Default Make
.ONESHELL:
all: |