makefile/makefile.library

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#This program is free software: you can redistribute it and/or modify
#it under the terms of the GNU General Public License as published by
#the Free Software Foundation, either version 3 of the License, or
#(at your option) any later version.
#This program is distributed in the hope that it will be useful,
#but WITHOUT ANY WARRANTY; without even the implied warranty of
#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
#GNU General Public License for more details.
#You should have received a copy of the GNU General Public License
#along with this program. If not, see <http://www.gnu.org/licenses/>.
#Copyright 2018-2020 rexy712
#Makefile to generate a single static or shared library from all the sources in SOURCE_DIRS ending in EXT
ifeq ($(OS),Windows_NT)
WINDOWS::=1
endif
SOURCE_DIRS::=src
SOURCES::=
OBJDIR::=obj
DEPDIR::=$(OBJDIR)/dep
LIBDIR::=lib
INCLUDE_DIRS::=include
CFLAGS::=-g -std=c18 -Wall -pedantic -Wextra
CXXFLAGS::=-g -std=c++17 -Wall -pedantic -Wextra
EXT::=cpp
LANG::=$(EXT)
MAIN_LIBRARY::=tester
PRE_TARGETS::=
POST_TARGETS::=
CLEAN_TARGETS::=
SHARED?=1
STATIC?=0
RELEASE?=0
MEMCHK?=0
ifneq ($(WINDOWS),1)
#*nix settings
CC::=gcc
CXX::=g++
LDLIBS::=
LDFLAGS::=
STRIP::=strip
RANLIB::=ranlib
AR::=ar
AS::=as
else #windows
#windows settings
#windows is a fuckwit
MINGW_PREFIX::=x86_64-w64-mingw32-
CC::=$(MINGW_PREFIX)gcc
CXX::=$(MINGW_PREFIX)g++
LDLIBS::=
LDFLAGS::=-static-libgcc -static-libstdc++
STRIP::=$(MINGW_PREFIX)strip
RANLIB::=$(MINGW_PREFIX)ranlib
AR::=$(MINGW_PREFIX)ar
AS::=$(MINGW_PREFIX)as
endif #windows
#Put your custom targets for PRE_TARGETS and POST_TARGETS here:
###########################################################################################################
#Everything past this point is internal BS, probably best not to touch it unless you know what you're doing
#set the all target as the default target, otherwise the topmost target will run
.DEFAULT_GOAL::=all
#setup the actual output library name depending on shared/static and windows/anything else
ifeq ($(WINDOWS),1)
INTERNAL_SHARED_LIBRARY::=lib$(MAIN_LIBRARY).a
else
INTERNAL_SHARED_LIBRARY::=lib$(MAIN_LIBRARY).so
endif
SHARED_LIBRARY_FLAGS=-fPIC
DLLOUT::=$(MAIN_LIBRARY).dll
INTERNAL_STATIC_LIBRARY::=lib$(MAIN_LIBRARY).a
#system dependant bullshit
ifeq ($(OS),Windows_NT)
#windows' cmd commands
mkdir=mkdir $(subst /,\,$(1)) > NUL 2>&1
rm=del /F $(1) > NUL 2>&1
rmdir=rd /S /Q $(1) > NUL 2>&1
move=move /Y $(subst /,\,$(1)) $(subst /,\,$(2)) > NUL 2>&1
copy=copy /Y /B $(subst /,\,$(1)) $(subst /,\,$(2)) > NUL 2>&1
else
#*nix terminal commands
mkdir=mkdir -p $(1)
rm=rm -f $(1)
rmdir=rm -rf $(1)
move=mv $(1) $(2)
copy=cp $(1) $(2)
endif
#setup compiler and flags based on language
ifeq ($(LANG),cpp)
COMPILER_FLAGS::=$(CXXFLAGS)
COMPILER::=$(CXX)
else ifeq ($(LANG),c)
COMPILER_FLAGS::=$(CFLAGS)
COMPILER::=$(CC)
endif
ifeq ($(RELEASE),1)
#a lot of false strict aliasing warnings from gcc 9
COMPILER_FLAGS+=-O2 -Wno-strict-aliasing
POST_TARGETS+= do_strip
else ifeq ($(MEMCHK),1)
#use asan to check memory leaks/invalid accesses
LDFLAGS+=-fsanitize=address -fno-omit-frame-pointer -fno-optimize-sibling-calls
COMPILER_FLAGS+=-O0 -g3 -ggdb -fsanitize=address -fno-omit-frame-pointer -fno-optimize-sibling-calls
else
#default target
COMPILER_FLAGS+=-O0 -g3 -ggdb
endif
#add dependency tracking and include directories
INTERNAL_COMPILERFLAGS=-c $(foreach dir,$(INCLUDE_DIRS),-I"$(dir)") -MMD -MP -MF"$(DEPDIR)/$(notdir $(patsubst %.o,%.d,$@))"
ifeq ($(SHARED),1)
INTERNAL_COMPILERFLAGS+=$(SHARED_LIBRARY_FLAGS)
endif
THIS_MAKEFILE_NAME::=$(lastword $(MAKEFILE_LIST))
INTERNAL_SOURCES::=$(SOURCES) $(foreach source,$(SOURCE_DIRS),$(foreach ext,$(EXT),$(wildcard $(source)/*.$(ext))))
OBJECTS::=$(addprefix $(OBJDIR)/,$(subst \,.,$(subst /,.,$(addsuffix .o,$(INTERNAL_SOURCES)))))
#Arguments to make submake use this makefile without "Entering directory" stuff
SUBMAKE_ARGUMENTS::=--no-print-directory -f "$(THIS_MAKEFILE_NAME)"
#just a variable for a newline
define \n
endef
#default target: run targets in PRE_TARGETS, then build the main library, then POST_TARGETS
.PHONY: all
all:
$(foreach target,$(PRE_TARGETS),@$(MAKE) $(SUBMAKE_ARGUMENTS) "$(target)"$(\n))
ifeq ($(SHARED),1)
ifeq ($(WINDOWS),1)
@$(MAKE) $(SUBMAKE_ARGUMENTS) "$(DLLOUT)"
else #windows
@$(MAKE) $(SUBMAKE_ARGUMENTS) "$(INTERNAL_SHARED_LIBRARY)"
endif #windows
endif #shared
ifeq ($(STATIC),1)
ifeq ($(SHARED),1)
@$(MAKE) $(SUBMAKE_ARGUMENTS) "object_clean"
endif #shared
@$(MAKE) $(SUBMAKE_ARGUMENTS) "$(INTERNAL_STATIC_LIBRARY)" SHARED=0
endif #static
$(foreach target,$(POST_TARGETS),@$(MAKE) $(SUBMAKE_ARGUMENTS) "$(target)"$(\n))
ifeq ($(WINDOWS),1)
#target for windows shared library
$(DLLOUT): $(OBJECTS)
$(COMPILER) -shared -o "$(DLLOUT)" $^ -Wl,--out-implib,"lib$(MAIN_LIBRARY).a" $(SHARED_LIBRARY_FLAGS) $(LDLIBS) $(LDFLAGS)
else #windows
#target for *nix shared library
$(INTERNAL_SHARED_LIBRARY): $(OBJECTS)
$(COMPILER) -shared -o "$@" $^ $(COMPILER_FLAGS) $(SHARED_LIBRARY_FLAGS) $(LDFLAGS) $(LDLIBS)
endif #windows
#target for static library
$(INTERNAL_STATIC_LIBRARY): $(OBJECTS)
$(AR) rcs "$@" $^
$(RANLIB) "$@"
#Called in POST_TARGETS when RELEASE=1
.PHONY: do_strip
do_strip:
ifeq ($(SHARED),1)
$(STRIP) --strip-debug "$(INTERNAL_SHARED_LIBRARY)"
endif
ifeq ($(STATIC),1)
$(STRIP) --strip-debug "$(INTERNAL_STATIC_LIBRARY)"
endif
#Object target recipe
define GENERATE_OBJECTS
$$(OBJDIR)/$(subst \,.,$(subst /,.,$(1))).%.o: $(1)/%
$$(COMPILER) $$(COMPILER_FLAGS) $$(INTERNAL_COMPILERFLAGS) "$$<" -o "$$@"
endef
define GENERATE_INDIVIDUAL_OBJECTS
$$(OBJDIR)/$(subst \,.,$(subst /,.,$(1))).o: $(1)
$$(COMPILER) $$(COMPILER_FLAGS) $$(INTERNAL_COMPILERFLAGS) "$$<" -o "$$@"
endef
#Create targets for object files
$(foreach dir,$(SOURCE_DIRS),$(eval $(call GENERATE_OBJECTS,$(dir))))
$(foreach src,$(SOURCES),$(eval $(call GENERATE_INDIVIDUAL_OBJECTS,$(src))))
$(OBJECTS): | $(OBJDIR) $(DEPDIR)
$(OBJDIR):
$(call mkdir,"$@")
$(DEPDIR):
$(call mkdir,"$@")
.PHONY: object_clean
object_clean:
$(call rmdir,"$(OBJDIR)")
.PHONY: clean
clean: object_clean
$(foreach target,$(CLEAN_TARGETS),@$(MAKE) $(SUBMAKE_ARGUMENTS) "$(target)"$(\n))
$(call rmdir,"$(DEPDIR)")
$(call rm,"lib$(MAIN_LIBRARY).so")
$(call rm,"lib$(MAIN_LIBRARY).a")
$(call rm,"$(DLLOUT)")
#header file dep tracking
-include $(wildcard $(DEPDIR)/*.d)