brlib Makefile
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281
c/brlib/Makefile
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281
c/brlib/Makefile
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# brlib Makefile - GNU make only
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#
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# Copyright (C) 2021-2023 Bruno Raoult ("br")
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# Licensed under the GNU General Public License v3.0 or later.
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# Some rights reserved. See COPYING.
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#
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# You should have received a copy of the GNU General Public License along with this
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# program. If not, see <https://www.gnu.org/licenses/gpl-3.0-standalone.html>.
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#
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# SPDX-License-Identifier: GPL-3.0-or-later <https://spdx.org/licenses/GPL-3.0-or-later.html>
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#
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# important to know where exactly is project root dir
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ROOTDIR := $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
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SHELL := /bin/bash
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CC := gcc
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LD := ld
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BEAR := bear
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TOUCH := touch
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RM := rm
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RMDIR := rmdir
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SRCDIR := ./src
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INCDIR := ./include
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OBJDIR := ./obj
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LIBDIR := ./lib
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BINDIR := ./bin
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DEPDIR := ./dep
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SRC := $(wildcard $(SRCDIR)/*.c) # brlib sources
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SRC_FN := $(notdir $(SRC)) # source basename
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OBJ := $(addprefix $(OBJDIR)/,$(SRC_FN:.c=.o))
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LIB := br_$(shell uname -m) # library name
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SLIB := $(addsuffix .a, $(LIBDIR)/lib$(LIB)) # static lib
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DLIB := $(addsuffix .so, $(LIBDIR)/lib$(LIB)) # dynamic lib
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DEP_FN := $(SRC_FN) $(LIBSRC_FN)
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DEP := $(addprefix $(DEPDIR)/,$(DEP_FN:.c=.d))
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##################################### emacs projectile/ccls
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PRJROOT := .projectile
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CCLSROOT := .ccls-root
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CCLSCMDS := compile_commands.json
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##################################### pre-processor flags
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CPPFLAGS := -I$(INCDIR)
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#CPPFLAGS += -DDEBUG # global
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CPPFLAGS += -DDEBUG_DEBUG # enable log() functions
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#CPPFLAGS += -DDEBUG_DEBUG_C # log() funcs debug
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PPFLAGS += -DDEBUG_DEBUG # activate logs funcs
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CPPFLAGS += -DDEBUG_POOL # mem pools
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# remove extraneous spaces (due to spaces before comments)
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CPPFLAGS := $(strip $(CPPFLAGS))
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##################################### compiler flags
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CFLAGS := -std=gnu11
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CFLAGS += -O2
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CFLAGS += -g
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CFLAGS += -Wall
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CFLAGS += -Wextra
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CFLAGS += -march=native
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CFLAGS += -Wmissing-declarations
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CFLAGS += -Wno-unused-result
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CFLAGS += -fPIC
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# for gprof
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#CFLAGS += -pg
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# Next one may be useful for valgrind (some invalid instructions)
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# CFLAGS += -mno-tbm
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CFLAGS := $(strip $(CFLAGS))
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##################################### archiver/linker/dependency flags
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ARFLAGS := rcs
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LDFLAGS := -L$(LIBDIR)
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DEPFLAGS = -MMD -MP -MF $(DEPDIR)/$*.d
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##################################### General targets
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.PHONY: all compile clean cleanall
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all: libs
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compile: objs
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clean: cleandep cleanobj cleanlib cleanbin
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cleanall: clean cleandepdir cleanobjdir cleanlibdir cleanbindir
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# setup emacs projectile/ccls
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emacs: emacs-setup
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# update compile-commands.json
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ccls: $(CCLSCMDS)
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##################################### cleaning functions
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# rmfiles - deletes a list of files in a directory if they exist.
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# $(1): the directory
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# $(2): the list of files to delete
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# $(3): The string to include in action output - "cleaning X files."
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# see: https://stackoverflow.com/questions/6783243/functions-in-makefiles
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#
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# Don't use wildcard like "$(DIR)/*.o", so we can control mismatches between
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# list and actual files in directory.
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# See rmdir below.
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define rmfiles
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@#echo "rmfiles=+$(1)+"
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$(eval $@_EXIST = $(wildcard $(1)))
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@#echo "existfile=+${$@_EXIST}+"
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@if [[ -n "${$@_EXIST}" ]]; then \
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echo "cleaning $(2) files." ; \
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$(RM) ${$@_EXIST} ; \
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fi
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endef
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# rmdir - deletes a directory if it exists.
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# $(1): the directory
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# $(2): The string to include in action output - "removing X dir."
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#
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# Don't use $(RM) -rf, to control unexpected dep files.
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# See rmfile above.
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define rmdir
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@#echo "rmdir +$(1)+"
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$(eval $@_EXIST = $(wildcard $(1)))
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@#echo "existdir=+${$@_EXIST}+"
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@if [[ -n "${$@_EXIST}" ]]; then \
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echo "removing $(2) dir." ; \
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$(RMDIR) ${$@_EXIST} ; \
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fi
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endef
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##################################### dirs creation
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.PHONY: alldirs
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ALLDIRS := $(DEPDIR) $(OBJDIR) $(LIBDIR) $(BINDIR)
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alldirs: $(ALLDIRS)
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# Here, we have something like:
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# a: a
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# a will be built if (1) older than a, or (2) does not exist. Here only (2).
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$(ALLDIRS): $@
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@echo creating $@ directory.
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@mkdir -p $@
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##################################### Dependencies files
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.PHONY: cleandep cleandepdir
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-include $(wildcard $(DEP))
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# Don't use $(DEPDIR)/*.d, to control mismatches between dep and src files.
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# See second rule below.
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cleandep:
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$(call rmfiles,$(DEP),depend)
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@#echo cleaning dependency files.
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@#$(RM) -f $(DEP)
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cleandepdir:
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$(call rmdir,$(DEPDIR),depend)
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@#[ -d $(DEPDIR) ] && echo cleaning depend files && $(RM) -f $(DEP) || true
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##################################### objects
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.PHONY: objs cleanobj cleanobjdir
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objs: $(OBJ)
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cleanobj:
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$(call rmfiles,$(OBJ),brlib object)
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cleanobjdir:
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$(call rmdir,$(OBJDIR),brlib objects)
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$(OBJDIR)/%.o: $(SRCDIR)/%.c | $(OBJDIR) $(DEPDIR)
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@echo compiling $< "->" $@.
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$(CC) -c $(DEPFLAGS) $(CPPFLAGS) $(CFLAGS) $< -o $@
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##################################### brlib libraries
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.PHONY: libs cleanlib cleanlibdir
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libs: $(DLIB) $(SLIB)
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cleanlib:
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$(call rmfiles,$(DLIB) $(SLIB),library)
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cleanlibdir:
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$(call rmdir,$(LIBDIR),libraries)
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#$(DLIB): CFLAGS += -fPIC
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$(DLIB): LDFLAGS += -shared
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$(DLIB): $(OBJ) | $(LIBDIR)
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@echo "building $@ shared library ($?)."
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$(CC) $(CFLAGS) $(LDFLAGS) $? -o $@
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$(SLIB): $(OBJ) | $(LIBDIR)
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@echo "building $@ static library ($?)."
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$(AR) $(ARFLAGS) $@ $? > /dev/null
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##################################### brchess binaries
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.PHONY: targets cleanbin cleanbindir
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targets: $(TARGET)
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cleanbin:
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$(call rmfiles,$(TARGET),binary)
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cleanbindir:
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$(call rmdir,$(BINDIR),binaries)
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##################################### pre-processed (.i) and assembler (.s) output
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%.i: %.c
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@echo generating $@
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@$(CC) -E $(CPPFLAGS) $(CFLAGS) $< -o $@
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%.s: %.c
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@echo generating $@
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@$(CC) -S -fverbose-asm $(CPPFLAGS) $(CFLAGS) $< -o $@
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##################################### LSP (ccls)
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.PHONY: emacs-setup
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PRJROOT := .projectile
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CCLSROOT := .ccls-root
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CCLSFILE := .ccls
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CCLSCMDS := compile_commands.json
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emacs-setup: $(PRJROOT) $(CCLSROOT) $(CCLSCMDS)
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#$(CCLSFILE):
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# @echo "creating CCLS's $@ project root file."
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# echo '%compile_commands.json' > $@
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$(CCLSROOT) $(PRJROOT):
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@if [[ $(@) = $(PRJROOT) ]] ; \
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then \
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echo "creating Emacs's projectile root file." ; \
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else \
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echo "creating Emacs's ccls root file." ; \
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fi
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@$(TOUCH) $@
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# generate compile_commands.json.
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# TODO: add includes and Makefile dependencies.
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# also, if cclsfile is newer than sources, no need to clean objects file
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# (and to run bear).
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# maybe run cleanobj cleanlibobj in commands ?
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$(CCLSCMDS): cleanobj $(SRC) | $(CCLSROOT)
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@echo "Generating ccls compile commands file ($@)."
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@$(BEAR) -- make compile
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#.PHONY: bear
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#bear: cleanobj cleanlibobj Makefile | $(CCLSROOT)
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# @$(BEAR) -- make compile
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##################################### valgrind (mem check)
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.PHONY: memcheck
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VALGRIND := valgrind
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VALGRINDFLAGS := --leak-check=full --show-leak-kinds=all
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VALGRINDFLAGS += --track-origins=yes --sigill-diagnostics=yes
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VALGRINDFLAGS += --quiet --show-error-list=yes
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VALGRINDFLAGS += --log-file=valgrind.out
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# We need to suppress libreadline leaks here. See :
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# https://stackoverflow.com/questions/72840015
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VALGRINDFLAGS += --suppressions=etc/libreadline.supp
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memcheck: targets
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@$(VALGRIND) $(VALGRINDFLAGS) $(BINDIR)/brchess
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##################################### Makefile debug
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.PHONY: showflags wft
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showflags:
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@echo CFLAGS: "$(CFLAGS)"
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@echo CPPFLAGS: $(CPPFLAGS)
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@echo DEPFLAGS: $(DEPFLAGS)
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@echo LDFLAGS: $(LDFLAGS)
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wtf:
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@printf "ROOTDIR=+%s+\n\n" "$(ROOTDIR)"
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@printf "OBJDIR=%s\n\n" "$(OBJDIR)"
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@printf "OBJ=%s\n\n" "$(OBJ)"
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