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# $@: name of the target file (one before colon)
# $<: name of first prerequisite file (first one after colon)
# $^: names of all prerequisite files (space separated)
# $*: stem (bit which matches the % wildcard in rule definition)
#
# VAR = val: Normal setting - values within are recursively expand when var used.
# VAR := val: Setting of var with simple expansion of values inside - values are expanded at decl time.
# VAR ?= val: Set var only if it doesn't have a value.
# VAR += val: Append val to existing value (or set if var didn't exist).
# To use static analyzer:
# http://clang-analyzer.llvm.org/scan-build.html
# Ie:
# scan-build -k -V --use-analyzer ~/bin/clang make
NAME = inotify-info
CFG ?= release
ifeq ($(CFG), debug)
ASAN ?= 1
endif
LD = $(CC)
RM = rm -f
MKDIR = mkdir -p
VERBOSE ?= 0
INOTIFYINFO_VERSION ?= $(shell git describe --tags --dirty 2>/dev/null || echo unknown)
COMPILER = $(shell $(CC) -v 2>&1 | grep -q "clang version" && echo clang || echo gcc)
WARNINGS = -Wall -Wextra -Wpedantic -Wmissing-include-dirs -Wformat=2 -Wshadow
ifneq ($(COMPILER),clang)
# https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html
WARNINGS += -Wsuggest-attribute=format -Wall
endif
DEFINES = -D_LARGEFILE64_SOURCE=1 -D_FILE_OFFSET_BITS=64
DEFINES += -DINOTIFYINFO_VERSION=\"$(INOTIFYINFO_VERSION)\"
CFLAGS += $(WARNINGS) $(DEFINES)
CFLAGS += -std=gnu99 -fno-exceptions
CXXFLAGS += $(WARNINGS) $(DEFINES)
CXXFLAGS += -std=c++11 -fno-exceptions -fno-rtti -Woverloaded-virtual
LIBS = -Wl,--no-as-needed -lm -ldl -lpthread -lstdc++
CFILES = \
inotify-info.cpp \
lfqueue/lfqueue.c
# Useful GCC address sanitizer checks not enabled by default
# https://kristerw.blogspot.com/2018/06/useful-gcc-address-sanitizer-checks-not.html
ifeq ($(ASAN), 1)
# https://gcc.gnu.org/gcc-5/changes.html
# -fsanitize=float-cast-overflow: check that the result of floating-point type to integer conversions do not overflow;
# -fsanitize=vptr: enable checking of C++ member function calls, member accesses and some conversions between pointers to base and derived classes, detect if the referenced object does not have the correct dynamic type.
ASAN_FLAGS = -fno-omit-frame-pointer -fno-optimize-sibling-calls
ASAN_FLAGS += -fsanitize=address # fast memory error detector (heap, stack, global buffer overflow, and use-after free)
ASAN_FLAGS += -fsanitize=leak # detect leaks
ASAN_FLAGS += -fsanitize=undefined # fast undefined behavior detector
ASAN_FLAGS += -fsanitize=float-divide-by-zero # detect floating-point division by zero;
ASAN_FLAGS += -fsanitize=bounds # enable instrumentation of array bounds and detect out-of-bounds accesses;
ASAN_FLAGS += -fsanitize=object-size # enable object size checking, detect various out-of-bounds accesses.
ASAN_FLAGS += -fsanitize=alignment # enable alignment checking, detect various misaligned objects;
CFLAGS += $(ASAN_FLAGS)
CXXFLAGS += $(ASAN_FLAGS)
LDFLAGS += $(ASAN_FLAGS)
endif
ifeq ($(CFG), debug)
ODIR=_debug
CFLAGS += -O0 -DDEBUG
CFLAGS += -D_GLIBCXX_DEBUG -D_GLIBCXX_DEBUG_PEDANTIC -D_GLIBCXX_SANITIZE_VECTOR -D_LIBCPP_DEBUG=1 -D_LIBCPP_ENABLE_DEBUG_MODE=1
else
ODIR=_release
CFLAGS += -O2 -DNDEBUG
endif
PROJ = $(ODIR)/$(NAME)
ifeq ($(VERBOSE), 1)
VERBOSE_PREFIX=
else
VERBOSE_PREFIX=@
endif
C_OBJS = ${CFILES:%.c=${ODIR}/%.o}
OBJS = ${C_OBJS:%.cpp=${ODIR}/%.o}
all: $(PROJ)
$(ODIR)/$(NAME): $(OBJS)
@echo "Linking $@...";
$(VERBOSE_PREFIX)$(LD) $(LDFLAGS) $^ $(LIBS) -o $@
-include $(OBJS:.o=.d)
$(ODIR)/%.o: %.c Makefile
$(VERBOSE_PREFIX)echo "---- $< ----";
@$(MKDIR) $(dir $@)
$(VERBOSE_PREFIX)$(CC) -MMD -MP $(CFLAGS) -o $@ -c $<
$(ODIR)/%.o: %.cpp Makefile
$(VERBOSE_PREFIX)echo "---- $< ----";
@$(MKDIR) $(dir $@)
$(VERBOSE_PREFIX)$(CXX) -MMD -MP $(CXXFLAGS) -o $@ -c $<
.PHONY: lint
lint:
find . -name '*.h' -o -name '*.c' -o -name '*.cpp' | xargs clang-format -i --style=webkit
.PHONY: clean
clean:
@echo Cleaning...
$(VERBOSE_PREFIX)$(RM) $(PROJ)
$(VERBOSE_PREFIX)$(RM) $(OBJS)
$(VERBOSE_PREFIX)$(RM) $(OBJS:.o=.d)
$(VERBOSE_PREFIX)$(RM) $(OBJS:.o=.dwo)
define RELEASE_RULES
inotify-info-$(TAG).tar.gz:
git archive --prefix=inotify-info-$(TAG)/ v$(TAG) | gzip -n > $$@
endef
$(foreach TAG,$(shell git tag 2>/dev/null | sed -n '/^v/ s/^v//p'),$(eval $(RELEASE_RULES)))
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