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Simplify C code makefile #4

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Simplify C code makefile #4

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82 changes: 34 additions & 48 deletions c_src/Makefile
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Original file line number Diff line number Diff line change
@@ -1,68 +1,54 @@
CURDIR := $(shell pwd)
BASEDIR := $(abspath $(CURDIR)/..)

ERL ?= erl
PKG_CONFIG ?= pkg-config

# System specific C compiler/flags.
UNAME_SYS := $(shell uname -s)
ifeq ($(UNAME_SYS), Darwin)
DARWIN_ARCH := $(shell uname -m)
CC ?= cc
CFLAGS ?= -O2 -arch $(DARWIN_ARCH) -finline-functions -Wall -Wmissing-prototypes
LDFLAGS ?= -arch $(DARWIN_ARCH) -flat_namespace -undefined dynamic_lookup
else ifeq ($(UNAME_SYS), FreeBSD)
CC ?= cc
CFLAGS ?= -O2 -finline-functions -Wall -Wmissing-prototypes
else ifeq ($(UNAME_SYS), Linux)
CC ?= gcc
CFLAGS ?= -O2 -finline-functions -Wall -Wmissing-prototypes
endif
BUILD_DIR := _build
INSTALL_DIR := ../priv

# Project specific C compiler/flags.
ifeq ($(ERTS_INCLUDE_DIR),)
ERTS_INCLUDE_DIR := $(shell "$(ERL)" -noshell -eval "io:format(\"~ts/erts-~ts/include/\", [code:root_dir(), erlang:system_info(version)])." -s erlang halt)
endif
CFLAGS ?= -O3 -finline-functions -Wall -Wmissing-prototypes

CFLAGS += -std=c11 -fPIC -I $(ERTS_INCLUDE_DIR)
CFLAGS += $(shell $(PKG_CONFIG) --cflags libusb-1.0)
ERTS_CFLAGS ?= -I$(shell "$(ERL)" -noshell -eval "io:format(\"~ts/erts-~ts/include/\", [code:root_dir(), erlang:system_info(version)])." -s erlang halt)
ERTS_LDFLAGS ?=

LDFLAGS += -shared
LDFLAGS += $(shell $(PKG_CONFIG) --libs libusb-1.0)
LIBUSB_CFLAGS ?= $(shell $(PKG_CONFIG) --cflags libusb-1.0)
LIBUSB_LDFLAGS ?= $(shell $(PKG_CONFIG) --libs libusb-1.0)

# Verbosity.
V ?= 0
# System specific compiler/linker flags.
UNAME_SYS := $(shell uname -s)
ifeq ($(UNAME_SYS), Darwin)
LDFLAGS ?= -flat_namespace -undefined dynamic_lookup
endif

c_verbose_0 = @echo " C " $(@F);
c_verbose = $(c_verbose_$(V))
CFLAGS += -std=c11 -fPIC $(ERTS_CFLAGS) $(LIBUSB_CFLAGS)
LDFLAGS += -shared $(ERTS_LDFLAGS) $(LIBUSB_LDFLAGS)

link_verbose_0 = @echo " LD " $(@F);
link_verbose = $(link_verbose_$(V))
#
# Targets
#

# Files
HEADERS := $(wildcard *.h)
.PHONY: all
all: $(BUILD_DIR)/usb_nif.so

# Rules
.PHONY: install
install: _build/usb_nif.so | $(BASEDIR)/priv/
cp $^ $(BASEDIR)/priv

.PHONY: all
all: _build/usb_nif.so
install: $(BUILD_DIR)/usb_nif.so | $(INSTALL_DIR)/
cp $(BUILD_DIR)/usb_nif.so $(INSTALL_DIR)/

.PHONY: clean
clean:
rm -f "$(BASEDIR)/priv/usb_nif.so"
rm -Rf "_build/"
rm -f "$(INSTALL_DIR)/usb_nif.so"
rm -Rf "$(BUILD_DIR)/"

_build/%.so: _build/%.o $(MAKEFILE_LIST) | _build/
$(link_verbose) $(CC) "$<" $(LDFLAGS) -o "$@"
#
# Build
#

_build/%.o: %.c $(HEADERS) $(MAKEFILE_LIST) | _build/
$(c_verbose) $(CC) $(CFLAGS) $(CPPFLAGS) -c "$<" -o "$@"
SOURCES := usb_nif.c
HEADERS := khash.h

_build/:
mkdir -p "$@"
$(BUILD_DIR)/usb_nif.o: $(SOURCES) $(HEADERS) $(MAKEFILE_LIST) | $(BUILD_DIR)/
$(CC) $(CFLAGS) -c $(SOURCES) -o "$@"

$(BUILD_DIR)/usb_nif.so: $(BUILD_DIR)/usb_nif.o $(MAKEFILE_LIST) | $(BUILD_DIR)/
$(CC) $(BUILD_DIR)/usb_nif.o $(LDFLAGS) -o "$@"

$(BASEDIR)/priv/:
$(BUILD_DIR)/:
mkdir -p "$@"
4 changes: 2 additions & 2 deletions rebar.config
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Original file line number Diff line number Diff line change
Expand Up @@ -4,8 +4,8 @@
{deps, []}.

{pre_hooks, [
{"(linux|darwin|solaris)", compile, "make -C c_src"},
{"(freebsd)", compile, "gmake -C c_src"}
{"(linux|darwin|solaris)", compile, "make -C c_src install"},
{"(freebsd)", compile, "gmake -C c_src install"}
]}.
{post_hooks, [
{"(linux|darwin|solaris)", clean, "make -C c_src clean"},
Expand Down