makefile

# Makefile for Wirepas Dbus Sink module

# Toolchain
CC  := gcc
AS  := as
LD  := ld
AR  := ar

# Paths, including trailing path separator
SOURCEPREFIX   := source/
BUILDPREFIX    := build/

# This example needs the mesh lib
MESH_LIB_FOLDER := c-mesh-api/lib/
MESH_LIB := $(MESH_LIB_FOLDER)build/mesh_api_lib.a

# General compiler flags
CFLAGS  := -std=gnu99 -Wall -Werror `pkg-config --cflags libsystemd`

# Targets definition
MAIN_APP := sinkService

TARGET_APP := $(BUILDPREFIX)$(MAIN_APP)

# Add Api header (including logger files)
CFLAGS  += -I$(MESH_LIB_FOLDER)api
# Add pthtread lib as needed by Mesh Lib
LDFLAGS += -pthread
# Add Reentrant flag as using pthread
CFLAGS  += -D_REENTRANT

# Add systemd lib as needed for sd-bus
LDFLAGS += `pkg-config --libs libsystemd`

# Add current directory for headers
CFLAGS  += -I$(SOURCEPREFIX)

# Specific sources for this application
SOURCES := $(SOURCEPREFIX)main.c
SOURCES += $(SOURCEPREFIX)config.c
SOURCES += $(SOURCEPREFIX)data.c
SOURCES += $(SOURCEPREFIX)otap.c

OBJECTS := $(patsubst $(SOURCEPREFIX)%,                     \
                  $(BUILDPREFIX)%,                          \
                  $(SOURCES:.c=.o))

# Functions

# Also create the target directory if it does not exist
define COMPILE
	echo "  CC $(2)"
	mkdir -p $(dir $(1))
	$(CC) $(CFLAGS) -c -o $(1) $(2)
endef

define LINK
	echo "  Linking $(1)"
	$(CC) $(CFLAGS) -o $(1) $(2) $(MESH_LIB) $(LDFLAGS)
endef

define CLEAN
	echo "  Cleaning up"
	$(RM) -r $(BUILDPREFIX)
	make -C $(MESH_LIB_FOLDER) clean
endef

# Target rules

# Use dependency files automatically generated by GCC.
# First collect all C source files
AUTODEPS := $(patsubst $(SOURCEPREFIX)%.c, $(BUILDPREFIX)%.d, $(SOURCES))

ifeq ($(V),1)
# "V=1" on command line, print commands.
else
# Default, do not print commands.
.SILENT:
endif

.PHONY: all
all: app

app: $(TARGET_APP) $(MESH_LIB)

.PHONY: clean
clean:
	$(call CLEAN)

$(MESH_LIB_FOLDER):
	$(error c-mesh-api library is required and is managed as a git submodule.\
		Please run "git submodule update --init")

.PHONY: $(MESH_LIB)
$(MESH_LIB): $(MESH_LIB_FOLDER)
	make -C $(MESH_LIB_FOLDER)

$(BUILDPREFIX)%.o: $(SOURCEPREFIX)%.c $(MESH_LIB_FOLDER)
	$(call COMPILE,$@,$<)

$(BUILDPREFIX)$(MAIN_APP): $(OBJECTS) $(MESH_LIB)
	$(call LINK,$@,$^)