Makedefs

# The default application name.
ifndef APPL
    APPL=my_app
endif

# The default build path.
ifndef BPATH
    BPATH=build
endif

# The compiler.
ifndef CROSSCC
    CROSSCC=gcc
endif

# The linker.
ifndef CROSSLD
    CROSSLD=gcc
endif

# The flags which are passed to the compiler and the linker.
CCFLAGS+=-std=gnu99 -Wall -pthread -lwiringPi -pedantic -c ${patsubst %,-I%,${subst :, ,${IPATH}}}
LDFLAGS+=-std=gnu99 -Wall -pthread -lpthread -lwiringPi -pedantic

# The default rules, i.e. the entry point.
all: ${BPATH}
all: ${BPATH}/${APPL}.run

# The target to clean the build directory.
clean:
	@echo "cleaning up path '${BPATH}' ..."
	@rm -rf ${BPATH}

# The rule for creating the build directory.
${BPATH}:
	@echo "creating path '${BPATH}' ..."
	@mkdir ${BPATH}

# The rule for building an object file from the corresponding C source file.
${BPATH}/%.o: %.c
	@echo "compiling file '${<}' ..."
	@${CROSSCC} ${CCFLAGS} -o ${@} ${<}

# The rule for linking an application.
${BPATH}/%.run:
	@echo "linking application '${@}' ..."
	@${CROSSLD} ${LDFLAGS} -o ${@} $(filter %.o %.a, ${^})