Makefile for bladeRF-versions, with cross-compiling options (via a Yocto build)

bladeRF-versions.mk

# 
# Simple cross-compilation example for Yocto-based toolchains and bladeRF
#
# Host build:
# 	make 
# 	
# Wandboard Quad build:
#	PLATFORM=wandboard-quad YOCTO_BUILD_DIR=path/to/build/dir make
#
# Raspberry Pi 2 build:
#	PLATFORM=raspberrypi2 YOCTO_BUILD_DIR=path/to/build/dir make
#
################################################################################

CFLAGS := -Wall -Wextra -Wno-unused-parameter
LDFLAGS := -lbladeRF

ifdef (DEBUG)
	CFLAGS += -O0 -ggdb3
else
	CFLAGS += -O2
endif

# Default to wandboard-quad. Specify PLATFORM= on the command-line to override
PLATFORM ?= wandboard-quad

ifdef YOCTO_BUILD_DIR
	CROSS_COMPILE := $(YOCTO_BUILD_DIR)/tmp/sysroots/x86_64-linux/usr/bin/arm-poky-linux-gnueabi/arm-poky-linux-gnueabi-
	CC := $(CROSS_COMPILE)gcc
	LD := $(CROSS_COMPILE)ld
	AR := $(CROSS_COMPILE)AR

	ifeq ($(PLATFORM), raspberrypi2)
		WORK_ARCH_DIR := cortexa7hf-vfp-vfpv4-neon-poky-linux-gnueabi
		CFLAGS += -march=armv7-a -marm -mthumb-interwork -mfloat-abi=hard -mfpu=neon-vfpv4 -mtune=cortex-a7
	endif
	
	ifeq ($(PLATFORM), wandboard-quad)
		WORK_ARCH_DIR := cortexa9hf-vfp-neon-poky-linux-gnueabi
		CFLAGS += -march=armv7-a -marm -mthumb-interwork -mfloat-abi=hard -mfpu=neon -mtune=cortex-a9
	endif

	CFLAGS += --sysroot=$(YOCTO_BUILD_DIR)/tmp/sysroots/$(PLATFORM)

	CROSS_BLADERF_WORK_DIR := $(YOCTO_BUILD_DIR)/tmp/work/$(WORK_ARCH_DIR)/libbladerf/1.2.1-r0/git/
	CROSS_BLADERF_BUILD_DIR := $(CROSS_BLADERF_WORK_DIR)/build/host/output/
	CROSS_BLADERF_INC_DIR := $(CROSS_BLADERF_WORK_DIR)/host/libraries/libbladeRF/include


	LDFLAGS += -L$(CROSS_BLADERF_BUILD_DIR)
	INCLUDES += $(SYSROOT_INCLUDES) -I$(CROSS_BLADERF_INC_DIR)
endif

all: bladeRF-versions

bladeRF-versions: bladeRF-versions.c
	$(CC) $(CFLAGS) $(INCLUDES) $^ $(LDFLAGS) -o $@

clean: 
	rm -f bladeRF-versions

.PHONY: clean