Create empty file if no FPGA bitstream is provided

diff --git a/build/xlnx_4.9/Makefile b/build/xlnx_4.9/Makefile
index 1aec70161ce656d112af853629656b1d081dac02..a04badb9b5a0d3bf16b48e6deda994595ac287ea 100644 (file)
--- a/build/xlnx_4.9/Makefile
+++ b/build/xlnx_4.9/Makefile
@@ -3,8 +3,13 @@ all: image.ub
 microzed.dtb: microzed.dts linux/source/arch/arm/boot/dts/zynq-7000.dtsi
        dtc -I dts -O dtb -o $@ $<
 
-image.ub: uboot-image.its linux/arch/arm/boot/zImage microzed.dtb ../buildroot/images/rootfs.cpio
+image.ub: uboot-image.its linux/arch/arm/boot/zImage microzed.dtb ../buildroot/images/rootfs.cpio ../../fs-overlay/fpga.bit
        mkimage -f uboot-image.its image.ub
 
 linux/arch/arm/boot/zImage linux/source/arch/arm/boot/dts/zynq-7000.dtsi:
        $(MAKE) -C linux
+
+# Create empty file if no FPGA bitstream is provided
+../../fs-overlay/fpga.bit:
+       mkdir -p $(@D)
+       touch $@