add version to make output

tmk_core/rules.mk

@@ -237,6 +237,10 @@ sizeafter: $(BUILD_DIR)/$(TARGET).hex
 	# test file sizes eventually
 	# @if [[ $($(SIZE) --target=$(FORMAT) $(TARGET).hex | $(AWK) 'NR==2 {print "0x"$5}') -gt 0x200 ]]; then $(SECHO) "File is too big!"; fi
 
+# Display qmk version information.
+qmkversion :
+	@$(SILENT) || printf "QMK Firmware v$(shell git describe --abbrev=0 --tags 2>/dev/null)\n\n"
+
 # Display compiler version information.
 gccversion :
 	@$(SILENT) || $(CC) --version
@@ -275,7 +279,7 @@ gccversion :
 	$(eval CMD=$(BIN) $< $@ || exit 0)
 	@$(BUILD_CMD)
 
-BEGIN = gccversion sizebefore
+BEGIN = qmkversion gccversion sizebefore
 
 # Link: create ELF output file from object files.
 .SECONDARY : $(BUILD_DIR)/$(TARGET).elf
@@ -382,7 +386,7 @@ $(eval $(foreach OUTPUT,$(OUTPUTS),$(shell mkdir -p $(OUTPUT) 2>/dev/null)))
 
 
 # Listing of phony targets.
-.PHONY : all finish sizebefore sizeafter gccversion \
-build elf hex eep lss sym coff extcoff \
+.PHONY : all finish sizebefore sizeafter qmkversion \
+gccversion build elf hex eep lss sym coff extcoff \
 clean clean_list debug gdb-config show_path \
 program teensy dfu flip dfu-ee flip-ee dfu-start