Break out flag variables into multiple lines

Makefile

@@ -5,13 +5,22 @@ CURL_FLAGS := -O -\# --fail --location --tlsv1.3 --proto =https --max-time 300
 TARGET = blink
 TARGET_MCU?=CH32V003
 NEWLIB=/usr/arm-none-eabi/include
-CFLAGS=-g -Os -flto -ffunction-sections -fdata-sections -fmessage-length=0 -msmall-data-limit=8
-LDFLAGS+=-Wl,--print-memory-usage -Wl,-Map=$(TARGET).map,--build-id=none
 TOOL_PREFIX := riscv64-linux-gnu
 CC := $(TOOL_PREFIX)-gcc
 OBJDUMP := $(TOOL_PREFIX)-objdump
 OBJCOPY := $(TOOL_PREFIX)-objcopy
 
+CFLAGS = -g \
+		 -Os \
+		 -flto \
+		 -ffunction-sections \
+		 -fdata-sections \
+		 -fmessage-length=0 \
+		 -msmall-data-limit=8
+
+LDFLAGS = -Wl,--print-memory-usage \
+		  -Wl,-Map=$(TARGET).map,--build-id=none
+
 EXTFLAGS := -march=rv32ec \
 			-mabi=ilp32e \
 			-DCH32V003=1 \