1、GCC选项添加
COMPILE_FLAGS += -ffunction-sections -fdata-sections
2、LD选项添加
LDFLAGS += -Wl,-gc-sections
例子：
gcc *.c -O3 -o test -I ../../include/ -ffunction-sections -fdata-sections -Wl,-gc-sections -DWITH_NOIDREF -Wl,-print-gc-sections
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