undefined reference to `bsp_printf_full’

c:/efinity/efinity-riscv-ide-2023.2/toolchain/bin/../lib/gcc/riscv-none-embed/8.3.0/../../../../riscv-none-embed/bin/ld.exe: D:\FPGA_Prj\03_Ti60F225_DemoBoard\Prj_demo\02_Ti60F225_SoftDdr3_demo\Ti60F225_DDR3_Example\DDR3_Controller_V17_ti60_soc_v1\par\ddr_demo_ti60\embedded_sw\sapphire_soc\software\standalone\MTest/src/MTest.c:21: undefined reference to `bsp_printf_full’

解决方案：bsp.h里面有个开关，打开printf_full