SDK编译时报错，如何解决？
时间：10-02
整理：3721RD
点击：
'Building target: CPU3.elf'
'Invoking: MicroBlaze gcc linker'
mb-gcc -Wl,-T -Wl,../src/lscript.ld -L../../CPU3_bsp/microblaze_3/lib -mxl-barrel-shift -mxl-pattern-compare -mcpu=v8.50.c -mno-xl-soft-mul -Wl,--no-relax -Wl,--gc-sections -o "CPU3.elf" ./src/main.o -Wl,--start-group,-lxil,-lgcc,-lc,--end-group
../../CPU3_bsp/microblaze_3/lib\libxil.a(xil_printf.o): In function `padding':
/wrk/ptx/users/nagaraju/GCC_2013_03/newlib/libgloss/microblaze/xil_printf.c:50: undefined reference to `outbyte'
../../CPU3_bsp/microblaze_3/lib\libxil.a(xil_printf.o): In function `outnum':
/wrk/ptx/users/nagaraju/GCC_2013_03/newlib/libgloss/microblaze/xil_printf.c:112: undefined reference to `outbyte'
../../CPU3_bsp/microblaze_3/lib\libxil.a(xil_printf.o): In function `xil_printf':
/wrk/ptx/users/nagaraju/GCC_2013_03/newlib/libgloss/microblaze/xil_printf.c:168: undefined reference to `outbyte'
../../CPU3_bsp/microblaze_3/lib\libxil.a(xil_printf.o): In function `outs':
/wrk/ptx/users/nagaraju/GCC_2013_03/newlib/libgloss/microblaze/xil_printf.c:66: undefined reference to `outbyte'
../../CPU3_bsp/microblaze_3/lib\libxil.a(xil_printf.o): In function `xil_printf':
/wrk/ptx/users/nagaraju/GCC_2013_03/newlib/libgloss/microblaze/xil_printf.c:229: undefined reference to `outbyte'
../../CPU3_bsp/microblaze_3/lib\libxil.a(xil_printf.o):/wrk/ptx/users/nagaraju/GCC_2013_03/newlib/libgloss/microblaze/xil_printf.c:238: more undefined references to `outbyte' follow
collect2: ld returned 1 exit status
'Invoking: MicroBlaze gcc linker'
mb-gcc -Wl,-T -Wl,../src/lscript.ld -L../../CPU3_bsp/microblaze_3/lib -mxl-barrel-shift -mxl-pattern-compare -mcpu=v8.50.c -mno-xl-soft-mul -Wl,--no-relax -Wl,--gc-sections -o "CPU3.elf" ./src/main.o -Wl,--start-group,-lxil,-lgcc,-lc,--end-group
../../CPU3_bsp/microblaze_3/lib\libxil.a(xil_printf.o): In function `padding':
/wrk/ptx/users/nagaraju/GCC_2013_03/newlib/libgloss/microblaze/xil_printf.c:50: undefined reference to `outbyte'
../../CPU3_bsp/microblaze_3/lib\libxil.a(xil_printf.o): In function `outnum':
/wrk/ptx/users/nagaraju/GCC_2013_03/newlib/libgloss/microblaze/xil_printf.c:112: undefined reference to `outbyte'
../../CPU3_bsp/microblaze_3/lib\libxil.a(xil_printf.o): In function `xil_printf':
/wrk/ptx/users/nagaraju/GCC_2013_03/newlib/libgloss/microblaze/xil_printf.c:168: undefined reference to `outbyte'
../../CPU3_bsp/microblaze_3/lib\libxil.a(xil_printf.o): In function `outs':
/wrk/ptx/users/nagaraju/GCC_2013_03/newlib/libgloss/microblaze/xil_printf.c:66: undefined reference to `outbyte'
../../CPU3_bsp/microblaze_3/lib\libxil.a(xil_printf.o): In function `xil_printf':
/wrk/ptx/users/nagaraju/GCC_2013_03/newlib/libgloss/microblaze/xil_printf.c:229: undefined reference to `outbyte'
../../CPU3_bsp/microblaze_3/lib\libxil.a(xil_printf.o):/wrk/ptx/users/nagaraju/GCC_2013_03/newlib/libgloss/microblaze/xil_printf.c:238: more undefined references to `outbyte' follow
collect2: ld returned 1 exit status
ugghhhjkhjh
有没有人清楚呢?
是不是BSP里面没有设置stdout/stdin
楼上正解，系统没包含uart之类标准输入输出，或是bsp中未指定