s3c6410裸机实验-错误汇总

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错误一

<span style="font-family:SimSun;">main.o:(.ARnostdlibM.exidx+0x0): undefined reference to `__aeabi_unwind_cpp_pr1'mmu.o:(.ARM.exidx+0x0): undefined reference to `__aeabi_unwind_cpp_pr0'mmu.o:(.ARM.exidx+0x10): undefined reference to `__aeabi_unwind_cpp_pr1'leds.o:(.ARM.exidx+0x0): undefined reference to `__aeabi_unwind_cpp_pr0'button.o:(.ARM.exidx+0x0): undefined reference to `__aeabi_unwind_cpp_pr0'interrupt.o:(.ARM.exidx+0x0): undefined reference to `__aeabi_unwind_cpp_pr1'interrupt.o:(.ARM.exidx+0x10): undefined reference to `__aeabi_unwind_cpp_pr0'nand.o:(.ARM.exidx+0x0): undefined reference to `__aeabi_unwind_cpp_pr0'nand.o:(.ARM.exidx+0x28): undefined reference to `__aeabi_unwind_cpp_pr1'uart.o:(.ARM.exidx+0x0): undefined reference to `__aeabi_unwind_cpp_pr0'uart.o:(.ARM.exidx+0x10): undefined reference to `__aeabi_unwind_cpp_pr1'lib/lib.o:(.ARM.exidx+0x0): undefined reference to `__aeabi_unwind_cpp_pr1'lib/lib.o:(.ARM.exidx+0x8): undefined reference to `__aeabi_unwind_cpp_pr1'lib/lib.o:(.ARM.exidx+0x10): undefined reference to `__aeabi_unwind_cpp_pr0'lib/lib.o:(.ARM.exidx+0x18): undefined reference to `__aeabi_unwind_cpp_pr1'lib/lib.o:(.ARM.exidx+0xd0): undefined reference to `__aeabi_unwind_cpp_pr0'lib/lib.o:(.ARM.exidx+0xd8): undefined reference to `__aeabi_unwind_cpp_pr1</span>

解决方法：在 arm-linux-gcc 后加入-nostdlib选项

-nostdlib
不连接系统标准启动文件和标准库文件，只把指定的文件传递给连接器。这个选项常用于编译内核、bootloader等程序，它们不需要启动文件、标准库文件。

错误二

<span style="font-family:SimSun;">main.c:23: warning: incompatible implicit declaration of built-in function 'printf'uart.c:20: warning: conflicting types for built-in function 'putchar'make[1]: Entering directory `/home/edward/ok6410/uboot/lib'printf.c: In function 'printf':printf.c:14: warning: incompatible implicit declaration of built-in function 'strlen'</span>

解决方法：在arm-linux-gcc 后加-fno-builtin选项
出现这个问题的原因是自己实现的函数名字与内联的函数名相冲突

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