linux2.6.21 make zImage时出现的错误(1)

1.invalid option `abi=aapcs-linux'选项错误
scripts/kconfig/conf -s arch/arm/Kconfig
CHK include/linux/version.h
SYMLINK include/asm-arm/arch -> include/asm-arm/arch-s3c2410
make[1]: `include/asm-arm/mach-types.h' is up to date.
CHK include/linux/utsrelease.h
CC arch/arm/kernel/asm-offsets.s
cc1: error: invalid option `abi=aapcs-linux'
make[1]: *** [arch/arm/kernel/asm-offsets.s] Error 1
make: *** [prepare0] Error 2

解决的方法
You're building an EABI kernel with an OABI compiler. You can either turn off the EABI option in your config file (Kernel Features->Use EABI),or, you can use an EABI toolchain such as the ARM/GNU Linux one from <http://www.codesourcery.com/gnu_toolchains/arm/download.html>.I recommend the latter, because then you can run Arjan's new images.
上述的关掉EABI选项可以通过测试

2.`rtc_lock'未定义错误（未完全解决）
drivers/built-in.o(.text+0x281e4):drivers/char/nvram.c:350: more undefined references to `rtc_lock' follow
查找drivers/char/nvram.c有关的rtc_lock定义，发现2.6.21与以往的kernel不同，于是在包含文件中查找，在include/linux/mc146818rtc.h中发现了rtc_lock的定义，但是有一个__KERNEL__的条件编译选项，去掉这个条件编译选项，再make zImage，但是问题好像依然存在，继续在drivers/char/nvram.c中增加这个定义spinlock_t rtc_lock;再编译，发现编译通过。

3.make zImage和make xipImage
Kernel configured for XIP (CONFIG_XIP_KERNEL=y)
Only the xipImage target is available in this case
make[1]: *** [arch/arm/boot/zImage] Error 1
make: *** [zImage] Error 2
好象是make menuconfig的时候Boot options--->Kernel Execte-In-Place from ROM选项问题，去掉这个选项编译通过（如果是make xopImage时則需要将这个选项选上），最终成功编译了make zImage。