我要想编译其他处理器的内核怎么办？

lzh_hjzz

大家讨论的都是intel x86的内核，我要想编译其他处理器（比如Motorola的680x0 CPU系列)的内核怎么办?我们下载的内核是不是已经包括了？如何编译？与一般的编译有何不同？请指教！！

jjww

没有接触过别的体系，不过我想还是I386编译流程一样吧。你在Mototrola的CPU上安装Linux成功了，再make menuconfig一样的萨。只不过你参考平台相关性代码部分应该是/usr/src/linux/arch/你的体系目录下。
我们下载的内核包对linux所支持的平台都包括了的。。。。

lzh_hjzz

应该和主机的CPU没关系吧？在intel主机上应该可以编译其他体系的内核啊！

Dragonfly

there are two types of compilation.
1) native compile.we do it all the time. install a linux on x86 pc and compile kernel for x86 pc. install on sparc sun ultra 80 and recompile kernel for ultra sparc
2) cross-compile. u do compile on x86, but use "toolchain" to generate binary code exectuable on other cpu. for example, u can download a m68k-linux-gcc tool chain to compile a kernel for m68k. this is because m68k is so weak that compile a kernel on m68k cpu directly will take u long long time. and even impossible. because some m68k cpu do not have mmu and only 4-8m cpu.

so if u want to have a m68k kernel image,
1) download a good toolchain
2) downlaod linux kernel, and some patches.(linxu kernel do not support all existed cpus because new cpu come so fast, and soem patch code are not stable enough to be included into linux kernel)
3) make menuconfig....


for m68k, u can check uclinux to see if that include u cpu support.

lzh_hjzz

谢谢你！我还要请教一些问题，编译选项Processor type and features只有intel系列的cpu啊，没有别的，是不是默认的，怎么样让其他的类型出来，内核源代码/usr/src/linux/arch/中不是已经包括其他的了吗？？另外编译出的内核是放在哪？应该和intel 的不一样吧？

Dragonfly

when u make ..config. It already decide u ARCH as i386, see Makefile for detail.
u can use "make config ARCH=arm" to see arm cpus. but in fact, u really need a toolchain and possibly some patches to compile a kernel other than x86.
generated kernels are in arch/xxx/boot/  xxx is u arch  name

Dragonfly

this is an embedded related question, so i will move it to that branch.

beyondsakai

不同的平台 是不是要下载不同的内核，整个linux的内核至少有六七十个多M，
但平时用的系统都是只有二十几个M，它的内核应该是根据平台分了类，一个内核并不能支持所有的机器。
不知道是不是这样的。

Dragonfly

no. same kernel, only with some patches.

who said "整个linux的内核至少有六七十个多M，'?

lzh_hjzz

再次感谢Drogonfly斑竹的无私帮助！

Dragonfly

welcome, good luck

KDE

Dragonfly
你怎么用英文？看起来太费眼了！

Dragonfly

i do not install chinese input. and i think use english is better here, in my univ.

jmcar

又多了个嵌入式的朋友

Dragonfly

the more, the better