如何编译ARM EABI工具链？(How to compile ARM EABI toolchain?)

如何编译ARM EABI工具链？(How to compile ARM EABI toolchain?)

我要为基于aarch64的设备编译内核

内核源码准备好了。

和内核文档说我应该使用ARM-EABI的arm-eabi-4.9工具链来编译内核。

但它是什么？ 不同类型的GCC编译器还是什么？

是否与GCC 4.9相同？

为什么我想知道这个，因为我想对编译器进行一些修改，那么我如何从源代码为ARM EABI构建arm-eabi-4.9工具链 ？

我在网上做了一些研究，但我发现了gcc 4.9的构建过程和一些关于arm-none-eabi的信息。

我最初在GCC 4.9上做了修改

我可以使用这些来源，然后为arm，aarch64 --->构建GCC 4.9工具链，然后使用此工具链构建内核吗？

i'm going to compile kernel for my aarch64 based device

kernel sources are ready.

and kernel docs are saying that i should use arm-eabi-4.9 toolchain for ARM EABI for compilation kernel.

but what is it? different type of GCC compiler or what?

is it same as GCC 4.9 ?

why i want to know this because i want to make some modifications into compiler so how can i build arm-eabi-4.9 toolchain for ARM EABI from source ?

i have made some research on the net but i found building process of gcc 4.9 and some info about arm-none-eabi..

i have made modifications originally on top of GCC 4.9 this

can i use this sources and then building GCC 4.9 toolchain for arm,aarch64 ---> and then building kernel with using this toolchain ?

最满意答案

在编译gcc时，一些配置标志将其构建为交叉编译器...您只能为一对主机/目标体系结构构建gcc二进制文件。 当主机和目标相同时，您将获得正常的gcc编译器。 如果没有，你会得到一个交叉编译器。

要设置目标，需要在运行./configure时添加--target选项

工具链是架构的gcc交叉编译器+一些基本库（如glibc）。 你也需要建造这些......

工具链名称由arch [-vendor] [-os] - eabi

arm-none-eabi ，是一个用于裸机ARM（无操作系统）的交叉编译器。

arm-linux-gnueabi是ARM二进制文件的交叉编译器，它将使用eabi在ARM Linux操作系统下运行（也可以使用它来构建内核）。

还有那些是arm工具链，你正在寻找aarch64-linux-gnu

考虑寻找一个预构建的工具链（linaro，embedian），需要进行一些微调，所以最好从一个工作二进制文件开始，然后运行gcc -v来展示它是如何构建的。

When compiling gcc, some configuration flags build it as a cross compiler... You can only build gcc binaries for one pair of host/target architectures. When host and target are the same, you get a normal gcc compiler. If not, you get a cross compiler.

To set the target you need to add the --target option when running ./configure

A toolchain is a gcc crosscompilier for an architecture + some basic libraries (like glibc). You'll need to build those too...

toolchain names go by arch [-vendor] [-os] - eabi

arm-none-eabi, is a crosscompiler for baremetal ARM (no OS).

arm-linux-gnueabi is a crosscompiler for ARM binaries that'll run under a and ARM linux OS using eabi ( Use this for building kernels too).

Also those are arm toolchains, you're looking for aarch64-linux-gnu

Consider looking for a prebuilt toolchain (linaro, embedian), there is some fine tuning required, so it's better to start with a working binary, and running gcc -v to show how it was built.