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- // -*- mode:doc; -*-
- // vim: set syntax=asciidoc:
- [[toolchain]]
- Cross-compilation toolchain
- ---------------------------
- A compilation toolchain is the set of tools that allows you to compile
- code for your system. It consists of a compiler,
- binary utils like assembler and linker and a
- C standard library.
- The system installed on your development station certainly already has
- a compilation toolchain that you can use to compile an application
- that runs on your system. If you're using a PC, your compilation
- toolchain runs on an x86 processor and generates code for an x86
- processor. Under most Linux systems, the compilation toolchain uses
- the GNU libc (glibc) as the C standard library. This compilation
- toolchain is called the "host compilation toolchain". The machine on
- which it is running, and on which you're working, is called the "host
- system" footnote:[This terminology differs from what is used by GNU
- configure, where the host is the machine on which the application will
- run (which is usually the same as target)].
- The compilation toolchain is provided by your distribution, and
- OpenADK has nothing to do with it (other than using it to build a
- cross-compilation toolchain and other tools that are run on the
- development host).
- As said above, the compilation toolchain that comes with your system
- runs on and generates code for the processor in your host system. As
- your embedded system has a different processor, you need a
- cross-compilation toolchain - a compilation toolchain that runs on
- your _host system_ but generates code for your _target system_ (and
- target processor). For example, if your host system uses x86 and your
- target system uses ARM, the regular compilation toolchain on your host
- runs on x86 and generates code for x86, while the cross-compilation
- toolchain runs on x86 and generates code for ARM.
- You can choose between four C libraries:
- http://www.uclibc-ng.org[uClibc-ng],
- http://www.uclibc.org[uClibc],
- http://www.gnu.org/software/libc/libc.html[glibc] and
- http://www.musl-libc.org[musl].
- There are some configuration options provided in +Toolchain settings+.
- You can enable or disable the building of following components and toolchain
- options:
- * Optimization level
- * Stack Smashing Protection (SSP) support
- * Position Independent Executable (PIE) support
- * Link Time Optimization (LTO) support
- * GNU Hashstyle support
- * GOLD LD support
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