什么是工具链？

waterloo2005

看gcc的升级文档中提到工具链。
什么是工具链？ 谢谢

d00m3d

建构系统的最主要工具组合，Linux 下一般是指 binutils/glibc/gcc

acevery

具体什么包，你emerge -vp system看看就知道了

zhllg

不过，一般所说的工具链确实仅是指binutils/gcc/glibc而已

LiYanrui

The following text comes "Linux Sea" book,

These additional tools and libraries are of course written by programmers and they must be able to build their code so that it works on your system. Some systems, like Gentoo Linux, even build this software for you instead of relying on the prebuilt software by others. To be able to build these tools, you need the source code of each tool and the necessary tools to convert the source code to executable files.

These tools are called a toolchain: a set of tools that are used as in a chain in order to produce a working application. A general toolchain consists out of a text editor (to write the code in), compiler (to convert code to machine-specific language), linker (to combine machine-code of several sources - including prebuilt "shared" libraries - into a single, executable file) and libraries (those I just mentioned as being "shared" libraries).

fender010

wiki一下。

axlrose

可以参考一下crossdev , 只输出帮助看一下就行了
生成交叉工具链

2. $ sudo crossdev arm --help
3. Usage: crossdev [options] --target TARGET         
5. Options:
6.     --b, --binutils ver   Specify version of binutils to use
7.     --g, --gcc ver        Specify version of gcc to use     
8.     --k, --kernel ver     Specify version of kernel headers to use
9.     --l, --libc ver       Specify version of libc to use         
10.     -S, --stable          Use latest stable versions as default   
11.     -C, --clean target    Uninstall specified target              
12.     -P, --portage opts    Options to pass to emerge (see emerge(1))
13.     --with[out]-headers   Build C library headers before C compiler?
14. Stage Options:                                                      
15.     -s0, --stage0         Build just binutils                       
16.     -s1, --stage1         Also build a C compiler (no libc/C++)     
17.     -s2, --stage2         Also build kernel headers                 
18.     -s3, --stage3         Also build the C library (no C++)         
19.     -s4, --stage4         Also build a C++ compiler [default]      
20. Extra Fun (must be run after above stages):                        
21.     --ex-only             Skip the stage steps above               
22.     --ex-gcc              Build extra gcc targets (gcj/ada/etc...)  
23.     --ex-gdb              Build a cross gdb
24.     --ex-insight          Build a cross insight
25. Target (-t) takes a tuple ARCH-VENDOR-OS-LIBC; see 'crossdev -t help'
28. $ sudo crossdev -t help
29. Supported Architectures:
30.    - alpha                                     - arm / armeb
31.    - hppa (parisc)                             - ia64
32.    - i386 / i486 / i586 / i686 (x86)           - m68k
33.    - mips / mipsel / mips64 / mips64el
34.    - powerpc (ppc) / powerpc64 (ppc64)
35.    - sparc / sparc64                           - s390 / s390x
36.    - sh / sh[1-5] / sh64                       - x86_64 (amd64)
37. Supported C Libraries:
38.    - glibc (gnu)
39.    - klibc       [prob wont work]
40.    - newlib      [bare metal/no operating system]
41.    - uclibc      [not all arches are ported]
42. Special Targets:
43.    - avr      http://www.nongnu.org/avr-libc/
44.    - bfin     http://blackfin.uclinux.org/
45.    - h8300    http://h8300-hms.sourceforge.net/
46.    - mingw32  http://www.mingw.org/
47.    - msp430   http://mspgcc.sourceforge.net/
48.    - nios2    http://www.altera.com/products/ip/processors/nios2/ni2-index.html
49.    - xc16x    http://www.infineon.com/
50.    - ee / iop / dvp (ps2) [Playstation 2 targets]
51.    - ppu / spu (cell) [Cell/Playstation 3 targets]
52. Softfloat toolchains:
53.    Include 'softfloat' in the 'vendor' field
54.    e.g. armeb-softfloat-linux-uclibc  powerpc-booya_softfloat-linux-gnu

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