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eCos是可配置嵌入式操作系统，比Linux稍小，又很好地支持Linux的系统调用接口。其源代码大多是用C++编写。
进入到eCos的官网下载页面：http://ecos.sourceware.org/getstart.html
新建一个目录并进入。
$ mkdir -p Workspace/ecos $ cd Workspace/ecos
安网页上的指引，执行wget命令
$ wget --passive-ftp ftp://ecos.sourceware.org/pub/ecos/ecos-install.tcl
运行 sh ecos-install.tcl
$ sh ecos-install.tcl eCos installer v2.0.1 starting... Written and maintained by Jonathan Larmour <jifl@eCosCentric.com> Retrieving installer metadata information... Connected... Downloading ecos-install.db... File size 6572 bytes [**************************************************] --------------------------------------------------------- Available distribution sites: [1] ftp://mirrors.kernel.org/sources.redhat.com/ecos [2] http://mirrors.kernel.org/sources.redhat.com/ecos [3] ftp://mirror.aarnet.edu.au/pub/sourceware/ecos [4] http://mirror.aarnet.edu.au/pub/sourceware/ecos [5] ftp://ftp.mirrorservice.org/sites/sources.redhat.com/pub/ecos [6] http://www.mirrorservice.org/sites/sources.redhat.com/pub/ecos [7] ftp://gd.tuwien.ac.at/opsys/ecos [8] http://gd.tuwien.ac.at/opsys/ecos [9] ftp://ftp.funet.fi/pub/mirrors/sources.redhat.com/pub/ecos [10] ftp://ftp.gwdg.de/pub/misc/sources.redhat.com/ecos [11] http://ftp.gwdg.de/pub/misc/sources.redhat.com/ecos [12] ftp://ftp-stud.fht-esslingen.de/pub/Mirrors/sources.redhat.com/ecos [13] http://ftp-stud.fht-esslingen.de/pub/Mirrors/sources.redhat.com/ecos [14] ftp://bo.mirror.garr.it/mirrors/sourceware.org/ecos [15] http://bo.mirror.garr.it/mirrors/sourceware.org/ecos [16] ftp://ftp.u-aizu.ac.jp/pub/gnu/cygnus/ecos [17] ftp://ftp.sun.ac.za/pub/mirrorsites/sourceware.org/pub/ecos [18] http://ftp.sun.ac.za/ftp/pub/mirrorsites/sourceware.org/pub/ecos [19] ftp://ftp.twaren.net/Unix/sourceware.org/ecos [20] http://ftp.twaren.net/Unix/sourceware.org/ecos [21] http://mirror.facebook.net/sourceware/ecos [22] ftp://ecos.sourceware.org/pub/ecos Please select a distribution site: 20
列举了22个下载源，让我们选一个。我选的是20，选有些源下载不了，要设置代理才行。
--------------------------------------------------------- Please select a directory for installation [Default /home/hevake_lcj/ecos]:
然后就是让我们指定安排路径，默认就是相前目录。
---------------------------------------------------------
Available prebuilt GNU tools:
[1] arm-eabi
[2] arm-elf (old)
[3] i386-elf
[4] m68k-elf
[5] mipsisa32-elf
[6] powerpc-eabi
[7] sh-elf
[q] Finish selecting GNU tools
("*" indicates tools already selected)
Please select GNU tools to download and install: 1
这是让我们选择哪种平台。我选的是1，arm-eabi。还可以多选几个，选q结束选择。
然后就开始下载了：
Entering /home/hevake_lcj/ecos Retrieving GNU tools for arm-eabi Connected... Downloading ecos-gnutools-arm-eabi-20120623.i386linux.tar.bz2... File size 27341525 bytes [******* ]
这个过程时间比较长，慢慢等。
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原文地址：http://my.oschina.net/hevakelcj/blog/409005
