GCC, the GNU Compiler Collection - GNU 编译器套件

The GNU Compiler Collection includes front ends for C, C++, Objective-C, Fortran, Ada, Go, and D, as well as libraries for these languages (libstdc++,…). GCC was originally written as the compiler for the GNU operating system. The GNU system was developed to be 100% free software, free in the sense that it respects the user’s freedom.
GNU 编译器套件 (GNU Compiler Collection) 包括 C、C++、Objective-C、Fortran、Java、Ada、Go 和 D 语言的前端，也包括了这些语言的库 (libstdc++, …)。GCC 的初衷是为 GNU 操作系统专门编写的一款编译器。GNU 系统是彻底的*软件。此处，*的含义是它尊重用户的*。

We strive to provide regular, high quality releases, which we want to work well on a variety of native and cross targets (including GNU/Linux), and encourage everyone to contribute changes or help testing GCC. Our sources are readily and freely available via SVN and weekly snapshots.

Major decisions about GCC are made by the steering committee, guided by the mission statement.

in the sense：就...意义而言
freedom ['friːdəm]：n. *，自主，直率
strive [straɪv]：vi. 努力，奋斗，抗争
encourage [ɪn'kʌrɪdʒ; en-]：vt. 鼓励，怂恿，激励，支持
snapshot ['snæpʃɒt]：n. 快照，快相，急射，速射，简单印象 vt. 给…拍快照 vi. 拍快照
committee [kə'mɪtɪ]：n. 委员会
steer [stɪə]：vt. 控制，引导，驾驶 vi. 驾驶，掌舵，行驶 n. 阉牛
mission ['mɪʃ(ə)n]：n. 使命，任务，代表团，布道 vt. 派遣，向...传教
statement ['steɪtm(ə)nt]：n. 声明，陈述，叙述，报表，清单

Apache Subversion (SVN, after its command name svn) is a software versioning and revision control system distributed as open source under the Apache License.

The Concurrent Versions System (CVS), also known as the Concurrent Versioning System, is a free client-server revision control system in the field of software development.

References

GCC 5 Release Series
https://gcc.gnu.org/gcc-5/

5.5 manuals
https://gcc.gnu.org/onlinedocs/5.5.0/

GCC 5.5 Manual (also in PDF or PostScript or an HTML tarball)
Using the GNU Compiler Collection - For GCC version 5.5.0

postscript ['pəʊs(t)skrɪpt]：n. 附言，又及