AMD64位系统如何优化编译glibc？

echo

我想让我的glibc速度更快一些，更精简一些。我需要使用哪些参数？

d00m3d

Don't do that！

newper

刚把glibc升级成2.10.1，参考了Fedora的spec

glibc2.10的一些更新：

* New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
  Implemented by Ulrich Drepper.

* New Linux interfaces: accept4, fallocate, fallocate64.
  Implemented by Ulrich Drepper.

* Correct declarations of string function when used in C++ code.  This
  could lead to compile errors for invalid C++ code.

* XPG7/POSIX 2008 compilation environment.  Many GNU-specific functions
  are now in POSIX.

* New POSIX 2008 interface: psiginfo
  Implemented by Ulrich Drepper.

* New ISO C++1x interfaces: quick_exit, at_quick_exit
  Implemented by Ulrich Drepper.

* Support for selecting between multiple function definitions at runtime
  using STT_GNU_IFUNC symbols.  Implemented by Ulrich Drepper.

* The libcrypt library can now use the hash function implementations in
  NSS.  Implemented by Ulrich Drepper.

* The malloc implementation can be compiled to be less memory efficient
  but higher performing in multi-threaded programs.
  Implemented by Ulrich Drepper.

* New locales: nan_TW@latin, ks_IN

* Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for
  x86-64.  Implemented by Ulrich Drepper.

* Extended printf hook support.  It is possible to use user-defined
  types and extend existing format specifiers.
  Implemented by Ulrich Drepper.

* Handling for group shadow files has been added.
  Implemented by Ulrich Drepper.

聚焦深空

楼上，cvs 发布的 glibc 那来的 2.10.1，稍稍让人满意些的是准备切换到 git 发布。

另，eglibc 已进入 debian sid，您不妨直接上 eglibc-2.10 替换 glibc-2.10，看看效果如何。
http://www.eglibc.org/
http://www.eglibc.org/repository
http://www.eglibc.org/faq

newper

cvs上的确有2.10.1，不过我是从git下的

d00m3d

Post by echo;1987513
我想让我的glibc速度更快一些，更精简一些。我需要使用哪些参数？

今天看见 SVN book 的 changelog 连同相关的 bug report，说维护者他们看了 Fedora 及 DIY Linux 都为 glibc 优化，於是随之加入了 -O3 及 -pipe 参数，并说为优化的警告经已过时

详见：

http://www.linuxfromscratch.org/ ... er01/changelog.html

http://wiki.linuxfromscratch.org/lfs/ticket/2299

Description

Looking at both Fedora's RPM spec file and DIY-Linux, they both seem to optimize Glibc.

Mabe we could do that for 7.0, and that warning about optmization is obslete.

一反以往常态，晕死！ :yun: