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<?xml version="1.0" encoding="gb2312"?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312"/><title>linux for ppc 12                       jacobw </title></head><body><center><h1>BBS 水木清华站∶精华区</h1></center><a name="top"></a>发信人:&nbsp;plato&nbsp;(纯真年代),&nbsp;信区:&nbsp;Embedded&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />标&nbsp;&nbsp;题:&nbsp;linux&nbsp;for&nbsp;ppc&nbsp;12&nbsp;<br />发信站:&nbsp;BBS&nbsp;水木清华站&nbsp;(Wed&nbsp;May&nbsp;30&nbsp;23:18:13&nbsp;2001)&nbsp;<br />&nbsp;<br />Next&nbsp;Previous&nbsp;Contents&nbsp;<br />----------------------------------------------------------------------------&nbsp;<br />----&nbsp;<br />12.&nbsp;Runtime&nbsp;Library&nbsp;<br />12.1&nbsp;glibc&nbsp;<br /><a href="http://www.gnu.org/software/libc/">http://www.gnu.org/software/libc/</a>&nbsp;and&nbsp;<a href="http://sources.redhat.com/glibc/">http://sources.redhat.com/glibc/</a>&nbsp;<br />Modern&nbsp;releases&nbsp;of&nbsp;glibc&nbsp;are&nbsp;very&nbsp;large&nbsp;for&nbsp;a&nbsp;traditional&nbsp;embedded&nbsp;system.&nbsp;I&nbsp;<br />f&nbsp;your&nbsp;application&nbsp;requires&nbsp;only&nbsp;one&nbsp;or&nbsp;two&nbsp;user&nbsp;programs,&nbsp;you&nbsp;can&nbsp;staticall&nbsp;<br />y&nbsp;link&nbsp;them&nbsp;to&nbsp;avoid&nbsp;requiring&nbsp;the&nbsp;entire&nbsp;dynamic&nbsp;library.&nbsp;Another&nbsp;option&nbsp;is&nbsp;<br />&nbsp;to&nbsp;hand-strip&nbsp;the&nbsp;dynamic&nbsp;library&nbsp;to&nbsp;a&nbsp;bare&nbsp;minimum.&nbsp;<br />The&nbsp;are&nbsp;some&nbsp;modifications&nbsp;required&nbsp;to&nbsp;official&nbsp;glibc-2.1.x&nbsp;releases&nbsp;to&nbsp;make&nbsp;<br />&nbsp;them&nbsp;work&nbsp;in&nbsp;the&nbsp;embedded&nbsp;PowerPC&nbsp;environment,&nbsp;such&nbsp;as&nbsp;cache&nbsp;line&nbsp;size&nbsp;mods&nbsp;<br />.&nbsp;See:&nbsp;<a href="http://lists.linuxppc.org/listarcs/linuxppc-embedded/199909/msg00000.">http://lists.linuxppc.org/listarcs/linuxppc-embedded/199909/msg00000.</a>&nbsp;<br />html&nbsp;<br />After&nbsp;applying&nbsp;these&nbsp;mods,&nbsp;glibc-2.1.x&nbsp;can&nbsp;be&nbsp;configured&nbsp;for&nbsp;cross-compiling&nbsp;<br />&nbsp;with:&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;#!/bin/sh&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;export&nbsp;PATH=/path/to/local/i686-pc-linux-gnu/bin:$PATH&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;export&nbsp;CFLAGS=&quot;-msoft-float&nbsp;-O2&nbsp;-DNDEBUG=1&quot;&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;export&nbsp;CC=powerpc-linux-gcc&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;export&nbsp;AR=powerpc-linux-ar&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;export&nbsp;RANLIB=powerpc-linux-ranlib&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;configure&nbsp;--host=powerpc-linux&nbsp;--prefix=/path/to/local/powerpc-linux&nbsp;\&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;--with-headers=/path/to/linux-2.2.13/include&nbsp;--enable-add-ons=linuxthrea&nbsp;<br />ds&nbsp;\&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;--with-gnu-as&nbsp;--with-gnu-ld&nbsp;--disable-sanity-checks&nbsp;--without-fp&nbsp;<br />There&nbsp;is&nbsp;a&nbsp;magic&nbsp;script&nbsp;named&nbsp;mklibs.sh&nbsp;which&nbsp;removes&nbsp;unused&nbsp;functions&nbsp;from&nbsp;&nbsp;<br />the&nbsp;shared&nbsp;C&nbsp;library&nbsp;in&nbsp;the&nbsp;Debian&nbsp;Boot&nbsp;Floppies&nbsp;package,&nbsp;at:&nbsp;<a href="ftp://ftp.us.d">ftp://ftp.us.d</a>&nbsp;<br />ebian.org/debian/dists/potato/main/source/admin/boot-floppies_2.2.16.tar.gz&nbsp;<br />12.2&nbsp;sglibc&nbsp;<br /><a href="http://sourceforge.net/projects/sglibc">http://sourceforge.net/projects/sglibc</a>&nbsp;and&nbsp;<a href="http://external-lists.varesearch.">http://external-lists.varesearch.</a>&nbsp;<br />com/lists/listinfo/sglibc&nbsp;<br />This&nbsp;is&nbsp;an&nbsp;attempt&nbsp;to&nbsp;produce&nbsp;a&nbsp;small&nbsp;glibc-compatible&nbsp;C&nbsp;runtime&nbsp;library&nbsp;sub&nbsp;<br />set&nbsp;suitable&nbsp;for&nbsp;embedded&nbsp;systems.&nbsp;<br />To&nbsp;cut&nbsp;down&nbsp;some&nbsp;of&nbsp;the&nbsp;bloat&nbsp;in&nbsp;glibc,&nbsp;apply&nbsp;the&nbsp;patches&nbsp;at:&nbsp;<a href="http://externa">http://externa</a>&nbsp;<br />l-lists.varesearch.com/archives/sglibc/1999-September/000007.html&nbsp;<a href="ftp://ftp.">ftp://ftp.</a>&nbsp;<br />valinux.com/pub/support/hjl/glibc/glibc-old_version.tar.gz&nbsp;<br />12.3&nbsp;uClibc&nbsp;<br /><a href="http://opensource.lineo.com/cgi-bin/cvsweb/uClibc/">http://opensource.lineo.com/cgi-bin/cvsweb/uClibc/</a>&nbsp;<br />uC-Libc&nbsp;is&nbsp;a&nbsp;C&nbsp;library&nbsp;for&nbsp;embedded&nbsp;systems&nbsp;developed&nbsp;originally&nbsp;for&nbsp;uClinux&nbsp;<br />,&nbsp;and&nbsp;now&nbsp;being&nbsp;ported&nbsp;to&nbsp;other&nbsp;architectures&nbsp;including&nbsp;PowerPC.&nbsp;It&nbsp;has&nbsp;a&nbsp;di&nbsp;<br />fferent&nbsp;set&nbsp;of&nbsp;design&nbsp;goals&nbsp;from&nbsp;GNU&nbsp;libc,&nbsp;but&nbsp;for&nbsp;many&nbsp;embedded&nbsp;systems&nbsp;it&nbsp;&nbsp;<br />is&nbsp;a&nbsp;sensible&nbsp;choice.&nbsp;<br />12.4&nbsp;dietlibc&nbsp;<br /><a href="http://www.fefe.de/dietlibc/">http://www.fefe.de/dietlibc/</a>&nbsp;<br />This&nbsp;project&nbsp;aims&nbsp;to&nbsp;make&nbsp;it&nbsp;easy&nbsp;to&nbsp;create&nbsp;small&nbsp;statically&nbsp;linked&nbsp;programs&nbsp;<br />&nbsp;under&nbsp;Linux.&nbsp;<br />12.5&nbsp;newlib&nbsp;<br /><a href="http://sources.redhat.com/newlib/">http://sources.redhat.com/newlib/</a>&nbsp;<br />Newlib&nbsp;is&nbsp;a&nbsp;free&nbsp;C&nbsp;library&nbsp;intended&nbsp;for&nbsp;use&nbsp;on&nbsp;embedded&nbsp;systems,&nbsp;with&nbsp;less&nbsp;r&nbsp;<br />estrictive&nbsp;licensing&nbsp;than&nbsp;the&nbsp;GPL.&nbsp;However,&nbsp;it&nbsp;currently&nbsp;lacks&nbsp;the&nbsp;libgloss&nbsp;&nbsp;<br />layer&nbsp;necessary&nbsp;to&nbsp;use&nbsp;it&nbsp;as&nbsp;the&nbsp;C&nbsp;library&nbsp;under&nbsp;Linux.&nbsp;<br />12.6&nbsp;libc5&nbsp;<br />Older&nbsp;Linux&nbsp;libc's&nbsp;are&nbsp;often&nbsp;quite&nbsp;small,&nbsp;but&nbsp;generally&nbsp;not&nbsp;supported&nbsp;by&nbsp;any&nbsp;<br />one&nbsp;now.&nbsp;<br />----------------------------------------------------------------------------&nbsp;<br />----&nbsp;<br />Next&nbsp;Previous&nbsp;Contents&nbsp;&nbsp;<br />&nbsp;<br />--&nbsp;<br />&nbsp;<br />※&nbsp;来源:·BBS&nbsp;水木清华站&nbsp;smth.org·[FROM:&nbsp;166.111.161.8]&nbsp;<br /><a href="00000011.htm">上一篇</a><a href="javascript:history.go(-1)">返回上一页</a><a href="index.htm">回到目录</a><a href="#top">回到页首</a><a href="00000013.htm">下一篇</a></h1></center><center><h1>BBS 水木清华站∶精华区</h1></center></body></html>
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