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Newsgroups: gnu.g++.help
From: Paul Pluzhnikov <ppluzhnikov-...@gmail.com>
Date: Tue, 12 Feb 2008 23:13:01 -0800
Local: Wed, Feb 13 2008 2:13 am
Subject: Re: GLIBC conformance
"Gerd Keller" <dev...@arcor.de> writes: No, it doesn't. It probably uses glibc 2.3.2. > I have build an programm with ubuntu 7.10. There it is running fine. > but it is supposed to run on an debian machine. when starting the > # ./server.sh > the debian machine uses glibc 2.32 > Do the glibc version have to be identicaly? No. UNIX machines in general support backwards compatibility, but not "forward" compatibility. That means, that you can expect a binary compiled on an older machine to continue working fine on a newer one (newer glibc continues to support "backward" binaries), but you can *not* expect a binary built on newer machine to work on an older one (the older glibc has no clue how to support features which haven't been invented yet). > I have read that upgrading/downgrading glibc is a heavy task. It's not necessarily "heavy" if you use precompiled packages, but building your own requires extreme care -- you can easily make your system un-bootable if you make a single mistake. > Is there a compiler switch to toggle a specific glibc version or to make the No. > binary glibc conform. > Do you know another solution to the problem? There are three general solutions (listed in order of increasing difficulty): 1. Build on the oldest release of glibc you plan to support (we build on ancient RedHat 6.2 with glibc-2.1, and it runs *everywhere*). 2. Use Autopackage (http://autopackage.org/apbuild-apgcc.php) 3. Use x86-glibc-2.4 -> x86-glibc-2.3.2 cross-gcc (see http://www.kegel.com/crosstool). Cheers, You must Sign in before you can post messages.
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