Date: Sat, 27 Jan 2018 16:22:02 -0600 From: "A. Wilcox" <awilfox@...lielinux.org> To: musl@...ts.openwall.com Subject: Re: will this idea work? On 01/25/18 20:07, Rich Felker wrote: > On Thu, Jan 25, 2018 at 01:31:38PM -0800, Po-yi Wang wrote: >> >> >> On Thu, 25 Jan 2018, Rich Felker wrote: >> >>> On Thu, Jan 25, 2018 at 12:09:27PM -0800, Po-yi Wang wrote: >>>> i scanned through the musl mailing list archive, it seemed that >>>> the minimum supported binutils version has been discussed before, >>>> around October 15, 2015. what is the current recommended >>>> gcc+binutils >>>> version that can support 486,armv5,ppc750? >>> >>> In general, old versions of both binutils and gcc have lots of unfixed >>> bugs, and it's hard to assess completely whether musl will be >>> affected. Non-x86 platforms are much less tested in combination with >>> outdated tools. I would highly recommend against running binutils >>> versions much older than 2.20 or so, and ideally you should be using >>> 2.25 or later. >>> >>> Is there a reason you really want to use old versions? >> not at all, i do not mind using binutils-2.24 for example, except >> old gcc (gcc-3.x) will probably not consent to work with it. >> working with new tools require extensive testing. > > I don't know any reason to expect old gcc to fail with new binutils. > New versions of binutils have to accept old .o files (e.g. from old .a > library archives) and asm hand-written for old versions of the > assembler, etc. and all gcc does is feed asm to the assembler. > >> it would be best to work with known tools, if no new requirement >> asked for. >> besides, new tools normally demand more resources--memory for example. > > This is definitely true of gcc, but not nearly as much so for > binutils. > >> newer binutils, for example, require new patches to conserve memory... >> it is not imperative, but if i have the time or will, i like to see >> some old hardware can compile on its own, un-assisted by 16G equipped >> x86-64, few simple tools. it used to be possible. so what has changed? >> new tools might have new bugs. Though I can't really comment on speed, I will say that for the following hardware platforms: * x86: Pentium III 733MHz, 1 GB RAM, 100 GB PATA disk * PPC: G3 600MHz, "Snow" iBook, 640 MB RAM, 40 GB PATA disk I was able to build an entire Gentoo stage3 using musl + gcc 5.3 + binutils 2.27. This was "Foxtoo", the project before Adélie. There was no x86_64 builder of any kind involved, except the initial cross. They did however both take a few days of building without being powered off. I will, however, agree that GCC 7 seemed to me to be a hot mess. Haven't evaluated 7.2, but 7.1 was completely unusable for us. Best, --arw -- A. Wilcox (awilfox) Project Lead, Adélie Linux http://adelielinux.org Download attachment "signature.asc" of type "application/pgp-signature" (867 bytes)
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