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Hi Perry, |
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On 12/11/2010 01:41 AM, Perry Smith wrote: |
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> Hi, |
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> |
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> I'm still digesting this but I wanted to mention something that I have not seen mentioned in all the text I've read so far which is "64 bit". |
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Exactly - for now, there is only 32bit support in Prefix for AIX (as well as HP-UX), |
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as I do not have any /real/ need for 64bit. And iff you don't write database engines, |
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I'm pretty sure you don't have a /real/ need for 64bit too. |
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However - you're welcome to do the ppc64-aix keywords ;) |
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> When I built my gcc this last time, I built gcc twice and the dependent libraries four times each. |
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> The process breaks down into this. |
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While gcc supports multilib on AIX out of the box, we have disabled any multilib |
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bit in Prefix in general. Instead, we support different Prefix installations |
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with different CHOST and KEYWORDs only. |
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> For both passes, I do "out of tree" builds and build each library in 32 bit mode and again in 64 bit mode. |
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> I then rename the 32 bit shared object to e.g. libmpfr32.so.1, the 64 bit object to libmpfr64.so.1, and then create an archive called libmpfr.a. |
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A Library called 'libmpfr.a' without any version number in plain filename |
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is calling for troubles[1]. |
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<snip> |
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> And, as an experiment, I moved my libmpfr.a library, pointed to it via LIBPATH, and could compile, link, and execute as well. |
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> So if things are in their normal position, no LIBPATH is needed. |
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> If they are moved elsewhere, setting LIBPATH allows them to be found and used. |
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As you said - using LIBPATH is an /experiment/. |
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Anything like LIBPATH never is a solution, but a call for troubles. |
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So we don't allow LIBPATH/LD_LIBRARY_PATH/etc. in Prefix. |
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> Again, to repeat, being able to move the libraries isn't my main objective. |
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Good to hear ;) |
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> My main point here is that every library, under my blue sky dream, would be compiled with both ABIs |
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> so that users could build complicated applications in 64 bit mode with very little trouble. |
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This is not supported by upstream portage yet. However, there are people |
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working in that direction[2]. But this does not necessarily mean we will |
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support that in Prefix whenever done upstream once. |
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[1] http://bugs.gentoo.org/show_bug.cgi?id=213277#c11 |
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[2] http://archives.gentoo.org/gentoo-dev/msg_46b23feaa62cfbc11abca5d9613fcd05.xml |
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/haubi/ |
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-- |
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Michael Haubenwallner |
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Gentoo on a different level |
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