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On Saturday 24 April 2004 14:57, Paul Smith wrote: |
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> |
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> Certainly, but that's just a straightforward (heh! :)) cross-compiler |
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> issue: that's been a solved problem for years--not in Gentoo or Portage |
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> maybe, but in development communities. |
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> |
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> In this discussion I'm more concerned about issues specifically related |
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> to the way Portage itself is structured, not how the compile commands |
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> that ebuilds work. |
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> |
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> pdv> That is not possible, the only way to do it is with a chroot jail |
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> pdv> such that you create a similar environment. |
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> |
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> No; it certainly _IS_ possible. I'm doing it today, although I've had |
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> to do some hacking to Portage to get it to work. I'd like to see some |
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> of my changes move into Portage to allow it to become more flexible and |
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> to decrease the extent of my hacking. |
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> |
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> As you point out, there is some work required to get the compiler to |
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> find the things in the correct places, but again this is just the norm |
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> for any cross-compiler setup so it's not any extra work. We have a |
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> shell wrapper in front of gcc and g++ which sets things up based on an |
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> environment variable rather than hardcoded pathnames. |
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You are right. With gcc/g++/ld (and other) wrappers it is indeed possible to |
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do this. As such wrappers are not provided by gentoo (at least not for this |
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purpose) I did not take it into account. |
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> |
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> |
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> Chroot is not an attractive option for me. First, it's confusing in a |
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> cross-compiled environment; you have to install a complete _HOST_ setup |
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> in the _TARGET_ image (since that's where the chroot will leave you) so |
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> that you can run the cross-compilers: you need a HOST glibc, ld.so, |
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> etc. in the target image for use during the compile, as well the normal |
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> target glibc, ld.so, etc. so it's difficult to set up either way. Also, |
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> it requires root privileges which raises its own set of concerns in some |
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> circles. |
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Well, cross environments have been quite lacking for some time as the people |
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working on it went to zynot. You could work on getting the wrapper scripts |
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together with your portage patches accepted, but the wrappers are an |
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indispensible part. While you're at it, you could enhance the wrappers to |
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also also remove the /var/tmp/... part from the linking paths ;-) |
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Paul |
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-- |
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Paul de Vrieze |
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Gentoo Developer |
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Mail: pauldv@g.o |
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Homepage: http://www.devrieze.net |
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