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Hi, |
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On Fri, 14 Nov 2014 09:08:17 -0500 Michael Orlitzky wrote: |
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> On 11/13/2014 10:17 AM, Ian Stakenvicius wrote: |
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> |
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> >> Isn't it possible to disable C++ in GCC with USE="-cxx"? |
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> > |
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> > It is.. but unfortunately there's no way in DEPEND to ensure it's |
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> > satisfied, as you can have a gcc installed with that flag enabled but |
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> > have a second one (that's actually selected in gcc-config) with it |
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> > disabled. A pkg_pretend check or a pkg_setup check (if you don't want |
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> > it to just fail in src_configure) is probably the best way to enforce |
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> > that one at this time. Unless there are other ways I'm not aware of?? |
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> |
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> Is this a case (as was recently suggested) where we're doing something |
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> stupid rather than asking for help from the PMS? This problem shows up |
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> in a few places -- off the top of my head: |
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> |
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> * GCC (see sys-apps/systemd-217.ebuild) |
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> * PHP (see comment in app-text/XML-Schema-learner-1.0.0.ebuild) |
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> * Python (all over the place) |
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> * Ruby (all over the place) |
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> |
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> Since all of the above are slotted, we can DEPEND on them, but we can't |
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> actually be sure that we're using the right slot at build time. The |
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> package manager knows that the right version is there, but it's not at |
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> the moment prepared to find and use it. |
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> |
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> Question 1: is it desirable to e.g. switch compilers, compile systemd, |
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> and then switch back? |
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This is definitely a good idea. Some packages are picky about gcc |
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versions, e.g. dev-util/nvidia-cuda-toolkit usually lags behind the |
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latest available gcc version by one. |
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|
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By the way we have another problem here: packages using cuda |
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build-time must require the same version of compiler as |
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nvidia-cuda-toolkit, or build will fail (app-crypt/johntheripper |
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[cuda] is a good example). Probably cuda eclass should be updated |
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to reflecth this change as well. |
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ATM I workaround issue with switching compilers to and from during |
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emerge run using app-portage/gcc-switcher from stuff overlay. |
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|
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Best regards, |
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Andrew Savchenko |
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