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On 29/11/12 11:09 AM, justin wrote: |
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> On 29/11/12 16:51, Ian Stakenvicius wrote: |
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>> On 29/11/12 09:56 AM, justin wrote: |
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>> |
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>>> Standard autotools based packages always use |
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>> |
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>>> --with-blas= |
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>> |
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>>> so it is pretty simple for us to make it to |
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>> |
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>>> --with-blas="$(pkg-config --libs blas)" |
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>> |
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>>> same thing goes for cmake and |
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>> |
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>>> -DBLAS_LIBRARIES="$(pkg-config --libs blas)" |
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>> |
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>>> This game has been played since ever, because blas/lapack are |
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>>> bundled in more then 80% of the packages using it. So we are |
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>>> used to patch them to use system libs. So why not making our |
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>>> lives easier by having a pkg-config option? |
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>> |
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>>> justin |
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>> |
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>> |
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>> ..ok remind me again what the .pc files provide you? this is so |
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>> that you can have slotted blas providers and various packages can |
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>> choose their preferred one instead of having to use the eselected |
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>> one? or... |
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>> |
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>> |
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>> |
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>> |
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>> |
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> |
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> Not exactly. The user can choose for each package newly by |
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> eselecting the wanted implementation. This is the user side. From |
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> the pm side we ensure that the choice is really respected by |
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> linking against package specific names [1] instead of the generic |
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> ones e.g. libblas.so. And this can be achieved in an easy way by |
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> using pkg-config. |
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> |
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> justin |
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> |
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> 1) # eselect blas set atlas-threads # pkg-config --libs blas |
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> -lptf77blas -lm -latlas -lpthread |
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> |
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> # eselect blas set reference # pkg-config --libs blas -lrefblas |
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> |
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> |
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|
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Doing this via an eclass that would export BLAS_LIBS and BLAS_CFLAGS |
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(and appending necessary equivalents to mycmakeargs) for src_configure |
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based on what is eselected wouldn't be as easy or easier to do? |
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