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<p class="MsoNormal">Hello Francesco,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">It would be helpful if you could provide more information about this, e.g. access to your layer or your recipes, to make sure they are actually being built correctly, also I would start by manually linking it against the built library to
see if the error is just not having them on the correct path, but I seem to remember a lot of issues when trying to cross compile openblas, specially for an arm MACHINE.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Alejandro<o:p></o:p></p>
<p class="MsoNormal"><a name="_MailEndCompose"><o:p> </o:p></a></p>
<span style="mso-bookmark:_MailEndCompose"></span>
<p class="MsoNormal"><b>From:</b> openembedded-core-bounces@lists.openembedded.org [mailto:openembedded-core-bounces@lists.openembedded.org]
<b>On Behalf Of </b>Francesco Giancane<br>
<b>Sent:</b> Wednesday, May 2, 2018 2:33 PM<br>
<b>To:</b> OE-core <openembedded-core@lists.openembedded.org><br>
<b>Subject:</b> [OE-core] python recipes with extensions fail to find/link with proper libraries<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hi Everyone,<o:p></o:p></p>
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<p class="MsoNormal">I found a problem working with python(3) and C extensions.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">The use-case is the recipe for python(3)-numpy, which can be linked against a BLAS/LAPACK library to use accelerated matricial and vectorial operations.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">As it is currently shipped, the recipe fails to find any proper library and then does not use extensions.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I wrote a custom recipe for openblas which is correctly built & deploy using standard commands.<o:p></o:p></p>
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<p class="MsoNormal">openblas is also added as a DEPENDS in a bbappend file for numpy.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">However, the do_compile phase cannot find the aforementioned library.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Log attached:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">DEBUG: Executing shell function do_compile<o:p></o:p></p>
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<p class="MsoNormal">blas_opt_info:<o:p></o:p></p>
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<p class="MsoNormal">blas_mkl_info:<o:p></o:p></p>
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<p class="MsoNormal">customize UnixCCompiler<o:p></o:p></p>
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<p class="MsoNormal"> libraries mkl_rt not found in ['/home/fgp/poky/rpi3_64/tmp/work/cortexa7hf-neon-vfpv4-poky-linux-gnueabi/python3-numpy/1.14.2-r0/recipe-sysroot-native/usr/lib']<o:p></o:p></p>
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<p class="MsoNormal"> NOT AVAILABLE<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">blis_info:<o:p></o:p></p>
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<div>
<p class="MsoNormal">customize UnixCCompiler<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> libraries blis not found in ['/home/fgp/poky/rpi3_64/tmp/work/cortexa7hf-neon-vfpv4-poky-linux-gnueabi/python3-numpy/1.14.2-r0/recipe-sysroot-native/usr/lib']<o:p></o:p></p>
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<div>
<p class="MsoNormal"> NOT AVAILABLE<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">openblas_info:<o:p></o:p></p>
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<div>
<p class="MsoNormal">customize UnixCCompiler<o:p></o:p></p>
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<div>
<p class="MsoNormal">customize UnixCCompiler<o:p></o:p></p>
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<p class="MsoNormal"> libraries openblas not found in ['/home/fgp/poky/rpi3_64/tmp/work/cortexa7hf-neon-vfpv4-poky-linux-gnueabi/python3-numpy/1.14.2-r0/recipe-sysroot-native/usr/lib']<o:p></o:p></p>
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<p class="MsoNormal"> NOT AVAILABLE<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">atlas_3_10_blas_threads_info:<o:p></o:p></p>
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<p class="MsoNormal">Setting PTATLAS=ATLAS<o:p></o:p></p>
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<div>
<p class="MsoNormal">customize UnixCCompiler<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> libraries tatlas not found in ['/home/fgp/poky/rpi3_64/tmp/work/cortexa7hf-neon-vfpv4-poky-linux-gnueabi/python3-numpy/1.14.2-r0/recipe-sysroot-native/usr/lib']<o:p></o:p></p>
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<div>
<p class="MsoNormal"> NOT AVAILABLE<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">atlas_3_10_blas_info:<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">customize UnixCCompiler<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> libraries satlas not found in ['/home/fgp/poky/rpi3_64/tmp/work/cortexa7hf-neon-vfpv4-poky-linux-gnueabi/python3-numpy/1.14.2-r0/recipe-sysroot-native/usr/lib']<o:p></o:p></p>
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<div>
<p class="MsoNormal"> NOT AVAILABLE<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">atlas_blas_threads_info:<o:p></o:p></p>
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<p class="MsoNormal">Setting PTATLAS=ATLAS<o:p></o:p></p>
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<div>
<p class="MsoNormal">customize UnixCCompiler<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> libraries ptf77blas,ptcblas,atlas not found in ['/home/fgp/poky/rpi3_64/tmp/work/cortexa7hf-neon-vfpv4-poky-linux-gnueabi/python3-numpy/1.14.2-r0/recipe-sysroot-native/usr/lib']<o:p></o:p></p>
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<div>
<p class="MsoNormal"> NOT AVAILABLE<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">atlas_blas_info:<o:p></o:p></p>
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<div>
<p class="MsoNormal">customize UnixCCompiler<o:p></o:p></p>
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<div>
<p class="MsoNormal"> libraries f77blas,cblas,atlas not found in ['/home/fgp/poky/rpi3_64/tmp/work/cortexa7hf-neon-vfpv4-poky-linux-gnueabi/python3-numpy/1.14.2-r0/recipe-sysroot-native/usr/lib']<o:p></o:p></p>
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<div>
<p class="MsoNormal"> NOT AVAILABLE<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<div>
<p class="MsoNormal">blas_info:<o:p></o:p></p>
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<div>
<p class="MsoNormal">customize UnixCCompiler<o:p></o:p></p>
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<p class="MsoNormal"> libraries blas not found in ['/home/fgp/poky/rpi3_64/tmp/work/cortexa7hf-neon-vfpv4-poky-linux-gnueabi/python3-numpy/1.14.2-r0/recipe-sysroot-native/usr/lib']<o:p></o:p></p>
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<div>
<p class="MsoNormal"> NOT AVAILABLE<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">blas_src_info:<o:p></o:p></p>
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<div>
<p class="MsoNormal"> NOT AVAILABLE<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<div>
<p class="MsoNormal"> NOT AVAILABLE<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">...And it is correct for it to fail as it is searching for openblas in the wrong path (sysroot-native vs sysroot).<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I would assume that this is a setuptools.bbclass issue, does anyone know what to do? Is it trivial to fix?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I noticed that all the shipped python extensions were built as if we were building for x86, even though the MACHINE is an arm target.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Thank you for your attention,<o:p></o:p></p>
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<p class="MsoNormal"><br clear="all">
<o:p></o:p></p>
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<p class="MsoNormal">Francesco Giancane<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in;vertical-align:top"><span style="font-family:"inherit",serif"><o:p> </o:p></span></p>
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