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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Thiago,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">I haven’t see the double entry pattern that you mention below. However, you might want to tell CMake to embed a BUILD_RPATH in your libraries. This should get
around the issue of manually setting LD_LIBRARY_PATH.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><a href="https://cmake.org/cmake/help/latest/prop_tgt/BUILD_RPATH.html?highlight=rpath">https://cmake.org/cmake/help/latest/prop_tgt/BUILD_RPATH.html?highlight=rpath</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">-kt<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> CMake <cmake-bounces@cmake.org>
<b>On Behalf Of </b>Thiago Crepaldi<br>
<b>Sent:</b> Thursday, February 14, 2019 12:43 AM<br>
<b>To:</b> cmake@cmake.org<br>
<b>Subject:</b> [CMake] Multiple occurrences of a library on linux (ldd)<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hello all,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">After reading CMake Cookbook I have written my first "complex" CMake build script based on the superbuild pattern. I am excited to heave a better understanding on CMake, but I definitely will learn much more from experience and your kind
help.<o:p></o:p></p>
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<p class="MsoNormal">In summary, the standalone google test application `standalone_gtests` publicly links to `libdatareader.so` and to pytorch libraries (`libc10.so`,`libcafee2.so`, `libtorch.so`).<o:p></o:p></p>
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<p class="MsoNormal">`libdatareader.so` also publicly links to pytorch libraries (I have a theoretical question on why `standalone_gtests` had to link to pytorch libraries if `libdatareader.so` already did, but that can wait).<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Compilation finishes successfully, but when I try to run `standalone_gtests`, it aborts because it cant find `libc10.so`. <o:p></o:p></p>
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<p class="MsoNormal">After executing `ldd standalone_gtests`, the weird result was that there were two entries for `libc10.so`. <o:p></o:p></p>
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<p class="MsoNormal">The first one maps to "not found" while the second had the correct path to the library. `libcaffe2.so`, which is also a pytorch library, has a single occurrence with full path.<o:p></o:p></p>
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<p class="MsoNormal">If I add the (...)/pytorch_external/(...) (see ldd output below) path to LD_LIBRARY_PATH, then everything works, but I would like to avoid this, if possible.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">`ldd ./subprojects/Build/datareaders_core_test/standalone_gtests <o:p></o:p></p>
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<p class="MsoNormal">libdatareader.so => /home/dev/miniconda3/datareaders_py37/build/stage/datareader/lib/libdatareader.so<o:p></o:p></p>
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<p class="MsoNormal"><span class="m6325779115560189611gmail-apple-tab-span">l</span>ibcaffe2.so => /home/dev/miniconda3/datareaders_py37/build/subprojects/Source/pytorch_external/torch/lib/libcaffe2.so<o:p></o:p></p>
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<p class="MsoNormal">libc10.so => not found<o:p></o:p></p>
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<p class="MsoNormal">libc10.so => /home/dev/miniconda3/datareaders_py37/build/subprojects/Source/pytorch_external/torch/lib/libc10.so<o:p></o:p></p>
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<p class="MsoNormal">(...)`<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Have anyone seen multiple entries for the same library on ldd before? Why is that? Is it because `standalone_gtests` links to libc10.so and to `libdatareader.so`, which in turn also links to `libc10.so`?<o:p></o:p></p>
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<p class="MsoNormal">Both CMakeLists.txt (libdatareader and standalone_gtests) succeeds at find_package(Torch REQUIRED QUIET) commands (${TORCH_LIBRARY} returns the correct path).<o:p></o:p></p>
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<p class="MsoNormal"><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 run the same build on my Mac and everything works fine, so that is confined to linux environment. I have destroyed my conda environment and performed multiple clean builds in the process and no luck :(<o:p></o:p></p>
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<p class="MsoNormal">Hoping this was some sort of ldconfig issue, I tried `sudo ldconfig` and `sudo rm /etc/ld.so.cache`, but that doesn't fix it.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Any ideas?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">best regards,<o:p></o:p></p>
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<p class="MsoNormal">Thiago<o:p></o:p></p>
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