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<div class="moz-cite-prefix">Le 29/04/2022 à 11:30, Javier Jimenez
Shaw a écrit :<br>
</div>
<blockquote type="cite"
cite="mid:CADRrdKt8yuQ+KfFkJait8=kf-EROzGd17a+6UGA2Fa_kxjVgWQ@mail.gmail.com">
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<div>We have a link problem on Linux when using GDAL
transiently. If we link the unit tests for a library which
depends on GDAL, i.e. an executable which transiently depends
on GDAL through our library, we get the following linker
error:</div>
<div><br>
</div>
<span>/usr/bin/ld:
libs/ioimage/tests/CMakeFiles/tests_unit_ioimage.dir/unit/writers/test_geoTiffWriter.cpp.o:
undefined reference to symbol '<a class="moz-txt-link-abbreviated" href="mailto:dlerror@@GLIBC_2.2.5">dlerror@@GLIBC_2.2.5</a>'<br>
</span>
<div><span>/usr/bin/ld: /lib/x86_64-linux-gnu/libdl.so.2: error
adding symbols: DSO missing from command line</span></div>
<div><br>
</div>
<div>We need to add <span>-ldl</span> to the linker line after
GDAL in order to resolve the linker problem. This can be done
when adding the property</div>
<div><br>
</div>
<span> INTERFACE_LINK_LIBRARIES "dl"</span><br>
<div><br>
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<div>to the GDAL::GDAL imported target in <span>GDAL-targets-release.cmake</span>
(this is a generated file); apparently it is not enough to add
dl to the IMPORTED_LINK_DEPENDENT_LIBRARIES_RELEASE property.</div>
<br>
<div>Does GDAL depend publicly on dl?</div>
</div>
</blockquote>
<p>Not that I'm aware of.</p>
<p>Our CI runs ./autotest/postinstall/test_cmake.sh which in
particular has a ./autotest/postinstall/test_cpp/CMakeLists.txt
that has GDAL has a dependency</p>
<p>Perhaps you could check how your setup is different from that ?<br>
</p>
<blockquote type="cite"
cite="mid:CADRrdKt8yuQ+KfFkJait8=kf-EROzGd17a+6UGA2Fa_kxjVgWQ@mail.gmail.com">
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<div>We do not find the proper way to patch GDAL's CMake code to
add that dependency in the generated config file.</div>
<div><br>
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<div>Thanks</div>
<div>Javier<br>
</div>
<div><br>
</div>
<div>
<div dir="ltr" class="gmail_signature"
data-smartmail="gmail_signature">.___ ._ ..._ .. . ._. .___
.. __ . _. . __.. ... .... ._ .__<br>
Entre dos pensamientos racionales <br>
hay infinitos pensamientos irracionales.<br>
<br>
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</blockquote>
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