<div dir="ltr"><div>I don't understand why this bug has come back.</div><div><br></div><div>The error is here:</div><div><br></div><div><pre>checking how to run the C++ preprocessor... g++ -E
checking whether g++ supports C++11 features by default... yes
checking for OPENCV... no
checking for OPENCV... no
checking for OPENCV... no
configure: error: opencv not found. Not using some image processing.
tail -v -n \+0 config.log
==> config.log <==
</pre></div><div><br></div><div>because opencv 4.1.2 dropped the pkg-config file.</div><div>But opencv 4.1.2+dfsg-4 reintroduced the file (#942562) and now I can compile with pbuilder and opencv 4.1.2 without any issue.</div><div><br></div><div><span style="font-family:monospace">checking dependency style of g++... (cached) none<br>checking how to run the C++ preprocessor... g++ -E<br>checking whether g++ supports C++11 features by default... yes<br>checking for OPENCV... no<br>checking for OPENCV... no<br>checking for OPENCV... yes<br>checking for LIBRAW... yes<br>checking for LIBTIFF... yes<br>checking for jpeg_mem_src in -ljpeg... yes<br>checking for LIBPNG... yes</span><br></div></div>