Arpad Boda created MINIFICPP-994:
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Summary: Opencv shouldn't be build by bootstrap (cmake), just
cloned. Building it should be part of MiNiFi build.
Key: MINIFICPP-994
URL: https://issues.apache.org/jira/browse/MINIFICPP-994
Project: Apache NiFi MiNiFi C++
Issue Type: Improvement
Affects Versions: 0.6.0
Reporter: Arpad Boda
Assignee: Nghia Le
Opencv is built when executing a cmake command (for eg. using bootstrap), which
seems to be wrong as:
* This build is single-threaded, takes a lot of time
* Linker warnings are generated when building MiNiFI:
```
ld: warning: direct access in function '___cxx_global_var_init.35' from file
'../thirdparty/opencv/opencv-external/src/opencv-external-build/lib/libopencv_flann.a(miniflann.cpp.o)'
to global weak symbol 'guard variable for
cvflann::anyimpl::SinglePolicy<std::__1::basic_string<char,
std::__1::char_traits<char>, std::__1::allocator<char> > >::policy' from file
'CMakeFiles/CaptureRTSPFrameTest.dir/CaptureRTSPFrameTest.cpp.o' means the weak
symbol cannot be overridden at runtime. This was likely caused by different
translation units being compiled with different visibility settings.
```
Static linking should be kept when integrating opencv build to the build
process of MiNiFi.
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