Log message:
graphics/opencv: avoid name-clash of complex macro for gcc<4.8

This adds #undef complex explicitly, to fix the build for older gccs that
don't have that in their headers for C++ code.

Log message:
graphics/opencv: disable stupid extern "C" that broke NetBSD build

For no good reason, perhaps for ancient LAPACK headers, the wrapper header
puts the includes into extern "C". This causes some compilers to complain
because LAPACK headers do C++ stuff if they see a C++ compiler and then
add extern "C" themselves.

Log message:
opencv: version 3.4.17 with proper explicit BLAS (CBLAS + LAPACKE) usage

This does the small bugfix update from 3.4.16 to 3.4.17 and adds proper usage
of BLAS stuff. There was linkage to BLAS before via numpy, but the internal
explicit BLAS-using code was not built, as the CMake machinery did not find it.

This commit drops an actually counterproductive patch and adds pkg-config
calls to find the BLAS-related libraries. Note that vor opencv-contrib-face,
the BLAS choice during its build doesn't really enter the result, apparently,
but the build process does use it and it would not help to confuse matters there.

I am not sure if the buildlink3.mk should also add blas.buildlink3.mk now. It
does not feature numpy right now. Should it?

Next step should be move towards 4.x at least.

Upstream:

December, 2021

OpenCV 3.4.17 has been released. Bug fixes, optimizations and other enhancements
are propagated into OpenCV 4.5.5.

Long-lived OpenCV 3.x release series is here since 2015. We are going to reduce
support of 3.x branch in the future to move forward to OpenCV 5.0.

Log message:
*: bump for openexr 3.2.1

Log message:
*: bump for protobuf 25

Log message:
*: recursive bump for cairo dependency changes

Log message:
*: revebump for new brotli option for freetype2

Addresses PR 57693

Log message:
opencv: replace c++11 with c++ in USE_LANGUAGES

This way USE_CXX_FEATURES works.

Log message:
opencv: pkglint cleanup

Log message:
*: recursive bump for protobuf