New comment by pullmoll on void-packages repository

https://github.com/void-linux/void-packages/pull/18386#issuecomment-576755497

Comment:
FWIW `actiona` fails to build with:
```
cd actiontools/ && ( test -e Makefile || /usr/lib/qt5/bin/qmake -o Makefile /builddir/actiona-3.10.0/actiontools/actiontools.pro PREFIX=/usr LIB=/usr/lib QMAKE_CC=cc QMAKE_CXX=g++ QMAKE_LINK=g++ QMAKE_LINK_C=cc 'QMAKE_CFLAGS=-fstack-clash-protection -D_FORTIFY_SOURCE=2 -mtune=generic -O2 -pipe   -g' 'QMAKE_CXXFLAGS=-fstack-clash-protection -D_FORTIFY_SOURCE=2 -mtune=generic -O2 -pipe   -g' 'QMAKE_LFLAGS=-Wl,-z,relro -Wl,-z,now -Wl,--as-needed    ' ) && make -f Makefile 
Project ERROR: opencv development package not found
make: *** [Makefile:99: sub-actiontools-make_first-ordered] Error 3
=> ERROR: actiona-3.10.0_2: do_build: '${make_cmd} ${makejobs} ${make_build_args} ${make_build_target} CC="$CC" CXX="$CXX" LINK="$CXX"' exited with 2
=> ERROR:   in do_build() at common/build-style/qmake.sh:58
```

It seems that there is no `/usr/lib/pkgconfig/opencv.pc` or similar and `actiona` does not look for newer `libopencv`.