[zxing] ZXing library port added.

[machpavel]

No description provided.

[ras0219-msft]

Thanks for the PR!

1. Since this is a fork of zxing with the repo name zxing-cpp, I renamed the port to better match user expectations.
2. I looked through the CMake build and I don't see where there is a requirement for opencv[webp]. I've modified the PR to only require core, but could you indicate where the webp requirement comes from?

[machpavel]

Hi, thank you for the feedback.

1. OK, let's leave it like that. I just assumed, that since all libraries in vcpkg are C++, the cpp suffix is redundant...
2. The need for webp comes from the zxing-cv project; unresolved external symbol errors are thrown otherwise (at least on Ubuntu and GCC)

[PhilLab]

@ras0219-msft Could it be that the renaming zxing -> zxing-cpp led to some errors?

I am using the CMake integration

set(CMAKE_TOOLCHAIN_FILE "D:/DEVELOPMENT/vcpkg/scripts/buildsystems/vcpkg.cmake" CACHE STRING "")

and currently get the CMake error:

CMake Error at D:/DEVELOPMENT/vcpkg/installed/x64-windows/share/zxing/zxing-targets.cmake:80 (message):
  The imported target "zxing::zxing" references the file

     "D:/DEVELOPMENT/vcpkg/installed/x64-windows/tools/zxing-cpp/zxing.exe"

  but this file does not exist.

The slightly different file vcpkg/installed/x64-windows/tools/zxing-cpp/zxing.exe (with the -cpp) does exist.

Additionally, vcpkg\installed\x64-windows\share\zxing-cpp contains the copyright notice while vcpkg\installed\x64-windows\share\zxing contains the cmake scripts (zxing-config.cmake, zxing-targets.cmake, ...)

And the last question: What is the .exe for? Does my application need it as well?