[package] qt/5: Non-canonical cmake names

[ruilvo]

Package and Environment Details (include every applicable attribute)

• Package Name/Version: qt/5

I was trying to write a recipe for Kirigami (#5015) and in Kirigami's CMakeLists.txt one can read find_package(Qt5 ..., which is a valid way to look for Qt in the official docs for CMake usage. In the recipe I'm trying to make I used generators = "cmake", "cmake_find_package_multi" and then I got this error:

CMake Error at CMakeLists.txt:30 (find_package):
  Could not find a package configuration file provided by "Qt5" (requested
  version 5.14.0) with any of the following names:

    Qt5Config.cmake
    qt5-config.cmake

  Add the installation prefix of "Qt5" to CMAKE_PREFIX_PATH or set "Qt5_DIR"
  to a directory containing one of the above files.  If "Qt5" provides a
  separate development package or SDK, be sure it has been installed.

(yes, I know conan doesn't have 5.14.0, but that's not the point)

See how it looks for qt5-config.cmake? Well, the files conan offers are qt-config.cmake, qt-config-version.cmake, and qtTargets.cmake.

So I guess this is something in need of fixing.

[ruilvo]

I also noticed set_property(TARGET qt::qt in the file qt-config.cmake, and the targets Qt uses are like Qt5::Core and etc...

[ericLemanissier]

this is blocked by #4529

[ericLemanissier]

This is fixed by #5691

[ruilvo]

Thanks @ericLemanissier. I wrote that on other bugs and forgot about mine!!! hahah
Now we can start doing recipes for the KDE stuff!!