qt/5.x.x: Requires main even for shared lib

[Fettpet]

Package and Environment Details (include every applicable attribute)

• Package Name/Version: qt/5.15.2
• Operating System+version: Windows
• Compiler+version: Visual Studio
• Docker image: every
• Conan version: every
• Python version: every

Conan profile (output of conan profile show default or conan profile show <profile> if custom profile is in use)

[settings]
os=Windows
os_build=Windows
arch=x86_64
arch_build=x86_64
compiler=Visual Studio
compiler.version=16
build_type=Release
[options]
[conf]
[build_requires]
[env]

Steps to reproduce (Include if Applicable)

Setup a project to build a dll. The dll depends on qt5. The dll has no main function. Because of line 882 + 883 each artefact needs a main function.

Expectations

I can include the qt5 recept without the requirements to have a main function. This approach would make the workaround of QWT useless.

[ericLemanissier]

I don't understand which problem you have currently. Could you please send a full log of a failure, which the conanfile and cmakelists.txt files used ?