For example vc_lib, vc_x64_lib, vc_dll, vc_x64_dll, gcc_lib and gcc_dll all in
the same installation location. Disable the architecture (32 vs 64 bit)
compatibility check in the version file.
The config file uses the wxWidgetsTargets file to find all the libraries that
can be linked to.
It supports checking for components (e.g. base, core, aui, gl) and fails if a
requested component is not found.
Set the version compatibility to SameMinorVersion (when CMake supports this),
because different minor wxWidgets versions (3.0 and 3.1/3.2) are expected to
break API.
Because the default libraries are named like wx::wxname, create an alias that
is just called wx::name. CMake older than 3.18 does not support creating an
alias to non-global imported targets, so manually create a library with the
same properties.
The wxWidgets CMake build only builds the Release and Debug configurations, but
when creating a (MSVC) CMake project it also contains MinSizeRel and
RelWithDebInfo configurations. By default these seems to use the Debug
libraries, causing build errors. Map them to the Release libraries instead.
Also create a wxWidgets_LIBRARIES variable that can be used to link with, so
users can keep using the same variables from FindwxWidgets.
The headers are installed in 'include/wx-3.1/', so also use this in the INSTALL_INTERFACE.
Determine wxINSTALL_INCLUDE_DIR only once and reuse it in install.cmake.
Use wx_install macro so install is only used when wxBUILD_INSTALL is set.
The install.cmake script has a check for wxBUILD_INSTALL, so don't use it there.
Include the version and flavour in the target name, no need to rename anymore.
Add the wxrc symlink to extra uninstall files, not the actual target name.
Add CMake build system for libraries, tests and samples
update_files.py converts build/files into CMake format.
build/update-setup-h has been modified to update build/cmake/setup.h.in.
