findwxwidgets is broken on MSW in the latest release
AppVeyor has switched to cmake 3.15.1 which seems to have broken the following construct wxMaxima uses:
find_package(wxWidgets 3 REQUIRED std xml html adv aui core net base richtext)
include(${wxWidgets_USE_FILE})
The wxWidgets libraries are no more found even if the Right Path to them is specified and the right wxWidgets flavour has been selected:
cmake -DCMAKE_VERBOSE_MAKEFILE:BOOL=ON -LAH -DwxWidgets_CONFIGURATION=mswud -DwxWidgets_ROOT_DIR=C:\wxWidgets\ -DwxWidgets_LIB_DIR=C:\wxWidgets\lib\vc141_x64_dll -DCMAKE_BUILD_TYPE=debug ..
I am using Visual Studio and the pre-compiled wxWidgets packages from wxwidgets.org.
Error logs can be viewed here: