[gtkmm-4.0.0/windows] Build failure due to definition of dllimport function not allowed
After locally fixing #84 (closed) I ran into:
[315/323] "C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/VC/Tools/MSVC/14.28.29333/bin/Hostx64/x64/cl.exe" "-Itests\bitset_iterator_test.exe.p" "-Itests" "-I..\src\gtkmm-4-b1a8913bb2\tests" "-Igtk" "-I..\src\gtkmm-4-b1a8913bb2\gtk" "-I..\src\gtkmm-4-b1a8913bb2\untracked\gtk" "-Igdk" "-I..\src\gtkmm-4-b1a8913bb2\gdk" "-I..\src\gtkmm-4-b1a8913bb2\untracked\gdk" "-IE:/vcpkg_folders/master/installed/x64-windows/debug/../include/giomm-2.68" "-IE:/vcpkg_folders/master/installed/x64-windows/debug/lib/giomm-2.68/include" "-IE:/vcpkg_folders/master/installed/x64-windows/debug/../include" "-IE:/vcpkg_folders/master/installed/x64-windows/debug/../include/glibmm-2.68" "-IE:/vcpkg_folders/master/installed/x64-windows/debug/lib/glibmm-2.68/include" "-IE:/vcpkg_folders/master/installed/x64-windows/debug/../include/glib-2.0" "-IE:/vcpkg_folders/master/installed/x64-windows/debug/lib/glib-2.0/include" "-IE:/vcpkg_folders/master/installed/x64-windows/debug/../include/sigc++-3.0" "-IE:/vcpkg_folders/master/installed/x64-windows/debug/lib/sigc++-3.0/include" "-IE:/vcpkg_folders/master/installed/x64-windows/debug/../include/gtk-4.0" "-IE:/vcpkg_folders/master/installed/x64-windows/debug/../include/cairo" "-IE:/vcpkg_folders/master/installed/x64-windows/debug/../include/pango-1.0" "-IE:/vcpkg_folders/master/installed/x64-windows/debug/../include/harfbuzz" "-IE:/vcpkg_folders/master/installed/x64-windows/debug/../include/fribidi" "-IE:/vcpkg_folders/master/installed/x64-windows/debug/../include/gdk-pixbuf-2.0" "-IE:/vcpkg_folders/master/installed/x64-windows/debug/../include/libpng16" "-IE:/vcpkg_folders/master/installed/x64-windows/debug/../include/pixman-1" "-IE:/vcpkg_folders/master/installed/x64-windows/debug/../include/graphene-1.0" "-IE:/vcpkg_folders/master/installed/x64-windows/debug/lib/graphene-1.0/include" "-IE:/vcpkg_folders/master/installed/x64-windows/debug/../include/cairomm-1.16" "-IE:/vcpkg_folders/master/installed/x64-windows/debug/lib/cairomm-1.16/include" "-IE:/vcpkg_folders/master/installed/x64-windows/debug/../include/pangomm-2.48" "-IE:/vcpkg_folders/master/installed/x64-windows/debug/lib/pangomm-2.48/include" "-IE:/vcpkg_folders/master/installed/x64-windows/include" "/MDd" "/nologo" "/showIncludes" "/W2" "/EHs-c-" "/std:c++17" "/permissive-" "/Od" "/Ob0" "/utf-8" "/wd4828" "/W3" "/wd4267" "/wd4530" "/wd4250" "/wd4251" "/wd4273" "/wd4275" "/wd4805" "-nologo" "-DWIN32" "-D_WINDOWS" "-W3" "-utf-8" "-GR" "-EHsc" "-MP" "-D_DEBUG" "-MDd" "-Z7" "-Ob0" "-Od" "-RTC1" "/Fdtests\bitset_iterator_test.exe.p\bitset_iterator_main.cc.pdb" /Fotests/bitset_iterator_test.exe.p/bitset_iterator_main.cc.obj "/c" ../src/gtkmm-4-b1a8913bb2/tests/bitset_iterator/main.cc
FAILED: tests/bitset_iterator_test.exe.p/bitset_iterator_main.cc.obj
E:\vcpkg_folders\glib_update\buildtrees\gtkmm\src\gtkmm-4-b1a8913bb2\untracked\gtk\gtkmm/expressionwatch.h(100): error C2491: 'Gtk::ExpressionWatch<T>::evaluate': definition of dllimport function not allowed
I assume a macro definition is missing.