Add support for incomplete types #8133

Job	Run time
mingw (mingw64)	4m 29s
mingw (ucrt64)	3m 47s
build (windows-2019, Win32, v142, 17, Release)	2m 4s
build (windows-2019, Win32, v142, 17, Debug)	1m 19s
build (windows-2019, Win32, v142, 17, -DBUILD_SHARED_LIBS=ON, Debug)	1m 9s
build (windows-2019, x64, v142, 17, -DBUILD_SHARED_LIBS=ON, Debug)	1m 23s
build (windows-2019, x64, v142, 20, Debug)	1m 29s
build (windows-2019, x64, v141, 17, Debug)	1m 28s
build (windows-2019, x64, v141, 17, Release)	2m 17s
build (windows-2019, x64, v142, 17, -DBUILD_SHARED_LIBS=ON, Release)	2m 50s
build (windows-2019, x64, v142, 17, Debug)	1m 28s
build (windows-2019, x64, v142, 17, Release)	2m 10s
build (windows-2022, x64, v143, Debug, 20)	1m 36s
build (windows-2019, x64, v141, 14, Release)	2m 49s
build (windows-2019, Win32, v142, 17, -DBUILD_SHARED_LIBS=ON, Release)	1m 55s
build (windows-2019, x64, v142, 20, Release)	3m 3s
build (windows-2019, x64, v141, 14, Debug)	1m 51s
	37m 7s

Provide feedback