The vcpkg manifest lists ffmpeg as an unconditional dependency, but RTS_BUILD_OPTION_FFMPEG defaults to OFF and no preset or CI job turns it on. The only consumer is guarded at Core/GameEngineDevice/CMakeLists.txt:236, so vcpkg builds ffmpeg from source on every cold build and no target links it.
On a cold win32-vcpkg build it accounts for 19 minutes of roughly 26. Every other package combined is under 30 seconds: zlib 4.3s, stb 385ms, pkgconf 15s, and the vcpkg-* helpers in milliseconds.
Reproduction:
- Configure any
win32-vcpkg preset against an empty binary cache
- Look for
Elapsed time to handle ffmpeg:x86-windows in the vcpkg install output
- Confirm no target links FFmpeg, since
RTS_BUILD_OPTION_FFMPEG is OFF
Note that RTS_BUILD_OPTION_FFMPEG is not defined until cmake/config.cmake is included at CMakeLists.txt:65, which is after project() at line 34 where the vcpkg toolchain resolves the manifest.
The vcpkg manifest lists
ffmpegas an unconditional dependency, butRTS_BUILD_OPTION_FFMPEGdefaults to OFF and no preset or CI job turns it on. The only consumer is guarded atCore/GameEngineDevice/CMakeLists.txt:236, so vcpkg builds ffmpeg from source on every cold build and no target links it.On a cold
win32-vcpkgbuild it accounts for 19 minutes of roughly 26. Every other package combined is under 30 seconds: zlib 4.3s, stb 385ms, pkgconf 15s, and the vcpkg-* helpers in milliseconds.Reproduction:
win32-vcpkgpreset against an empty binary cacheElapsed time to handle ffmpeg:x86-windowsin the vcpkg install outputRTS_BUILD_OPTION_FFMPEGis OFFNote that
RTS_BUILD_OPTION_FFMPEGis not defined untilcmake/config.cmakeis included atCMakeLists.txt:65, which is afterproject()at line 34 where the vcpkg toolchain resolves the manifest.