vcpkg builds every port twice (release + debug) in manifest mode and the
VCPKG_BUILD_TYPE environment variable is ignored there; pin the build
type in overlay triplets instead (tooling/vcpkg-triplets/release, one per
supported triplet). The release configuration is what both workflows
consume: FFMPEG_DIR drives the release layout (lib/pkgconfig) and the C
ABI is identical for the debug binary CI tests. Verified locally in
debian:12: a release-only overlay builds zlib/libpng/openssl/pkgconf/
libsndfile with zero debug trees.
Debug-only is not an option: ports like zlib patch files in the release
layout and fail when only the debug configuration is built.
Mike-Solar
1dc5a77ab0