gason, vma, cityhash, 7zip (ext/lzma-sdk), basis_universal, pugixml,
kirk (ext/libkirk), sfmt19937, xbrz, and xxhash were each defined with
a small add_library() block directly in the root CMakeLists.txt, even
though ext/CMakeLists.txt already exists and handles every other vendor
library (freetype, imgui, naett, discord-rpc, libchdr, zstd, miniupnp,
armips, glew, snappy, ...) via add_subdirectory(). Gave each one its
own ext/<name>/CMakeLists.txt to match that established pattern; xxhash
stays a loose file pair in ext/ (it never had its own directory) so its
add_library() lives directly in ext/CMakeLists.txt instead.
ext/libkirk/CMakeLists.txt already existed but was dead - nothing
add_subdirectory()'d it, and its source list was stale (missing
amctrl.c/.h, which the live inline definition in root had). Replaced
its contents with the current, correct list instead of leaving two
diverging definitions around.
Dropped several target_include_directories()/include_directories()
calls that came along with these (e.g. cityhash, kirk, xbrz, xxhash,
and the lzma-sdk one for 7zip): traced their actual consumers and found
each library's own sources resolve their sibling headers via the
default same-directory quote-include rule, and every external consumer
already uses the full "ext/<name>/..." path resolved through the global
root include - so these were dead weight regardless of position.
Replaced two single-value alias variables (LIB7ZIP_LIBRARY, always
"7zip"; BASISU_LIBRARIES, always "basis_universal") with their target
names directly in Common/CMakeLists.txt, rather than trying to carry
them across the new add_subdirectory boundary - plain set() variables
don't propagate back up out of a child scope without PARENT_SCOPE, so
keeping them as-was would have silently broken Common's link line.
Verified with a fully clean rebuild (removed build/ entirely), a
HEADLESS=ON UNITTEST=ON build, and a LIBRETRO=ON build.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PSNaZnHCjmryS3ziVN9gZU
This wasn't doing anything on any platform, even in debug mode, it was
just in upstream in case someone wanted to debug xbrz.
Removing it, will have to remember to remove again when syncing upstream.
It makes Linux still break and does not help cross-compat.
