Adds an opt-in LLAMA_BUILD_MTMD CMake option so build-xcframework.sh
can link libmtmd.a into the framework binary without pulling in the
rest of tools/ (which doesn't cross-build cleanly to iOS/tvOS/visionOS).
- CMakeLists.txt: new option, default OFF. When on with
LLAMA_BUILD_TOOLS=OFF, only the tools/mtmd subdir is added. Useful
for any binding that wants just libmtmd (Apple XCFramework, WASM).
- tools/mtmd/CMakeLists.txt: gate the CLI exe targets on
LLAMA_BUILD_TOOLS. Gating on LLAMA_BUILD_COMMON is not enough — it
defaults ON in standalone builds and visionOS xcodebuild then fails
with "install TARGETS given no BUNDLE DESTINATION for MACOSX_BUNDLE
executable target 'llama-mtmd-cli'".
- build-xcframework.sh: turn the option on, pass -DLLAMA_BUILD_MTMD,
add libmtmd.a to combine_static_libraries, and copy mtmd.h and
mtmd-helper.h into the framework Headers dir. The umbrella module
map then exposes them, so Swift / Obj-C consumers can import the
mtmd C API directly.
After this, nm on ios-arm64/llama.framework/llama shows 52 _mtmd_
symbols. Verified end-to-end: a Swift target links the produced
framework and calls mtmd_default_marker, mtmd_bitmap_init, etc.
without a shim on macos / iphoneos / iphonesimulator / xros slices.
Co-authored-by: Abraham Gonzalez <abraham@theabecaster.com>
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