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e12a0128ab
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>