2026-05-16 11:01:20 +05:30
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# WebAssembly (Emscripten) toolchain hook.
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2026-05-15 10:39:16 +05:30
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#
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2026-05-16 11:01:20 +05:30
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# Used by the `wasm` configure preset to chain-load the real Emscripten
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# toolchain from the active EMSDK. Phase 0 builds only the hello-world target
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# in wasm/ (Rule R5 — never blocks shipping). Phase 2 will compile the full
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# engine (PDFium + Skia + FreeType + HarfBuzz) through this same toolchain.
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2026-05-15 10:39:16 +05:30
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if(NOT DEFINED ENV{EMSDK})
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message(FATAL_ERROR
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"WASM build requested but EMSDK is not set in the environment.\n"
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"Install and activate the Emscripten SDK:\n"
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" git clone https://github.com/emscripten-core/emsdk\n"
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" ./emsdk install latest && ./emsdk activate latest\n"
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" source ./emsdk_env.sh (or emsdk_env.bat on Windows)\n"
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"Then re-run: cmake --preset wasm")
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endif()
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set(_emscripten_toolchain
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"$ENV{EMSDK}/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake")
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if(NOT EXISTS "${_emscripten_toolchain}")
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message(FATAL_ERROR "Emscripten toolchain not found at: ${_emscripten_toolchain}")
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endif()
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include("${_emscripten_toolchain}")
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# Engine blueprint §6.3: large PDFs can exceed the default WASM heap.
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set(CMAKE_EXE_LINKER_FLAGS_INIT "-sALLOW_MEMORY_GROWTH=1")
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