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mcbartonmcbarton
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Use Oz and flto flags to reduce Emscripten shared library size
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‎.github/workflows/emscripten.yml‎

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@@ -194,6 +194,9 @@ jobs:
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-DLLVM_ENABLE_LIBPFM=OFF \
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-DCLANG_BUILD_TOOLS=OFF \
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-DLLVM_NATIVE_TOOL_DIR=$NATIVE_DIR \
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-DCMAKE_C_FLAGS_RELEASE="-Oz -g0" \
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-DCMAKE_CXX_FLAGS_RELEASE="-Oz -g0" \
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-DLLVM_ENABLE_LTO=Full \
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../llvm
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emmake ninja clang cling lld gtest_main
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else
@@ -225,6 +228,9 @@ jobs:
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-DCLANG_BUILD_TOOLS=OFF \
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-G Ninja \
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-DLLVM_NATIVE_TOOL_DIR=$NATIVE_DIR \
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-DCMAKE_C_FLAGS_RELEASE="-Oz -g0" \
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-DCMAKE_CXX_FLAGS_RELEASE="-Oz -g0" \
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-DLLVM_ENABLE_LTO=Full \
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../llvm
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emmake ninja libclang clangInterpreter clangStaticAnalyzerCore lldWasm
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fi
@@ -295,6 +301,9 @@ jobs:
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-DLLVM_BUILD_TOOLS=OFF `
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-DLLVM_ENABLE_LIBPFM=OFF `
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-DCLANG_BUILD_TOOLS=OFF `
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-DCMAKE_C_FLAGS_RELEASE="-Oz -g0" `
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-DCMAKE_CXX_FLAGS_RELEASE="-Oz -g0" `
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-DLLVM_ENABLE_LTO=Full `
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..\llvm
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emmake make clang cling lld gtest_main
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}
@@ -335,6 +344,9 @@ jobs:
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-DLLVM_BUILD_TOOLS=OFF `
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-DLLVM_ENABLE_LIBPFM=OFF `
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-DCLANG_BUILD_TOOLS=OFF `
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-DCMAKE_C_FLAGS_RELEASE="-Oz -g0" `
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-DCMAKE_CXX_FLAGS_RELEASE="-Oz -g0" `
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-DLLVM_ENABLE_LTO=Full `
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-G Ninja `
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..\llvm
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emmake ninja libclang clangInterpreter clangStaticAnalyzerCore lldWasm

‎Emscripten-build-instructions.md‎

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@@ -99,6 +99,9 @@ emcmake cmake -DCMAKE_BUILD_TYPE=Release \
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-DLLVM_ENABLE_LIBPFM=OFF \
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-DCLANG_BUILD_TOOLS=OFF \
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-DLLVM_NATIVE_TOOL_DIR=$NATIVE_DIR \
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-DCMAKE_C_FLAGS_RELEASE="-Oz -g0" \
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-DCMAKE_CXX_FLAGS_RELEASE="-Oz -g0" \
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-DLLVM_ENABLE_LTO=Full \
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../llvm
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emmake make libclang -j $(nproc --all)
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emmake make clangInterpreter clangStaticAnalyzerCore -j $(nproc --all)
@@ -130,6 +133,9 @@ emcmake cmake -DCMAKE_BUILD_TYPE=Release `
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-DLLVM_ENABLE_LIBPFM=OFF `
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-DCLANG_BUILD_TOOLS=OFF `
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-G Ninja `
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-DCMAKE_C_FLAGS_RELEASE="-Oz -g0" `
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-DCMAKE_CXX_FLAGS_RELEASE="-Oz -g0" `
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-DLLVM_ENABLE_LTO=Full `
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..\llvm
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emmake ninja libclang clangInterpreter clangStaticAnalyzerCore lldWasm
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```

‎docs/Emscripten-build-instructions.rst‎

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@@ -119,6 +119,9 @@ and osx
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-DLLVM_ENABLE_LIBPFM=OFF \
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-DCLANG_BUILD_TOOLS=OFF \
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-DLLVM_NATIVE_TOOL_DIR=$NATIVE_DIR \
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-DCMAKE_C_FLAGS_RELEASE="-Oz -g0" \
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-DCMAKE_CXX_FLAGS_RELEASE="-Oz -g0" \
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-DLLVM_ENABLE_LTO=Full \
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../llvm
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emmake make libclang -j $(nproc --all)
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emmake make clangInterpreter clangStaticAnalyzerCore -j $(nproc --all)
@@ -150,6 +153,9 @@ or executing
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-DLLVM_ENABLE_LIBPFM=OFF `
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-DCLANG_BUILD_TOOLS=OFF `
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-G Ninja `
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-DCMAKE_C_FLAGS_RELEASE="-Oz -g0" `
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-DCMAKE_CXX_FLAGS_RELEASE="-Oz -g0" `
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-DLLVM_ENABLE_LTO=Full `
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..\llvm
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emmake ninja libclang clangInterpreter clangStaticAnalyzerCore lldWasm
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‎lib/CppInterOp/CMakeLists.txt‎

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@@ -127,10 +127,16 @@ if(EMSCRIPTEN)
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set_target_properties(clangCppInterOp
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PROPERTIES NO_SONAME 1
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)
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target_compile_options(clangCppInterOp
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PRIVATE "SHELL: -Oz"
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PRIVATE "SHELL: -flto"
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)
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target_link_options(clangCppInterOp
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PRIVATE "SHELL: -s WASM_BIGINT"
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PRIVATE "SHELL: -s SIDE_MODULE=1"
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PRIVATE "SHELL: ${SYMBOLS_LIST}"
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PRIVATE "SHELL: -Oz"
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PRIVATE "SHELL: -flto"
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)
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else()
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target_link_options(clangCppInterOp

‎lib/CppInterOp/exports.ld‎

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@@ -50,4 +50,5 @@
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-Wl,--export=_ZNK5clang4Type14isFloatingTypeEv
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-Wl,--export=_ZNK5clang12FunctionDecl12getNumParamsEv
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-Wl,--export=__clang_Interpreter_SetValueNoAlloc
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-Wl,--export=__clang_Interpreter_SetValueWithAlloc
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-Wl,--export=__clang_Interpreter_SetValueWithAlloc
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-Wl,--export=_ZN4llvm15SmallVectorBaseIjE8set_sizeEm

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