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Enable cling based emscripten build #739

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Enable cling based emscripten build #739

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0a0cb5e
Search for lld for Emscripten builds that use cling
mcbarton Oct 29, 2025
3bf5cd7
Add cling-exports.ld with LLVM and Clang exports
mcbarton Oct 29, 2025
e2b68c7
Add different exports.ld for cling
mcbarton Oct 29, 2025
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3 changes: 3 additions & 0 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -106,6 +106,9 @@ include(GNUInstallDirs)
if (CPPINTEROP_USE_CLING)
message(STATUS "Mode CPPINTEROP_USE_CLING = ON")
find_package(LLVM REQUIRED CONFIG ${llvm_search_hints} NO_DEFAULT_PATH)
if(EMSCRIPTEN)
find_package(LLD REQUIRED CONFIG ${lld_search_hints} NO_DEFAULT_PATH)
endif()
find_package(Clang REQUIRED CONFIG ${clang_search_hints} NO_DEFAULT_PATH)
find_package(Cling REQUIRED CONFIG ${cling_search_hints} NO_DEFAULT_PATH)
endif(CPPINTEROP_USE_CLING)
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6 changes: 5 additions & 1 deletion lib/CppInterOp/CMakeLists.txt
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Expand Up @@ -122,7 +122,11 @@ if(EMSCRIPTEN)
# unit tests main_module you get errors due to undefined symbols. The reading of the file
# below into a SYMBOLS_LIST variable is a temporary workaround that exports the undefined
# symbols from the shared library, until it can be determined why they are not being exported already.
file(READ "${CMAKE_CURRENT_SOURCE_DIR}/exports.ld" SYMBOLS_LIST)
if (CPPINTEROP_USE_CLING)
file(READ "${CMAKE_CURRENT_SOURCE_DIR}/cling-exports.ld" SYMBOLS_LIST)
else()
file(READ "${CMAKE_CURRENT_SOURCE_DIR}/exports.ld" SYMBOLS_LIST)
endif()

# Replace newlines with spaces
string(REPLACE "\n" " " SYMBOLS_LIST "${SYMBOLS_LIST}")
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33 changes: 33 additions & 0 deletions lib/CppInterOp/cling-exports.ld
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Original file line number Diff line number Diff line change
@@ -0,0 +1,33 @@
-Wl,--export=_ZN4llvm13StringMapImpl11RehashTableEj
-Wl,--export=_ZN4llvm13StringMapImpl15LookupBucketForENS_9StringRefEj
-Wl,--export=_ZN4llvm13StringMapImpl4hashENS_9StringRefE
-Wl,--export=_ZN4llvm15SmallVectorBaseIjE8grow_podEPvmm
-Wl,--export=_ZN4llvm15allocate_bufferEmm
-Wl,--export=_ZN4llvm3sys17RunningOnValgrindEv
-Wl,--export=_ZN4llvm5APIntC1EjNS_8ArrayRefIyEE
-Wl,--export=_ZN5clang11DeclContext7classofEPKNS_4DeclE
-Wl,--export=_ZN5clang4Decl17castToDeclContextEPKS0_
-Wl,--export=_ZNK4llvm5APInt13compareSignedERKS0_
-Wl,--export=_ZNK4llvm5APInt4sextEj
-Wl,--export=_ZNK4llvm5APInt4zextEj
-Wl,--export=_ZNK4llvm5APInt7compareERKS0_
-Wl,--export=_ZNK5clang10ASTContext14getComplexTypeENS_8QualTypeE
-Wl,--export=_ZNK5clang10ASTContext19getTypeDeclTypeSlowEPKNS_8TypeDeclE
-Wl,--export=_ZNK5clang10ASTContext22getLValueReferenceTypeENS_8QualTypeEb
-Wl,--export=_ZNK5clang10RecordDecl19isInjectedClassNameEv
-Wl,--export=_ZNK5clang11DeclContext11decls_beginEv
-Wl,--export=_ZNK5clang11DeclContext6lookupENS_15DeclarationNameE
-Wl,--export=_ZNK5clang12FunctionDecl12getNumParamsEv
-Wl,--export=_ZNK5clang12FunctionDecl29getTemplateSpecializationArgsEv
-Wl,--export=_ZNK5clang12FunctionDecl31getTemplateInstantiationPatternEb
-Wl,--export=_ZNK5clang17ClassTemplateDecl18getSpecializationsEv
-Wl,--export=_ZNK5clang29VarTemplateSpecializationDecl22getSpecializedTemplateEv
-Wl,--export=_ZNK5clang4Decl13getASTContextEv
-Wl,--export=_ZNK5clang4Decl15hasDefiningAttrEv
-Wl,--export=_ZNK5clang4Sema15getStdNamespaceEv
-Wl,--export=_ZNK5clang4Type14isFloatingTypeEv
-Wl,--export=_ZNK5clang4Type27getUnqualifiedDesugaredTypeEv
-Wl,--export=_ZNK5clang7TagType7getDeclEv
-Wl,--export=_ZNK5clang7VarDecl28isThisDeclarationADefinitionERNS_10ASTContextE
-Wl,--export=_ZN4llvm3sys2fs17getMainExecutableEPKcPv
-Wl,--export=_ZN4llvm3sys4path6appendERNS_15SmallVectorImplIcEERKNS_5TwineES7_S7_S7_
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