From 0a0cb5e051c3fec7e8ad24aeba0b4aaa6168cda0 Mon Sep 17 00:00:00 2001
From: mcbarton <matthew.c.barton@hotmail.co.uk>
Date: Wed, 29 Oct 2025 19:58:31 +0000
Subject: [PATCH 1/3] Search for lld for Emscripten builds that use cling

---
 CMakeLists.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5d1aa034d..cb2d8b313 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -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)

From 3bf5cd7d29dc4adf33c7322a03eca54fb688d58d Mon Sep 17 00:00:00 2001
From: mcbarton <matthew.c.barton@hotmail.co.uk>
Date: Wed, 29 Oct 2025 19:59:26 +0000
Subject: [PATCH 2/3] Add cling-exports.ld with LLVM and Clang exports

---
 lib/CppInterOp/cling-exports.ld | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 lib/CppInterOp/cling-exports.ld

diff --git a/lib/CppInterOp/cling-exports.ld b/lib/CppInterOp/cling-exports.ld
new file mode 100644
index 000000000..488b6b58c
--- /dev/null
+++ b/lib/CppInterOp/cling-exports.ld
@@ -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_

From e2b68c7be7b20f76f8a3a965b125cefc76ac8546 Mon Sep 17 00:00:00 2001
From: mcbarton <matthew.c.barton@hotmail.co.uk>
Date: Wed, 29 Oct 2025 20:01:29 +0000
Subject: [PATCH 3/3] Add different exports.ld for cling

---
 lib/CppInterOp/CMakeLists.txt | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/CppInterOp/CMakeLists.txt b/lib/CppInterOp/CMakeLists.txt
index 41288fb60..1267298c3 100644
--- a/lib/CppInterOp/CMakeLists.txt
+++ b/lib/CppInterOp/CMakeLists.txt
@@ -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}")