[PATCH] D102090: [CMake][ELF] Link libLLVM.so and libclang-cpp.so with -Bsymbolic-functions

[Fangrui Song via Phabricator via cfe-commits]

MaskRay updated this revision to Diff 345264.
MaskRay retitled this revision from "[CMake][ELF] Add -fno-semantic-interposition and -Bsymbolic-functions" to "[CMake][ELF] Link libLLVM.so and libclang-cpp.so with -Bsymbolic-functions".
MaskRay edited the summary of this revision.
MaskRay added a comment.

Drop -fno-semantic-interposition


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D102090/new/

https://reviews.llvm.org/D102090

Files:
  clang/tools/clang-shlib/CMakeLists.txt
  llvm/tools/llvm-shlib/CMakeLists.txt


Index: llvm/tools/llvm-shlib/CMakeLists.txt
===================================================================
--- llvm/tools/llvm-shlib/CMakeLists.txt
+++ llvm/tools/llvm-shlib/CMakeLists.txt
@@ -50,6 +50,9 @@
       # Solaris ld does not accept global: *; so there is no way to version *all* global symbols
       set(LIB_NAMES -Wl,--version-script,${LLVM_LIBRARY_DIR}/tools/llvm-shlib/simple_version_script.map ${LIB_NAMES})
     endif()
+    # Optimize function calls and global variable access for default visibility
+    # definitions to avoid PLT and reduce dynamic relocations.
+    target_link_options(LLVM PRIVATE LINKER:-Bsymbolic-functions)
   elseif("${CMAKE_SYSTEM_NAME}" STREQUAL "Darwin")
     set(LIB_NAMES -Wl,-all_load ${LIB_NAMES})
   endif()
Index: clang/tools/clang-shlib/CMakeLists.txt
===================================================================
--- clang/tools/clang-shlib/CMakeLists.txt
+++ clang/tools/clang-shlib/CMakeLists.txt
@@ -48,3 +48,8 @@
                   ${_OBJECTS}
                   LINK_LIBS
                   ${_DEPS})
+# Optimize function calls and global variable access for default visibility
+# definitions to avoid PLT and reduce dynamic relocations.
+if (NOT APPLE)
+  target_link_options(clang-cpp PRIVATE LINKER:-Bsymbolic-functions)
+endif()


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