Merging r310712:

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r310712 | mgorny | 2017-08-11 06:25:20 -0700 (Fri, 11 Aug 2017) | 26 lines

[cmake] Expose the dependencies of ExecutionEngine as PUBLIC

Expose the dependencies of LLVMExecutionEngine library as PUBLIC rather
than PRIVATE when building a shared library. This is necessary because
the library is not contained but exposes API of other LLVM libraries via
its headers.

This causes other libraries to fail to link if the linker verifies for
correctness of -l flags (i.e. fails on indirect dependencies). This e.g.
happens when building LLDB against shared LLVM:

  lib64/liblldbExpression.a(IRExecutionUnit.cpp.o):(.data.rel.ro._ZTIN4llvm18MCJITMemoryManagerE[_ZTIN4llvm18MCJITMemoryManagerE]+0x10): undefined reference to `typeinfo for llvm::RuntimeDyld::MemoryManager'
  lib64/liblldbExpression.a(IRExecutionUnit.cpp.o):(.data.rel.ro._ZTVN4llvm18MCJITMemoryManagerE[_ZTVN4llvm18MCJITMemoryManagerE]+0x60): undefined reference to `llvm::RuntimeDyld::MemoryManager::anchor()'
  lib64/liblldbExpression.a(IRExecutionUnit.cpp.o):(.data.rel.ro._ZTVN12lldb_private15IRExecutionUnit13MemoryManagerE[_ZTVN12lldb_private15IRExecutionUnit13MemoryManagerE]+0x48): undefined reference to `llvm::RTDyldMemoryManager::deregisterEHFrames()'
  lib64/liblldbExpression.a(IRExecutionUnit.cpp.o):(.data.rel.ro._ZTVN12lldb_private15IRExecutionUnit13MemoryManagerE[_ZTVN12lldb_private15IRExecutionUnit13MemoryManagerE]+0x60): undefined reference to `llvm::RuntimeDyld::MemoryManager::anchor()'
  lib64/liblldbExpression.a(IRExecutionUnit.cpp.o):(.data.rel.ro._ZTVN12lldb_private15IRExecutionUnit13MemoryManagerE[_ZTVN12lldb_private15IRExecutionUnit13MemoryManagerE]+0xd0): undefined reference to `llvm::JITSymbolResolver::anchor()'
  collect2: error: ld returned 1 exit status

Declaring the dependencies as PUBLIC guarantees that any package using
the ExecutionEngine library will also get explicit -l flags for
the dependent libraries guaranteeing that the symbols exposed in headers
could be resolved.

Patch originally written by NAKAMURA Takumi.

Differential Revision: https://reviews.llvm.org/D36211
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_50@311376 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/ExecutionEngine/CMakeLists.txt b/lib/ExecutionEngine/CMakeLists.txt
index 2d9337bbefd2de898712d0b809dd22cb38ac83cc..84b34919e442b50baa4df83ad8336186a64241d5 100644 (file)
--- a/lib/ExecutionEngine/CMakeLists.txt
+++ b/lib/ExecutionEngine/CMakeLists.txt
@@ -14,6 +14,10 @@ add_llvm_library(LLVMExecutionEngine
   intrinsics_gen
   )
 
+if(BUILD_SHARED_LIBS)
+  target_link_libraries(LLVMExecutionEngine PUBLIC LLVMRuntimeDyld)
+endif()
+
 add_subdirectory(Interpreter)
 add_subdirectory(MCJIT)
 add_subdirectory(Orc)