[llvm] statically link TableGenTests (#147577)

andrurogerz · web-flow · commit 080ade03ac21 · 2025-07-09T09:37:33.000-07:00
## Purpose Statically link `TableGenTests` so it can still build when linked against an LLVM Windows DLL. ## Background The effort to build LLVM as a WIndows DLL is tracked in #109483. Additional context is provided in [this discourse](https://discourse.llvm.org/t/psa-annotating-llvm-public-interface/85307). If `TableGenTests` is linked against LLVM built as a DLL on Windows, it will fail due to a large number of duplicate symbols found in both the LLVM DLL and TableGen libraries. This is because `LLVMTableGenBasic` and `LLVMTableGenCommon` are linked statically against LLVM (using `DISABLE_LLVM_LINK_LLVM_DYLIB`) so already contain a sub-set of symbols also exported from the LLVM DLL. This patch was originally part of #145448.
diff --git a/llvm/unittests/TableGen/CMakeLists.txt b/llvm/unittests/TableGen/CMakeLists.txt
@@ -13,6 +13,8 @@ add_llvm_unittest(TableGenTests
   AutomataTest.cpp
   CodeExpanderTest.cpp
   ParserEntryPointTest.cpp
+
+  DISABLE_LLVM_LINK_LLVM_DYLIB
   )
 
 target_link_libraries(TableGenTests PRIVATE LLVMTableGenCommon LLVMTableGen)

Original file line number	Diff line number	Diff line change
`@@ -13,6 +13,8 @@ add_llvm_unittest(TableGenTests`
`13`	`13`	`AutomataTest.cpp`
`14`	`14`	`CodeExpanderTest.cpp`
`15`	`15`	`ParserEntryPointTest.cpp`
	`16`	`+`
	`17`	`+ DISABLE_LLVM_LINK_LLVM_DYLIB`
`16`	`18`	`)`
`17`	`19`
`18`	`20`	`target_link_libraries(TableGenTests PRIVATE LLVMTableGenCommon LLVMTableGen)`