[mlir] [test] Fix missing SHLIB definition in standalone builds

[mgorny]

Define the LLVM_SHLIB_OUTPUT_INTDIR variable that is used by configure_lit_site_cfg to fill SHLIBDIR. This fixes tool tests that would otherwise be unable to find MLIR's runtime shared libraries (e.g. libmlir_runner_utils.so). The logic is copied verbatim from Clang.

[llvmbot]

@llvm/pr-subscribers-mlir

Author: Michał Górny (mgorny)

Changes

Define the LLVM_SHLIB_OUTPUT_INTDIR variable that is used by configure_lit_site_cfg to fill SHLIBDIR. This fixes tool tests that would otherwise be unable to find MLIR's runtime shared libraries (e.g. libmlir_runner_utils.so). The logic is copied verbatim from Clang.

---

Full diff: https://github.com/llvm/llvm-project/pull/120907.diff

1 Files Affected:

• (modified) mlir/CMakeLists.txt (+9)

diff --git a/mlir/CMakeLists.txt b/mlir/CMakeLists.txt
index 0608eef15c5a4b..99ea1b70fbc4d2 100644
--- a/mlir/CMakeLists.txt
+++ b/mlir/CMakeLists.txt
@@ -36,6 +36,15 @@ if(MLIR_STANDALONE_BUILD)
     "${CMAKE_CURRENT_BINARY_DIR}/lib${LLVM_LIBDIR_SUFFIX}")
   set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/bin")
 
+  # These definitions are needed to fill SHLIBDIR in tests.
+  set(LLVM_RUNTIME_OUTPUT_INTDIR ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/bin)
+  set(LLVM_LIBRARY_OUTPUT_INTDIR ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/lib${LLVM_LIBDIR_SUFFIX})
+  if(WIN32 OR CYGWIN)
+    # DLL platform -- put DLLs into bin.
+    set(LLVM_SHLIB_OUTPUT_INTDIR ${LLVM_RUNTIME_OUTPUT_INTDIR})
+  else()
+    set(LLVM_SHLIB_OUTPUT_INTDIR ${LLVM_LIBRARY_OUTPUT_INTDIR})
+  endif()
   set(LLVM_LIT_ARGS "-sv" CACHE STRING "Default options for lit")
 endif()