[Mlir-commits] [mlir] [mlir] Don't set RPATH for libMLIR (PR #121180)

[Maksim Levental]

makslevental wrote:

FYI I cooked this up as a workaround:

```
if(APPLE OR UNIX)
  set(_origin_prefix "\$ORIGIN")
  if(APPLE)
    set(_origin_prefix "@loader_path")
  endif()
  if (EUDSLPY_STANDALONE_BUILD)
    get_target_property(_mlir_loc MLIR LOCATION)
    get_target_property(_llvm_loc LLVM LOCATION)
  else()
    set(_mlir_loc "$<TARGET_FILE:MLIR>")
    set(_llvm_loc "$<TARGET_FILE:LLVM>")
  endif()
  set(_old_rpath "${_origin_prefix}/../lib${LLVM_LIBDIR_SUFFIX}")
  if(APPLE)
    execute_process(COMMAND install_name_tool -rpath "${_old_rpath}" ${_origin_prefix} "${_mlir_loc}" ERROR_VARIABLE rpath_err)
    execute_process(COMMAND install_name_tool -rpath "${_old_rpath}" ${_origin_prefix} "${_llvm_loc}" ERROR_VARIABLE rpath_err)
    # maybe already updated...
    if (rpath_err AND NOT rpath_err MATCHES "no LC_RPATH load command with path: ${_old_rpath}")
      message(FATAL_ERROR "couldn't update rpath because: ${rpath_err}")
    endif()
  else()
    # sneaky sneaky - undocumented
    file(RPATH_CHANGE FILE "${_mlir_loc}" OLD_RPATH "${_old_rpath}" NEW_RPATH "${_origin_prefix}")
    file(RPATH_CHANGE FILE "${_llvm_loc}" OLD_RPATH "${_old_rpath}" NEW_RPATH "${_origin_prefix}")
  endif()
  set_target_properties(eudslpy_ext PROPERTIES INSTALL_RPATH "${_origin_prefix}")
endif()
```

https://github.com/llvm/llvm-project/pull/121180