Don't use cmd.exe when generating with Ninja on Windows

Andrei_Datcu · April 26, 2021, 2:17pm

Because of this little colon here:

llvm/llvm-project/blob/llvmorg-12.0.0/llvm/cmake/modules/AddLLVM.cmake#L105


  set(native_export_file "${export_file}")
  set_property(TARGET ${target_name} APPEND_STRING PROPERTY
               LINK_FLAGS " -Wl,-bE:${export_file}")
elseif(LLVM_HAVE_LINK_VERSION_SCRIPT)
  # Gold and BFD ld require a version script rather than a plain list.
  set(native_export_file "${target_name}.exports")
  # FIXME: Don't write the "local:" line on OpenBSD.
  # in the export file, also add a linker script to version LLVM symbols (form: LLVM_N.M)
  add_custom_command(OUTPUT ${native_export_file}
    COMMAND echo "LLVM_${LLVM_VERSION_MAJOR} {" > ${native_export_file}
    COMMAND grep -q "[[:alnum:]]" ${export_file} && echo "  global:" >> ${native_export_file} || :
    COMMAND sed -e "s/$/;/" -e "s/^/    /" < ${export_file} >> ${native_export_file}
    COMMAND echo "  local: *;" >> ${native_export_file}
    COMMAND echo "};" >> ${native_export_file}
    DEPENDS ${export_file}
    VERBATIM
    COMMENT "Creating export file for ${target_name}")
  if (${LLVM_LINKER_IS_SOLARISLD})
    set_property(TARGET ${target_name} APPEND_STRING PROPERTY
                 LINK_FLAGS "  -Wl,-M,\"${CMAKE_CURRENT_BINARY_DIR}/${native_export_file}\"")
  else()

Note that I’m building on Windows but I’m targeting Linux ARM