<_IsNative64Available Condition="'$(_IsNative64Available)' == '' and Exists('$(VCToolsInstallDir)\bin\amd64') and ('$(PROCESSOR_ARCHITECTURE)' == 'AMD64' or '$(PROCESSOR_ARCHITEW6432)' == 'AMD64')">true <_IsNativeEnvironment Condition="'$(_IsNativeEnvironment)' == '' and (('$(PROCESSOR_ARCHITECTURE)' == 'AMD64' and '$(UseEnv)' == 'true') or ('$(UseNativeEnvironment)' != 'false' and '$(_IsNative64Available)' == 'true'))">true