Many routine tests use an invalid reduction operator:

The following tests:

routine_bind.c
routine_bind.cpp
routine_bind_nonprototype_function_nonstring_function.cpp
routine_bind_nonprototype_function_nonstring_lambda.cpp
routine_bind_nonprototype_function_string_function.cpp
routine_bind_nonprototype_function_string_lambda.cpp
routine_bind_nonprototype_lambda_nonstring_function.cpp
routine_bind_nonprototype_lambda_nonstring_lambda.cpp
routine_bind_nonprototype_lambda_string_function.cpp
routine_bind_nonprototype_lambda_string_lambda.cpp
routine_bind_prototype_function_nonstring_function.cpp
routine_bind_prototype_function_nonstring_lambda.cpp
routine_bind_prototype_function_string_function.cpp
routine_bind_prototype_function_string_lambda.cpp
routine_bind_prototype_lambda_nonstring_function.cpp
routine_bind_prototype_lambda_nonstring_lambda.cpp
routine_bind_prototype_lambda_string_function.cpp
routine_bind_prototype_lambda_string_lambda.cpp

All use a - reduction operator. However 2.5.15 (in OpenACC3.3) lists the valid operators in C/C++ which are: +, *, max, min, &, |, ^, &&, and ||.

Clang currently diagnoses this, so many failures when running the test suite are encountered.

It isn't clear to me @ajarmusch what is intended in these tests, but it would be lovely if we could solve these.