Some of the SAP HANA 2 ODBC header files in sdk/odbc/incl contain C++ comments (starting with //).
We compile our ODBC client application with all warnings on and -Werror option. For now we have 2 workarounds: Edit and fix the original ODBC header or (2) do not compile with -Werror.
However, we consider this problem as a bug:
Since ODBC is by essence a C API, the header files should only contain /* ... */ C comments.
Note: We are new at SAP HANA 2 Express Edition, and would like to report issues, but it seems that my account is not allowed to report incidents. Please as SAP HANA Express Edition user let us report problems and follow up.