On 06/01/2017 16:52, Bill Greene wrote:
> This problem is not a generic gcc/gfortran one.
> If you build the test code on Linux, it works correctly.
>
> Bill
>

the problem is gfortran one on Windows platform

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=47030
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68040

If you create a directive like

--------------------------------------
!GCC$ ATTRIBUTES DLLEXPORT :: /cb1/
       integer cvar
       common /cb1/ cvar
--------------------------------------

It produces and error like
--------------------------------------
  !GCC$ ATTRIBUTES DLLEXPORT :: /cb1/
                                1
Error: Invalid character in name at (1)
--------------------------------------

so the DLLEXPORT directive is not correctly
managing "common" as "/cb1/"

I also noted that the "!GCC$" must be at the beginning of the line
otherwise is totally ignored, that is also very hard to note.

Regards
Marco