On Jul 2 2014, Bill Long wrote:

On Jul 2, 2014, at 2:11 AM, Rolf Rabenseifner <[email protected]> wrote:

...

The reason for removal of BIND(C) was simple: Four callbacks contain LOGICAL arguments and we learnt that LOGICAL and BIND(C) does not work together.

I considered an extension, mentioned it, and we discussed it. The problem is virtually insoluble, because the semantic models for Fortran LOGICAL and C truth values are so different, and any attempt to make them interoperate would be a truly ghastly mess. There are outstanding issues that could be changed, but this is not one. Yes, I know that Fortran 2008 makes LOGICAL(C_BOOL) interoperate with _Bool, but I regard that as being even more of a mistake than specifying that INTEGER(C_SIZE_T) interoperates with size_t. Don't go there; REALLY don't go there :-( Regards, Nick Maclaren.