On Feb 26 2013, Craig Rasmussen wrote:

I don't know what Bill will think of this but I think the problem should be resolved in the Fortran standard in the end so that

LOGICAL(C_INT)

is a legal type. This would allow mapping Fortran logical variables to C integers which is the type most C programmers use for logical variables anyway.

An interesting thought - a VERY interesting thought! The name C_INT wouldn't do, because kinds are specific to a type, but that's a detail. I can't think of any reason that it wouldn't work.

Does anyone know what size a default logical is in existing compilers? I assume it is the same size as a default integer.

It had better be - that's required by the standard, and has been since Fortran II. Regards, Nick Maclaren.