On 02/19/2018 09:45 AM, Joseph Myers wrote:
On Sun, 18 Feb 2018, Sandra Loosemore wrote:
Thanks, this makes sense. I think I could produce a documentation patch that
explains that the difference is early vs late inclusion, and explains that any
declarations involving tree or rtx types must go in $target-protos.h because
those types are not defined when $target.h is included.
That's not the case now for tree or rtx types, since they're (forward)
declared in coretypes.h. It may still be the case for some types, but not
those.
OK, I think I misunderstood your previous message -- it's the
machine_mode-related types that have the circular dependency, but rtx
and tree no longer do. Is that right?
So am I right in thinking it is actually not possible to have a .h file for
internal bits shared between $target.c and the .md files, without hacking e.g.
genrecog.c which currently emits a fixed set of include directives?
I'm not aware of a way to do that.
Thinking about it some more, perhaps in $target-protos.h
#ifdef IN_TARGET_CODE
#include "$target-internal.h"
#endif
??
-Sandra
