GDC documentation is online and 13.x development updates.

[Iain Buclaw]

Hi,

There is now (long overdue) expanded documentation of the 
user-facing features of GDC online on GCC's documentation site.

https://gcc.gnu.org/onlinedocs/gdc/  (also in 
[PDF](https://gcc.gnu.org/onlinedocs/gdc.pdf) or 
[PostScript](https://gcc.gnu.org/onlinedocs/gdc.ps.gz) or an 
[HTML tarball](https://gcc.gnu.org/onlinedocs/gdc-html.tar.gz))

The GDC options documentation has been around since the start.  
What's new is the language reference section, covering code 
generation choices specific to GDC - what attributes are 
supported, intrinsics, pragmas, predefined versions, language 
extensions, missing features and deviations from spec, ...

More could be added or elaborated upon, such as what linkage do 
different symbols get, mixed language programming with C and C++, 
the anatomy of a TypeInfo and ModuleInfo object, and so on.  This 
is enough as a first revision just to get it off the ground.

Being a first revision, expect some grammar mistakes, and unclear 
use of language in some parts throughout.

If any curious reader spots any such mistakes, or thinks there 
needs to be more clarity in some phrase or paragraph, you can 
either [raise a bugzilla issue against 
GDC](https://gcc.gnu.org/bugzilla/enter_bug.cgi?product=gcc&component=d&version=13.0) or name and shame me here.

Meanwhile GDC-13 development is still tracking DMD's mainline 
branch, no plans to switch to a stable D2 release just yet.  DMD 
releases will resume a predictable cadence in the New Year, 
starting with the 2.102-beta release in January, meaning 
2.102-final in February.  So the expected D2 version GDC-13 would 
be using is v2.103.1 by the time our May release comes around.

Regards,
Iain.