Creating one large precompiled header from multitude of other (possibly also precompiled) headers.

[Jeff Law]

On 04/05/2016 05:30 AM, Jonathan Wakely wrote:
> On 5 April 2016 at 11:17, leon zadorin wrote:
>> Incidentally, would you have some thoughts on why this is the case? I
>> know nothing of the theoretical challenges in representing ASTs in
>> precompiled headers so I'm just wondering whether this behaviour is
>> due to just a shortage of interest/need/time in GCC development land,
>> or whether there are some fundamental technical constrains which would
>> impede getting this done.
>
> I believe the PCH is just a read-only dump of the contents of memory
> after the input header is processed.
Correct.

  I have no idea how feasible it
> would be to start poking at and extending those contents when read
> back in.
In theory it should be possible, but I doubt it is in practice with 
GCC's implementation.

Jeff