Re: BUG #14033: cross-compilation to ARM fails

Andres Freund <andres@anarazel.de> writes:
> On 2016-04-15 00:08:02 -0400, Tom Lane wrote:
>> I can't see us taking either of those answers.  We haven't been willing
>> to accept a hard dependency on perl at build time, why would we do so
>> at run time?

> We could build pg_config both on the host and build architectures
> (presumably with the typical triplet as a prefix). Not sure how to
> automatically use that in pg_config --pgxs invocations in extension
> makefiles though.

Could we insist that for a cross-compilation, the appropriate instance
of pg_config has to be found first in the PATH under the name pg_config?
That turns it into a matter of preparing the build environment.

A different line of thought is to expose the data as data rather than
an executable.  For example, as a makefile fragment containing variable
assignments, which would be include'd by extension makefiles.  There
are a lot of problems to be solved with this idea too, of course:
what do you do to make it play in non-make-based build systems?  And
where would this file live?  The lack of a PATH mechanism makes it
far harder for would-be users to find the file.  Still, maybe we could
make something out of that approach.

            regards, tom lane