Mattias Gaertner wrote:
Hi,
Is there a recommended or usual way to install multiple FPC versions
and one fpc.cfg per version under Linux/Unix?
fpc 2.6.2 and 2.7.1 search fpc.cfg under Linux:
Configfile search: /home/mattias/.fpc.cfg
Configfile search: /usr/lib/fpc/etc/fpc.cfg
Configfile search: /etc/fpc.cfg
The second is actually
<directory of ppcx64>/../etc/fpc.cfg
So, fpc first searches a user config, then a "flavor" config (e.g. one
per version) and the last is the global config.
When installing multiple version of fpc you normally get
/usr/(local/)lib/fpc/2.6.2/ppcx86
/usr/(local/)lib/fpc/2.7.1/ppcx86
Because of the '..' in <>/../etc/fpc.cfg the version vanished in the
search. So by default you can not have one fpc.cfg per fpc version.
I've got a very vague recollection from elsewhere that you can do this
sort of thing using a unix-domain (named) pipe. In other words it would
probably be something like a "config-file server" daemon listening for
attempts to open /etc/fpc.cfg, finding out which backend fpc was
attempting to run, and returning (the content of) the appropriate file.
In practice it would probably be easier to patch /usr/local/bin/fpc, or
to wrap it in a script which renamed fpc.cfg on the fly.
--
Mark Morgan Lloyd
markMLl .AT. telemetry.co .DOT. uk
[Opinions above are the author's, not those of his employers or colleagues]
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