I have now implemented stuff which enables part
of the package management system. It works like this:
1. Put Felix code in a nice_place.
2. Add
FLX_LIB_DIRS: nice_place
to your layout control file. The default one is:
$HOME/.felix/config/felix.fpc
The Felix compiler flxg will now search for include files
in directory "nice_place" as well as the usual places.
That's it!
The recommended nice place is:
/usr/local/lib/felix/packages/share/lib
You can have any number of nice places,
and you can include spaces in filenames with quotes:
FLX_LIB_DIRS: nice_place "another nice place"
(and quotes by using the other kind of quote .. escapes
are not supported because the escape char \ is also
the separator on Windows).
(at least .. i think that will work :)
How you get stuff into your package directory is up to you.
This mechanism will work now for pure Felix code.
For bindings to C/C++: in order to support #include
file searching, static linkage,load time dynamic linkage
and run time dynamic linkage, Felix usually uses
a package directive like:
.. requires package "gmp" ...
which in turn requires a file
gmp.fpc
to exist in the package database. That is normally found in:
$FLX_CONFIG_DIR
which is usually
$FLX_TARGET_DIR/config
which is usually
FLX_INSTALL_DIR/host/config
In other words, we need gmp.fpc to be in the target
config directory, but this is tricky. Such a file would
be clobbered on an upgrade. I do not know how
to do this yet. The package file is going to be different
for each target, in fact it may be gmp isn't available
on say iPhone.
Probably we will have
FLX_PACKAGE_DIR/target/config
to put the files in (for each target). The user will have to do this.
Felix can't know how to find things or what name various libraries
have. Some kind of guessing system might be useful.
Packages might come with prebuilt configs for popular layouts
(eg Debian Linux, -lgmp -lgmpxx works I think).
This means the next step will be to allow the user to
specify extra config directories to search.
Note of course if you do not use packages in your package .. er
I mean you do not use "require package" then you can just
manually specify the switches on the flx command line.
--
john skaller
skal...@users.sourceforge.net
http://felix-lang.org
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