If enabled, this causes sys.setdlopenflags() being called with
RTLD_GLOBAL before the native Corrade module is loaded, in a hope to
resolve recurring nightmares with static Corrade and Magnum libraries
being linked into multiple dynamic modules.
This should make self-contained builds *actually* working out-of-the
box, without having to fiddle with PATH or nasty copying of all DLLs
somewhere inside a Python installation.
Need that for configuring plugins -- originally thought I'd wait until
the class is reworked, but that isn't coming anytime soon given there's
insane pressure on other things, so I have to figure out a plan B.
The interface is the most barebones possible, exposing nothing that I'd
later plan to rename or remove. Just the least possible amount of APIs
to make it possible to configure plugins, and no custom type support yet
either -- if you need to write a vector, write it as a formatted string
instead, sorry.
To make it possible to test the APIs in isolation instead of through
the plugin interface, I added also a Configuration class. Also just the
least amount possible to cover the code with tests.
That makes it much easier to handle in that case (because that's the
whole point of static builds) and also nicely circumvents any issues
with duplicated global data when a static lib would be linked to
multiple dynamic libraries.
Only the double ones, exposed as floats, because the extra ALU required
by doubles is negligible to function call overhead. It'll be different
for non-scalar types, but here I use this.
Vladimír Vondruš