Am 04.08.2011, 23:14 Uhr, schrieb Jonathan M Davis <[email protected]>:
Am 04.08.2011, 19:34 Uhr, schrieb Jonathan M Davis
<[email protected]>:
>> By the way... the druntime and phobos patches for LDC - are they
>> applicable to GDC and DMD as well? I'm asking because I could imagine
>> installing druntime, phobos, DMD, GDC and LDC and all three compilers
>> would use the same installation of the standard library.
>
> They _can't_ all use the same installations. At minimum, druntime
must be
> different for each of them. That's expected and by design. Whether
Phobos
> needs to be different for each or not as far as source goes, I don't
know
> (hopefully not, but there might be a reason why it has to). But since
the
> compiled library includes both druntime and Phobos, that can't be
shared.
>
> - Jonathan M Davis
Thank you for the clarification. My impression was that druntime was
created to make it possible to use either phobos or tango. If the
compiled
library includes both (with which compiler anyway? both GDC and LDC?) I
figure that I could not install any two of the three compilers in their
default locations on Linux, correct? If I take the time to create
packages
for Gentoo for the alternative compilers that is good to know. Symlinks
and altered library names for druntime/phobos would be required. But
with
a mix of DMD1, DMD2, GDC, LDC, Phobos and Tango things could become
messy
For D1, Phobos and Tango were incompatible, because they used different
runtimes. druntime was created for D2 (from Tango's runtime, I believe)
so
that it would be possible for Phobos and Tango to coexist in D2 (though
Tango
hasn't really been officially ported over to D2 yet). So, druntime
_does_ help
with mixing Phobos and Tango.
The problem is that druntime includes stuff which is compiler-specific.
It's
low-level stuff that must vary from compiler to compiler. As such, dmd,
gdc,
and ldc are all going to need somewhat different versions of druntime.
That
shouldn't be true for Phobos, but I don't know what the exact situation
with
gdc and ldc is. But regardless, you're getting one compiled library out
of the
deal, so that's going to be compiler-specific. And so yes, mixing dmd,
gdc,
and ldc on the same system could get a bit interesting in terms of how it
affects libraries and whatnot. Adding D1 versions of them into the mix
would
make it that much worse. But I've never tried gdc or ldc, and I always
install
dmd in my home directory, so I don't know what it takes to get them all
to mix
nicely in /usr or /opt. dmd.conf should take of the problem easily
enough for
dmd, but I don't know how all that works with gdc and ldc. So, if you're
looking to manage packages for Gentoo, good luck. It should be quite
doable,
but there are definite obstacles.
- Jonathan M Davis
I fully agree that Phobos and Tango should be independent from druntime
and the compiler. I'd say they must be. Otherwise gdc and ldc would
counter the work done on the separation of runtime and standard library.
