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Hongli Lai wrote:
>LiuCougar wrote:
>> thanks for your info, carl and Hongli Lai (oh, you have a Chinese
>> style name ;) )
>
>I'm Chinese.
>
>> Do gcc 3.2 and 3.3 have compatible ABI?
>
>Yes.

Disregard my email about the ABIs.

After checking the TeXinfo pages and other people, this is what it says:

g++ 2.95 =3D completely different ABI, and the Autopackage guys don't want=
=20
to support it. Note that KDE 3 officially supports it, but we plan to=20
move it to "it would be nice if it worked" for KDE4.

g++ 2.96 =3D not official g++ release, not compatible to anything

g++ 3.0 =3D different ABI, no longer supported. Compatible with 3.1.

g++ 3.2 =3D -fabi-version=3D1. Compatible with g++ 3.3

g++ 3.4 =3D -fabi-version=3D2. Compatible with g++ 4.0

If you have a g++ 3.4 or 4.0, you can just use the -fabi-version=3D switch=
=20
to tell it to generate an older ABI. So there's no need to have two=20
compilers installed in order to link.

However, you need two sets of libraries, one for each ABI. KDE does not=20
make that distinction in library sonames nor library paths, so you need=20
two completely different KDE prefixes (like /opt/kde3-abi1=20
and /opt/kde3-abi2). The datafiles can be shared, but not any of the=20
binaries.=20

Also consider that KDE uses the "kdeinit" technology, which means it=20
preloads some of the libraries. This, in special, means you CANNOT mix=20
environments. You cannot run a kdeinit-based application with one ABI if=20
your kdeinit was installed with another ABI. Doing so will cause crashes,=20
sooner or later.

The end result is that every C++ application must be compiled twice ---=20
one for each ABI, for each and every Autopackage package. In other words,=20
if you want to make KDE autopackages, you must use g++ 3.4 (because 4.0.0=20
miscompiles KDE).

Is that a good solution?

=2D-=20
  Thiago Macieira  -  thiago (AT) macieira (DOT) info
    PGP/GPG: 0x6EF45358; fingerprint:
    E067 918B B660 DBD1 105C  966C 33F5 F005 6EF4 5358

5. Swa he g=C3=A9anhwearf t=C3=B3 timbran, and hwonne he c=C3=B3m, l=C3=A1!=
 Unix cw=C3=A6=C3=B0 "Hello,=20
World". =C7=BCfre =C7=BDghwilc w=C3=A6s gl=C3=A6d and seo woruld w=C3=A6s f=
r=C3=A9o.

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