Re: Changed library interface causing FTBFS of cernlib?
On Mon, 23 Feb 2004, Branden Robinson wrote:
> On Mon, Feb 23, 2004 at 06:24:31AM -0500, Kevin B. McCarty wrote:
[...]
> > Presumably there was some reason that earlier, these extra libs were
> > only required on powerpc?
>
> I don't think that is a valid premise. I think they probably were.
Sorry, I should have been clearer. In my understanding, as of X 4.2.1,
the extra libraries like libICE.so and libSM.so needed to be explicitly
linked (via the arguments to gcc) only on powerpc; on other arches the
linker was able to figure out to link them in automatically via the lib
dependencies of libXm.so (Lesstif). That is, on any arch other than
powerpc, the linker flags would look like "-lXm ... -lX11" and on
powerpc, they needed to look like "-lXm ... -lX11 -lSM -lICE". If that
understanding is wrong (I wouldn't be surprised if it is, as it was
derived from the cernlib upstream lib dependency script), please correct
me again.
>From what James Troup said in a followup, it looks like the weird errors
were due not to a new requirement that libSM and libICE be explicitly
linked in, but rather due to a problem that left apt or dpkg thinking
libice6 was installed even though it was actually not. So I guess the
-lSM -lICE flags are still not explicitly required, and my question
becomes, is it _better_ to include those flags even if not explicitly
required?
> Yes, given the above linkage, you need to Build-Depend on:
> libxp-dev, libxt-dev, libxext-dev, libxpm-dev, libx11-dev, libsm-dev,
> libice-dev.
Cernlib depends upon libXp, libXext, libXpm, libSM and libICE only through
Lesstif, not explicitly. So I presume that I should Build-Depend upon:
lesstif2-dev|lesstif-dev, x-dev|xlibs-dev, libx11-dev|xlibs-dev,
libxt-dev|xlibs-dev
(where in each case the alternative is for woody back-portability); does
that seem correct?
thanks and regards,
--
Kevin B. McCarty <kmccarty@princeton.edu> Physics Department
WWW: http://www.princeton.edu/~kmccarty/ Princeton University
GPG: public key ID 4F83C751 Princeton, NJ 08544
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