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Re: Bug#364231: [parisc-linux] Re: Bug#364231: exception catching

Matthias Klose wrote:
[should we drop parisc-linux?]

John David Anglin writes:
Er, no; we're talking about official Debian packages here, and the
libstdc++.so.6 in Debian is now from gcc-4.1.  The problem is precisely that
GMP *is* being built using gcc-4.0, but libstdc++ is from gcc-4.1, resulting
in the double libgcc_s problem.
Then, you must build *eveything* for hppa with gcc-4.1 or later.

Unfortunately, there's an ABI break.  Mixing libraries compiled with
4.0 or earlier with libraries compiled with 4.1 or later is just going
to cause unnecessary problems.   3.3 uses libstdc++.so.5, so you
avoid the double libgcc_s problem building GMP.  However, you still
have the ABI change affecting the passing and return of complex types.

At a fundamental level, libstdc++.so.6, libgfortran.so.1.0.0 and any
other gcc libraries built with 4.1 or later need glibc built with 4.1
to function correctly because of the various complex functions in
the math library.

I think there's a dynamic loader bug here as well.  I'm just
guessing but I think the double libgcc_s problem causes a problem
with the handling of .eh_frame data.

Ok, coming back to the question of the system compiler on hppa for
etch. Assuming that hppa does want to do that:

- is glibc buildable with gcc-4.1 on hppa?

Yes, and it seems to works nicely. People who want to try can fetch .deb from http://people.debian.org/~aurel32/hppa/

  .''`.  Aurelien Jarno	            | GPG: 1024D/F1BCDB73
 : :' :  Debian developer           | Electrical Engineer
 `. `'   aurel32@debian.org         | aurelien@aurel32.net
   `-    people.debian.org/~aurel32 | www.aurel32.net

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