I finally understand the cause of bug 1160, which I filed a few weeks
ago, and which has been preventing me from building Mozart 1.3.0 on
various new Linux distributions -- it failed on Debian unstable,
Mandrake 9.2, and SuSE 9.0. The problem was this:
http://dev.perl.org/perl5/news/2003/perl-5.8.1-RC3.html#hash%20randomisation
As of version 5.8.1, perl's foreach returns different key orders each
time it is run on the same hash table. mozart/platform/emulator/atoms.perl
had been relying on foreach returning the same key order every time it ran
on the %atoms and %names hashes, because it was called twice on each, once
to generate atoms.hh and once to generate atoms.cc. Because perl generated
different orders with each execution, the mapping of the preprocessor
#defines of atoms and names, such as AtomNil, to the generated atoms and
names, such as oz_atomNoDup("nil"), was random. That was why the atom
called "nil" was not equal to AtomNil.
When I replaced the four lines (two of each type) reading
foreach $key (keys %atoms) {
foreach $key (keys %names) {
in atoms.perl with
foreach $key (sort keys %atoms) {
foreach $key (sort keys %names) {
respectively, the build succeeded.
-
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