Mass Deface
explicitly checks for supported
C compilers, gcc (at least 3.2.2) not being one of them. But the
system C compiler should work just fine.
=head2 Long Doubles on Tru64
You cannot Configure Perl to use long doubles unless you have at least
Tru64 V5.0, the long double support simply wasn't functional enough
before that. Perl's Configure will override attempts to use the long
doubles (you can notice this by Configure finding out that the modfl()
function does not work as it should).
At the time of this writing (June 2002), there is a known bug in the
Tru64 libc printing of long doubles when not using "e" notation.
The values are correct and usable, but you only get a limited number
of digits displayed unless you force the issue by using C or the like. For Tru64 versions V5.0A through V5.1A, a
patch is expected sometime after perl 5.8.0 is released. If your libc
has not yet been patched, you'll get a warning from Configure when
selecting long doubles.
=head2 DB_File tests failing on Tru64
The DB_File tests (db-btree.t, db-hash.t, db-recno.t) may fail you
have installed a newer version of Berkeley DB into the system and the
-I and -L compiler and linker flags introduce version conflicts with
the DB 1.85 headers and libraries that came with the Tru64. For example,
mixing a DB v2 library with the DB v1 headers is a bad idea. Watch
out for Configure options -Dlocincpth and -Dloclibpth, and check your
/usr/local/include and /usr/local/lib since they are included by default.
The second option is to explicitly instruct Configure to detect the
newer Berkeley DB installation, by supplying the right directories with
C<-Dlocincpth=/some/include> and C<-Dloclibpth=/some/lib> B before
running "make test" setting your LD_LIBRARY_PATH to F.
The third option is to work around the problem by disabling the
DB_File completely when build Perl by specifying -Ui_db to Configure,
and then using the BerkeleyDB module from CPAN instead of DB_File.
The BerkeleyDB works with Berkeley DB versions 2.* or greater.
The Berkeley DB 4.1.25 has been tested with Tru64 V5.1A and found
to work. The latest Berkeley DB can be found from L.
=head2 64-bit Perl on Tru64
In Tru64 Perl's integers are automatically 64-bit wide, there is
no need to use the Configure -Duse64bitint option as described
in INSTALL. Similarly, there is no need for -Duse64bitall
since pointers are automatically 64-bit wide.
=head2 Warnings about floating-point overflow when compiling Perl on Tru64
When compiling Perl in Tru64 you may (depending on the compiler
release) see two warnings like this
cc: Warning: numeric.c, line 104: In this statement, floating-point overflow occurs in evaluating the expression "1.8e308". (floatoverfl)
return HUGE_VAL;
-----------^
and when compiling the POSIX extension
cc: Warning: const-c.inc, line 2007: In this statement, floating-point overflow occurs in evaluating the expression "1.8e308". (floatoverfl)
return HUGE_VAL;
-------------------^
The exact line numbers may vary between Perl releases. The warnings
are benign and can be ignored: in later C compiler releases the warnings
should be gone.
When the file F is being compiled you may (depending on the
operating system release) see an additional compiler flag being used:
C<-DNO_EFF_ONLY_OK>. This is normal and refers to a feature that is
relevant only if you use the C pragma. In older releases of
the operating system the feature was broken and the NO_EFF_ONLY_OK
instructs Perl not to use the feature.
=head1 Testing Perl on Tru64
During "make test" the C will be skipped because on Tru64 it
cannot be tested before Perl has been installed. The test refers to
the use of the C<-P> option of Perl.
=head1 ext/ODBM_File/odbm Test Failing With Static Builds
The ext/ODBM_File/odbm is known to fail with static builds
(Configure -Uusedl) due to a known bug in Tru64's static libdbm
library. The good news is that you very probably don't need to ever
use the ODBM_File extension since more advanced NDBM_File works fine,
not to mention the even more advanced DB_File.
=head1 Perl Fails Because Of Unresolved Symbol sockatmark
If you get an error like
Can't load '.../OSF1/lib/perl5/5.8.0/alpha-dec_osf/auto/IO/IO.so' for module IO: Unresolved symbol in .../lib/perl5/5.8.0/alpha-dec_osf/auto/IO/IO.so: sockatmark at .../lib/perl5/5.8.0/alpha-dec_osf/XSLoader.pm line 75.
you need to either recompile your Perl in Tru64 4.0D or upgrade your
Tru64 4.0D to at least 4.0F: the sockatmark() system call was
added in Tru64 4.0F, and the IO extension refers that symbol.
=head1 AUTHOR
Jarkko Hietaniemi
=cut