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perltru64 (1)


perltru64 - Perl version 5 on Tru64 (formerly known as Digital UNIX formerly known as DEC OSF/1) systems


Please see following description for synopsis


Perl Programmers Reference Guide                     PERLTRU64(1)

     README.tru64 - Perl version 5 on Tru64 (formerly known as
     Digital UNIX formerly known as DEC OSF/1) systems

     This document describes various features of HP's (formerly
     Compaq's, formerly Digital's) Unix operating system (Tru64)
     that will affect how Perl version 5 (hereafter just Perl) is
     configured, compiled and/or runs.

  Compiling Perl 5 on Tru64
     The recommended compiler to use in Tru64 is the native C
     compiler.  The native compiler produces much faster code
     (the speed difference is noticeable: several dozen
     percentages) and also more correct code: if you are
     considering using the GNU C compiler you should use at the
     very least the release of 2.95.3 since all older gcc
     releases are known to produce broken code when compiling
     Perl.  One manifestation of this brokenness is the lib/sdbm
     test dumping core; another is many of the op/regexp and
     op/pat, or ext/Storable tests dumping core (the exact
     pattern of failures depending on the GCC release and
     optimization flags).

     gcc 3.2.1 is known to work okay with Perl 5.8.0.  However,
     when optimizing the toke.c gcc likes to have a lot of
     memory, 256 megabytes seems to be enough.  The default
     setting of the process data section in Tru64 should be one
     gigabyte, but some sites/setups might have lowered that.
     The configuration process of Perl checks for too low process
     limits, and lowers the optimization for the toke.c if
     necessary, and also gives advice on how to raise the process

     Also, Configure might abort with

         Build a threading Perl? [n]
         Configure[2437]: Syntax error at line 1 : `' is not expected.

     This indicates that Configure is being run with a broken
     Korn shell (even though you think you are using a Bourne
     shell by using "sh Configure" or "./Configure").  The Korn
     shell bug has been reported to Compaq as of February 1999
     but in the meanwhile, the reason ksh is being used is that
     you have the environment variable BIN_SH set to 'xpg4'.
     This causes /bin/sh to delegate its duties to /bin/posix/sh
     (a ksh).  Unset the environment variable and rerun

  Using Large Files with Perl on Tru64
     In Tru64 Perl is automatically able to use large files, that
     is, files larger than 2 gigabytes, there is no need to use

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     the Configure -Duselargefiles option as described in INSTALL
     (though using the option is harmless).

  Threaded Perl on Tru64
     If you want to use threads, you should primarily use the
     Perl 5.8.0 threads model by running Configure with

     Perl threading is going to work only in Tru64 4.0 and newer
     releases, older operating releases like 3.2 aren't probably
     going to work properly with threads.

     In Tru64 V5 (at least V5.1A, V5.1B) you cannot build
     threaded Perl with gcc because the system header <pthread.h>
     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.

  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 "printf "%.33e",$num" 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.

  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 "-Dlocincpth=/some/include" and
     "-Dloclibpth=/some/lib" and before running "make test"
     setting your LD_LIBRARY_PATH to /some/lib.

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Perl Programmers Reference Guide                     PERLTRU64(1)

     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

  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.

  Warnings about floating-point overflow when compiling Perl on
     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:, 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 pp_sys.c is being compiled you may (depending
     on the operating system release) see an additional compiler
     flag being used: "-DNO_EFF_ONLY_OK".  This is normal and
     refers to a feature that is relevant only if you use the
     "filetest" 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.

Testing Perl on Tru64
     During "make test" the "comp/cpp" will be skipped because on
     Tru64 it cannot be tested before Perl has been installed.
     The test refers to the use of the "-P" option of Perl.

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

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     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.

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/' for module IO: Unresolved symbol in .../lib/perl5/5.8.0/alpha-dec_osf/auto/IO/ sockatmark at .../lib/perl5/5.8.0/alpha-dec_osf/ 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.

     Jarkko Hietaniemi <>

     See attributes(5) for descriptions of the following

     |Availability   | runtime/perl-512 |
     |Stability      | Uncommitted      |
     This software was built from source available at  The original
     community source was downloaded from

     Further information about this software can be found on the
     open source community website at

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