perlaix.1

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.\" ========================================================================
.\"
.IX Title "PERLAIX 1"
.TH PERLAIX 1 "2007-12-18" "perl v5.10.0" "Perl Programmers Reference Guide"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.SH "NAME"
README.aix \- Perl version 5 on IBM Unix (AIX) systems
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This document describes various features of \s-1IBM\s0's Unix operating
system (\s-1AIX\s0) that will affect how Perl version 5 (hereafter just Perl)
is compiled and/or runs.
.Sh "Compiling Perl 5 on \s-1AIX\s0"
.IX Subsection "Compiling Perl 5 on AIX"
When compiling Perl, you must use an \s-1ANSI\s0 C compiler. \s-1AIX\s0 does not ship
an \s-1ANSI\s0 compliant C\-compiler with \s-1AIX\s0 by default, but binary builds of
gcc for \s-1AIX\s0 are widely available.
.PP
At the moment of writing, \s-1AIX\s0 supports two different native C compilers,
for which you have to pay: \fBxlC\fR and \fBvac\fR. If you decide to use either
of these two (which is quite a lot easier than using gcc), be sure to
upgrade to the latest available patch level. Currently:
.PP
.Vb 2
\&    xlC.C     3.1.4.10 or 3.6.6.0 or 4.0.2.2 or 5.0.2.9 or 6.0.0.3
\&    vac.C     4.4.0.3  or 5.0.2.6 or 6.0.0.1
.Ve
.PP
note that xlC has the \s-1OS\s0 version in the name as of version 4.0.2.0, so
you will find xlC.C for \s-1AIX\-5\s0.0 as package
.PP
.Vb 1
\&    xlC.aix50.rte   5.0.2.0 or 6.0.0.3
.Ve
.PP
subversions are not the same \*(L"latest\*(R" on all \s-1OS\s0 versions. For example,
the latest xlC\-5 on aix41 is 5.0.2.9, while on aix43, it is 5.0.2.7.
.PP
Perl can be compiled with either \s-1IBM\s0's \s-1ANSI\s0 C compiler or with gcc.
The former is recommended, as not only can it compile Perl with no
difficulty, but also can take advantage of features listed later that
require the use of \s-1IBM\s0 compiler-specific command-line flags.
.PP
The \s-1IBM\s0's compiler patch levels 5.0.0.0 and 5.0.1.0 have compiler
optimization bugs that affect compiling perl.c and regcomp.c,
respectively.  If Perl's configuration detects those compiler patch
levels, optimization is turned off for the said source code files.
Upgrading to at least 5.0.2.0 is recommended.
.PP
If you decide to use gcc, make sure your installation is recent and
complete, and be sure to read the Perl \s-1INSTALL\s0 file for more gcc-specific
details. Please report any hoops you had to jump through to the development
team.
.Sh "\s-1OS\s0 level"
.IX Subsection "OS level"
Before installing the patches to the \s-1IBM\s0 C\-compiler you need to know the
level of patching for the Operating System. \s-1IBM\s0's command 'oslevel' will
show the base, but is not always complete (in this example oslevel shows
4.3.NULL, whereas the system might run most of 4.3.THREE):
.PP
.Vb 6
\&    # oslevel
\&    4.3.0.0
\&    # lslpp \-l | grep \*(Aqbos.rte \*(Aq
\&    bos.rte           4.3.3.75  COMMITTED  Base Operating System Runtime
\&    bos.rte            4.3.2.0  COMMITTED  Base Operating System Runtime
\&    #
.Ve
.PP
The same might happen to \s-1AIX\s0 5.1 or other \s-1OS\s0 levels. As a side note, perl
cannot be built without bos.adt.syscalls and bos.adt.libm installed
.PP
.Vb 4
\&    # lslpp \-l | egrep "syscalls|libm"
\&    bos.adt.libm      5.1.0.25  COMMITTED  Base Application Development