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Top Forums Programming Integer size with different compile Post 303000989 by jlliagre on Monday 24th of July 2017 06:46:29 PM
Old 07-24-2017
Quote:
Originally Posted by arunkumar_mca
I was in assumption the size of integer for 32 bit will be 2 ^32 and size of 64 bit compiled version will be 2 ^ 64.
You assumption was wrong.

Most 64 bit platforms (Windows, Linux, Solaris, AIX, HP-UX, MacOS, BSD, ...) have selected the LP64 data model, meaning an integer (i.e. an int in C) is still 32 bit while only long and pointers are 64 bits. This page explain why this was preferred against the various possible alternatives.
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PERLRISCOS(1)						 Perl Programmers Reference Guide					     PERLRISCOS(1)

NAME
perlriscos - Perl version 5 for RISC OS DESCRIPTION
This document gives instructions for building Perl for RISC OS. It is complicated by the need to cross compile. There is a binary version of perl available from <http://www.cp15.org/perl/> which you may wish to use instead of trying to compile it yourself. BUILD
You need an installed and working gccsdk cross compiler <http://gccsdk.riscos.info/> and REXEN <http://www.cp15.org/programming/> Firstly, copy the source and build a native copy of perl for your host system. Then, in the source to be cross compiled: 1. $ ./Configure 2. Select the riscos hint file. The default answers for the rest of the questions are usually sufficient. Note that, if you wish to run Configure non-interactively (see the INSTALL document for details), to have it select the correct hint file, you'll need to provide the argument -Dhintfile=riscos on the Configure command-line. 3. $ make miniperl 4. This should build miniperl and then fail when it tries to run it. 5. Copy the miniperl executable from the native build done earlier to replace the cross compiled miniperl. 6. $ make 7. This will use miniperl to complete the rest of the build. AUTHOR
Alex Waugh <alex@alexwaugh.com> perl v5.16.3 2013-03-04 PERLRISCOS(1)
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