ISO: help porting C code to 64 bit linux platform

I've got a body of C code some of which has run on multiple platforms
and some of which has only run on Solaris, until recently. A developer
worked at getting the code to compile on 32 bit Linux redhat, and that
appears to be working.

Now I'm looking at the impact of moving to a 64 bit Linux platform.
This will be the first time I've ever worked on a 64 bit machine.

I don't think that, at this time, the code _has_ to be compiled as 64
bit ... at least, not right away.

What should I be aware of as I begin compiling code there? Are there
special flags I will need to use to build things as 32 bit? Should I
byte the bullet and do the 64 bit port now? And what are some good
references to read on this topic? I tried to read an article at
intel.com on porting linux apps to 64 bit intel architecture, but part
of the document is missing. I'm also reading the Jaeger article on
porting to 64-bit GNU/Linux Systems. I was just hoping to find as many
tips as possible. I'm looking at the challenge of 64k lines of library
without regression tests to verify that things are working properly...

.

Relevant Pages

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