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developerWorks: Porting Linux Applications to 64-bit Systems

Apr 20, 2006, 05:30 (1 Talkback[s])
(Other stories by Harsha S. Adiga)

[ Thanks to An Anonymous Reader for this link. ]

"Linux was one of the first cross-platform operating systems to use 64-bit processors, and now 64-bit systems are becoming commonplace in servers and desktops. Many developers are now facing the need to port applications from 32-bit to 64-bit environments. With the introduction of Intel Itanium and other 64-bit processors, making software 64-bit-ready has become increasingly important.

"As with UNIX and other UNIX-like operating systems, Linux uses the LP64 standard, where pointers and long integers are 64 bits but regular integers remain 32-bit entities. Although some high-level languages are not affected by the size differences, others such as the C language may be..."

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