20 issues of porting C++ code on the 64-bit platform

[WandererMaster]

Our team is work on the subject of 64-bit developing. We write new article for 64-bit developers: 20 issues of porting C++ code on the 64-bit platform.

See PDF:
http://www.viva64.com/articles/20%20issues%20of%20porting%20C++%20code%20on%20the %2064-bit%20platform.pdf

We hope the article has been useful for you and will help to simplify the development and debugging of 64-bit applications.
We will be glad to receive your opinions, remarks, corrections, additions and will surely include them in the next version of the article.

[Nils Pipenbrinck]

SPAM!

And not even helpfull. They just try to spread fear among the 32 bit developers that the code the write today will fail and make money with it.

I work cross platform on Win32 and MIPS64, and I have NO issues with portability.

[WandererMaster]

I work cross platform on Win32 and MIPS64, and I have NO issues with portability.

Is MIPS64 have ILP64 data model?
No problem to port ILP32 to ILP64 system.

How many thousand lines were in the project?

[WandererMaster]

I work cross platform on Win32 and MIPS64, and I have NO issues with portability.

Untruth.

See:

http://channel9.msdn.com/ShowPost.aspx?PostID=53939
"Kang Su Gatlin - On the 64-bit Whiteboard"
Now we get into some 64-bit code on the whiteboard and learn some things you need to think about when you move to 64-bit systems. Kang Su Gatlin is a program manager on the Visual C++ team and recently spoke as part of the Route 64 Training Tour.

PC-Lint On-Line demonstration of testing 64-bit programs (LP64).
"64-bit Test (C) Checking programs against the LP64 model."
http://www.gimpel-online.com/OnlineTesting.html

Chandra Shekar. Extend your application's reach from 32-bit to 64-bit environments. http://enterprisenetworksandservers.com/monthly/art.php?2670

Converting 32-bit Applications Into 64-bit Applications: Things to Consider. http://developers.sun.com/sunstudio/articles/ILP32toLP64Issues.html

Andrew Josey. Data Size Neutrality and 64-bit Support. http://www.unix.org/whitepapers/64bit.html

Harsha S. Adiga. Porting Linux applications to 64-bit systems. http://www 128.ibm.com/developerworks/library/l-port64.html

Transitioning C and C++ programs to the 64-bit data model. http://devresource.hp.com/drc/STK/docs/refs/64datamodel.jsp

Porting an Application to 64-bit Linux on HP Integrity Servers. http://h21007.www2.hp.com/dspp/files/unprotected/32bitto64bit_whitepaper.pdf

Stan Murawski. Beyond Windows XP: Get Ready Now for the Upcoming 64-Bit Version of Windows. http://msdn.microsoft.com/msdnmag/issues/01/11/XP64/

[MuggenHor]

Just make sure you don't abuse pointers and all should be fine.

I've seen some projects storing pointers as ints, now that can (and most likely will) get you into trouble. But as long as you make sure to store your pointers as pointers (casting a char* to an int* doesn't matter much since both still are pointers) you should be safe.

[Nils Pipenbrinck]

Just make sure you don't abuse pointers and all should be fine.

Exactly.. There are other ways to shoot into your foot as well, like guessing the size of an integer or pointer, but if you write solid code you don't do that.