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Old 04-04-07, 02:53 PM   #1
bkoz
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Join Date: Aug 2006
Posts: 4
Default Using Intel compilers

Has anyone experienced problems using Intel's compilers with OpenGL? We have seen intermittent lighting issues with both 32 and 64-bit (version 9.1) Intel compilers that we do not see with gcc.

See the attached snapshots for an example.

[IMG]ftp://services.espycorp.com/pub/good.jpg[/IMG]
Normal
[IMG]ftp://services.espycorp.com/pub/error3.jpg[/IMG]
Error

Thanks,
bkoz
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Old 04-05-07, 07:59 AM   #2
ssnyder
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Join Date: Oct 2005
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Default Re: Using Intel compilers

Quote:
Originally Posted by bkoz
Has anyone experienced problems using Intel's compilers with OpenGL? We have seen intermittent lighting issues with both 32 and 64-bit (version 9.1) Intel compilers that we do not see with gcc.

See the attached snapshots for an example.

[IMG]ftp://services.espycorp.com/pub/good.jpg[/IMG]
Normal
[IMG]ftp://services.espycorp.com/pub/error3.jpg[/IMG]
Error

Thanks,
bkoz
Try adjusting the floating-point optimization. I've seen the compiler be over-aggressive with FP code generation and fixed it by forcing precise FP code.
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