Compiler Upgrade : Need to verify exe results ?

[Rudy__Delcroit]

Hi experts,

I'm planning to upgrade our fortran compiler from Intel Fortran Version 11.1.060 to the latest available. 

I will keep the same compilation flags. 

Is there a risk that the results of my software are different ? In other word, do I need to validate my software ? 

I've more than 100 small programs and this might take me a lot of time. 

I also have the same question if I move from 32bit to 64bits.

Thank you,

Vincent

[andrew_4619]

The short answer is yes.I would expect to have to validate. that is an old compiler and:

1] The current compiler will have more checks and might throw compile errors by exposing bugs that exist in your code that were previously undetected.

2] Sometimes the default compiler behaviour changes. You should read the release notes which will advise, however in your case that would be several sets of release notes, 

3] When things have been changed it is always wise to do some validation. We never plan bugs, they are by there nature behaviour we did not expect!

[Steven_L_Intel1]

Have a look through the attached presentation.443546