optimization/10772: Result differences between debug and optmize libs on linux; and with sol/nt on optimize mode

[omar beo]

Hi,
I tried your suggestion, and build the libs using " -ffloat-store " flag.
It is true that now "Optimized and debug compilations give the same result 
on Linux".
But this did not answer the original question, why IÂ’m not getting the same 
results in the other platforms?

If you run the test I provided, you will see that the result should be 
00005975 in every case, but it is not when i run on linux. Why?

If you are getting the same number in every case, could you please send me 
the compilation arguments you used?

The results of the test:
Linux: debug or optimize libs
var_1: 00005975
var_2: 00005974  ...... * should be 00005974
var_3: 00005975
var_4: 00005974  .........* should be 00005974
var_5: 00005975

While sol debug or optimize give:
var_1: 00005975
var_2: 00005975
var_3: 00005975
var_4: 00005975
var_5: 00005975


>From: bangerth@dealii.org
>Reply-To: bangerth@dealii.org, gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org,  
>nobody@gcc.gnu.org, omarbeo@hotmail.com, gcc-gnats@gcc.gnu.org
>To: gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org, nobody@gcc.gnu.org,  
>omarbeo@hotmail.com
>Subject: Re: optimization/10772: Result differences between debug and 
>optmize libs on linux; and with sol/nt on optimize mode
>Date: 14 May 2003 15:14:49 -0000
>
>Synopsis: Result differences between debug and optmize libs on linux; and 
>with sol/nt on optimize mode
>
>State-Changed-From-To: feedback->closed
>State-Changed-By: bangerth
>State-Changed-When: Wed May 14 15:14:48 2003
>State-Changed-Why:
>     Not a bug. Optimized and debug compilations give the same
>     result is -ffloat-store is used. On NT, a similar accuracy
>     truncation mechanism is used by default. On Solaris, all
>     accuracy is 64bit.
>
>     W.
>
>http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=10772

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