Re: toolchain's output depends on toolchain used to build the compiler?

[Shachar Shemesh]

ronys wrote:
Hi Shachar,
 
Interesting problem. Here are some thoughts:
 
Can you control the level of optimization used by the customer? Does 
-O0 create identical object code?

Havn't tested yet, but my gut feeling is "yes".
What are the differences in code? Perhaps they're related to the 
different paths? (If the lengths of the paths are different, and 
they're stored somewhere in the object code, that'll change the results)
The question is why should identical source code produce different paths 
when compiled with the same compiler?
 
You might also want to compare the assembly-language output (-S) to 
narrow down the problem.
-d is better, as it does not overlay the source. If you read what I 
wrote - that was what I was doing.
 
If the customer needs cygwin for internal use, I'd suggest using a 
virtualization solution such as VirtualBox instead - the integration 
with Windows is quite impressive.
At this point in time, it will have to remain a dual environment.

Shachar

--
Shachar Shemesh
Lingnu Open Source Consulting Ltd.
http://www.lingnu.com

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