This is the mail archive of the cygwin mailing list for the Cygwin project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: G++ 4.3.4 (with Cygwin 1.7) vs.G++ 4.5.2 (with MinGW) ???


On 6/13/2011 2:46 AM, Jan Chludzinski wrote:
Just finished compiling some numerical code (developed using the
Borland C++ compiler) using G++ 4.3.4 (that came with Cygwin 1.7).
The answers are different from what I get using the Borland compiler
(circa 2002).  I have known correct answers from some NASA code and
compare against those.

I've transitioned of late to Code::Blocks using the latest MinGW.
MinGW comes with G++ 4.5.2.  I compiled using this compiler and it
once again it works (I get the same answers as the NASA code).

Are there known problems with G++ 4.3.4?

BTW, the original code was infinite looping until I replaced the old style:

for (i=0; i<WHATEVER; i++) ..

with i declared within the routine (i.e., function) with:

for (int i=0; i<WHATEVER; i++) ...

Try turning off optimizations or at least drop back to -O3.



-- Larry

_____________________________________________________________________

A: Yes.
> Q: Are you sure?
>> A: Because it reverses the logical flow of conversation.
>>> Q: Why is top posting annoying in email?

--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]