Redirect Error Messages Output To File

[Andi Hellmund]

Hi,
> Hi,
>
> Is it possible to redirect the error messages gcc generates to a file and
> not to the console?
> And if yes, how do I do it ?
> (tried g++ main.cpp>  out.txt, but this just creates an empty file)
>
> Thank you.
>    

this question is not specific to gcc, but to any Linux/UNIX environment. 
The error messages are printed to 'stderr' and not 'stdout'. Assuming 
BASH, you could redirect the error messages by

g++ main.cpp > out.txt 2> err.txt

 > redirects 'stdout'
2> redirects 'stderr'

Andi