> If I used to compile a Ada- built system using PowerAda, and want to
> GNAT, can there be problems? What sort of problems and can I do something
> prevent them? Its a very big system......
I experimented with porting a system comprising 20,000 files, millions of
from Apex Solaris to GNAT Solaris. Took less than 80 hours to get
to compile and link. ALmost all of these changes were due to non-portable
Apex-specific features that had been used. On several occasions, a
bug got in the way. In all but one of these cases, the bug was fixed in a
compiler provided by FTP within 24 hours. In that one case, we figured
out a way
to re-organize the code to avoid the bug. GNAT support is considerably
expensive than the $10K Stephe guessed, but it's MUCH less than Apex. At
that was the case way back then.