Which GCC compiler for Linux-GNAT

[Bernard WEISSER <bernard.weisser@wanadoo.fr>]

Hello everybody,

Until now, I used GNAT 3.15 compiler built on top of a GCC 2.8.1 
compiler and all was perfect for me, except that I has to use this GCC 
2.8.1 compiler for all my regular C sources (in fact not a really a 
problem). I got that GNAT distribution from the FTP 'cs.nyu.edu' server.

With the arrival of the new LINUX Slackware 9.0 release, it appeared to 
me that now a full bunch of compilers is provided (and ready to use), 
namely : C, C++, F77 and GNAT 3.15. All these front-ends are based on 
the unique GCC 3.2.2 compiler version. Using this new GNAT version, I 
succeded to compile a rather complex Ada application, but it turned out 
that the binary run quickly ended with a CONSTRAINT_ERROR.

Does anybody know which GCC compiler is the "official one" required to 
build the GNAT 3.15 compiler ? Are there 2 different teams working on 
the GNAT development and using 2 different GCC compiler ?

Thank you to everybody able to explain that to me.