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Re: gnat cross-compiles ?
- From: Geert Bosch <bosch at gnat dot com>
- To: espie at nerim dot net
- Cc: gcc at gcc dot gnu dot org
- Date: Fri, 7 Jun 2002 09:26:26 -0400
- Subject: Re: gnat cross-compiles ?
On Thursday, June 6, 2002, at 09:46 , Marc Espie wrote:
On what arches does gnat currently work ?
I'd like to try to build it on openbsd architectures, I have i386
binaries... I've tried cross-building i386->sparc64, with little
success.
There is a big difference between the compiler being able to bootstrap
and being a fully working port with proper support for all Ada features.
Especially in areas such as exception handling, stack-checking,
floating-point accuracy, tasking and interrupt support every system
requires special adaptation in the run time.
Even when systems claim support POSIX-compliant multi-threading for
example, there are always areas where support is insufficient,
either due to bugs, deviations from the standards or ambiguity
in POSIX specs. Finally, even if all features work on their own,
the combination may have problems due to lack of thread safety in
the underlying C run time or bugs related to signal handling in
multi-threading programs.
So, the answer to your question really depends on what you mean with
"works". Currently Sparc/Solaris (32-bit) and i386/Linux are in best
shape, but even these are still not quite up to the level of GCC 2.8.1
based versions of GNAT. DEC Alpha, Sparc64, HP PA-RISC and PowerPC
based platforms should build.
-Geert