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Errors when building GNAT

Help,

I get the following error messeges when trying to build gnat as a
cross-compiler, i.e.
# GCC was configured as follows:
./configure --target=m68k-embedded-coff --with-gnu-as --with-gnu-ld
--prefix=/us
r/local/crossgcc
echo host=i486-unknown-linux target=m68k-embedded-coff
build=i486-unknown-linux

and the following make command line:

make CFLAGS="-O3 -fomit-frame-pointer" 

That went ok

Then,

make CFLAGS="-O3 -fomit-frame-pointer" gnatboot

and got many error messeges like:

as: unrecognized option '-c68020'

Help and comments about building cross-gnat for MC68000 appreciated.

Regards,

P. Kahler

Philip Kahler
Lead Engineer, LRU OFP Support Tools
Military Transport Aircraft
McDonnell Douglas Corporation