gnat build fails

[Nathan Sidwell]

why is that a make in the toplevel i686-pc-linux-gnu succeeds, but one
in i686-pc-linux-gnu/gcc fails with

rm -f stamp-gnatlib2 stamp-tools
gnatbind -C -I- -I. -Iada -I../../gcc/gcc/ada -o ada/b_gnatb.c ada/gnatbind.ali
fatal error: file gnatbind.ali is incorrectly formatted
make sure you are using consistent versions of gcc/gnatbind
10.  R nnvvnnnnnnnnnvvvnnvnvvvnnnnnnnnvnvnnnnnnnnnvnnnnvvnn
                                                      |
make: *** [ada/b_gnatb.c] Error 4


nathan
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