Compiling Ada from another directory

[rotinom <rotinom@gmail.com>]

Hey all.  I'm working with a build tool that pretty much requires me
to build from a single directory, and I'd like to place the objects in
another directory.  This has proven great with everything else, but
when it comes to Ada, I'm hitting a brick wall.

So my command lines so far are:



gcc -c -o _build/Bottles.o src/Bottles.adb
Bottles.adb:6:11: warning: file name does not match unit name, should
be "bottles.adb"
gnatbind -o _build/b~Bottles.adb _build/Bottles.ali
gnatlink -o _build/Bottles.exe _build/Bottles.ali
gnatlink: Failed to open binder output


(Yes, _build/b~Bottles.adb/ads/ali  all exist)

It would seem that I'm missing a command line switch or something
here.  Any help would be greatly appreciated.

Thanks!