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2.2 Build requirements

GNU tar is required to unpack PolyORB source packages.

Ada compiler:

For builds for cross targets, both a native and a cross compiler are required, as some tools (like an IDL-to-Ada compiler) are meant for use on the build host.

Optional:

Note: per construction, the macro configure used to find your GNAT compiler looks first for the executable gnatgcc, then adagcc and finally gcc to find out which Ada compiler to use. You should be very careful with your path and executables if you have multiple GNAT versions installed. See the explanation below on the ADA environment variable if you need to override the default guess.