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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: GNAT gcc flag for generating xref info?
Date: Thu, 04 Jun 2020 17:43:59 +0100
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Xref: reader01.eternal-september.org comp.lang.ada:58958
Date: 2020-06-04T17:43:59+01:00
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Stephen Leake <stephen_leake@stephe-leake.org> writes:

> There used to be a flag -fdumpxref for the GNAT gcc C compiler that
> output .gli files, which gnatcoll.xref parsed just as it does .ali
> files for Ada code.
>
> But that is apparently gone; 
>
> gcc.exe: error: unrecognized command line option '-fdumpxref'
>
> gnat/.../cc1.exe --help shows a flag -fxref, but that is also gone:
>
> gcc.exe: warning: switch '-fxref' is no longer supported
>
> So how do I use gnatcoll.xref with C code?

You would have thought, given the maturity of GCC ( :-) ) that the
ChangeLogs would contain some references to these switches. The only one
I can see is that references to -fdump-xref in the Ada documentation
were removed (because the switch was deprecated) in December 2017.

The current GNAT Studio documentation says that the gnatinspect
cross-reference database is deprecated.

So I guess they're now using libadalang (and a putative libclang???) but
since GNAT Studio isn't provided in the Mac CE 2020 pack and the 2019
version works fine on the rare occasions I need it I can't comment
further.