On Fri, Nov 10, 2017 at 04:52:43PM -0500, Elle Stone wrote: > On 11/10/2017 02:42 PM, Carol Spears wrote: > > After a couple of catastrophes, I reinstalled my operating system ... and > > eventually rebuilt gimp. > > > > The gcc-7 gimp failed to open with a > > gimp: symbol lookup error: gimp: undefined symbol: > > gimp_convert_dither_type_compat_get_type > > > > The gcc-6 gimp works fine. > > > > Were my problems related to gcc-7? > > In case it might be relevant, this bug indicates a problem specifically with > gcc-7.2: > > https://bugzilla.gnome.org/show_bug.cgi?id=787222#c5 > > Best, > Elle > I can't comment on that specific bug (I haven't converted anything to 16-bit float), but I've used gcc-7.2.0 to build both 2.9.6 and 2.8.22 on different machines without any problems (both using gegl-0.3.20, 2.8.22 modified as in BLFS to do that) and both appear to work, they certainly start OK. My impression of symbol lookup errors (after a quick google) is that they are caused by mismatched versions of libraries. In one thread at an opensuse forum (for that same symbol) the problem was apparently caused by getting binaries from a differnt repo, and soembody had to also get libgimp (they separate it!), lcms, babl, and gegl from the other repo. But if by 'rebuilding' Carol meant "recompiled on the same machine" I have no idea. Her post implies that both gcc-6 and gcc-7 versions are on the same machine, which seems an uncommon approach (assuming both are the same version and this isn't just to test for gcc regressions). But I haven't tried building applications with a newer version of gcc on a system built with an older gcc for many years, perhaps I'm overlooking something (e.g. changed calling conventions in the newer C++ standard). Looking at my 2.9 version, the symbol is in both libgimp-2.0.so and libgimpbase-2.0.so, but not in any of the modules. So I suppose the way in is to use ldd to look at what those libs link to (and to check that the gcc-7 versions are being used). ĸen -- Truth, in front of her huge walk-in wardrobe, selected black leather boots with stiletto heels for such a barefaced truth. - Unseen Academicals _______________________________________________ gimp-developer-list mailing list List address: gimp-developer-list@xxxxxxxxx List membership: https://mail.gnome.org/mailman/listinfo/gimp-developer-list List archives: https://mail.gnome.org/archives/gimp-developer-list
