On Sunday 2016-07-10 12:46, Emil Velikov wrote: >> PKG_CHECK_EXISTS([gtk-3.0], [PKG_CHECK_MODULES([gtk], [gtk-3.0])], [ >> ...repeat the fun... >> ])] >> >Yes, it's one line of fun for each version that you want to be >compatible with. It's not ideal, but it's a price to pay, for keeping >things compatible/sane.
Without pkgconfig supporting some new alias tag (hint, hint) to cover such a case, I predict that whoever uses libfoo-LotsANumbersHere limits themselves to 3 or maybe 4 PKG_CHECK_MODULES calls, because it is looking real silly. >> The .so symlink is really only for /usr/bin/ld. It does not >> play a role for ld.so (ld-linux.so.*) and therefore won't >> interfere with plugins living in versioned directories. >> (Cf. libmirage from cdemu) >> >The (main?) problem [...] is that we [...] rely on libfoo.so being >correct. >I get the feeling that you have not read the following >http://ometer.com/parallel.html. I would strongly recommend giving it >a look. I read it now, and I do not buy it - at least not for 2016 standards. According to the page, it was written in 2002, and I can confirm that the situation was much worse then it is now. I can practically refute all his points from the "Some more issues:" section, but for brevity, I spare you the details for now. >> Or you can just have two lines in configure.ac next to each other >> which will scream at you "update me in lockstep" everytime you look >> at them because you modify one of them. >> >> AC_INIT([libweston], [1.12.0]) >> libweston_SONUM=3 >> -> >> AC_INIT([libweston], [1.12.90]) >> libweston_SONUM=27 >> >This could also work, but Pekka's idea sounds more robust and simpler >in the long run. Add the logic once and don't bother checking/keeping >things in sync ;-) Feels wrong to pollute configure.ac with code that tries to be "smart" but is foremost disproportional in size to the problem. (And you wonder why people hate $build_system_du_jour.) Would a commit hook not be better to run a check that SONUM is in good shape w.r.t. VERSION? _______________________________________________ wayland-devel mailing list wayland-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/wayland-devel
