On Sat, Jun 13, 2015 at 11:51:17AM +0200, Sven Joachim wrote: > Source: ncurses > Version: 5.9+20150516-2 > Severity: wishlist > Control: block 230990 by -1 > > For about half a year ncurses has a "--with-versioned-syms" configure > option that enables symbol versioning. We should use this option in the > upcoming ncurses 6.0 release and rebuild all reverse dependencies before > the Stretch release so that we can switch to the new ABI afterwards. > > When using this option, quite a lot of internal symbols which are not > part of the API are no longer exported, see the attached list. > Fortunately according to codesearch.debian.net, very few packages seem > to use any of those symbols: > > - fpc, in fpcsrc/packages/ncurses/src/form.pp, apparently declares > _nc_Default_Form and _nc_Default_Field. Probably nobody really uses > those, but I don't really have a clue of Pascal.
Probably no one does... A web search for these with "pascal" shows only this bug report. Because of that, I'm inclined to recommend that Debian drop those symbols from its package for fpc. If there is some existing package which does use the symbols, we can address that. > - cmake has a lot of hits since it includes a very outdated copy of the > form library which is apparently unused. The /usr/bin/ccmake binary > from the cmake-curses-gui package is linked with the system form > library and does not use any private symbols from it. If some package relies on tweaked sources from ncurses, it's their responsibility to address any resulting problems. The form-library here is dated 1998. > - libncursesada and haskell_ncurses declare _nc_has_mouse, but only if > NCURSES_VERSION_PATCH < 20081122. Prior to that date, _nc_has_mouse > was actually part of the API so its removal might break some old > programs. This might be a case where the symbol should actually be > exported in order not to break the ABI. To put it in context, the threshold date is right after ncurses 5.7, which is a matter of concern for Debian 6... -- Thomas E. Dickey <[email protected]> http://invisible-island.net ftp://invisible-island.net
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