renaming kde-config to kde4-config

[David Faure]

On Tuesday 27 June 2006 11:21, David Faure wrote:
> Actually my idea was: we could support installing kdelibs3 and kdelibs4 into the same
> prefix, if we move most helper binaries to libexec/kde4.

I discovered a problem with that: the kdeinit module.
Even if I move kde4's kbuildsycoca to <kde4prefix>/lib/kde4/libexec, I end up with:
both /usr/bin/kbuildsycoca (from kde3) and <kde4prefix>/lib/kde4/libexec/kbuildsycoca linking to a "libkdeinit_kbuildsycoca.so"
so even with different prefixes, the kde3 kbuildsycoca (called by a kde3 program) ends up running the kde4 code 
from <kde4prefix>/lib/libkdeinit_kbuildsycoca.so since it's found first (due to LD_LIBRARY_PATH).
(I guess we can't just rely on RPATH at this point, for full portability).

With the kdeinit-module naming scheme I can't just rename the kdeinit module, it has to be found as libkdeinit_appname,
otherwise kdeinit won't be able to dlopen the module.

If I rename the binary and the kdeinit module to kbuildsycoca4, then moving it to libexec was a bit pointless,
the binary might as well remain in bin. But I wanted to clean up bin from internal tools (ok kbuildsycoca isn't
so internal, since we sometimes suggest to run it, but the problem will remain for other tools).

Another option is to start versioning the kdeinit modules - but making sure we don't install a .so symlink so
that both can be installed in the same prefix.... Sounds difficult and unportable (dlls).

And finally, another option is to version inside the name itself, i.e. change the kdeinit naming scheme 
so that kde4_add_kdeinit_executable( kbuildsycoca ...)
actually defines a kbuildsycoca binary linking to a libkdeinit_kbuildsycoca4.so - i.e. adding a '4' automatically.
But then all our CMakeLists.txt code like 
 target_link_libraries(kdeinit_kbuildsycoca  [some libs] )
must be adjusted to
 target_link_libraries(kdeinit_kbuildsycoca4  [some libs] )
Unless this can benefit from some cmake magic where the target name differs from the actual library name on disk?

Maybe I should just drop the idea of making kbuildsycoca (and other such tools) kdeinit modules,
since the gain is reportedly not that much nowadays.

David - undecided ;)

-- 
David Faure, faure at kde.org, sponsored by Trolltech to work on KDE,
Konqueror (http://www.konqueror.org), and KOffice (http://www.koffice.org).