Hi, Since nobody objected on your suggestion, I just committed it. CreateRootlessEnvironment now adds some standard Unix paths to PKG_CONFIG_PATH.
-- Hisham On 9/16/07, mpb <[EMAIL PROTECTED]> wrote: > Hi gobolinux-devel, > > I recently submitted a bug report regarding PKG_CONFIG_PATH in > Rootless. I'm forwarding the bug report to the devel list to > facilitate greater discussion. > > You can see the original bug report here: > > http://bugs.gobolinux.org/view.php?id=144 > > > I think Rootless can set PKG_CONFIG_PATH to a more useful value than > it currently does. > > At present, Rootless (in StartRootless) sets PKG_CONFIG_PATH to: > > export > PKG_CONFIG_PATH=${goboPrefix}/System/Links/Libraries/pkgconfig${PKG_CONF\ > IG_PATH:+:$PKG_CONFIG_PATH} > > This is correct as long as Pkgconfig is not installed inside Rootless. > > If you install Pkgconfig inside of Rootless, you start to run into > problems. StartRootless (in Pkgconfig's Environment file) will now > overwrite (and forget) any previous value of PKG_CONFIG_PATH with: > > export PKG_CONFIG_PATH=$goboLibraries/pkgconfig > > StartRootless will then prepend > ${goboPrefix}/System/Links/Libraries/pkgconfig to PKG_CONFIG_PATH as > above. > > The result? (On my system:) > > PKG_CONFIG_PATH=\ > /home/gobo/System/Links/Libraries/pkgconfig:\ > /home/gobo/System/Links/Libraries/pkgconfig > > Not only is this redundant, but .pc files provided by the host system > will no longer be found! > > According to 'man pkg-config': > > PKG_CONFIG_PATH > A colon-separated (on Windows, semicolon-separated) list of > directories to search for .pc files. The default directory will > always be searched after searching the path; the default is lib- > dir/pkgconfig:datadir/pkgconfig where libdir is the libdir where > pkg-config and datadir is the datadir where pkg-config was > installed. > > Pkgconfig (inside Rootless) was installed to (in my case) > PREFIX=/home/gobo/Programs/Pkgconfig/<version>. This means Pkgconfig > will not search the host system's default directories for .pc files. > According to strace, on my system the default directories are: > > /usr/local/lib/pkgconfig > /usr/local/lib/pkgconfig/i486-linux-gnu > /usr/local/share/pkgconfig > /usr/lib/pkgconfig > /usr/lib/pkgconfig/i486-linux-gnu > /usr/share/pkgconfig > > So, when I try to use Rootless (on Ubuntu) to compile and install a > recent version of GNU Backgammon (for instance), Pkgconfig will not be > able to find the many Ubuntu installed development files that GNU > Backgammon depends on. (Unless, of course, I manually fix the broken > PKG_CONFIG_PATH.) > > My initial proposal for fixing this problem was to update > Pkgconfig's Environment file so that it would be Rootless aware. (My > proposed Envirnoment file is attached to the bug report, if you care > to see it.) > > Hisham was hesitant to accept my proposal as there are other > Programs that might similarly benefit from Rootless-speciaized > Environments, so potentially many Recipes might become more complex. > > I then proposed (in the bug report, and now here) that, if you don't > want to make the Recipes more complicated, you could achieve the same > effect by setting PKG_CONFIG_PATH correctly inside StartRootless > itself. This would centralize all the Rootless specialized behavior > in one location, and, moreover, that location that would not interfere > with GoboLinux proper. > > This is a little tricky, but very possible. If the directory > Programs/Pkgconfig exists, StartRootless simply has to remember the > original value of PKG_CONFIG_PATH and then allow Pkgconfig's > Environment file to clobber PKG_CONFIG_PATH. Finally, StartRootless > would reset PKG_CONFIG_PATH to a correct value. A correct value would > be something like: > > export PKG_CONFIG_PATH=\ > ${goboPrefix}/System/Links/Libraries/pkgconfig:\ > ${ORIGINAL_PKG_CONFIG_PATH:+$ORIGINAL_PKG_CONFIG_PATH:}\ > /usr/local/lib/pkgconfig:\ > /usr/local/share/pkgconfig:\ > /usr/lib/pkgconfig:\ > /usr/share/pkgconfig > > In the above, I am making a reasonable guess as to what the default > directories will be for the host system's pkg-config. If there is a > better way of determining the host system's default directories, I'm > all for using it. I just don't know what it might be. > > So, to summarize, I'm proposing that Rootless be improved to > automatically facilitate the Compiling of Programs against development > libraries provided by the host system via the pkg-config mechanism of > library detection. > > Thanks! > > -mpb > _______________________________________________ > gobolinux-devel mailing list > gobolinux-devel@lists.gobolinux.org > http://lists.gobolinux.org/mailman/listinfo/gobolinux-devel > _______________________________________________ gobolinux-devel mailing list gobolinux-devel@lists.gobolinux.org http://lists.gobolinux.org/mailman/listinfo/gobolinux-devel
