Hi Jed, Quoting Jed Brown (2013-04-09 04:47:26) > If libnotmuch.so is installed to a path that is not searched by > dlopen(3), we must import it using an absolute path because the Python > bindings do not have the luxury of RPATH linking. So strip off the > trailing directories from the install location and try CDLL with an > absolute path.
May I ask why you cannot use LD_LIBRARY_PATH? I too install libnotmuch to a non-standard location as unprivileged user and to make this library available I add its path to LD_LIBRARY_PATH. It seems to work just fine: teythoon@thinkbox ~ % python -c 'import notmuch; print("\n".join(l.strip() for l in open("/proc/self/maps") if "notmuch" in l))' 7f4214339000-7f4214357000 r-xp 00000000 00:17 2120750 /home/teythoon/.local/stow/notmuch/lib/libnotmuch.so.3.0.0 7f4214357000-7f4214557000 ---p 0001e000 00:17 2120750 /home/teythoon/.local/stow/notmuch/lib/libnotmuch.so.3.0.0 7f4214557000-7f4214559000 rw-p 0001e000 00:17 2120750 /home/teythoon/.local/stow/notmuch/lib/libnotmuch.so.3.0.0 teythoon@thinkbox ~ % python3.2 -c 'import notmuch; print("\n".join(l.strip() for l in open("/proc/self/maps") if "notmuch" in l))' 7fa5ecea4000-7fa5ecec2000 r-xp 00000000 00:17 2120750 /home/teythoon/.local/stow/notmuch/lib/libnotmuch.so.3.0.0 7fa5ecec2000-7fa5ed0c2000 ---p 0001e000 00:17 2120750 /home/teythoon/.local/stow/notmuch/lib/libnotmuch.so.3.0.0 7fa5ed0c2000-7fa5ed0c4000 rw-p 0001e000 00:17 2120750 /home/teythoon/.local/stow/notmuch/lib/libnotmuch.so.3.0.0 teythoon@thinkbox ~ % env | grep '\.local' PATH=/home/teythoon/.local/bin:/usr/local/stow/enlightenment/bin:/usr/local/bin:/usr/bin:/bin:/usr/games LOCAL=/home/teythoon/.local PYTHONPATH=/home/teythoon/.local/lib/python2.7/site-packages LD_LIBRARY_PATH=/home/teythoon/.local/lib PKG_CONFIG_PATH=/home/teythoon/.local/lib/pkgconfig teythoon@thinkbox ~ % unset LD_LIBRARY_PATH teythoon@thinkbox ~ % python -c 'import notmuch; print("\n".join(l.strip() for l in open("/proc/self/maps") if "notmuch" in l))' 7fd30b43c000-7fd30b457000 r-xp 00000000 fe:00 4241 /usr/lib/libnotmuch.so.3.0.0 7fd30b457000-7fd30b657000 ---p 0001b000 fe:00 4241 /usr/lib/libnotmuch.so.3.0.0 7fd30b657000-7fd30b658000 rw-p 0001b000 fe:00 4241 /usr/lib/libnotmuch.so.3.0.0 teythoon@thinkbox ~ % python3.2 -c 'import notmuch; print("\n".join(l.strip() for l in open("/proc/self/maps") if "notmuch" in l))' 7fadb5704000-7fadb571f000 r-xp 00000000 fe:00 4241 /usr/lib/libnotmuch.so.3.0.0 7fadb571f000-7fadb591f000 ---p 0001b000 fe:00 4241 /usr/lib/libnotmuch.so.3.0.0 7fadb591f000-7fadb5920000 rw-p 0001b000 fe:00 4241 /usr/lib/libnotmuch.so.3.0.0 > --- > This is sort of a hack, but I don't know a less intrusive way to get > libnotmuch.so from somewhere dlopen(3) doesn't already search. > > The absolute path version won't do the right thing in case of 'setup.py > develop', otherwise we could use it in all cases. It may still make > sense to make the absolute path version take precedence. Well, if something like this is necessary and wanted (opinions anyone?) at least let's not hardcode the assumption about the directory layout but just walk up the tree until we find notmuch.so.3 or lib/notmuch.so.3. This way the bindings will find the correct library even when they are included directly from within the source tree. Otoh, adding such behavior might be 'surprising' and lead to many problems down the road like spurious bug reports just because the magic library finder locates a rogue libnotmuch.so.3 somewhere. > An alternative would be to find libnotmuch.so using the notmuch > executable. How would you do that? fork'ing and exec'ing is not an option (and I'm not sure what one could achieve by exec'ing it, but how else would you talk to the dynamic linker?) , and poking around in binaries to get their rpath isn't either in my opinion. And you would have to locate the 'right' binary in the first place? Cheers, Justus _______________________________________________ notmuch mailing list notmuch@notmuchmail.org http://notmuchmail.org/mailman/listinfo/notmuch