Don't mean to nag, but is there any news on this? regards, Markus
Markus Hoenicka writes: > Jeremy Chadwick writes: > > As promised: http://www.malkavian.com/~jdc/myprog.tar.gz > > > > This test program indeed works as expected. However, this doesn't > quite reflect the situation in libdbi. I took your files and modified > them accordingly, see: > > http://libdbi.sourceforge.net/downloads/dlsymtest.tar.gz > > To run the test use: > > LD_LIBRARY_PATH=. ./myprog > > We need to set the environment variable to let the linker pick up a > shared object that gmake builds. > > myprog.c now just calls a function which is provided in libmylib > (built from mylib.c). The latter file does most of what your test case > did in myprog.c. The second major change is that myshared.so is linked > against libmysqlclient (just like a libdbi database driver is linked > against the client library). myfunc now calls a MySQL function to show > that it is accessible (if you don't have libmysqlclient handy, you can > replace it with whatever function from some .so is convenient) > > Finally, libmylib tries to obtain a pointer to that MySQL function by > means of a dlsym call. This new dlsym call, in contrast to the existing > one that acesses myfunc in myshared.so, indeed fails: > > myint = 0xdeadbeef (3735928559) > ==> entered myfunc() > ==> double = 3.141590 > ==>mysql client version is 50051 > ==> exiting myfunc() > dlsym() in shared lib failed: Undefined symbol > "mysql_get_client_version" > > So, to make the problem clear again: while dlsym works when accessing > symbols in dlopen()ed objects, it fails to access symbols which are > linked into such an object if you use the handle returned by > dlopen(). This is different from other OSes. > > regards, > Markus > > > -- > Markus Hoenicka > [EMAIL PROTECTED] > (Spam-protected email: replace the quadrupeds with "mhoenicka") > http://www.mhoenicka.de > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "[EMAIL PROTECTED]" -- Markus Hoenicka [EMAIL PROTECTED] (Spam-protected email: replace the quadrupeds with "mhoenicka") http://www.mhoenicka.de _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
