On Wed, 26.02.14 20:54, Thomas H.P. Andersen (pho...@gmail.com) wrote: > The todo says: > "something pulls in pcre as shared object dependency into our daemons > such as hostnamed" > > Normal buiild: > ldd ./systemd-hostnamed > linux-vdso.so.1 => (0x00007fff247bc000) > libselinux.so.1 => /lib64/libselinux.so.1 (0x00007f7ec47f7000) > librt.so.1 => /lib64/librt.so.1 (0x00007f7ec45ef000) > libdl.so.2 => /lib64/libdl.so.2 (0x00007f7ec43ea000) > libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f7ec41cd000) > libc.so.6 => /lib64/libc.so.6 (0x00007f7ec3e0e000) > /lib64/ld-linux-x86-64.so.2 (0x00007f7ec4a2f000) > libpcre.so.1 => /lib64/libpcre.so.1 (0x00007f7ec3ba7000) > liblzma.so.5 => /lib64/liblzma.so.5 (0x00007f7ec3982000) > > > With --disable-selinux: > $ ldd ./systemd-hostnamed > linux-vdso.so.1 => (0x00007fff1a651000) > librt.so.1 => /lib64/librt.so.1 (0x00007f1c058d0000) > libdl.so.2 => /lib64/libdl.so.2 (0x00007f1c056cc000) > libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f1c054ae000) > libc.so.6 => /lib64/libc.so.6 (0x00007f1c050ef000) > /lib64/ld-linux-x86-64.so.2 (0x00007f1c05aec000) > > Not sure what to do about that though...
For some reason linking to libselinux has the result that libpcre is pulled in as direct dependency, too. i.e. for some reason libselinux seems to enforce ld's --copy-dt-needed-entries option when linking to it. I have the suspicion this is caused because libselinux uses gcc constructors/_init. Which is a pretty poor choice, of course, libselinux really shouldn't use gcc constructors. In fact, nobody should ever use gcc constructors... Also, if a library has gcc constructors it makes --as-needed useless on it, apparently. It's quite understandable: after all dropping the libs would result in different code to be executed, since just loading the libs already results in code execution in the library. So in order not to change behaviour ld exclude libraries with constructors from --as-needed... Lennart -- Lennart Poettering, Red Hat _______________________________________________ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
