What I usually do is to make a symbolic link that has the name of the desired (older) version of the .so, and make it point to the current (newer) version of the .so e.g. if I have a program that requires an older version of library x, say libx.so.1, while I have on my system only a newer version, say libx.so.2, I do the following: $ll -rw-rw-rw- 1 vanrensb users 0 Dec 31 10:24 libX.so.2 $ln -s libx.so.2 libx.so.1 $ll -rw-rw-rw- 1 vanrensb users 0 Dec 31 10:24 libx.so.2 lrwxrwxrwx 1 vanrensb users 9 Dec 31 10:26 libx.so.1 -> libx.so.2 This usually works because the libraries are backwards compatible, i.e. they add new stuff in the later versions but they don't remove the existing functions inside the library. * Your old program should run OK because the symlink makes it think that it is linking to the older version of the .so. * Your new programs should automatically link to the current (newer) version of the .so because your compiler/linker is aware of the correct library version that it needs. Hope this helps. Lourens... -----Original Message----- From: gcc-help-owner@xxxxxxxxxxx [mailto:gcc-help-owner@xxxxxxxxxxx] On Behalf Of Matthias David Siebler Sent: 30 December 2004 01:19 To: gcc-help@xxxxxxxxxxx Subject: Question about linking multiple copies of the same library Hello: i have a question about how to link multiple copies of the same library. I have a existing application with needs to include a thirdparty library. (For this library source is not available) This is a dynamically linked library that requires libstdc++-libc6.1-2.so.3 My current application uses a newer compiler which requires libstdc++-libc6.2-2.so.3 Is it possible to link the application such that the IBM library links to the old libstdc++ and everything else resolves to the new library? How can this be done? Thanks __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
