I'm trying to fix a binary that seems to be dynamically linked to an older version of GSL (the GNU Scientific Library):
$ ldd my-binary
...
libgsl.so.23 => /usr/lib/x86_64-linux-gnu/libgsl.so.23 (0x00007fc600d51000)
...
If I use LD_PRELOAD to set a newer version, my understanding was that the older version would be replaced. Instead, I'm just seeing two instances of the same library:
$ LD_PRELOAD=/path/to/my/libgsl.so.25.0.0 ldd my-binary
...
/path/to/my/libgsl.so.25.0.0 (0xsomething)
...
libgsl.so.23 => /usr/lib/x86_64-linux-gnu/libgsl.so.23 (0x00007fc600d51000)
...
Is that going to work, or will having them both in there cause problems?