I am playing with Ubuntu libraries. I am trying to add some libraries to /usr/lib/<subdir>/ and to create some proxies for the libraries in /usr/lib/<subdir>/.
Note that /usr/lib/<subdir>/ exists in one of the files in /etc/ld.so.cond.d/.
Unfortunately, ldconf behaviour seems to be very weird and
non-trivial for me. And that's why:
When I add some library to /usr/lib/<subdir>/ it is not detected until I add a symbolic link to it from /usr/lib. Why?
I found out that often libraries are placed in /usr/lib/<subdir>/ in a form of triplets:
/usr/lib/<subdir>/lib<libname>.so- symbolic link tolib<libname>.so.1/usr/lib/<subdir>/lib<libname>.so.1- symbolic link tolib<libname>.so.<version>/usr/lib/<subdir>/lib<libname>.so.<version>- the actual library
Ok. To create a proxy I decided to remove symbolic links and to add my own, say:
/usr/lib/<subdir>/lib<libname>abc.so- symbolic link tolib<libname>abc.so.1/usr/lib/<subdir>/lib<libname>abc.so.1- symbolic link tolib<libname>.so.<version>
And then suddenly when I run sudo ldconfig to update this stuff it creates /usr/lib/<subdir>/lib<libname>.so.1 which points to /usr/lib/<subdir>/lib<libname>abc.so.1.. Why?
I can't get the logic at all.
