Yuriy Rusinov wrote: > I have to put some C-language functions onto postgresql server 9.2. These functions are used GSL > software library http://www.gnu.org/software/gsl/. In Makefile for these functions I wrote LD_FLAGS = > ... -lgsl, On some source-based Linux distributions such as gentoo linux these functions successfully > installed onto server, but on rpm-based distributions such as fedora and others does not. gsl library > has to be compiled from sources, because some specific distributions does not have this one and rpm- > installation of this library does not allowed. Error message is "error <mylibrary>.so cannot load > libgsl.so.0 no such file" despite of gsl library was installed onto /usr/local, library files are > installed into /usr/local/lib. Where is the problem in postgresql or distribution ?
Read "man ld", the description of "search paths to locate required shared libraries".
/usr/local/lib is not automatically searched. I would either install the library in /usr/lib, link the shared object with -Wl,-rpath,/usr/local/lib or put /usr/local/lib into /etc/ld.so.conf and run ldconfig.