| NOTES FOR UNIX LIKE PLATFORMS | |
| ============================= | |
| For Unix/POSIX runtime systems on Windows, please see NOTES.WIN. | |
| Shared libraries and installation in non-standard locations | |
| ----------------------------------------------------------- | |
| Binaries on Unix variants expect to find shared libraries in standard | |
| locations, such as /usr/lib, /usr/local/lib and some other locations | |
| configured in the system (for example /etc/ld.so.conf on some systems). | |
| If the libraries are installed in non-standard locations, binaries | |
| will not find them and therefore fail to run unless they get a bit of | |
| help from a defined RPATH or RUNPATH. This can be applied by adding | |
| the appropriate linker flags to the configuration command, such as | |
| this (/usr/local/ssl was the default location for OpenSSL installation | |
| in versions before 1.1.0): | |
| $ ./config --prefix=/usr/local/ssl --openssldir=/usr/local/ssl \ | |
| -Wl,-rpath,/usr/local/ssl/lib | |
| Because the actual library location may vary further (for example on | |
| multilib installations), there is a convenience variable in Makefile | |
| that holds the exact installation directory and that can be used like | |
| this: | |
| $ ./config --prefix=/usr/local/ssl --openssldir=/usr/local/ssl \ | |
| -Wl,-rpath,'$(LIBRPATH)' |