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1 | ||
2 | NOTES FOR UNIX LIKE PLATFORMS | |
3 | ============================= | |
4 | ||
5 | For Unix/POSIX runtime systems on Windows, please see NOTES.WIN. | |
6 | ||
7 | ||
8 | Shared libraries and installation in non-standard locations | |
9 | ----------------------------------------------------------- | |
10 | ||
11 | Binaries on Unix variants expect to find shared libraries in standard | |
12 | locations, such as /usr/lib, /usr/local/lib and some other locations | |
13 | configured in the system (for example /etc/ld.so.conf on some systems). | |
14 | If the libraries are installed in non-standard locations, binaries | |
15 | will not find them and therefore fail to run unless they get a bit of | |
16 | help from a defined RPATH or RUNPATH. This can be applied by adding | |
17 | the appropriate linker flags to the configuration command, such as | |
18 | this (/usr/local/ssl was the default location for OpenSSL installation | |
19 | in versions before 1.1.0): | |
20 | ||
21 | $ ./config --prefix=/usr/local/ssl --openssldir=/usr/local/ssl \ | |
22 | -Wl,-rpath,/usr/local/ssl/lib | |
23 | ||
24 | Because the actual library location may vary further (for example on | |
25 | multilib installations), there is a convenience variable in Makefile | |
26 | that holds the exact installation directory and that can be used like | |
27 | this: | |
28 | ||
29 | $ ./config --prefix=/usr/local/ssl --openssldir=/usr/local/ssl \ | |
30 | -Wl,-rpath,'$(LIBRPATH)' |