4.3.2 LD_LIBRARY_PATH Environment Variable

Use the LD_LIBRARY_PATH environment variable to specify directory paths that the linker should search for libraries specified with the -llibrary option.

Multiple directories can be specified, separated by a colon. Typically, the LD_LIBRARY_PATH variable contains two lists of colon-separated directories separated by a semicolon:

dirlist1;dirlist2

The directories in dirlist1 are searched first, followed by any explicit -Ldir directories specified on the command line, followed by dirlist2 and the standard directories.

That is, if the compiler is called with any number of occurrences of -L, as in:

f95 ... -Lpath1 ... -Lpathn ...

then the search order is:

dirlist1 path1 ... pathn dirlist2 standard_paths

When the LD_LIBRARY_PATH variable contains only one colon-separated list of directories, it is interpreted as dirlist2.

In the Solaris operating environment, a similar environment variable, LD_LIBRARY_PATH_64 can be used to override LD_LIBRARY_PATH when searching for 64-bit dependencies. See the Solaris Linker and Libraries Guide and the ld(1) man page for details.

• On a 32-bit SPARC processor, LD_LIBRARY_PATH_64 is ignored.

• If only LD_LIBRARY_PATH is defined, it is used for both 32-bit and 64-bit linking.

• If both LD_LIBRARY_PATH and LD_LIBRARY_PATH_64 are defined, 32-bit linking will be done using LD_LIBRARY_PATH, and 64-bit linking with LD_LIBRARY_PATH_64.

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  Note –

  Use of the LD_LIBRARY_PATH environment variable with production software is strongly discouraged. Although useful as a temporary mechanism for influencing the runtime linker’s search path, any dynamic executable that can reference this environment variable will have its search paths altered. You might see unexpected results or a degradation in performance.

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