Using a Command-Line Option
You can use the -L
option to add a new
path name to the library search path. This option
alters the search path at the point the option is
encountered on the command line. For example, the
following command searches
path1
, followed by
/lib
, and finally
/usr/lib
, to find
libfoo
. The command searches
path1
and then
path2
, followed by
/lib
, and
/usr/lib
, to find
libbar
.
$ cc -o prog main.o -Lpath1 file1.c -lfoo file2.c -Lpath2 -lbar
Path names that are defined by using the
-L
option are used only by the
link-editor. These path names are not recorded in
the output file image being created. Therefore,
these path names are not available for use by the
runtime linker.
Note:
You must specify-L
if you
want the link-editor to search for libraries in
your current directory. You can use a period (.)
to represent the current directory.
You can use the -Y
option to change
the default directories searched by the link-editor.
The argument supplied with this option takes the
form of a colon separated list of directories. For
example, the following command searches for
libfoo
only in the
directories /opt/COMPILER/lib
and /home/me/lib
.
$ cc -o prog main.c -YP,/opt/COMPILER/lib:/home/me/lib -lfoo
The directories that are specified by
using the -Y
option can be
supplemented by using the -L
option.
Compiler drivers often use the -Y
option to provide compiler specific search
paths.