c++ - gcc/ld: what is to -Wl,-rpath in dynamic linking what -l is to -L in static linking? -

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with /my/dir/path/foo.a , /my/dir/path/bar.a:

to statically link using gcc/g++, 1 uses -l specify directory containing static libraries , -l specify name of library. in case 1 write gcc -l/my/dir/path -lfoo -lbar ....

with /my/dir/path/foo.so , /my/dir/path/bar.so:

to dynamically link using gcc/g++, 1 uses -wl,-rpath,/my/dir/path. how names of libraries specified? command gcc -l/my/dir/path -wl,-rpath,/my/dir/path -lfoo -lbar ... correct? or should gcc -l/my/dir/path -wl,-rpath,/my/dir/path -wl,-lfoo -wl,-lbar ...? in other words, library names need passed on linker through -wl,-l?

the -l argument works both static , shared libraries expects filename of specified library in specific format. namely, -lfoo tells linker file named libfoo.a or libfoo.so. if want links against library filename don't have 'lib' prefix (i. e. foo.so), can use semicolon , specify filename: -l:foo.so.

so, dynamically link against /my/dir/path/foo.so , /my/dir/path/bar.so need issue following command:

g++ -l/my/dir/path/ -l:foo.so -l:bar.so

as -rpath, has -rpath=<path> format, in order pass linked need issue following:

g++ -l/my/dir/path/ -wl,-rpath=/my/dir/path/ -l:foo.so -l:bar.so

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