The runtime linker replaces the string token $ISALIST when used in a runpath (DT_RUNPATH or DT_RPATH), filter (DT_FILTER), or auxiliary filter (DT_AUXILIARY):
$ISALIST – Expands to the native instruction sets executable on this platform (see the isalist(1) map page). A path name containing this token is replicated for each instruction set available. For more details of this token expansion, see “Instruction Set Specific Shared Objects”.
The runtime linker replaces the following string tokens when used in the paths specified above or in dependency (DT_NEEDED) entries:
$ORIGIN – Provides the directory the object was loaded from. This token is typical used for locating dependencies in unbundled packages. For more details of this token expansion, see “Locating Associated Dependencies”.
$PLATFORM – Expands to the processor type of the current machine (see the uname(1) man page description of the -i option). For more details of this token expansion, see “System Specific Shared Objects”.