* ld.h (args_type): Add field rpath.

	* ld.h (args_type): Add field rpath.
	* lexsup.c (S_ISDIR): Define if not already defined.
	(parse_args): Add support for -rpath.  If -R is used to name a
	directory, treat it as -rpath for Solaris compatibility.
	* emultempl/elf32.em (gld${EMULATION_NAME}_before_allocation):
	Pass command_line.rpath to bfd_elf32_size_dynamic_sections.
	* ldmain.c (main): Initialize command_line.rpath to NULL.
	* ld.texinfo: Document -rpath option.