* collect2.c: Include diagnostic.h.
	(fatal_perror, fatal, error, fancy_abort): Remove.
	(main): Set progname.  Call xmalloc_set_program_name and
	diagnostic_initialize.
	(maybe_run_lto_and_relink, main, collect_execute, scan_prog_file,
	scan_libraries, resolve_lib_name): Call fatal_error instead of
	fatal and fatal_perror.
	* collect2.h (error, fatal, fatal_perror): Don't declare.
	* tlink.c: Include diagnostic-core.h.
	(recompile_files): Call fatal_error instead of fatal_perror.
	* Makefile.in (COLLECT2_OBJS): Include diagnostic.o,
	pretty-print.o and input.o.
	(collect2.o, tlink.o): Update dependencies.

testsuite:
	* lib/prune.exe (prune_gcc_output): Expect "error:" in collect2
	output.

From-SVN: r173915