"--file-ordering" options.
(usage): Add new options to usage message.
(main): Handle new options.
* gprof.h (STYLE_FUNCTION_ORDER): Define.
(STYLE_FILE_ORDER): Define.
(function_mapping_file): Declare.
* cg_arcs.c (arcs, numarcs): New globals.
(arc_add): Put new arcs into the arc array so the function/file
ordering code can examine them.
* cg_arcs.h (struct arc): New field "has_been_placed".
(arcs, numarcs): Declare new globals.
* core.c (symbol_map, symbol_map_count): New globals.
(read_function_mappings): New function to read in a function
to object map file.
(core_init): Call read_function_mappings if a function mapping
file exists.
(core_create_function_syms): Handle function to object file
mappings.
* symtab.h (struct sym): New fields "mapped", "has_been_placed",
"nuses", "prev".
* cg_print.c (cmp_arc_count): New function for sorting arcs.
(cmp_fun_nuses): Likewise for functions.
(cg_print_function_ordering): New function to print a suggested
function ordering.
(cg_print_file_ordering): Likewise for ordering .o files.
(order_and_dump_functions_by_arcs): Helper function for function
and object file ordering code.
Gprof changes for mentor vm work.
set if ignore_non_function is set.
* gprof.h (ignore_non_functions): Declare.
* gprof.c (ignore_non_functions): Define.
(long_options): Add "ignore-non-functions".
(usage): Add new options.
(main): Recognize "-D" and "--ignore-non-functions" option.
So we can get more accurate information on Solaris, HPUX and other
systems that can uniquely identify function symbols.
