gdb/

gdb/
	Support DW_TAG_module as separate namespaces.
	* dwarf2read.c (typename_concat): New parameter physname.
	(read_module_type): New function and declaration.
	(scan_partial_symbols): Scan also DW_TAG_module children.
	(partial_die_parent_scope): Accept scope even from DW_TAG_module. Pass
	to typename_concat backward compatible physname value 0.
	(partial_die_full_name, read_namespace_type): Pass to typename_concat
	backward compatible physname value 0.
	(add_partial_module, read_module): Remove FIXME comment.
	(process_die) <DW_TAG_module>: Set PROCESSING_HAS_NAMESPACE_INFO.
	(die_needs_namespace) <DW_TAG_variable>: Allow returning true even for
	DIEs under DW_TAG_module.
	(dwarf2_compute_name): Move the ada block for DW_AT_linkage_name and
	DW_AT_MIPS_linkage_name first, extend it for language_fortran
	&& physname and return there instead of just setting NAME.  Extend
	the main block for language_fortran.  Pass physname parameter to the
	typename_concat call.
	(read_import_statement, read_func_scope, get_scope_pc_bounds)
	(load_partial_dies, determine_prefix): Support also DW_TAG_module.
	(new_symbol): Fill in cplus_specific.demangled_name if it is still
	missing from SYMBOL_SET_NAMES in the language_fortran case.
	(new_symbol) <DW_TAG_variable>: Force LOC_UNRESOLVED for gfortran module
	variables.
	(read_type_die) <DW_TAG_module>: New.
	(MAX_SEP_LEN): Increase to 7.
	(typename_concat): New parameter physname.  New variable lead.  Support
	also language_fortran.
	* f-exp.y (yylex): Consider : also as a symbol name character class.
	* f-lang.c: Include cp-support.h.
	(f_word_break_characters, f_make_symbol_completion_list): New functions.
	(f_language_defn): Use cp_lookup_symbol_nonlocal,
	f_word_break_characters and f_make_symbol_completion_list.
	* f-typeprint.c (f_type_print_base) <TYPE_CODE_MODULE>: New.
	* gdbtypes.h (enum type_code) <TYPE_CODE_MODULE>: New.
	* symtab.c (symbol_init_language_specific): Support language_fortran.
	(symbol_find_demangled_name): New comment on language_fortran.
	(symbol_natural_name, symbol_demangled_name): Use demangled_name even
	for language_fortran.
	(lookup_symbol_aux_local): Check imports also for language_fortran.
	(default_make_symbol_completion_list): Rename to ...
	(default_make_symbol_completion_list_break_on): ... this name.  New
	parameter break_on, use it.
	(default_make_symbol_completion_list): New stub.
	* symtab.h (default_make_symbol_completion_list_break_on): New
	prototype.

gdb/testsuite/
	Support DW_TAG_module as separate namespaces.
	* gdb.fortran/library-module.exp, gdb.fortran/library-module-main.f90,
	gdb.fortran/library-module-lib.f90: New.
	* gdb.fortran/module.exp: Replace startup by a prepare_for_testing call.
	(print i): Remove.
	(continue to breakpoint: i-is-1, print var_i value 1)
	(continue to breakpoint: i-is-2, print var_i value 2)
	(continue to breakpoint: a-b-c-d, print var_a, print var_b, print var_c)
	(print var_d, print var_i value 14, ptype modmany, complete `modm)
	(complete `modmany, complete `modmany`, complete `modmany`var)
	(show language, setting breakpoint at module): New tests.
	* gdb.fortran/module.f90 (module mod): Remove.
	(module mod1, module mod2, module modmany, subroutine sub1)
	(subroutine sub2, program module): New.