void
fe_file_change (const struct line_map *new_map)
{
if (new_map == NULL)
return;
if (new_map->reason == LC_ENTER)
{
/* Don't stack the main buffer on the input stack;
we already did in compile_file. */
if (!MAIN_FILE_P (new_map))
{
#ifdef USE_MAPPED_LOCATION
int included_at = LAST_SOURCE_LINE_LOCATION (new_map - 1);
input_location = included_at;
push_srcloc (new_map->start_location);
#else
int included_at = LAST_SOURCE_LINE (new_map - 1);
input_line = included_at;
push_srcloc (new_map->to_file, 1);
#endif
(*debug_hooks->start_source_file) (included_at, new_map->to_file);
#ifndef NO_IMPLICIT_EXTERN_C
if (c_header_level)
++c_header_level;
else if (new_map->sysp == 2)
{
c_header_level = 1;
++pending_lang_change;
}
#endif
}
}
else if (new_map->reason == LC_LEAVE)
{
#ifndef NO_IMPLICIT_EXTERN_C
if (c_header_level && --c_header_level == 0)
{
if (new_map->sysp == 2)
warning (0, "badly nested C headers from preprocessor");
--pending_lang_change;
}
#endif
pop_srcloc ();
(*debug_hooks->end_source_file) (new_map->to_line);
}
update_header_times (new_map->to_file);
in_system_header = new_map->sysp != 0;
#ifdef USE_MAPPED_LOCATION
input_location = new_map->start_location;
#else
input_filename = new_map->to_file;
input_line = new_map->to_line;
#endif
}
/* Initialize the C++ front end. This function is very sensitive to
the exact order that things are done here. It would be nice if the
initialization done by this routine were moved to its subroutines,
and the ordering dependencies clarified and reduced. */
bool
cxx_init (void)
{
unsigned int i;
static const enum tree_code stmt_codes[] = {
CTOR_INITIALIZER, TRY_BLOCK, HANDLER,
EH_SPEC_BLOCK, USING_STMT, TAG_DEFN,
IF_STMT, CLEANUP_STMT, FOR_STMT,
WHILE_STMT, DO_STMT, BREAK_STMT,
CONTINUE_STMT, SWITCH_STMT, EXPR_STMT
};
memset (&statement_code_p, 0, sizeof (statement_code_p));
for (i = 0; i < ARRAY_SIZE (stmt_codes); i++)
statement_code_p[stmt_codes[i]] = true;
/* We cannot just assign to input_filename because it has already
been initialized and will be used later as an N_BINCL for stabs+
debugging. */
#ifdef USE_MAPPED_LOCATION
push_srcloc (BUILTINS_LOCATION);
#else
push_srcloc ("<built-in>", 0);
#endif
init_reswords ();
init_tree ();
init_cp_semantics ();
init_operators ();
init_method ();
init_error ();
current_function_decl = NULL;
class_type_node = ridpointers[(int) RID_CLASS];
cxx_init_decl_processing ();
/* The fact that G++ uses COMDAT for many entities (inline
functions, template instantiations, virtual tables, etc.) mean
that it is fundamentally unreliable to try to make decisions
about whether or not to output a particular entity until the end
of the compilation. However, the inliner requires that functions
be provided to the back end if they are to be inlined.
Therefore, we always use unit-at-a-time mode; in that mode, we
can provide entities to the back end and it will decide what to
emit based on what is actually needed. */
flag_unit_at_a_time = 1;
if (c_common_init () == false)
{
pop_srcloc();
return false;
}
init_cp_pragma ();
init_repo ();
pop_srcloc();
return true;
}