On Mon, 25 Oct 2021 00:30:16 +0200
Bernhard Reutner-Fischer <rep.dot....@gmail.com> wrote:

> Hi!
> 
> Quickly skimming through the frontend headers.

I'm also attaching the other view for the fortran FE after the header
cleanup:

python3 $topsrc/contrib/unused_functions.py gcc/fortran/ \
  grep -v "gt_"

for a guesstimate list of
 Symbol 'foo' declared extern but never referenced externally

Down to about 50 for f951 as we want to keep the debug ones of course.

For other language frontends see the head of the script;
Back then there was no D nor modula2, and a go sample is missing, too.
Should be rather straight forward if anyone is curious. You can just
abbreviate the list of objects that are used to link your frontend.
Archives are supposedly handled fine, at least last time i tried.

HTH,
gcc/fortran/match.o: Symbol 'type_param_spec_list' declared extern but never 
referenced externally
gcc/fortran/openmp.o: Symbol 'gfc_free_expr_list(gfc_expr_list*)' declared 
extern but never referenced externally
gcc/fortran/openmp.o: Symbol 'gfc_free_omp_declare_simd(gfc_omp_declare_simd*)' 
declared extern but never referenced externally
gcc/fortran/openmp.o: Symbol 
'gfc_match_omp_context_selector(gfc_omp_set_selector*)' declared extern but 
never referenced externally
gcc/fortran/openmp.o: Symbol 
'gfc_match_omp_context_selector_specification(gfc_omp_declare_variant*)' 
declared extern but never referenced externally
gcc/fortran/trans-expr.o: Symbol 'gfc_class_vtab_hash_get(tree_node*)' declared 
extern but never referenced externally
gcc/fortran/trans-expr.o: Symbol 'gfc_class_vtab_extends_get(tree_node*)' 
declared extern but never referenced externally
gcc/fortran/trans-expr.o: Symbol 'gfc_vptr_extends_get(tree_node*)' declared 
extern but never referenced externally
gcc/fortran/trans-expr.o: Symbol 'gfc_class_vtab_def_init_get(tree_node*)' 
declared extern but never referenced externally
gcc/fortran/trans-expr.o: Symbol 'gfc_vptr_def_init_get(tree_node*)' declared 
extern but never referenced externally
gcc/fortran/trans-expr.o: Symbol 'gfc_class_vtab_copy_get(tree_node*)' declared 
extern but never referenced externally
gcc/fortran/trans-expr.o: Symbol 'gfc_vptr_copy_get(tree_node*)' declared 
extern but never referenced externally
gcc/fortran/trans-expr.o: Symbol 'gfc_vptr_final_get(tree_node*)' declared 
extern but never referenced externally
gcc/fortran/trans-expr.o: Symbol 'gfc_class_vtab_deallocate_get(tree_node*)' 
declared extern but never referenced externally
gcc/fortran/trans-decl.o: Symbol 'module_decl_hasher::hash(tree_node*)' 
declared extern but never referenced externally
gcc/fortran/trans-decl.o: Symbol 'gfor_fndecl_set_args' declared extern but 
never referenced externally
gcc/fortran/trans-decl.o: Symbol 'gfor_fndecl_set_convert' declared extern but 
never referenced externally
gcc/fortran/trans-decl.o: Symbol 'gfor_fndecl_set_record_marker' declared 
extern but never referenced externally
gcc/fortran/trans-decl.o: Symbol 'gfor_fndecl_set_max_subrecord_length' 
declared extern but never referenced externally
gcc/fortran/simplify.o: Symbol 'gfc_simplify_get_team(gfc_expr*)' declared 
extern but never referenced externally
gcc/fortran/simplify.o: Symbol 'simplify_ieee_selected_real_kind(gfc_expr*)' 
declared extern but never referenced externally
gcc/fortran/simplify.o: Symbol 'simplify_ieee_support(gfc_expr*)' declared 
extern but never referenced externally
gcc/fortran/decl.o: Symbol 'gfc_match_null(gfc_expr**)' declared extern but 
never referenced externally
gcc/fortran/decl.o: Symbol 'gfc_insert_kind_parameter_exprs(gfc_expr*)' 
declared extern but never referenced externally
gcc/fortran/decl.o: Symbol 'check_bind_name_identifier(char**)' declared extern 
but never referenced externally
gcc/fortran/decl.o: Symbol 'gfc_mod_pointee_as(gfc_array_spec*)' declared 
extern but never referenced externally
gcc/fortran/module.o: Symbol 'mio_symbol_ref(gfc_symbol**)' declared extern but 
never referenced externally
gcc/fortran/module.o: Symbol 'mio_interface_rest(gfc_interface**)' declared 
extern but never referenced externally
gcc/fortran/trans-intrinsic.o: Symbol 'specific_intrinsic_symbol(gfc_expr*)' 
declared extern but never referenced externally
gcc/fortran/resolve.o: Symbol 'gfc_elemental(gfc_symbol*)' declared extern but 
never referenced externally
gcc/fortran/trans-openmp.o: Symbol 'gfc_trans_oacc_declare(gfc_code*)' declared 
extern but never referenced externally
gcc/fortran/primary.o: Symbol 'matching_actual_arglist' declared extern but 
never referenced externally
gcc/fortran/symbol.o: Symbol 'gfc_drop_last_undo_checkpoint()' declared extern 
but never referenced externally
gcc/fortran/symbol.o: Symbol 'gfc_restore_last_undo_checkpoint()' declared 
extern but never referenced externally
gcc/fortran/symbol.o: Symbol 'gfc_get_ultimate_derived_super_type(gfc_symbol*)' 
declared extern but never referenced externally
gcc/fortran/gfortranspec.o: Symbol 'lang_specific_pre_link()' declared extern 
but never referenced externally
gcc/fortran/gfortranspec.o: Symbol 'lang_specific_extra_outfiles' declared 
extern but never referenced externally
gcc/fortran/class.o: Symbol 'gfc_intrinsic_hash_value(gfc_typespec*)' declared 
extern but never referenced externally
gcc/fortran/trans-array.o: Symbol 'gfc_conv_descriptor_attribute(tree_node*)' 
declared extern but never referenced externally
gcc/fortran/cpp.o: Symbol 'gfc_cpp_option' declared extern but never referenced 
externally
gcc/fortran/error.o: Symbol 'notify_std_msg(int)' declared extern but never 
referenced externally
gcc/fortran/frontend-passes.o: Symbol 'n_vars' declared extern but never 
referenced externally
gcc/fortran/frontend-passes.o: Symbol 'stack_top' declared extern but never 
referenced externally
gcc/fortran/frontend-passes.o: Symbol 'evec' declared extern but never 
referenced externally
gcc/fortran/interface.o: Symbol 'maybe_dummy_array_arg(gfc_expr*)' declared 
extern but never referenced externally
gcc/fortran/dump-parse-tree.o: Symbol 'debug(symbol_attribute*)' declared 
extern but never referenced externally
gcc/fortran/dump-parse-tree.o: Symbol 'debug(gfc_formal_arglist*)' declared 
extern but never referenced externally
gcc/fortran/dump-parse-tree.o: Symbol 'debug(symbol_attribute)' declared extern 
but never referenced externally
gcc/fortran/dump-parse-tree.o: Symbol 'debug(gfc_expr*)' declared extern but 
never referenced externally
gcc/fortran/dump-parse-tree.o: Symbol 'debug(gfc_typespec*)' declared extern 
but never referenced externally
gcc/fortran/dump-parse-tree.o: Symbol 'debug(gfc_typespec)' declared extern but 
never referenced externally
gcc/fortran/dump-parse-tree.o: Symbol 'debug(gfc_ref*)' declared extern but 
never referenced externally
gcc/fortran/dump-parse-tree.o: Symbol 'gfc_debug_expr(gfc_expr*)' declared 
extern but never referenced externally
gcc/fortran/dump-parse-tree.o: Symbol 'gfc_debug_code(gfc_code*)' declared 
extern but never referenced externally
gcc/fortran/dump-parse-tree.o: Symbol 'debug(gfc_symbol*)' declared extern but 
never referenced externally
gcc/fortran/dump-parse-tree.o: Symbol 'debug(gfc_array_ref*)' declared extern 
but never referenced externally

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