Do that by running this command:
  perl -pi -e    's/\bgfc_free ?\(/free (/' \
    $(git grep -El '\bgfc_free ?\(')
which also corrects the few uses that lacked a space between
the function name and the open parenthesis.
Manually undo the change to the function definition itself
and its prototype.  They'll be removed next.
* array.c (gfc_free_array_spec, gfc_set_array_spec): s/gfc_free/free/
* constructor.c (node_free): Likewise.
* cpp.c (dump_queued_macros): Likewise.
* data.c (gfc_assign_data_value): Likewise.
* decl.c (free_variable, free_value, gfc_free_data): Likewise.
(gfc_free_data_all, match_old_style_init): Likewise.
(gfc_set_constant_character_len, gfc_free_enum_history, NUM_DECL):
Likewise.
(gfc_match_modproc): Likewise.
* dependency.c (check_section_vs_section): Likewise.
* error.c (gfc_pop_error, gfc_free_error): Likewise.
* expr.c (free_expr0, gfc_free_expr, gfc_free_actual_arglist): Likewise.
(gfc_free_ref_list, gfc_replace_expr, gfc_copy_ref): Likewise.
(find_substring_ref, gfc_simplify_expr, gfc_check_assign_symbol):
Likewise.
* frontend-passes.c (gfc_run_passes, cfe_expr_0): Likewise.
(strip_function_call, optimize_comparison): Likewise.
* interface.c (gfc_free_interface, arginfo, check_interface0): Likewise.
(CHECK_OS_COMPARISON, gfc_extend_assign, gfc_free_formal_arglist):
Likewise.
* intrinsic.c (gfc_intrinsic_done_1, gfc_convert_type_warn): Likewise.
(gfc_convert_chartype): Likewise.
* io.c (gfc_free_open, compare_to_allowed_values, gfc_free_close):
Likewise.
(gfc_free_filepos, gfc_free_dt, gfc_free_inquire): Likewise.
* match.c (gfc_free_iterator, gfc_match_associate): Likewise.
(gfc_free_alloc_list, gfc_free_namelist, gfc_free_equiv_until):
Likewise.
(free_case, gfc_free_forall_iterator): Likewise.
* misc.c: Likewise.
* module.c (free_pi_tree, resolve_fixups, free_rename): Likewise.
(free_true_name, peek_atom, mio_allocated_wide_string): Likewise.
(mio_pool_string, mio_internal_string, mio_gmp_integer): Likewise.
(mio_gmp_real, mio_expr, mio_typebound_proc): Likewise.
(mio_full_typebound_tree, skip_list, load_equiv): Likewise.
(free_written_common, gfc_use_module, gfc_free_use_stmts): Likewise.
* openmp.c (gfc_free_omp_clauses): Likewise.
* options.c (gfc_post_options): Likewise.
* parse.c (select_type_pop, parse_omp_structured_block): Likewise.
* primary.c (gfc_free_structure_ctor_component): Likewise.
* resolve.c (resolve_structure_cons, check_host_association): Likewise.
(gfc_resolve_forall, resolve_equivalence): Likewise.
* scanner.c (gfc_scanner_done_1, gfc_release_include_path): Likewise.
(gfc_define_undef_line, preprocessor_line, include_line): Likewise.
(load_file, gfc_read_orig_filename): Likewise.
* simplify.c (simplify_transformation_to_array): Likewise.
(gfc_simplify_ibits, simplify_shift, gfc_simplify_ishftc, STRING):
Likewise.
(gfc_simplify_compiler_options): Likewise.
* st.c (gfc_free_statement, gfc_free_statements): Likewise.
(gfc_free_association_list): Likewise.
* symbol.c (free_components, gfc_free_st_label, free_st_labels):
Likewise.
(gfc_delete_symtree, gfc_free_symbol, gfc_undo_symbols): Likewise.
(free_old_symbol, gfc_commit_symbols, free_tb_tree): Likewise.
(free_common_tree, free_uop_tree, free_sym_tree): Likewise.
(gfc_free_dt_list, gfc_free_equiv_infos, gfc_free_equiv_lists):
Likewise.
(gfc_free_finalizer, gfc_free_charlen, free_entry_list): Likewise.
(gfc_free_namespace): Likewise.
* trans-array.c (gfc_free_ss, gfc_trans_array_bound_check): Likewise.
(gfc_conv_array_ref, gfc_conv_ss_startstride): Likewise.
(gfc_trans_dummy_array_bias, gfc_conv_array_parameter): Likewise.
* trans-common.c (get_init_field, create_common): Likewise.
* trans-const.c (gfc_build_wide_string_const): Likewise.
(gfc_conv_string_init): Likewise.
* trans-decl.c (gfc_generate_function_code): Likewise.
* trans-expr.c (gfc_conv_substring, gfc_free_interface_mapping):
Likewise.
(SCALAR_POINTER, gfc_conv_statement_function): Likewise.
(gfc_trans_subarray_assign): Likewise.
* trans-intrinsic.c (conv_generic_with_optional_char_arg): Likewise.
* trans-io.c (gfc_trans_io_runtime_check, set_string): Likewise.
(transfer_namelist_element, transfer_array_component): Likewise.
* trans-openmp.c (gfc_trans_omp_array_reduction): Likewise.
* trans-stmt.c (cleanup_forall_symtrees, gfc_trans_forall_1): Likewise.
* trans.c (trans_runtime_error_vararg, gfc_restore_backend_locus):
Likewise.

From-SVN: r172666