/* C/ObjC/C++ command line option handling.
- Copyright (C) 2002-2018 Free Software Foundation, Inc.
+ Copyright (C) 2002-2020 Free Software Foundation, Inc.
Contributed by Neil Booth.
This file is part of GCC.
#include "plugin.h" /* For PLUGIN_INCLUDE_FILE event. */
#include "mkdeps.h"
#include "dumpfile.h"
+#include "file-prefix-map.h" /* add_*_prefix_map() */
#ifndef DOLLARS_IN_IDENTIFIERS
# define DOLLARS_IN_IDENTIFIERS true
static void set_std_cxx11 (int);
static void set_std_cxx14 (int);
static void set_std_cxx17 (int);
-static void set_std_cxx2a (int);
+static void set_std_cxx20 (int);
static void set_std_c89 (int, int);
static void set_std_c99 (int);
static void set_std_c11 (int);
static void set_std_c17 (int);
+static void set_std_c2x (int);
static void check_deps_environment_vars (void);
static void handle_deferred_opts (void);
static void sanitize_cpp_opts (void);
/* Diagnostic finalizer for C/C++/Objective-C/Objective-C++. */
static void
c_diagnostic_finalizer (diagnostic_context *context,
- diagnostic_info *diagnostic)
+ diagnostic_info *diagnostic,
+ diagnostic_t)
{
+ char *saved_prefix = pp_take_prefix (context->printer);
+ pp_set_prefix (context->printer, NULL);
+ pp_newline (context->printer);
diagnostic_show_locus (context, diagnostic->richloc, diagnostic->kind);
/* By default print macro expansion contexts in the diagnostic
finalizer -- for tokens resulting from macro expansion. */
virt_loc_aware_diagnostic_finalizer (context, diagnostic);
- pp_destroy_prefix (context->printer);
+ pp_set_prefix (context->printer, saved_prefix);
pp_flush (context->printer);
}
parse_in = cpp_create_reader (c_dialect_cxx () ? CLK_GNUCXX: CLK_GNUC89,
ident_hash, line_table);
cb = cpp_get_callbacks (parse_in);
- cb->error = c_cpp_error;
+ cb->diagnostic = c_cpp_diagnostic;
cpp_opts = cpp_get_options (parse_in);
cpp_opts->dollars_in_ident = DOLLARS_IN_IDENTIFIERS;
}
}
- /* Set C++ standard to C++14 if not specified on the command line. */
+ /* Set C++ standard to C++17 if not specified on the command line. */
if (c_dialect_cxx ())
- set_std_cxx14 (/*ISO*/false);
+ set_std_cxx17 (/*ISO*/false);
global_dc->colorize_source_p = true;
}
form of an -f or -W option was given. Returns false if the switch was
invalid, true if valid. Use HANDLERS in recursive handle_option calls. */
bool
-c_common_handle_option (size_t scode, const char *arg, int value,
+c_common_handle_option (size_t scode, const char *arg, HOST_WIDE_INT value,
int kind, location_t loc,
const struct cl_option_handlers *handlers)
{
else
{
if (quote_chain_split)
- error ("-I- specified twice");
+ error ("%<-I-%> specified twice");
quote_chain_split = true;
split_quote_chain ();
- inform (input_location, "obsolete option -I- used, please use -iquote instead");
+ inform (input_location, "obsolete option %<-I-%> used, "
+ "please use %<-iquote%> instead");
}
break;
cpp_opts->warn_num_sign_change = value;
break;
- case OPT_Walloca_larger_than_:
- if (!value)
- inform (loc, "-Walloca-larger-than=0 is meaningless");
- break;
-
- case OPT_Wvla_larger_than_:
- if (!value)
- inform (loc, "-Wvla-larger-than=0 is meaningless");
- break;
-
case OPT_Wunknown_pragmas:
/* Set to greater than 1, so that even unknown pragmas in
system headers will be warned about. */
value = 2;
}
warn_abi_version = value;
- if (flag_abi_compat_version == -1)
- flag_abi_compat_version = value;
break;
case OPT_fcanonical_system_headers:
cpp_opts->dollars_in_ident = value;
break;
+ case OPT_fmacro_prefix_map_:
+ add_macro_prefix_map (arg);
+ break;
+
case OPT_ffreestanding:
value = !value;
/* Fall through. */
cpp_opts->extended_identifiers = value;
break;
+ case OPT_fmax_include_depth_:
+ cpp_opts->max_include_depth = value;
+ break;
+
case OPT_foperator_names:
cpp_opts->operator_names = value;
break;
cpp_opts->track_macro_expansion = 2;
break;
- case OPT_frepo:
- flag_use_repository = value;
- if (value)
- flag_implicit_templates = 0;
- break;
-
case OPT_ftabstop_:
/* It is documented that we silently ignore silly values. */
if (value >= 1 && value <= 100)
set_std_cxx17 (code == OPT_std_c__17 /* ISO */);
break;
- case OPT_std_c__2a:
- case OPT_std_gnu__2a:
+ case OPT_std_c__20:
+ case OPT_std_gnu__20:
if (!preprocessing_asm_p)
- set_std_cxx2a (code == OPT_std_c__2a /* ISO */);
+ set_std_cxx20 (code == OPT_std_c__20 /* ISO */);
break;
case OPT_std_c90:
set_std_c17 (false /* ISO */);
break;
+ case OPT_std_c2x:
+ if (!preprocessing_asm_p)
+ set_std_c2x (true /* ISO */);
+ break;
+
+ case OPT_std_gnu2x:
+ if (!preprocessing_asm_p)
+ set_std_c2x (false /* ISO */);
+ break;
+
case OPT_trigraphs:
cpp_opts->trigraphs = 1;
break;
support. */
if (c_dialect_cxx ())
{
- if (flag_excess_precision_cmdline == EXCESS_PRECISION_STANDARD)
- sorry ("-fexcess-precision=standard for C++");
- flag_excess_precision_cmdline = EXCESS_PRECISION_FAST;
+ if (flag_excess_precision == EXCESS_PRECISION_STANDARD)
+ sorry ("%<-fexcess-precision=standard%> for C++");
+ flag_excess_precision = EXCESS_PRECISION_FAST;
}
- else if (flag_excess_precision_cmdline == EXCESS_PRECISION_DEFAULT)
- flag_excess_precision_cmdline = (flag_iso
- ? EXCESS_PRECISION_STANDARD
- : EXCESS_PRECISION_FAST);
+ else if (flag_excess_precision == EXCESS_PRECISION_DEFAULT)
+ flag_excess_precision = (flag_iso ? EXCESS_PRECISION_STANDARD
+ : EXCESS_PRECISION_FAST);
/* ISO C restricts floating-point expression contraction to within
source-language expressions (-ffp-contract=on, currently an alias
else
flag_permitted_flt_eval_methods = PERMITTED_FLT_EVAL_METHODS_C11;
+ /* C2X Annex F does not permit certain built-in functions to raise
+ "inexact". */
+ if (flag_isoc2x)
+ SET_OPTION_IF_UNSET (&global_options, &global_options_set,
+ flag_fp_int_builtin_inexact, 0);
+
/* By default we use C99 inline semantics in GNU99 or C99 mode. C99
inline semantics are not supported in GNU89 or C89 mode. */
if (flag_gnu89_inline == -1)
flag_gnu89_inline = !flag_isoc99;
else if (!flag_gnu89_inline && !flag_isoc99)
- error ("-fno-gnu89-inline is only supported in GNU99 or C99 mode");
+ error ("%<-fno-gnu89-inline%> is only supported in GNU99 or C99 mode");
/* Default to ObjC sjlj exception handling if NeXT runtime. */
if (flag_objc_sjlj_exceptions < 0)
/* If -ffreestanding, -fno-hosted or -fno-builtin then disable
pattern recognition. */
- if (!global_options_set.x_flag_tree_loop_distribute_patterns
- && flag_no_builtin)
- flag_tree_loop_distribute_patterns = 0;
+ if (flag_no_builtin)
+ SET_OPTION_IF_UNSET (&global_options, &global_options_set,
+ flag_tree_loop_distribute_patterns, 0);
/* -Woverlength-strings is off by default, but is enabled by -Wpedantic.
It is never enabled in C++, as the minimum limit is not normative
if (!warn_format)
{
warning (OPT_Wformat_y2k,
- "-Wformat-y2k ignored without -Wformat");
+ "%<-Wformat-y2k%> ignored without %<-Wformat%>");
warning (OPT_Wformat_extra_args,
- "-Wformat-extra-args ignored without -Wformat");
+ "%<-Wformat-extra-args%> ignored without %<-Wformat%>");
warning (OPT_Wformat_zero_length,
- "-Wformat-zero-length ignored without -Wformat");
+ "%<-Wformat-zero-length%> ignored without %<-Wformat%>");
warning (OPT_Wformat_nonliteral,
- "-Wformat-nonliteral ignored without -Wformat");
+ "%<-Wformat-nonliteral%> ignored without %<-Wformat%>");
warning (OPT_Wformat_contains_nul,
- "-Wformat-contains-nul ignored without -Wformat");
+ "%<-Wformat-contains-nul%> ignored without %<-Wformat%>");
warning (OPT_Wformat_security,
- "-Wformat-security ignored without -Wformat");
+ "%<-Wformat-security%> ignored without %<-Wformat%>");
}
/* -Wimplicit-function-declaration is enabled by default for C99. */
if (warn_implicit_int == -1)
warn_implicit_int = flag_isoc99;
+ /* -Wold-style-definition is enabled by default for C2X. */
+ if (warn_old_style_definition == -1)
+ warn_old_style_definition = flag_isoc2x;
+
/* -Wshift-overflow is enabled by default in C99 and C++11 modes. */
if (warn_shift_overflow == -1)
warn_shift_overflow = cxx_dialect >= cxx11 || flag_isoc99;
&& (cxx_dialect >= cxx11 || flag_isoc99));
/* -Wregister is enabled by default in C++17. */
- if (!global_options_set.x_warn_register)
- warn_register = cxx_dialect >= cxx17;
+ SET_OPTION_IF_UNSET (&global_options, &global_options_set, warn_register,
+ cxx_dialect >= cxx17);
+
+ /* -Wcomma-subscript is enabled by default in C++20. */
+ SET_OPTION_IF_UNSET (&global_options, &global_options_set,
+ warn_comma_subscript,
+ cxx_dialect >= cxx20 && warn_deprecated);
+
+ /* -Wvolatile is enabled by default in C++20. */
+ SET_OPTION_IF_UNSET (&global_options, &global_options_set, warn_volatile,
+ cxx_dialect >= cxx20 && warn_deprecated);
/* Declone C++ 'structors if -Os. */
if (flag_declone_ctor_dtor == -1)
flag_declone_ctor_dtor = optimize_size;
- if (warn_abi_version == -1)
- {
- if (flag_abi_compat_version != -1)
- warn_abi_version = flag_abi_compat_version;
- else
- warn_abi_version = 0;
- }
-
if (flag_abi_compat_version == 1)
{
warning (0, "%<-fabi-compat-version=1%> is not supported, using =2");
flag_abi_compat_version = 2;
}
- else if (flag_abi_compat_version == -1)
+
+ /* Change flag_abi_version to be the actual current ABI level, for the
+ benefit of c_cpp_builtins, and to make comparison simpler. */
+ const int latest_abi_version = 14;
+ /* Generate compatibility aliases for ABI v11 (7.1) by default. */
+ const int abi_compat_default = 11;
+
+#define clamp(X) if (X == 0 || X > latest_abi_version) X = latest_abi_version
+ clamp (flag_abi_version);
+ clamp (warn_abi_version);
+ clamp (flag_abi_compat_version);
+#undef clamp
+
+ /* Default -Wabi= or -fabi-compat-version= from each other. */
+ if (warn_abi_version == -1 && flag_abi_compat_version != -1)
+ warn_abi_version = flag_abi_compat_version;
+ else if (flag_abi_compat_version == -1 && warn_abi_version != -1)
+ flag_abi_compat_version = warn_abi_version;
+ else if (warn_abi_version == -1 && flag_abi_compat_version == -1)
{
- /* Generate compatibility aliases for ABI v11 (7.1) by default. */
- flag_abi_compat_version
- = (flag_abi_version == 0 ? 11 : 0);
+ warn_abi_version = latest_abi_version;
+ if (flag_abi_version == latest_abi_version)
+ {
+ auto_diagnostic_group d;
+ if (warning (OPT_Wabi, "%<-Wabi%> won%'t warn about anything"))
+ {
+ inform (input_location, "%<-Wabi%> warns about differences "
+ "from the most up-to-date ABI, which is also used "
+ "by default");
+ inform (input_location, "use e.g. %<-Wabi=11%> to warn about "
+ "changes from GCC 7");
+ }
+ flag_abi_compat_version = abi_compat_default;
+ }
+ else
+ flag_abi_compat_version = latest_abi_version;
}
- /* Change flag_abi_version to be the actual current ABI level for the
- benefit of c_cpp_builtins. */
- if (flag_abi_version == 0)
- flag_abi_version = 12;
-
/* By default, enable the new inheriting constructor semantics along with ABI
11. New and old should coexist fine, but it is a change in what
artificial symbols are generated. */
- if (!global_options_set.x_flag_new_inheriting_ctors)
- flag_new_inheriting_ctors = abi_version_at_least (11);
+ SET_OPTION_IF_UNSET (&global_options, &global_options_set,
+ flag_new_inheriting_ctors,
+ abi_version_at_least (11));
/* For GCC 7, only enable DR150 resolution by default if -std=c++17. */
- if (!global_options_set.x_flag_new_ttp)
- flag_new_ttp = (cxx_dialect >= cxx17);
+ SET_OPTION_IF_UNSET (&global_options, &global_options_set, flag_new_ttp,
+ cxx_dialect >= cxx17);
+
+ /* C++11 guarantees forward progress. */
+ SET_OPTION_IF_UNSET (&global_options, &global_options_set, flag_finite_loops,
+ optimize >= 2 && cxx_dialect >= cxx11);
if (cxx_dialect >= cxx11)
{
if (flag_sized_deallocation == -1)
flag_sized_deallocation = (cxx_dialect >= cxx14);
+ /* char8_t support is new in C++20. */
+ if (flag_char8_t == -1)
+ flag_char8_t = (cxx_dialect >= cxx20);
+
if (flag_extern_tls_init)
{
if (!TARGET_SUPPORTS_ALIASES || !SUPPORTS_WEAK)
flag_extern_tls_init = 1;
}
- if (warn_return_type == -1)
- warn_return_type = c_dialect_cxx ();
+ /* Enable by default only for C++ and C++ with ObjC extensions. */
+ if (warn_return_type == -1 && c_dialect_cxx ())
+ warn_return_type = 1;
+
+ /* C++20 is the final version of concepts. We still use -fconcepts
+ to know when concepts are enabled. Note that -fconcepts-ts can
+ be used to include additional features, although modified to
+ work with the standard. */
+ if (cxx_dialect >= cxx20 || flag_concepts_ts)
+ flag_concepts = 1;
+ else if (flag_concepts)
+ /* For -std=c++17 -fconcepts, imply -fconcepts-ts. */
+ flag_concepts_ts = 1;
if (num_in_fnames > 1)
- error ("too many filenames given. Type %s --help for usage",
- progname);
+ error ("too many filenames given; type %<%s %s%> for usage",
+ progname, "--help");
if (flag_preprocess_only)
{
debug formats we warn here and refuse to load any PCH files. */
if (write_symbols != NO_DEBUG && write_symbols != DWARF2_DEBUG)
warning (OPT_Wdeprecated,
- "the \"%s\" debug format cannot be used with "
+ "the %qs debug format cannot be used with "
"pre-compiled headers", debug_type_names[write_symbols]);
}
else if (write_symbols != NO_DEBUG && write_symbols != DWARF2_DEBUG)
input_location = UNKNOWN_LOCATION;
*pfilename = this_input_filename
- = cpp_read_main_file (parse_in, in_fnames[0]);
+ = cpp_read_main_file (parse_in, in_fnames[0],
+ /* We'll inject preamble pieces if this is
+ not preprocessed. */
+ !cpp_opts->preprocessed);
+
/* Don't do any compilation or preprocessing if there is no input file. */
if (this_input_filename == NULL)
{
static void
handle_deferred_opts (void)
{
- size_t i;
- struct deps *deps;
-
/* Avoid allocating the deps buffer if we don't need it.
(This flag may be true without there having been -MT or -MQ
options, but we'll still need the deps buffer.) */
if (!deps_seen)
return;
- deps = cpp_get_deps (parse_in);
-
- for (i = 0; i < deferred_count; i++)
- {
- struct deferred_opt *opt = &deferred_opts[i];
+ if (mkdeps *deps = cpp_get_deps (parse_in))
+ for (unsigned i = 0; i < deferred_count; i++)
+ {
+ struct deferred_opt *opt = &deferred_opts[i];
- if (opt->code == OPT_MT || opt->code == OPT_MQ)
- deps_add_target (deps, opt->arg, opt->code == OPT_MQ);
- }
+ if (opt->code == OPT_MT || opt->code == OPT_MQ)
+ deps_add_target (deps, opt->arg, opt->code == OPT_MQ);
+ }
}
/* These settings are appropriate for GCC, but not necessarily so for
/* If we don't know what style of dependencies to output, complain
if any other dependency switches have been given. */
if (deps_seen && cpp_opts->deps.style == DEPS_NONE)
- error ("to generate dependencies you must specify either -M or -MM");
+ error ("to generate dependencies you must specify either %<-M%> "
+ "or %<-MM%>");
/* -dM and dependencies suppress normal output; do it here so that
the last -d[MDN] switch overrides earlier ones. */
flag_no_line_commands = 1;
}
else if (cpp_opts->deps.missing_files)
- error ("-MG may only be used with -M or -MM");
+ error ("%<-MG%> may only be used with %<-M%> or %<-MM%>");
cpp_opts->unsigned_char = !flag_signed_char;
cpp_opts->stdc_0_in_system_headers = STDC_0_IN_SYSTEM_HEADERS;
if (cpp_opts->directives_only)
{
if (cpp_warn_unused_macros)
- error ("-fdirectives-only is incompatible with -Wunused_macros");
+ error ("%<-fdirectives-only%> is incompatible "
+ "with %<-Wunused-macros%>");
if (cpp_opts->traditional)
- error ("-fdirectives-only is incompatible with -traditional");
+ error ("%<-fdirectives-only%> is incompatible with %<-traditional%>");
}
}
{
if (!cpp_opts->preprocessed)
{
- size_t i;
+ const line_map_ordinary *bltin_map
+ = linemap_check_ordinary (linemap_add (line_table, LC_RENAME, 0,
+ _("<built-in>"), 0));
+ cb_file_change (parse_in, bltin_map);
+ linemap_line_start (line_table, 0, 1);
- cb_file_change (parse_in,
- linemap_check_ordinary (linemap_add (line_table,
- LC_RENAME, 0,
- _("<built-in>"),
- 0)));
/* Make sure all of the builtins about to be declared have
- BUILTINS_LOCATION has their source_location. */
- source_location builtins_loc = BUILTINS_LOCATION;
- cpp_force_token_locations (parse_in, &builtins_loc);
+ BUILTINS_LOCATION has their location_t. */
+ cpp_force_token_locations (parse_in, BUILTINS_LOCATION);
cpp_init_builtins (parse_in, flag_hosted);
c_cpp_builtins (parse_in);
- cpp_stop_forcing_token_locations (parse_in);
-
/* We're about to send user input to cpplib, so make it warn for
things that we previously (when we sent it internal definitions)
told it to not warn.
their acceptance on the -std= setting. */
cpp_opts->warn_dollars = (cpp_opts->cpp_pedantic && !cpp_opts->c99);
- cb_file_change (parse_in,
- linemap_check_ordinary (linemap_add (line_table, LC_RENAME, 0,
- _("<command-line>"), 0)));
+ const line_map_ordinary *cmd_map
+ = linemap_check_ordinary (linemap_add (line_table, LC_RENAME, 0,
+ _("<command-line>"), 0));
+ cb_file_change (parse_in, cmd_map);
+ linemap_line_start (line_table, 0, 1);
- for (i = 0; i < deferred_count; i++)
+ /* All command line defines must have the same location. */
+ cpp_force_token_locations (parse_in, line_table->highest_line);
+ for (size_t i = 0; i < deferred_count; i++)
{
struct deferred_opt *opt = &deferred_opts[i];
}
}
- /* Start the main input file, if the debug writer wants it. */
- if (debug_hooks->start_end_main_source_file
- && !flag_preprocess_only)
- (*debug_hooks->start_source_file) (0, this_input_filename);
+ cpp_stop_forcing_token_locations (parse_in);
+ }
+ else if (cpp_opts->directives_only)
+ cpp_init_special_builtins (parse_in);
- /* Handle -imacros after -D and -U. */
- for (i = 0; i < deferred_count; i++)
- {
- struct deferred_opt *opt = &deferred_opts[i];
+ /* Start the main input file, if the debug writer wants it. */
+ if (debug_hooks->start_end_main_source_file
+ && !flag_preprocess_only)
+ (*debug_hooks->start_source_file) (0, this_input_filename);
- if (opt->code == OPT_imacros
- && cpp_push_include (parse_in, opt->arg))
- {
- /* Disable push_command_line_include callback for now. */
- include_cursor = deferred_count + 1;
- cpp_scan_nooutput (parse_in);
- }
- }
- }
- else
- {
- if (cpp_opts->directives_only)
- cpp_init_special_builtins (parse_in);
+ if (!cpp_opts->preprocessed)
+ /* Handle -imacros after -D and -U. */
+ for (size_t i = 0; i < deferred_count; i++)
+ {
+ struct deferred_opt *opt = &deferred_opts[i];
- /* Start the main input file, if the debug writer wants it. */
- if (debug_hooks->start_end_main_source_file
- && !flag_preprocess_only)
- (*debug_hooks->start_source_file) (0, this_input_filename);
- }
+ if (opt->code == OPT_imacros
+ && cpp_push_include (parse_in, opt->arg))
+ {
+ /* Disable push_command_line_include callback for now. */
+ include_cursor = deferred_count + 1;
+ cpp_scan_nooutput (parse_in);
+ }
+ }
include_cursor = 0;
push_command_line_include ();
include_cursor++;
/* -Wunused-macros should only warn about macros defined hereafter. */
cpp_opts->warn_unused_macros = cpp_warn_unused_macros;
- /* Restore the line map from <command line>. */
+ /* Restore the line map back to the main file. */
if (!cpp_opts->preprocessed)
cpp_change_file (parse_in, LC_RENAME, this_input_filename);
flag_isoc94 = c94;
flag_isoc99 = 0;
flag_isoc11 = 0;
+ flag_isoc2x = 0;
lang_hooks.name = "GNU C89";
}
flag_no_asm = iso;
flag_no_nonansi_builtin = iso;
flag_iso = iso;
+ flag_isoc2x = 0;
flag_isoc11 = 0;
flag_isoc99 = 1;
flag_isoc94 = 1;
flag_no_asm = iso;
flag_no_nonansi_builtin = iso;
flag_iso = iso;
+ flag_isoc2x = 0;
flag_isoc11 = 1;
flag_isoc99 = 1;
flag_isoc94 = 1;
flag_no_asm = iso;
flag_no_nonansi_builtin = iso;
flag_iso = iso;
+ flag_isoc2x = 0;
flag_isoc11 = 1;
flag_isoc99 = 1;
flag_isoc94 = 1;
lang_hooks.name = "GNU C17";
}
+/* Set the C 2X standard (without GNU extensions if ISO). */
+static void
+set_std_c2x (int iso)
+{
+ cpp_set_lang (parse_in, iso ? CLK_STDC2X: CLK_GNUC2X);
+ flag_no_asm = iso;
+ flag_no_nonansi_builtin = iso;
+ flag_iso = iso;
+ flag_isoc2x = 1;
+ flag_isoc11 = 1;
+ flag_isoc99 = 1;
+ flag_isoc94 = 1;
+ lang_hooks.name = "GNU C2X";
+}
+
/* Set the C++ 98 standard (without GNU extensions if ISO). */
static void
lang_hooks.name = "GNU C++17";
}
-/* Set the C++ 202a draft standard (without GNU extensions if ISO). */
+/* Set the C++ 2020 standard (without GNU extensions if ISO). */
static void
-set_std_cxx2a (int iso)
+set_std_cxx20 (int iso)
{
- cpp_set_lang (parse_in, iso ? CLK_CXX2A: CLK_GNUCXX2A);
+ cpp_set_lang (parse_in, iso ? CLK_CXX20: CLK_GNUCXX20);
flag_no_gnu_keywords = iso;
flag_no_nonansi_builtin = iso;
flag_iso = iso;
flag_isoc94 = 1;
flag_isoc99 = 1;
flag_isoc11 = 1;
- cxx_dialect = cxx2a;
- lang_hooks.name = "GNU C++17"; /* Pretend C++17 until standardization. */
+ /* C++20 includes coroutines. */
+ flag_coroutines = true;
+ cxx_dialect = cxx20;
+ lang_hooks.name = "GNU C++20";
}
/* Args to -d specify what to dump. Silently ignore
git://gcc.gnu.org / gcc.git / blobdiff