/* C/ObjC/C++ command line option handling.
- Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007
+ Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008
Free Software Foundation, Inc.
Contributed by Neil Booth.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
-Software Foundation; either version 2, or (at your option) any later
+Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
for more details.
You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "diagnostic.h"
#include "intl.h"
#include "cppdefault.h"
-#include "c-incpath.h"
+#include "incpath.h"
#include "debug.h" /* For debug_hooks. */
#include "opts.h"
#include "options.h"
#include "mkdeps.h"
+#include "target.h"
+#include "tm_p.h"
#ifndef DOLLARS_IN_IDENTIFIERS
# define DOLLARS_IN_IDENTIFIERS true
#endif
/* CPP's options. */
-static cpp_options *cpp_opts;
+cpp_options *cpp_opts;
/* Input filename. */
static const char *this_input_filename;
/* If -v seen. */
static bool verbose;
-/* If -lang-fortran seen. */
-static bool lang_fortran = false;
-
/* Dependency output file. */
static const char *deps_file;
}
parse_in = cpp_create_reader (c_dialect_cxx () ? CLK_GNUCXX: CLK_GNUC89,
- ident_hash, &line_table);
+ ident_hash, line_table);
cpp_opts = cpp_get_options (parse_in);
cpp_opts->dollars_in_ident = DOLLARS_IN_IDENTIFIERS;
warn_pointer_arith = c_dialect_cxx ();
warn_write_strings = c_dialect_cxx();
+ /* By default, C99-like requirements for complex multiply and divide. */
+ flag_complex_method = 2;
+
deferred_opts = XNEWVEC (struct deferred_opt, argc);
result = lang_flags[c_language];
result |= CL_C | CL_ObjC | CL_CXX | CL_ObjCXX;
break;
}
-
-#ifdef CL_Fortran
- for (i = 1; i < argc; i++)
- if (! strcmp (argv[i], "-lang-fortran"))
- {
- result |= CL_Fortran;
- break;
- }
-#endif
}
return result;
{
default:
if (cl_options[code].flags & (CL_C | CL_CXX | CL_ObjC | CL_ObjCXX))
- break;
-#ifdef CL_Fortran
- if (lang_fortran && (cl_options[code].flags & (CL_Fortran)))
- break;
-#endif
+ {
+ if ((option->flags & CL_TARGET)
+ && ! targetcm.handle_c_option (scode, arg, value))
+ result = 0;
+ break;
+ }
result = 0;
break;
error ("-I- specified twice");
quote_chain_split = true;
split_quote_chain ();
- inform ("obsolete option -I- used, please use -iquote instead");
+ inform (input_location, "obsolete option -I- used, please use -iquote instead");
}
break;
break;
case OPT_Wall:
- set_Wunused (value);
+ warn_unused = value;
set_Wformat (value);
set_Wimplicit (value);
warn_char_subscripts = value;
warn_parentheses = value;
warn_return_type = value;
warn_sequence_point = value; /* Was C only. */
- if (c_dialect_cxx ())
- warn_sign_compare = value;
warn_switch = value;
- warn_strict_aliasing = value;
+ if (warn_strict_aliasing == -1)
+ set_Wstrict_aliasing (value);
warn_address = value;
- warn_strict_overflow = value;
+ if (warn_strict_overflow == -1)
+ warn_strict_overflow = value;
warn_array_bounds = value;
+ warn_volatile_register_var = value;
/* Only warn about unknown pragmas that are not in system
headers. */
warn_uninitialized = (value ? 2 : 0);
if (!c_dialect_cxx ())
- /* We set this to 2 here, but 1 in -Wmain, so -ffreestanding
- can turn it off only if it's not explicit. */
- warn_main = value * 2;
+ {
+ /* We set this to 2 here, but 1 in -Wmain, so -ffreestanding
+ can turn it off only if it's not explicit. */
+ if (warn_main == -1)
+ warn_main = (value ? 2 : 0);
+ }
else
{
/* C++-specific warnings. */
+ warn_sign_compare = value;
warn_reorder = value;
- warn_nontemplate_friend = value;
warn_cxx0x_compat = value;
- if (value > 0)
- warn_write_strings = true;
}
cpp_opts->warn_trigraphs = value;
cpp_opts->warn_comments = value;
cpp_opts->warn_num_sign_change = value;
- cpp_opts->warn_multichar = value; /* Was C++ only. */
if (warn_pointer_sign == -1)
warn_pointer_sign = 1;
break;
+ case OPT_Wbuiltin_macro_redefined:
+ cpp_opts->warn_builtin_macro_redefined = value;
+ break;
+
case OPT_Wcomment:
case OPT_Wcomments:
cpp_opts->warn_comments = value;
cpp_opts->warn_invalid_pch = value;
break;
- case OPT_Wmain:
- if (value)
- warn_main = 1;
- else
- warn_main = -1;
- break;
-
case OPT_Wmissing_include_dirs:
cpp_opts->warn_missing_include_dirs = value;
break;
disable_builtin_function (arg);
break;
+ case OPT_fdirectives_only:
+ cpp_opts->directives_only = value;
+ break;
+
case OPT_fdollars_in_identifiers:
cpp_opts->dollars_in_ident = value;
break;
case OPT_fhosted:
flag_hosted = value;
flag_no_builtin = !value;
- /* warn_main will be 2 if set by -Wall, 1 if set by -Wmain */
- if (!value && warn_main == 2)
- warn_main = 0;
break;
case OPT_fshort_double:
flag_gen_declaration = 1;
break;
+ case OPT_femit_struct_debug_baseonly:
+ set_struct_debug_option ("base");
+ break;
+
+ case OPT_femit_struct_debug_reduced:
+ set_struct_debug_option ("dir:ord:sys,dir:gen:any,ind:base");
+ break;
+
+ case OPT_femit_struct_debug_detailed_:
+ set_struct_debug_option (arg);
+ break;
+
case OPT_idirafter:
add_path (xstrdup (arg), AFTER, 0, true);
break;
cpp_opts->dollars_in_ident = false;
break;
- case OPT_lang_fortran:
- lang_fortran = true;
- break;
-
case OPT_lang_objc:
cpp_opts->objc = 1;
break;
warn_pointer_sign = 1;
if (warn_overlength_strings == -1)
warn_overlength_strings = 1;
+ if (warn_main == -1)
+ warn_main = 2;
break;
case OPT_print_objc_runtime_info:
C_COMMON_OVERRIDE_OPTIONS;
#endif
- flag_inline_trees = 1;
-
- /* Use tree inlining. */
- if (!flag_no_inline)
- flag_no_inline = 1;
- if (flag_inline_functions)
- flag_inline_trees = 2;
-
- /* If we are given more than one input file, we must use
- unit-at-a-time mode. */
- if (num_in_fnames > 1)
- flag_unit_at_a_time = 1;
+ /* 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");
/* Default to ObjC sjlj exception handling if NeXT runtime. */
if (flag_objc_sjlj_exceptions < 0)
if (flag_objc_exceptions && !flag_objc_sjlj_exceptions)
flag_exceptions = 1;
- /* -Wextra implies -Wclobbered, -Wempty-body, -Wsign-compare,
+ /* -Wextra implies -Wtype-limits, -Wclobbered,
+ -Wempty-body, -Wsign-compare,
-Wmissing-field-initializers, -Wmissing-parameter-type
- -Wold-style-declaration, and -Woverride-init,
+ -Wold-style-declaration, -Woverride-init and -Wignored-qualifiers
but not if explicitly overridden. */
+ if (warn_type_limits == -1)
+ warn_type_limits = extra_warnings;
if (warn_clobbered == -1)
warn_clobbered = extra_warnings;
if (warn_empty_body == -1)
warn_old_style_declaration = extra_warnings;
if (warn_override_init == -1)
warn_override_init = extra_warnings;
+ if (warn_ignored_qualifiers == -1)
+ warn_ignored_qualifiers = extra_warnings;
/* -Wpointer_sign is disabled by default, but it is enabled if any
of -Wall or -pedantic are given. */
if (warn_pointer_sign == -1)
warn_pointer_sign = 0;
+ if (warn_strict_aliasing == -1)
+ warn_strict_aliasing = 0;
+ if (warn_strict_overflow == -1)
+ warn_strict_overflow = 0;
+
/* -Woverlength-strings is off by default, but is enabled by -pedantic.
It is never enabled in C++, as the minimum limit is not normative
in that standard. */
if (warn_overlength_strings == -1 || c_dialect_cxx ())
warn_overlength_strings = 0;
+ /* Wmain is enabled by default in C++ but not in C. */
+ /* Wmain is disabled by default for -ffreestanding (!flag_hosted),
+ even if -Wall was given (warn_main will be 2 if set by -Wall, 1
+ if set by -Wmain). */
+ if (warn_main == -1)
+ warn_main = (c_dialect_cxx () && flag_hosted) ? 1 : 0;
+ else if (warn_main == 2)
+ warn_main = flag_hosted ? 1 : 0;
+
+ /* In C, -Wconversion enables -Wsign-conversion (unless disabled
+ through -Wno-sign-conversion). While in C++,
+ -Wsign-conversion needs to be requested explicitly. */
+ if (warn_sign_conversion == -1)
+ warn_sign_conversion = (c_dialect_cxx ()) ? 0 : warn_conversion;
+
+
/* Special format checking options don't work without -Wformat; warn if
they are used. */
if (!warn_format)
"-Wformat-zero-length ignored without -Wformat");
warning (OPT_Wformat_nonliteral,
"-Wformat-nonliteral ignored without -Wformat");
+ warning (OPT_Wformat_contains_nul,
+ "-Wformat-contains-nul ignored without -Wformat");
warning (OPT_Wformat_security,
"-Wformat-security ignored without -Wformat");
}
if (warn_implicit_function_declaration == -1)
warn_implicit_function_declaration = flag_isoc99;
- /* C99 requires special handling of complex multiplication and division;
- -ffast-math and -fcx-limited-range are handled in process_options. */
- if (flag_isoc99)
- flag_complex_method = 2;
-
/* If we're allowing C++0x constructs, don't warn about C++0x
compatibility problems. */
- if (flag_cpp0x)
+ if (cxx_dialect == cxx0x)
warn_cxx0x_compat = 0;
if (flag_preprocess_only)
if (version_flag)
c_common_print_pch_checksum (stderr);
+ /* Has to wait until now so that cpplib has its hash table. */
+ init_pragma ();
+
if (flag_preprocess_only)
{
finish_options ();
return false;
}
- /* Has to wait until now so that cpplib has its hash table. */
- init_pragma ();
-
return true;
}
if (++i >= num_in_fnames)
break;
cpp_undef_all (parse_in);
+ cpp_clear_file_cache (parse_in);
this_input_filename
= cpp_read_main_file (parse_in, in_fnames[i]);
/* If an input file is missing, abandon further compilation.
if (flag_dump_macros == 'M')
flag_no_output = 1;
+ /* By default, -fdirectives-only implies -dD. This allows subsequent phases
+ to perform proper macro expansion. */
+ if (cpp_opts->directives_only && !cpp_opts->preprocessed && !flag_dump_macros)
+ flag_dump_macros = 'D';
+
/* Disable -dD, -dN and -dI if normal output is suppressed. Allow
-dM since at least glibc relies on -M -dM to work. */
/* Also, flag_no_output implies flag_no_line_commands, always. */
flag_dump_includes = 0;
flag_no_line_commands = 1;
}
+ else if (cpp_opts->deps.missing_files)
+ 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;
/* We want -Wno-long-long to override -pedantic -std=non-c99
and/or -Wtraditional, whatever the ordering. */
cpp_opts->warn_long_long
- = warn_long_long && ((!flag_isoc99 && pedantic) || warn_traditional);
+ = warn_long_long && ((pedantic
+ && (c_dialect_cxx ()
+ ? cxx_dialect == cxx98
+ : !flag_isoc99))
+ || warn_traditional);
/* Similarly with -Wno-variadic-macros. No check for c99 here, since
this also turns off warnings about GCCs extension. */
actually output the current directory? */
if (flag_working_directory == -1)
flag_working_directory = (debug_info_level != DINFO_LEVEL_NONE);
+
+ if (cpp_opts->directives_only)
+ {
+ if (warn_unused_macros)
+ error ("-fdirectives-only is incompatible with -Wunused_macros");
+ if (cpp_opts->traditional)
+ error ("-fdirectives-only is incompatible with -traditional");
+ }
}
/* Add include path with a prefix at the front of its name. */
size_t i;
cb_file_change (parse_in,
- linemap_add (&line_table, LC_RENAME, 0,
+ linemap_add (line_table, LC_RENAME, 0,
_("<built-in>"), 0));
cpp_init_builtins (parse_in, flag_hosted);
cpp_opts->warn_dollars = (cpp_opts->pedantic && !cpp_opts->c99);
cb_file_change (parse_in,
- linemap_add (&line_table, LC_RENAME, 0,
+ linemap_add (line_table, LC_RENAME, 0,
_("<command-line>"), 0));
for (i = 0; i < deferred_count; i++)
}
}
}
+ else if (cpp_opts->directives_only)
+ cpp_init_special_builtins (parse_in);
include_cursor = 0;
push_command_line_include ();
/* Set this here so the client can change the option if it wishes,
and after stacking the main file so we don't trace the main file. */
- line_table.trace_includes = cpp_opts->print_include_names;
+ line_table->trace_includes = cpp_opts->print_include_names;
}
}
flag_no_gnu_keywords = iso;
flag_no_nonansi_builtin = iso;
flag_iso = iso;
+ cxx_dialect = cxx98;
}
/* Set the C++ 0x working draft "standard" (without GNU extensions if ISO). */
flag_no_gnu_keywords = iso;
flag_no_nonansi_builtin = iso;
flag_iso = iso;
- flag_cpp0x = 1;
+ cxx_dialect = cxx0x;
}
/* Handle setting implicit to ON. */
case 'M': /* Dump macros only. */
case 'N': /* Dump names. */
case 'D': /* Dump definitions. */
+ case 'U': /* Dump used macros. */
flag_dump_macros = c;
break;
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