1 /* C/ObjC/C++ command line option handling.
2 Copyright (C) 2002, 2003 Free Software Foundation, Inc.
3 Contributed by Neil Booth.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
24 #include "coretypes.h"
31 #include "langhooks.h"
32 #include "tree-inline.h"
33 #include "diagnostic.h"
35 #include "cppdefault.h"
36 #include "c-incpath.h"
37 #include "debug.h" /* For debug_hooks. */
39 #ifndef TARGET_SYSTEM_ROOT
40 # define TARGET_SYSTEM_ROOT NULL
44 # define TARGET_EBCDIC 0
47 static int saved_lineno
;
50 static cpp_options
*cpp_opts
;
53 static const char *in_fname
;
55 /* Filename and stream for preprocessed output. */
56 static const char *out_fname
;
57 static FILE *out_stream
;
59 /* Append dependencies to deps_file. */
60 static bool deps_append
;
62 /* If dependency switches (-MF etc.) have been given. */
63 static bool deps_seen
;
68 /* Dependency output file. */
69 static const char *deps_file
;
71 /* The prefix given by -iprefix, if any. */
72 static const char *iprefix
;
74 /* The system root, if any. Overridden by -isysroot. */
75 static const char *sysroot
= TARGET_SYSTEM_ROOT
;
77 /* Zero disables all standard directories for headers. */
78 static bool std_inc
= true;
80 /* Zero disables the C++-specific standard directories for headers. */
81 static bool std_cxx_inc
= true;
83 /* If the quote chain has been split by -I-. */
84 static bool quote_chain_split
;
86 /* If -Wunused-macros. */
87 static bool warn_unused_macros
;
89 /* Number of deferred options, deferred options array size. */
90 static size_t deferred_count
, deferred_size
;
92 /* Number of deferred options scanned for -include. */
93 static size_t include_cursor
;
95 static void missing_arg
PARAMS ((size_t));
96 static size_t find_opt
PARAMS ((const char *, int));
97 static void set_Wimplicit
PARAMS ((int));
98 static void complain_wrong_lang
PARAMS ((size_t));
99 static void write_langs
PARAMS ((char *, int));
100 static void print_help
PARAMS ((void));
101 static void handle_OPT_d
PARAMS ((const char *));
102 static void set_std_cxx98
PARAMS ((int));
103 static void set_std_c89
PARAMS ((int, int));
104 static void set_std_c99
PARAMS ((int));
105 static void check_deps_environment_vars
PARAMS ((void));
106 static void handle_deferred_opts
PARAMS ((void));
107 static void sanitize_cpp_opts
PARAMS ((void));
108 static void add_prefixed_path
PARAMS ((const char *, size_t));
109 static void push_command_line_include
PARAMS ((void));
110 static void cb_file_change
PARAMS ((cpp_reader
*, const struct line_map
*));
111 static void finish_options
PARAMS ((void));
113 #ifndef STDC_0_IN_SYSTEM_HEADERS
114 #define STDC_0_IN_SYSTEM_HEADERS 0
117 #define CL_C_ONLY (1 << 0) /* Only C. */
118 #define CL_OBJC_ONLY (1 << 1) /* Only ObjC. */
119 #define CL_CXX_ONLY (1 << 2) /* Only C++. */
120 #define CL_OBJCXX_ONLY (1 << 3) /* Only ObjC++. */
121 #define CL_JOINED (1 << 4) /* If takes joined argument. */
122 #define CL_SEPARATE (1 << 5) /* If takes a separate argument. */
124 #define CL_ARG (CL_JOINED | CL_SEPARATE)
125 #define CL_C (CL_C_ONLY | CL_OBJC_ONLY)
126 #define CL_OBJC (CL_OBJC_ONLY | CL_OBJCXX_ONLY)
127 #define CL_CXX (CL_CXX_ONLY | CL_OBJCXX_ONLY)
128 #define CL_ALL (CL_C | CL_CXX)
130 /* This is the list of all command line options, with the leading "-"
131 removed. It must be sorted in ASCII collating order. All options
132 beginning with "f" or "W" are implicitly assumed to take a "no-"
133 form; this form should not be listed. The variable "on" is true if
134 the positive form is given, otherwise it is false. If you don't
135 want to allow a "no-" form, your handler should reject "on" being
136 false by returning zero. See, for example, the handling of
139 If the user gives an option to a front end that doesn't support it,
140 an error is output, mentioning which front ends the option is valid
141 for. If you don't want this, you must accept it for all front
142 ends, and test for the front end in the option handler. See, for
143 example, the handling of -Wno-strict-prototypes for C++.
145 If you request an argument with CL_JOINED, CL_SEPARATE or their
146 combination CL_ARG, it is stored in the variable "arg", which is
147 guaranteed to be non-NULL and to not be an empty string. It points
148 to the argument either within the argv[] vector or within one of
149 that vector's strings, and so the text is permanent and copies need
150 not be made. Be sure to add an error message in missing_arg() if
151 the default is not appropriate. */
153 #define COMMAND_LINE_OPTIONS \
154 OPT("-help", CL_ALL, OPT__help) \
155 OPT("-output-pch=", CL_ALL | CL_ARG, OPT__output_pch) \
156 OPT("A", CL_ALL | CL_ARG, OPT_A) \
157 OPT("C", CL_ALL, OPT_C) \
158 OPT("CC", CL_ALL, OPT_CC) \
159 OPT("D", CL_ALL | CL_ARG, OPT_D) \
160 OPT("E", CL_ALL, OPT_E) \
161 OPT("H", CL_ALL, OPT_H) \
162 OPT("I", CL_ALL | CL_ARG, OPT_I) \
163 OPT("M", CL_ALL, OPT_M) \
164 OPT("MD", CL_ALL | CL_SEPARATE, OPT_MD) \
165 OPT("MF", CL_ALL | CL_ARG, OPT_MF) \
166 OPT("MG", CL_ALL, OPT_MG) \
167 OPT("MM", CL_ALL, OPT_MM) \
168 OPT("MMD", CL_ALL | CL_SEPARATE, OPT_MMD) \
169 OPT("MP", CL_ALL, OPT_MP) \
170 OPT("MQ", CL_ALL | CL_ARG, OPT_MQ) \
171 OPT("MT", CL_ALL | CL_ARG, OPT_MT) \
172 OPT("P", CL_ALL, OPT_P) \
173 OPT("U", CL_ALL | CL_ARG, OPT_U) \
174 OPT("Wabi", CL_CXX, OPT_Wabi) \
175 OPT("Wall", CL_ALL, OPT_Wall) \
176 OPT("Wbad-function-cast", CL_C, OPT_Wbad_function_cast) \
177 OPT("Wcast-qual", CL_ALL, OPT_Wcast_qual) \
178 OPT("Wchar-subscripts", CL_ALL, OPT_Wchar_subscripts) \
179 OPT("Wcomment", CL_ALL, OPT_Wcomment) \
180 OPT("Wcomments", CL_ALL, OPT_Wcomments) \
181 OPT("Wconversion", CL_ALL, OPT_Wconversion) \
182 OPT("Wctor-dtor-privacy", CL_CXX, OPT_Wctor_dtor_privacy) \
183 OPT("Wdeprecated", CL_CXX, OPT_Wdeprecated) \
184 OPT("Wdiv-by-zero", CL_C, OPT_Wdiv_by_zero) \
185 OPT("Weffc++", CL_CXX, OPT_Weffcxx) \
186 OPT("Wendif-labels", CL_ALL, OPT_Wendif_labels) \
187 OPT("Werror", CL_ALL, OPT_Werror) \
188 OPT("Werror-implicit-function-declaration", \
189 CL_C, OPT_Werror_implicit_function_decl) \
190 OPT("Wfloat-equal", CL_ALL, OPT_Wfloat_equal) \
191 OPT("Wformat", CL_ALL, OPT_Wformat) \
192 OPT("Wformat-extra-args", CL_ALL, OPT_Wformat_extra_args) \
193 OPT("Wformat-nonliteral", CL_ALL, OPT_Wformat_nonliteral) \
194 OPT("Wformat-security", CL_ALL, OPT_Wformat_security) \
195 OPT("Wformat-y2k", CL_ALL, OPT_Wformat_y2k) \
196 OPT("Wformat-zero-length", CL_C, OPT_Wformat_zero_length) \
197 OPT("Wformat=", CL_ALL | CL_JOINED, OPT_Wformat_eq) \
198 OPT("Wimplicit", CL_ALL, OPT_Wimplicit) \
199 OPT("Wimplicit-function-declaration", CL_C, OPT_Wimplicit_function_decl) \
200 OPT("Wimplicit-int", CL_C, OPT_Wimplicit_int) \
201 OPT("Wimport", CL_ALL, OPT_Wimport) \
202 OPT("Winvalid-pch", CL_ALL, OPT_Winvalid_pch) \
203 OPT("Wlong-long", CL_ALL, OPT_Wlong_long) \
204 OPT("Wmain", CL_C, OPT_Wmain) \
205 OPT("Wmissing-braces", CL_ALL, OPT_Wmissing_braces) \
206 OPT("Wmissing-declarations", CL_C, OPT_Wmissing_declarations) \
207 OPT("Wmissing-format-attribute",CL_ALL, OPT_Wmissing_format_attribute) \
208 OPT("Wmissing-prototypes", CL_ALL, OPT_Wmissing_prototypes) \
209 OPT("Wmultichar", CL_ALL, OPT_Wmultichar) \
210 OPT("Wnested-externs", CL_C, OPT_Wnested_externs) \
211 OPT("Wnon-template-friend", CL_CXX, OPT_Wnon_template_friend) \
212 OPT("Wnon-virtual-dtor", CL_CXX, OPT_Wnon_virtual_dtor) \
213 OPT("Wnonnull", CL_C, OPT_Wnonnull) \
214 OPT("Wold-style-cast", CL_CXX, OPT_Wold_style_cast) \
215 OPT("Woverloaded-virtual", CL_CXX, OPT_Woverloaded_virtual) \
216 OPT("Wparentheses", CL_ALL, OPT_Wparentheses) \
217 OPT("Wpmf-conversions", CL_CXX, OPT_Wpmf_conversions) \
218 OPT("Wpointer-arith", CL_ALL, OPT_Wpointer_arith) \
219 OPT("Wprotocol", CL_OBJC, OPT_Wprotocol) \
220 OPT("Wredundant-decls", CL_ALL, OPT_Wredundant_decls) \
221 OPT("Wreorder", CL_CXX, OPT_Wreorder) \
222 OPT("Wreturn-type", CL_ALL, OPT_Wreturn_type) \
223 OPT("Wselector", CL_OBJC, OPT_Wselector) \
224 OPT("Wsequence-point", CL_C, OPT_Wsequence_point) \
225 OPT("Wsign-compare", CL_ALL, OPT_Wsign_compare) \
226 OPT("Wsign-promo", CL_CXX, OPT_Wsign_promo) \
227 OPT("Wstrict-prototypes", CL_ALL, OPT_Wstrict_prototypes) \
228 OPT("Wsynth", CL_CXX, OPT_Wsynth) \
229 OPT("Wsystem-headers", CL_ALL, OPT_Wsystem_headers) \
230 OPT("Wtraditional", CL_C, OPT_Wtraditional) \
231 OPT("Wtrigraphs", CL_ALL, OPT_Wtrigraphs) \
232 OPT("Wundeclared-selector", CL_OBJC, OPT_Wundeclared_selector) \
233 OPT("Wundef", CL_ALL, OPT_Wundef) \
234 OPT("Wunknown-pragmas", CL_ALL, OPT_Wunknown_pragmas) \
235 OPT("Wunused-macros", CL_ALL, OPT_Wunused_macros) \
236 OPT("Wwrite-strings", CL_ALL, OPT_Wwrite_strings) \
237 OPT("ansi", CL_ALL, OPT_ansi) \
238 OPT("d", CL_ALL | CL_JOINED, OPT_d) \
239 OPT("fabi-version=", CL_CXX | CL_JOINED, OPT_fabi_version) \
240 OPT("faccess-control", CL_CXX, OPT_faccess_control) \
241 OPT("fall-virtual", CL_CXX, OPT_fall_virtual) \
242 OPT("falt-external-templates",CL_CXX, OPT_falt_external_templates) \
243 OPT("fasm", CL_ALL, OPT_fasm) \
244 OPT("fbuiltin", CL_ALL, OPT_fbuiltin) \
245 OPT("fbuiltin-", CL_ALL | CL_JOINED, OPT_fbuiltin_) \
246 OPT("fcheck-new", CL_CXX, OPT_fcheck_new) \
247 OPT("fcond-mismatch", CL_ALL, OPT_fcond_mismatch) \
248 OPT("fconserve-space", CL_CXX, OPT_fconserve_space) \
249 OPT("fconst-strings", CL_CXX, OPT_fconst_strings) \
250 OPT("fconstant-string-class=", CL_OBJC | CL_JOINED, \
251 OPT_fconstant_string_class) \
252 OPT("fdefault-inline", CL_CXX, OPT_fdefault_inline) \
253 OPT("fdollars-in-identifiers",CL_ALL, OPT_fdollars_in_identifiers) \
254 OPT("fdump-", CL_ALL | CL_JOINED, OPT_fdump) \
255 OPT("felide-constructors", CL_CXX, OPT_felide_constructors) \
256 OPT("fenforce-eh-specs", CL_CXX, OPT_fenforce_eh_specs) \
257 OPT("fenum-int-equiv", CL_CXX, OPT_fenum_int_equiv) \
258 OPT("fexternal-templates", CL_CXX, OPT_fexternal_templates) \
259 OPT("ffixed-form", CL_C, OPT_ffixed_form) \
260 OPT("ffixed-line-length-", CL_C | CL_JOINED, OPT_ffixed_line_length) \
261 OPT("ffor-scope", CL_CXX, OPT_ffor_scope) \
262 OPT("ffreestanding", CL_C, OPT_ffreestanding) \
263 OPT("fgnu-keywords", CL_CXX, OPT_fgnu_keywords) \
264 OPT("fgnu-runtime", CL_OBJC, OPT_fgnu_runtime) \
265 OPT("fguiding-decls", CL_CXX, OPT_fguiding_decls) \
266 OPT("fhandle-exceptions", CL_CXX, OPT_fhandle_exceptions) \
267 OPT("fhonor-std", CL_CXX, OPT_fhonor_std) \
268 OPT("fhosted", CL_C, OPT_fhosted) \
269 OPT("fhuge-objects", CL_CXX, OPT_fhuge_objects) \
270 OPT("fimplement-inlines", CL_CXX, OPT_fimplement_inlines) \
271 OPT("fimplicit-inline-templates", CL_CXX, OPT_fimplicit_inline_templates) \
272 OPT("fimplicit-templates", CL_CXX, OPT_fimplicit_templates) \
273 OPT("flabels-ok", CL_CXX, OPT_flabels_ok) \
274 OPT("fms-extensions", CL_ALL, OPT_fms_extensions) \
275 OPT("fname-mangling-version-",CL_CXX | CL_JOINED, OPT_fname_mangling) \
276 OPT("fnew-abi", CL_CXX, OPT_fnew_abi) \
277 OPT("fnext-runtime", CL_OBJC, OPT_fnext_runtime) \
278 OPT("fnonansi-builtins", CL_CXX, OPT_fnonansi_builtins) \
279 OPT("fnonnull-objects", CL_CXX, OPT_fnonnull_objects) \
280 OPT("foperator-names", CL_CXX, OPT_foperator_names) \
281 OPT("foptional-diags", CL_CXX, OPT_foptional_diags) \
282 OPT("fpch-deps", CL_ALL, OPT_fpch_deps) \
283 OPT("fpermissive", CL_CXX, OPT_fpermissive) \
284 OPT("fpreprocessed", CL_ALL, OPT_fpreprocessed) \
285 OPT("frepo", CL_CXX, OPT_frepo) \
286 OPT("frtti", CL_CXX, OPT_frtti) \
287 OPT("fshort-double", CL_ALL, OPT_fshort_double) \
288 OPT("fshort-enums", CL_ALL, OPT_fshort_enums) \
289 OPT("fshort-wchar", CL_ALL, OPT_fshort_wchar) \
290 OPT("fshow-column", CL_ALL, OPT_fshow_column) \
291 OPT("fsigned-bitfields", CL_ALL, OPT_fsigned_bitfields) \
292 OPT("fsigned-char", CL_ALL, OPT_fsigned_char) \
293 OPT("fsquangle", CL_CXX, OPT_fsquangle) \
294 OPT("fstats", CL_CXX, OPT_fstats) \
295 OPT("fstrict-prototype", CL_CXX, OPT_fstrict_prototype) \
296 OPT("ftabstop=", CL_ALL | CL_JOINED, OPT_ftabstop) \
297 OPT("ftemplate-depth-", CL_CXX | CL_JOINED, OPT_ftemplate_depth) \
298 OPT("fthis-is-variable", CL_CXX, OPT_fthis_is_variable) \
299 OPT("funsigned-bitfields", CL_ALL, OPT_funsigned_bitfields) \
300 OPT("funsigned-char", CL_ALL, OPT_funsigned_char) \
301 OPT("fuse-cxa-atexit", CL_CXX, OPT_fuse_cxa_atexit) \
302 OPT("fvtable-gc", CL_CXX, OPT_fvtable_gc) \
303 OPT("fvtable-thunks", CL_CXX, OPT_fvtable_thunks) \
304 OPT("fweak", CL_CXX, OPT_fweak) \
305 OPT("fxref", CL_CXX, OPT_fxref) \
306 OPT("gen-decls", CL_OBJC, OPT_gen_decls) \
307 OPT("idirafter", CL_ALL | CL_ARG, OPT_idirafter) \
308 OPT("imacros", CL_ALL | CL_ARG, OPT_imacros) \
309 OPT("include", CL_ALL | CL_ARG, OPT_include) \
310 OPT("iprefix", CL_ALL | CL_ARG, OPT_iprefix) \
311 OPT("isysroot", CL_ALL | CL_ARG, OPT_isysroot) \
312 OPT("isystem", CL_ALL | CL_ARG, OPT_isystem) \
313 OPT("iwithprefix", CL_ALL | CL_ARG, OPT_iwithprefix) \
314 OPT("iwithprefixbefore", CL_ALL | CL_ARG, OPT_iwithprefixbefore) \
315 OPT("lang-asm", CL_C_ONLY, OPT_lang_asm) \
316 OPT("lang-objc", CL_ALL, OPT_lang_objc) \
317 OPT("nostdinc", CL_ALL, OPT_nostdinc) \
318 OPT("nostdinc++", CL_ALL, OPT_nostdincplusplus) \
319 OPT("o", CL_ALL | CL_ARG, OPT_o) \
320 OPT("pedantic", CL_ALL, OPT_pedantic) \
321 OPT("pedantic-errors", CL_ALL, OPT_pedantic_errors) \
322 OPT("print-objc-runtime-info", CL_OBJC, OPT_print_objc_runtime_info) \
323 OPT("remap", CL_ALL, OPT_remap) \
324 OPT("std=c++98", CL_CXX, OPT_std_cplusplus98) \
325 OPT("std=c89", CL_C, OPT_std_c89) \
326 OPT("std=c99", CL_C, OPT_std_c99) \
327 OPT("std=c9x", CL_C, OPT_std_c9x) \
328 OPT("std=gnu++98", CL_CXX, OPT_std_gnuplusplus98) \
329 OPT("std=gnu89", CL_C, OPT_std_gnu89) \
330 OPT("std=gnu99", CL_C, OPT_std_gnu99) \
331 OPT("std=gnu9x", CL_C, OPT_std_gnu9x) \
332 OPT("std=iso9899:1990", CL_C, OPT_std_iso9899_1990) \
333 OPT("std=iso9899:199409", CL_C, OPT_std_iso9899_199409) \
334 OPT("std=iso9899:1999", CL_C, OPT_std_iso9899_1999) \
335 OPT("std=iso9899:199x", CL_C, OPT_std_iso9899_199x) \
336 OPT("traditional-cpp", CL_ALL, OPT_traditional_cpp) \
337 OPT("trigraphs", CL_ALL, OPT_trigraphs) \
338 OPT("undef", CL_ALL, OPT_undef) \
339 OPT("v", CL_ALL, OPT_v) \
340 OPT("w", CL_ALL, OPT_w)
342 #define OPT(text, flags, code) code,
352 const char *opt_text
;
353 unsigned char opt_len
;
355 ENUM_BITFIELD (opt_code
) opt_code
: 2 * CHAR_BIT
;
358 #define OPT(text, flags, code) { text, sizeof(text) - 1, flags, code },
360 static struct cl_option cl_options
[] =
362 static const struct cl_option cl_options
[] =
368 #undef COMMAND_LINE_OPTIONS
370 /* Holds switches parsed by c_common_decode_option (), but whose
371 handling is deferred to c_common_post_options (). */
372 static void defer_opt
PARAMS ((enum opt_code
, const char *));
373 static struct deferred_opt
381 static int opt_comp
PARAMS ((const void *, const void *));
383 /* Run-time sorting of options array. */
388 return strcmp (((struct cl_option
*) p1
)->opt_text
,
389 ((struct cl_option
*) p2
)->opt_text
);
393 /* Complain that switch OPT_INDEX expects an argument but none was
396 missing_arg (opt_index
)
399 const char *opt_text
= cl_options
[opt_index
].opt_text
;
401 switch (cl_options
[opt_index
].opt_code
)
403 case OPT__output_pch
:
406 case OPT_fabi_version
:
409 case OPT_fname_mangling
:
411 case OPT_ftemplate_depth
:
413 case OPT_iwithprefix
:
414 case OPT_iwithprefixbefore
:
416 error ("missing argument to \"-%s\"", opt_text
);
419 case OPT_fconstant_string_class
:
420 error ("no class name specified with \"-%s\"", opt_text
);
424 error ("assertion missing after \"-%s\"", opt_text
);
429 error ("macro name missing after \"-%s\"", opt_text
);
436 error ("missing path after \"-%s\"", opt_text
);
445 error ("missing filename after \"-%s\"", opt_text
);
450 error ("missing target after \"-%s\"", opt_text
);
455 /* Perform a binary search to find which option the command-line INPUT
456 matches. Returns its index in the option array, and N_OPTS on
459 Complications arise since some options can be suffixed with an
460 argument, and multiple complete matches can occur, e.g. -pedantic
461 and -pedantic-errors. Also, some options are only accepted by some
462 languages. If a switch matches for a different language and
463 doesn't match any alternatives for the true front end, the index of
464 the matched switch is returned anyway. The caller should check for
467 find_opt (input
, lang_flag
)
473 size_t result
= N_OPTS
;
483 opt_len
= cl_options
[md
].opt_len
;
484 comp
= strncmp (input
, cl_options
[md
].opt_text
, opt_len
);
492 /* The switch matches. It it an exact match? */
493 if (input
[opt_len
] == '\0')
499 /* If the switch takes no arguments this is not a proper
500 match, so we continue the search (e.g. input="stdc++"
501 match was "stdc"). */
502 if (!(cl_options
[md
].flags
& CL_JOINED
))
505 /* Is this switch valid for this front end? */
506 if (!(cl_options
[md
].flags
& lang_flag
))
508 /* If subsequently we don't find a better match,
509 return this and let the caller report it as a bad
515 /* Two scenarios remain: we have the switch's argument,
516 or we match a longer option. This can happen with
517 -iwithprefix and -withprefixbefore. The longest
518 possible option match succeeds.
520 Scan forwards, and return an exact match. Otherwise
521 return the longest valid option-accepting match (mx).
522 This loops at most twice with current options. */
524 for (md
= md
+ 1; md
< (size_t) N_OPTS
; md
++)
526 opt_len
= cl_options
[md
].opt_len
;
527 if (strncmp (input
, cl_options
[md
].opt_text
, opt_len
))
529 if (input
[opt_len
] == '\0')
531 if (cl_options
[md
].flags
& lang_flag
532 && cl_options
[md
].flags
& CL_JOINED
)
544 /* Defer option CODE with argument ARG. */
546 defer_opt (code
, arg
)
550 /* FIXME: this should be in c_common_init_options, which should take
554 extern int save_argc
;
555 deferred_size
= save_argc
;
556 deferred_opts
= (struct deferred_opt
*)
557 xmalloc (deferred_size
* sizeof (struct deferred_opt
));
560 if (deferred_count
== deferred_size
)
563 deferred_opts
[deferred_count
].code
= code
;
564 deferred_opts
[deferred_count
].arg
= arg
;
568 /* Common initialization before parsing options. */
570 c_common_init_options (lang
)
571 enum c_language_kind lang
;
574 /* For non-ASCII hosts, the cl_options array needs to be sorted at
576 qsort (cl_options
, N_OPTS
, sizeof (struct cl_option
), opt_comp
);
582 for (i
= 1; i
< N_OPTS
; i
++)
583 if (strcmp (cl_options
[i
- 1].opt_text
, cl_options
[i
].opt_text
) >= 0)
584 error ("options array incorrectly sorted: %s is before %s",
585 cl_options
[i
- 1].opt_text
, cl_options
[i
].opt_text
);
590 parse_in
= cpp_create_reader (lang
== clk_c
? CLK_GNUC89
: CLK_GNUCXX
,
592 cpp_opts
= cpp_get_options (parse_in
);
596 flag_const_strings
= (lang
== clk_cplusplus
);
597 warn_pointer_arith
= (lang
== clk_cplusplus
);
599 warn_sign_compare
= -1;
602 /* Handle one command-line option in (argc, argv).
603 Can be called multiple times, to handle multiple sets of options.
604 Returns number of strings consumed. */
606 c_common_decode_option (argc
, argv
)
610 static const int lang_flags
[] = {CL_C_ONLY
, CL_C
, CL_CXX_ONLY
, CL_CXX
};
612 const char *opt
, *arg
= 0;
615 int result
= 0, lang_flag
;
616 const struct cl_option
*option
;
621 /* Interpret "-" or a non-switch as a file name. */
622 if (opt
[0] != '-' || opt
[1] == '\0')
630 error ("too many filenames given. Type %s --help for usage",
638 /* Drop the "no-" from negative switches. */
639 if ((opt
[1] == 'W' || opt
[1] == 'f')
640 && opt
[2] == 'n' && opt
[3] == 'o' && opt
[4] == '-')
642 size_t len
= strlen (opt
) - 3;
644 dup
= xmalloc (len
+ 1);
647 memcpy (dup
+ 2, opt
+ 5, len
- 2 + 1);
653 lang_flag
= lang_flags
[(c_language
<< 1) + flag_objc
];
654 opt_index
= find_opt (opt
+ 1, lang_flag
);
655 if (opt_index
== N_OPTS
)
659 option
= &cl_options
[opt_index
];
661 /* Sort out any argument the switch takes. */
662 if (option
->flags
& CL_ARG
)
664 if (option
->flags
& CL_JOINED
)
666 /* Have arg point to the original switch. This is because
667 some code, such as disable_builtin_function, expects its
668 argument to be persistent until the program exits. */
669 arg
= argv
[0] + cl_options
[opt_index
].opt_len
+ 1;
671 arg
+= strlen ("no-");
674 /* If we don't have an argument, and CL_SEPARATE, try the next
675 argument in the vector. */
676 if (!arg
|| (*arg
== '\0' && option
->flags
& CL_SEPARATE
))
682 if (!arg
|| *arg
== '\0')
684 missing_arg (opt_index
);
690 /* Complain about the wrong language after we've swallowed any
691 necessary extra argument. Eventually make this a hard error
692 after the call to find_opt, and return argc. */
693 if (!(cl_options
[opt_index
].flags
& lang_flag
))
695 complain_wrong_lang (opt_index
);
699 switch (code
= option
->opt_code
)
701 case N_OPTS
: /* Shut GCC up. */
708 case OPT__output_pch
:
713 defer_opt (code
, arg
);
717 cpp_opts
->discard_comments
= 0;
721 cpp_opts
->discard_comments
= 0;
722 cpp_opts
->discard_comments_in_macro_exp
= 0;
726 defer_opt (code
, arg
);
730 flag_preprocess_only
= 1;
734 cpp_opts
->print_include_names
= 1;
738 if (strcmp (arg
, "-"))
739 add_path (xstrdup (arg
), BRACKET
, 0);
742 if (quote_chain_split
)
743 error ("-I- specified twice");
744 quote_chain_split
= true;
745 split_quote_chain ();
751 /* When doing dependencies with -M or -MM, suppress normal
752 preprocessed output, but still do -dM etc. as software
753 depends on this. Preprocessed output does occur if -MD, -MMD
754 or environment var dependency generation is used. */
755 cpp_opts
->deps
.style
= (code
== OPT_M
? DEPS_SYSTEM
: DEPS_USER
);
757 cpp_opts
->inhibit_warnings
= 1;
762 cpp_opts
->deps
.style
= (code
== OPT_MD
? DEPS_SYSTEM
: DEPS_USER
);
773 cpp_opts
->deps
.missing_files
= true;
778 cpp_opts
->deps
.phony_targets
= true;
784 defer_opt (code
, arg
);
788 flag_no_line_commands
= 1;
792 defer_opt (code
, arg
);
803 warn_char_subscripts
= on
;
804 warn_missing_braces
= on
;
805 warn_parentheses
= on
;
806 warn_return_type
= on
;
807 warn_sequence_point
= on
; /* Was C only. */
808 warn_sign_compare
= on
; /* Was C++ only. */
810 warn_strict_aliasing
= on
;
812 /* Only warn about unknown pragmas that are not in system
814 warn_unknown_pragmas
= on
;
816 /* We save the value of warn_uninitialized, since if they put
817 -Wuninitialized on the command line, we need to generate a
818 warning about not using it without also specifying -O. */
819 if (warn_uninitialized
!= 1)
820 warn_uninitialized
= (on
? 2 : 0);
822 if (c_language
== clk_c
)
823 /* We set this to 2 here, but 1 in -Wmain, so -ffreestanding
824 can turn it off only if it's not explicit. */
828 /* C++-specific warnings. */
829 warn_ctor_dtor_privacy
= on
;
832 warn_nontemplate_friend
= on
;
835 cpp_opts
->warn_trigraphs
= on
;
836 cpp_opts
->warn_comments
= on
;
837 cpp_opts
->warn_num_sign_change
= on
;
838 cpp_opts
->warn_multichar
= on
; /* Was C++ only. */
841 case OPT_Wbad_function_cast
:
842 warn_bad_function_cast
= on
;
849 case OPT_Wchar_subscripts
:
850 warn_char_subscripts
= on
;
855 cpp_opts
->warn_comments
= on
;
858 case OPT_Wconversion
:
859 warn_conversion
= on
;
862 case OPT_Wctor_dtor_privacy
:
863 warn_ctor_dtor_privacy
= on
;
866 case OPT_Wdeprecated
:
867 warn_deprecated
= on
;
868 cpp_opts
->warn_deprecated
= on
;
871 case OPT_Wdiv_by_zero
:
872 warn_div_by_zero
= on
;
879 case OPT_Wendif_labels
:
880 cpp_opts
->warn_endif_labels
= on
;
884 cpp_opts
->warnings_are_errors
= on
;
887 case OPT_Werror_implicit_function_decl
:
891 mesg_implicit_function_declaration
= 2;
894 case OPT_Wfloat_equal
:
895 warn_float_equal
= on
;
903 set_Wformat (atoi (arg
));
906 case OPT_Wformat_extra_args
:
907 warn_format_extra_args
= on
;
910 case OPT_Wformat_nonliteral
:
911 warn_format_nonliteral
= on
;
914 case OPT_Wformat_security
:
915 warn_format_security
= on
;
918 case OPT_Wformat_y2k
:
919 warn_format_y2k
= on
;
922 case OPT_Wformat_zero_length
:
923 warn_format_zero_length
= on
;
930 case OPT_Wimplicit_function_decl
:
931 mesg_implicit_function_declaration
= on
;
934 case OPT_Wimplicit_int
:
935 warn_implicit_int
= on
;
939 cpp_opts
->warn_import
= on
;
942 case OPT_Winvalid_pch
:
943 cpp_opts
->warn_invalid_pch
= on
;
957 case OPT_Wmissing_braces
:
958 warn_missing_braces
= on
;
961 case OPT_Wmissing_declarations
:
962 warn_missing_declarations
= on
;
965 case OPT_Wmissing_format_attribute
:
966 warn_missing_format_attribute
= on
;
969 case OPT_Wmissing_prototypes
:
970 warn_missing_prototypes
= on
;
974 cpp_opts
->warn_multichar
= on
;
977 case OPT_Wnested_externs
:
978 warn_nested_externs
= on
;
981 case OPT_Wnon_template_friend
:
982 warn_nontemplate_friend
= on
;
985 case OPT_Wnon_virtual_dtor
:
993 case OPT_Wold_style_cast
:
994 warn_old_style_cast
= on
;
997 case OPT_Woverloaded_virtual
:
998 warn_overloaded_virtual
= on
;
1001 case OPT_Wparentheses
:
1002 warn_parentheses
= on
;
1005 case OPT_Wpmf_conversions
:
1009 case OPT_Wpointer_arith
:
1010 warn_pointer_arith
= on
;
1021 case OPT_Wredundant_decls
:
1022 warn_redundant_decls
= on
;
1029 case OPT_Wreturn_type
:
1030 warn_return_type
= on
;
1033 case OPT_Wsequence_point
:
1034 warn_sequence_point
= on
;
1037 case OPT_Wsign_compare
:
1038 warn_sign_compare
= on
;
1041 case OPT_Wsign_promo
:
1042 warn_sign_promo
= on
;
1045 case OPT_Wstrict_prototypes
:
1046 if (!on
&& c_language
== clk_cplusplus
)
1047 warning ("-Wno-strict-prototypes is not supported in C++");
1049 warn_strict_prototypes
= on
;
1056 case OPT_Wsystem_headers
:
1057 cpp_opts
->warn_system_headers
= on
;
1060 case OPT_Wtraditional
:
1061 warn_traditional
= on
;
1062 cpp_opts
->warn_traditional
= on
;
1065 case OPT_Wtrigraphs
:
1066 cpp_opts
->warn_trigraphs
= on
;
1069 case OPT_Wundeclared_selector
:
1070 warn_undeclared_selector
= on
;
1074 cpp_opts
->warn_undef
= on
;
1077 case OPT_Wunknown_pragmas
:
1078 /* Set to greater than 1, so that even unknown pragmas in
1079 system headers will be warned about. */
1080 warn_unknown_pragmas
= on
* 2;
1083 case OPT_Wunused_macros
:
1084 warn_unused_macros
= on
;
1087 case OPT_Wwrite_strings
:
1088 if (c_language
== clk_c
)
1089 flag_const_strings
= on
;
1091 warn_write_strings
= on
;
1095 if (c_language
== clk_c
)
1096 set_std_c89 (false, true);
1098 set_std_cxx98 (true);
1105 case OPT_fcond_mismatch
:
1106 if (c_language
== clk_c
)
1108 flag_cond_mismatch
= on
;
1113 case OPT_fall_virtual
:
1114 case OPT_fenum_int_equiv
:
1115 case OPT_fguiding_decls
:
1116 case OPT_fhonor_std
:
1117 case OPT_fhuge_objects
:
1118 case OPT_flabels_ok
:
1119 case OPT_fname_mangling
:
1121 case OPT_fnonnull_objects
:
1123 case OPT_fstrict_prototype
:
1124 case OPT_fthis_is_variable
:
1125 case OPT_fvtable_thunks
:
1127 warning ("switch \"%s\" is no longer supported", argv
[0]);
1130 case OPT_fabi_version
:
1131 flag_abi_version
= read_integral_parameter (arg
, argv
[0], 1);
1134 case OPT_faccess_control
:
1135 flag_access_control
= on
;
1138 case OPT_falt_external_templates
:
1139 flag_alt_external_templates
= on
;
1141 flag_external_templates
= true;
1143 warning ("switch \"%s\" is deprecated, please see documentation for details", argv
[0]);
1151 flag_no_builtin
= !on
;
1158 disable_builtin_function (arg
);
1161 case OPT_fdollars_in_identifiers
:
1162 dollars_in_ident
= on
;
1166 if (!on
|| !dump_switch_p (argv
[0] + strlen ("-f")))
1170 case OPT_ffreestanding
:
1172 /* Fall through... */
1175 flag_no_builtin
= !on
;
1176 /* warn_main will be 2 if set by -Wall, 1 if set by -Wmain */
1177 if (!on
&& warn_main
== 2)
1181 case OPT_fshort_double
:
1182 flag_short_double
= on
;
1185 case OPT_fshort_enums
:
1186 flag_short_enums
= on
;
1189 case OPT_fshort_wchar
:
1190 flag_short_wchar
= on
;
1193 case OPT_fsigned_bitfields
:
1194 flag_signed_bitfields
= on
;
1195 explicit_flag_signed_bitfields
= 1;
1198 case OPT_fsigned_char
:
1199 flag_signed_char
= on
;
1202 case OPT_funsigned_bitfields
:
1203 flag_signed_bitfields
= !on
;
1204 explicit_flag_signed_bitfields
= 1;
1207 case OPT_funsigned_char
:
1208 flag_signed_char
= !on
;
1211 case OPT_fcheck_new
:
1212 flag_check_new
= on
;
1215 case OPT_fconserve_space
:
1216 flag_conserve_space
= on
;
1219 case OPT_fconst_strings
:
1220 flag_const_strings
= on
;
1223 case OPT_fconstant_string_class
:
1224 constant_string_class_name
= arg
;
1227 case OPT_fdefault_inline
:
1228 flag_default_inline
= on
;
1231 case OPT_felide_constructors
:
1232 flag_elide_constructors
= on
;
1235 case OPT_fenforce_eh_specs
:
1236 flag_enforce_eh_specs
= on
;
1239 case OPT_fexternal_templates
:
1240 flag_external_templates
= on
;
1243 case OPT_ffixed_form
:
1244 case OPT_ffixed_line_length
:
1245 /* Fortran front end options ignored when preprocessing only. */
1246 if (flag_preprocess_only
)
1250 case OPT_ffor_scope
:
1251 flag_new_for_scope
= on
;
1254 case OPT_fgnu_keywords
:
1255 flag_no_gnu_keywords
= !on
;
1258 case OPT_fgnu_runtime
:
1259 flag_next_runtime
= !on
;
1262 case OPT_fhandle_exceptions
:
1263 warning ("-fhandle-exceptions has been renamed to -fexceptions (and is now on by default)");
1264 flag_exceptions
= on
;
1267 case OPT_fimplement_inlines
:
1268 flag_implement_inlines
= on
;
1271 case OPT_fimplicit_inline_templates
:
1272 flag_implicit_inline_templates
= on
;
1275 case OPT_fimplicit_templates
:
1276 flag_implicit_templates
= on
;
1279 case OPT_fms_extensions
:
1280 flag_ms_extensions
= on
;
1283 case OPT_fnext_runtime
:
1284 flag_next_runtime
= on
;
1287 case OPT_fnonansi_builtins
:
1288 flag_no_nonansi_builtin
= !on
;
1291 case OPT_foperator_names
:
1292 cpp_opts
->operator_names
= on
;
1295 case OPT_foptional_diags
:
1296 flag_optional_diags
= on
;
1300 cpp_opts
->restore_pch_deps
= on
;
1303 case OPT_fpermissive
:
1304 flag_permissive
= on
;
1307 case OPT_fpreprocessed
:
1308 cpp_opts
->preprocessed
= on
;
1312 flag_use_repository
= on
;
1314 flag_implicit_templates
= 0;
1321 case OPT_fshow_column
:
1322 cpp_opts
->show_column
= on
;
1326 flag_detailed_statistics
= on
;
1330 /* Don't recognize -fno-tabstop=. */
1334 /* It is documented that we silently ignore silly values. */
1337 long tabstop
= strtol (arg
, &endptr
, 10);
1338 if (*endptr
== '\0' && tabstop
>= 1 && tabstop
<= 100)
1339 cpp_opts
->tabstop
= tabstop
;
1343 case OPT_ftemplate_depth
:
1344 max_tinst_depth
= read_integral_parameter (arg
, argv
[0], 0);
1347 case OPT_fvtable_gc
:
1348 flag_vtable_gc
= on
;
1351 case OPT_fuse_cxa_atexit
:
1352 flag_use_cxa_atexit
= on
;
1360 flag_gen_declaration
= 1;
1364 add_path (xstrdup (arg
), AFTER
, 0);
1369 defer_opt (code
, arg
);
1381 add_path (xstrdup (arg
), SYSTEM
, 0);
1384 case OPT_iwithprefix
:
1385 add_prefixed_path (arg
, SYSTEM
);
1388 case OPT_iwithprefixbefore
:
1389 add_prefixed_path (arg
, BRACKET
);
1393 cpp_set_lang (parse_in
, CLK_ASM
);
1404 case OPT_nostdincplusplus
:
1405 std_cxx_inc
= false;
1413 error ("output filename specified twice");
1418 /* We need to handle the -pedantic switches here, rather than in
1419 c_common_post_options, so that a subsequent -Wno-endif-labels
1420 is not overridden. */
1421 case OPT_pedantic_errors
:
1422 cpp_opts
->pedantic_errors
= 1;
1425 cpp_opts
->pedantic
= 1;
1426 cpp_opts
->warn_endif_labels
= 1;
1429 case OPT_print_objc_runtime_info
:
1430 print_struct_values
= 1;
1434 cpp_opts
->remap
= 1;
1437 case OPT_std_cplusplus98
:
1438 case OPT_std_gnuplusplus98
:
1439 set_std_cxx98 (code
== OPT_std_cplusplus98
/* ISO */);
1443 case OPT_std_iso9899_1990
:
1444 case OPT_std_iso9899_199409
:
1445 set_std_c89 (code
== OPT_std_iso9899_199409
/* c94 */, true /* ISO */);
1449 set_std_c89 (false /* c94 */, false /* ISO */);
1454 case OPT_std_iso9899_1999
:
1455 case OPT_std_iso9899_199x
:
1456 set_std_c99 (true /* ISO */);
1461 set_std_c99 (false /* ISO */);
1465 cpp_opts
->trigraphs
= 1;
1468 case OPT_traditional_cpp
:
1469 cpp_opts
->traditional
= 1;
1477 cpp_opts
->inhibit_warnings
= 1;
1491 /* Post-switch processing. */
1493 c_common_post_options (pfilename
)
1494 const char **pfilename
;
1496 /* Canonicalize the input and output filenames. */
1497 if (in_fname
== NULL
|| !strcmp (in_fname
, "-"))
1500 if (out_fname
== NULL
|| !strcmp (out_fname
, "-"))
1503 if (cpp_opts
->deps
.style
== DEPS_NONE
)
1504 check_deps_environment_vars ();
1506 handle_deferred_opts ();
1508 sanitize_cpp_opts ();
1510 register_include_chains (parse_in
, sysroot
, iprefix
,
1511 std_inc
, std_cxx_inc
&& c_language
== clk_cplusplus
,
1514 flag_inline_trees
= 1;
1516 /* Use tree inlining if possible. Function instrumentation is only
1517 done in the RTL level, so we disable tree inlining. */
1518 if (! flag_instrument_function_entry_exit
)
1520 if (!flag_no_inline
)
1522 if (flag_inline_functions
)
1524 flag_inline_trees
= 2;
1525 flag_inline_functions
= 0;
1529 /* Special format checking options don't work without -Wformat; warn if
1531 if (warn_format_y2k
&& !warn_format
)
1532 warning ("-Wformat-y2k ignored without -Wformat");
1533 if (warn_format_extra_args
&& !warn_format
)
1534 warning ("-Wformat-extra-args ignored without -Wformat");
1535 if (warn_format_zero_length
&& !warn_format
)
1536 warning ("-Wformat-zero-length ignored without -Wformat");
1537 if (warn_format_nonliteral
&& !warn_format
)
1538 warning ("-Wformat-nonliteral ignored without -Wformat");
1539 if (warn_format_security
&& !warn_format
)
1540 warning ("-Wformat-security ignored without -Wformat");
1541 if (warn_missing_format_attribute
&& !warn_format
)
1542 warning ("-Wmissing-format-attribute ignored without -Wformat");
1544 if (flag_preprocess_only
)
1546 /* Open the output now. We must do so even if flag_no_output is
1547 on, because there may be other output than from the actual
1548 preprocessing (e.g. from -dM). */
1549 if (out_fname
[0] == '\0')
1550 out_stream
= stdout
;
1552 out_stream
= fopen (out_fname
, "w");
1554 if (out_stream
== NULL
)
1556 fatal_io_error ("opening output file %s", out_fname
);
1560 init_pp_output (out_stream
);
1566 /* Yuk. WTF is this? I do know ObjC relies on it somewhere. */
1570 cpp_get_callbacks (parse_in
)->file_change
= cb_file_change
;
1572 /* NOTE: we use in_fname here, not the one supplied. */
1573 *pfilename
= cpp_read_main_file (parse_in
, in_fname
);
1575 saved_lineno
= lineno
;
1578 /* If an error has occurred in cpplib, note it so we fail
1580 errorcount
+= cpp_errors (parse_in
);
1582 return flag_preprocess_only
;
1585 /* Front end initialization common to C, ObjC and C++. */
1589 lineno
= saved_lineno
;
1591 /* Set up preprocessor arithmetic. Must be done after call to
1592 c_common_nodes_and_builtins for type nodes to be good. */
1593 cpp_opts
->precision
= TYPE_PRECISION (intmax_type_node
);
1594 cpp_opts
->char_precision
= TYPE_PRECISION (char_type_node
);
1595 cpp_opts
->int_precision
= TYPE_PRECISION (integer_type_node
);
1596 cpp_opts
->wchar_precision
= TYPE_PRECISION (wchar_type_node
);
1597 cpp_opts
->unsigned_wchar
= TREE_UNSIGNED (wchar_type_node
);
1598 cpp_opts
->EBCDIC
= TARGET_EBCDIC
;
1600 if (flag_preprocess_only
)
1603 preprocess_file (parse_in
);
1607 /* Has to wait until now so that cpplib has its hash table. */
1613 /* A thin wrapper around the real parser that initializes the
1614 integrated preprocessor after debug output has been initialized.
1615 Also, make sure the start_source_file debug hook gets called for
1616 the primary source file. */
1618 c_common_parse_file (set_yydebug
)
1619 int set_yydebug ATTRIBUTE_UNUSED
;
1622 yydebug
= set_yydebug
;
1624 warning ("YYDEBUG not defined");
1627 (*debug_hooks
->start_source_file
) (lineno
, input_filename
);
1631 free_parser_stacks ();
1634 /* Common finish hook for the C, ObjC and C++ front ends. */
1638 FILE *deps_stream
= NULL
;
1640 if (cpp_opts
->deps
.style
!= DEPS_NONE
)
1642 /* If -M or -MM was seen without -MF, default output to the
1645 deps_stream
= out_stream
;
1648 deps_stream
= fopen (deps_file
, deps_append
? "a": "w");
1650 fatal_io_error ("opening dependency file %s", deps_file
);
1654 /* For performance, avoid tearing down cpplib's internal structures
1655 with cpp_destroy (). */
1656 errorcount
+= cpp_finish (parse_in
, deps_stream
);
1658 if (deps_stream
&& deps_stream
!= out_stream
1659 && (ferror (deps_stream
) || fclose (deps_stream
)))
1660 fatal_io_error ("closing dependency file %s", deps_file
);
1662 if (out_stream
&& (ferror (out_stream
) || fclose (out_stream
)))
1663 fatal_io_error ("when writing output to %s", out_fname
);
1666 /* Either of two environment variables can specify output of
1667 dependencies. Their value is either "OUTPUT_FILE" or "OUTPUT_FILE
1668 DEPS_TARGET", where OUTPUT_FILE is the file to write deps info to
1669 and DEPS_TARGET is the target to mention in the deps. They also
1670 result in dependency information being appended to the output file
1671 rather than overwriting it, and like Sun's compiler
1672 SUNPRO_DEPENDENCIES suppresses the dependency on the main file. */
1674 check_deps_environment_vars ()
1678 GET_ENVIRONMENT (spec
, "DEPENDENCIES_OUTPUT");
1680 cpp_opts
->deps
.style
= DEPS_USER
;
1683 GET_ENVIRONMENT (spec
, "SUNPRO_DEPENDENCIES");
1686 cpp_opts
->deps
.style
= DEPS_SYSTEM
;
1687 cpp_opts
->deps
.ignore_main_file
= true;
1693 /* Find the space before the DEPS_TARGET, if there is one. */
1694 char *s
= strchr (spec
, ' ');
1697 /* Let the caller perform MAKE quoting. */
1698 defer_opt (OPT_MT
, s
+ 1);
1702 /* Command line -MF overrides environment variables and default. */
1710 /* Handle deferred command line switches. */
1712 handle_deferred_opts ()
1716 for (i
= 0; i
< deferred_count
; i
++)
1718 struct deferred_opt
*opt
= &deferred_opts
[i
];
1720 if (opt
->code
== OPT_MT
|| opt
->code
== OPT_MQ
)
1721 cpp_add_dependency_target (parse_in
, opt
->arg
, opt
->code
== OPT_MQ
);
1725 /* These settings are appropriate for GCC, but not necessarily so for
1726 cpplib as a library. */
1728 sanitize_cpp_opts ()
1730 /* If we don't know what style of dependencies to output, complain
1731 if any other dependency switches have been given. */
1732 if (deps_seen
&& cpp_opts
->deps
.style
== DEPS_NONE
)
1733 error ("to generate dependencies you must specify either -M or -MM");
1735 /* -dM and dependencies suppress normal output; do it here so that
1736 the last -d[MDN] switch overrides earlier ones. */
1737 if (flag_dump_macros
== 'M')
1740 /* Disable -dD, -dN and -dI if normal output is suppressed. Allow
1741 -dM since at least glibc relies on -M -dM to work. */
1744 if (flag_dump_macros
!= 'M')
1745 flag_dump_macros
= 0;
1746 flag_dump_includes
= 0;
1749 cpp_opts
->unsigned_char
= !flag_signed_char
;
1750 cpp_opts
->stdc_0_in_system_headers
= STDC_0_IN_SYSTEM_HEADERS
;
1752 /* We want -Wno-long-long to override -pedantic -std=non-c99
1753 and/or -Wtraditional, whatever the ordering. */
1754 cpp_opts
->warn_long_long
1755 = warn_long_long
&& ((!flag_isoc99
&& pedantic
) || warn_traditional
);
1758 /* Add include path with a prefix at the front of its name. */
1760 add_prefixed_path (suffix
, chain
)
1766 size_t prefix_len
, suffix_len
;
1768 suffix_len
= strlen (suffix
);
1769 prefix
= iprefix
? iprefix
: cpp_GCC_INCLUDE_DIR
;
1770 prefix_len
= iprefix
? strlen (iprefix
) : cpp_GCC_INCLUDE_DIR_len
;
1772 path
= xmalloc (prefix_len
+ suffix_len
+ 1);
1773 memcpy (path
, prefix
, prefix_len
);
1774 memcpy (path
+ prefix_len
, suffix
, suffix_len
);
1775 path
[prefix_len
+ suffix_len
] = '\0';
1777 add_path (path
, chain
, 0);
1780 /* Handle -D, -U, -A, -imacros, and the first -include. */
1784 if (!cpp_opts
->preprocessed
)
1788 cpp_change_file (parse_in
, LC_RENAME
, _("<built-in>"));
1789 cpp_init_builtins (parse_in
);
1790 c_cpp_builtins (parse_in
);
1791 cpp_change_file (parse_in
, LC_RENAME
, _("<command line>"));
1792 for (i
= 0; i
< deferred_count
; i
++)
1794 struct deferred_opt
*opt
= &deferred_opts
[i
];
1796 if (opt
->code
== OPT_D
)
1797 cpp_define (parse_in
, opt
->arg
);
1798 else if (opt
->code
== OPT_U
)
1799 cpp_undef (parse_in
, opt
->arg
);
1800 else if (opt
->code
== OPT_A
)
1802 if (opt
->arg
[0] == '-')
1803 cpp_unassert (parse_in
, opt
->arg
+ 1);
1805 cpp_assert (parse_in
, opt
->arg
);
1809 /* Handle -imacros after -D and -U. */
1810 for (i
= 0; i
< deferred_count
; i
++)
1812 struct deferred_opt
*opt
= &deferred_opts
[i
];
1814 if (opt
->code
== OPT_imacros
1815 && cpp_push_include (parse_in
, opt
->arg
))
1816 cpp_scan_nooutput (parse_in
);
1820 push_command_line_include ();
1823 /* Give CPP the next file given by -include, if any. */
1825 push_command_line_include ()
1827 if (cpp_opts
->preprocessed
)
1830 while (include_cursor
< deferred_count
)
1832 struct deferred_opt
*opt
= &deferred_opts
[include_cursor
++];
1834 if (opt
->code
== OPT_include
&& cpp_push_include (parse_in
, opt
->arg
))
1838 if (include_cursor
== deferred_count
)
1840 /* Restore the line map from <command line>. */
1841 cpp_change_file (parse_in
, LC_RENAME
, main_input_filename
);
1842 /* -Wunused-macros should only warn about macros defined hereafter. */
1843 cpp_opts
->warn_unused_macros
= warn_unused_macros
;
1848 /* File change callback. Has to handle -include files. */
1850 cb_file_change (pfile
, new_map
)
1851 cpp_reader
*pfile ATTRIBUTE_UNUSED
;
1852 const struct line_map
*new_map
;
1854 if (flag_preprocess_only
)
1855 pp_file_change (new_map
);
1857 fe_file_change (new_map
);
1859 if (new_map
->reason
== LC_LEAVE
&& MAIN_FILE_P (new_map
))
1860 push_command_line_include ();
1863 /* Set the C 89 standard (with 1994 amendments if C94, without GNU
1864 extensions if ISO). There is no concept of gnu94. */
1866 set_std_c89 (c94
, iso
)
1869 cpp_set_lang (parse_in
, c94
? CLK_STDC94
: iso
? CLK_STDC89
: CLK_GNUC89
);
1872 flag_no_gnu_keywords
= iso
;
1873 flag_no_nonansi_builtin
= iso
;
1874 flag_noniso_default_format_attributes
= !iso
;
1877 flag_writable_strings
= 0;
1880 /* Set the C 99 standard (without GNU extensions if ISO). */
1885 cpp_set_lang (parse_in
, iso
? CLK_STDC99
: CLK_GNUC99
);
1887 flag_no_nonansi_builtin
= iso
;
1888 flag_noniso_default_format_attributes
= !iso
;
1892 flag_writable_strings
= 0;
1895 /* Set the C++ 98 standard (without GNU extensions if ISO). */
1900 cpp_set_lang (parse_in
, iso
? CLK_CXX98
: CLK_GNUCXX
);
1901 flag_no_gnu_keywords
= iso
;
1902 flag_no_nonansi_builtin
= iso
;
1903 flag_noniso_default_format_attributes
= !iso
;
1907 /* Handle setting implicit to ON. */
1913 warn_implicit_int
= on
;
1916 if (mesg_implicit_function_declaration
!= 2)
1917 mesg_implicit_function_declaration
= 1;
1920 mesg_implicit_function_declaration
= 0;
1923 /* Args to -d specify what to dump. Silently ignore
1924 unrecognized options; they may be aimed at toplev.c. */
1931 while ((c
= *arg
++) != '\0')
1934 case 'M': /* Dump macros only. */
1935 case 'N': /* Dump names. */
1936 case 'D': /* Dump definitions. */
1937 flag_dump_macros
= c
;
1941 flag_dump_includes
= 1;
1946 /* Write a slash-separated list of languages in FLAGS to BUF. */
1948 write_langs (buf
, flags
)
1953 if (flags
& CL_C_ONLY
)
1955 if (flags
& CL_OBJC_ONLY
)
1959 strcat (buf
, "ObjC");
1961 if (flags
& CL_CXX_ONLY
)
1965 strcat (buf
, "C++");
1969 /* Complain that switch OPT_INDEX does not apply to this front end. */
1971 complain_wrong_lang (opt_index
)
1974 char ok_langs
[60], bad_langs
[60];
1975 int ok_flags
= cl_options
[opt_index
].flags
;
1977 write_langs (ok_langs
, ok_flags
);
1978 write_langs (bad_langs
, ~ok_flags
);
1979 warning ("\"-%s\" is valid for %s but not for %s",
1980 cl_options
[opt_index
].opt_text
, ok_langs
, bad_langs
);
1983 /* Handle --help output. */
1987 /* To keep the lines from getting too long for some compilers, limit
1988 to about 500 characters (6 lines) per chunk. */
1991 -include <file> Include the contents of <file> before other files\n\
1992 -imacros <file> Accept definition of macros in <file>\n\
1993 -iprefix <path> Specify <path> as a prefix for next two options\n\
1994 -iwithprefix <dir> Add <dir> to the end of the system include path\n\
1995 -iwithprefixbefore <dir> Add <dir> to the end of the main include path\n\
1996 -isystem <dir> Add <dir> to the start of the system include path\n\
1999 -idirafter <dir> Add <dir> to the end of the system include path\n\
2000 -I <dir> Add <dir> to the end of the main include path\n\
2001 -I- Fine-grained include path control; see info docs\n\
2002 -nostdinc Do not search system include directories\n\
2003 (dirs specified with -isystem will still be used)\n\
2004 -nostdinc++ Do not search system include directories for C++\n\
2005 -o <file> Put output into <file>\n\
2008 -trigraphs Support ISO C trigraphs\n\
2009 -std=<std name> Specify the conformance standard; one of:\n\
2010 gnu89, gnu99, c89, c99, iso9899:1990,\n\
2011 iso9899:199409, iso9899:1999, c++98\n\
2012 -w Inhibit warning messages\n\
2013 -W[no-]trigraphs Warn if trigraphs are encountered\n\
2014 -W[no-]comment{s} Warn if one comment starts inside another\n\
2017 -W[no-]traditional Warn about features not present in traditional C\n\
2018 -W[no-]undef Warn if an undefined macro is used by #if\n\
2019 -W[no-]import Warn about the use of the #import directive\n\
2022 -W[no-]error Treat all warnings as errors\n\
2023 -W[no-]system-headers Do not suppress warnings from system headers\n\
2024 -W[no-]all Enable most preprocessor warnings\n\
2027 -M Generate make dependencies\n\
2028 -MM As -M, but ignore system header files\n\
2029 -MD Generate make dependencies and compile\n\
2030 -MMD As -MD, but ignore system header files\n\
2031 -MF <file> Write dependency output to the given file\n\
2032 -MG Treat missing header file as generated files\n\
2035 -MP Generate phony targets for all headers\n\
2036 -MQ <target> Add a MAKE-quoted target\n\
2037 -MT <target> Add an unquoted target\n\
2040 -D<macro> Define a <macro> with string '1' as its value\n\
2041 -D<macro>=<val> Define a <macro> with <val> as its value\n\
2042 -A<question>=<answer> Assert the <answer> to <question>\n\
2043 -A-<question>=<answer> Disable the <answer> to <question>\n\
2044 -U<macro> Undefine <macro> \n\
2045 -v Display the version number\n\
2048 -H Print the name of header files as they are used\n\
2049 -C Do not discard comments\n\
2050 -dM Display a list of macro definitions active at end\n\
2051 -dD Preserve macro definitions in output\n\
2052 -dN As -dD except that only the names are preserved\n\
2053 -dI Include #include directives in the output\n\
2056 -f[no-]preprocessed Treat the input file as already preprocessed\n\
2057 -ftabstop=<number> Distance between tab stops for column reporting\n\
2058 -isysroot <dir> Set <dir> to be the system root directory\n\
2059 -P Do not generate #line directives\n\
2060 -remap Remap file names when including files\n\
2061 --help Display this information\n\