/* C/ObjC/C++ command line option handling.
- Copyright (C) 2002 Free Software Foundation, Inc.
+ Copyright (C) 2002, 2003 Free Software Foundation, Inc.
Contributed by Neil Booth.
This file is part of GCC.
#include "config.h"
#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
#include "tree.h"
#include "c-common.h"
#include "c-pragma.h"
#include "tree-inline.h"
#include "diagnostic.h"
#include "intl.h"
+#include "cppdefault.h"
+#include "c-incpath.h"
+#ifndef TARGET_SYSTEM_ROOT
+# define TARGET_SYSTEM_ROOT NULL
+#endif
+
+/* CPP's options. */
static cpp_options *cpp_opts;
+/* Input filename. */
+static const char *in_fname;
+
+/* Filename and stream for preprocessed output. */
+static const char *out_fname;
+static FILE *out_stream;
+
+/* Append dependencies to deps_file. */
+static bool deps_append;
+
+/* If dependency switches (-MF etc.) have been given. */
+static bool deps_seen;
+
+/* If -v seen. */
+static bool verbose;
+
+/* Dependency output file. */
+static const char *deps_file;
+
+/* The prefix given by -iprefix, if any. */
+static const char *iprefix;
+
+/* The system root, if any. Overridden by -isysroot. */
+static const char *sysroot = TARGET_SYSTEM_ROOT;
+
+/* Zero disables all standard directories for headers. */
+static bool std_inc = true;
+
+/* Zero disables the C++-specific standard directories for headers. */
+static bool std_cxx_inc = true;
+
+/* If the quote chain has been split by -I-. */
+static bool quote_chain_split;
+
+/* Number of deferred options, deferred options array size. */
+static size_t deferred_count, deferred_size;
+
static void missing_arg PARAMS ((size_t));
-static size_t parse_option PARAMS ((const char *, int));
+static size_t find_opt PARAMS ((const char *, int));
static void set_Wimplicit PARAMS ((int));
static void complain_wrong_lang PARAMS ((size_t));
static void write_langs PARAMS ((char *, int));
static void handle_OPT_d PARAMS ((const char *));
static void set_std_cxx98 PARAMS ((int));
static void set_std_c89 PARAMS ((int, int));
+static void set_std_c99 PARAMS ((int));
+static void check_deps_environment_vars PARAMS ((void));
+static void preprocess_file PARAMS ((void));
+static void handle_deferred_opts PARAMS ((void));
+static void sanitize_cpp_opts PARAMS ((void));
+static void add_prefixed_path PARAMS ((const char *, size_t));
+
+#ifndef STDC_0_IN_SYSTEM_HEADERS
+#define STDC_0_IN_SYSTEM_HEADERS 0
+#endif
#define CL_C_ONLY (1 << 0) /* Only C. */
#define CL_OBJC_ONLY (1 << 1) /* Only ObjC. */
#define COMMAND_LINE_OPTIONS \
OPT("-help", CL_ALL, OPT__help) \
+ OPT("-output-pch=", CL_ALL | CL_ARG, OPT__output_pch) \
OPT("C", CL_ALL, OPT_C) \
OPT("CC", CL_ALL, OPT_CC) \
OPT("E", CL_ALL, OPT_E) \
OPT("H", CL_ALL, OPT_H) \
+ OPT("I", CL_ALL | CL_ARG, OPT_I) \
+ OPT("M", CL_ALL, OPT_M) \
+ OPT("MD", CL_ALL | CL_SEPARATE, OPT_MD) \
+ OPT("MF", CL_ALL | CL_ARG, OPT_MF) \
+ OPT("MG", CL_ALL, OPT_MG) \
+ OPT("MM", CL_ALL, OPT_MM) \
+ OPT("MMD", CL_ALL | CL_SEPARATE, OPT_MMD) \
+ OPT("MP", CL_ALL, OPT_MP) \
+ OPT("MQ", CL_ALL | CL_ARG, OPT_MQ) \
+ OPT("MT", CL_ALL | CL_ARG, OPT_MT) \
OPT("P", CL_ALL, OPT_P) \
+ OPT("Wabi", CL_CXX, OPT_Wabi) \
OPT("Wall", CL_ALL, OPT_Wall) \
OPT("Wbad-function-cast", CL_C, OPT_Wbad_function_cast) \
OPT("Wcast-qual", CL_ALL, OPT_Wcast_qual) \
OPT("Wformat-y2k", CL_ALL, OPT_Wformat_y2k) \
OPT("Wformat-zero-length", CL_C, OPT_Wformat_zero_length) \
OPT("Wformat=", CL_ALL | CL_JOINED, OPT_Wformat_eq) \
- OPT("Wimplicit", CL_CXX, OPT_Wimplicit) \
+ OPT("Wimplicit", CL_ALL, OPT_Wimplicit) \
OPT("Wimplicit-function-declaration", CL_C, OPT_Wimplicit_function_decl) \
OPT("Wimplicit-int", CL_C, OPT_Wimplicit_int) \
OPT("Wimport", CL_ALL, OPT_Wimport) \
+ OPT("Winvalid-pch", CL_ALL, OPT_Winvalid_pch) \
OPT("Wlong-long", CL_ALL, OPT_Wlong_long) \
OPT("Wmain", CL_C, OPT_Wmain) \
OPT("Wmissing-braces", CL_ALL, OPT_Wmissing_braces) \
OPT("Wsystem-headers", CL_ALL, OPT_Wsystem_headers) \
OPT("Wtraditional", CL_C, OPT_Wtraditional) \
OPT("Wtrigraphs", CL_ALL, OPT_Wtrigraphs) \
+ OPT("Wundeclared-selector", CL_OBJC, OPT_Wundeclared_selector) \
OPT("Wundef", CL_ALL, OPT_Wundef) \
OPT("Wunknown-pragmas", CL_ALL, OPT_Wunknown_pragmas) \
OPT("Wunused-macros", CL_ALL, OPT_Wunused_macros) \
OPT("Wwrite-strings", CL_ALL, OPT_Wwrite_strings) \
OPT("ansi", CL_ALL, OPT_ansi) \
OPT("d", CL_ALL | CL_JOINED, OPT_d) \
+ OPT("fabi-version=", CL_CXX | CL_JOINED, OPT_fabi_version) \
OPT("faccess-control", CL_CXX, OPT_faccess_control) \
OPT("fall-virtual", CL_CXX, OPT_fall_virtual) \
OPT("falt-external-templates",CL_CXX, OPT_falt_external_templates) \
OPT("fenforce-eh-specs", CL_CXX, OPT_fenforce_eh_specs) \
OPT("fenum-int-equiv", CL_CXX, OPT_fenum_int_equiv) \
OPT("fexternal-templates", CL_CXX, OPT_fexternal_templates) \
+ OPT("ffixed-form", CL_C, OPT_ffixed_form) \
+ OPT("ffixed-line-length-", CL_C | CL_JOINED, OPT_ffixed_line_length) \
OPT("ffor-scope", CL_CXX, OPT_ffor_scope) \
OPT("ffreestanding", CL_C, OPT_ffreestanding) \
OPT("fgnu-keywords", CL_CXX, OPT_fgnu_keywords) \
OPT("fnonnull-objects", CL_CXX, OPT_fnonnull_objects) \
OPT("foperator-names", CL_CXX, OPT_foperator_names) \
OPT("foptional-diags", CL_CXX, OPT_foptional_diags) \
+ OPT("fpch-deps", CL_ALL, OPT_fpch_deps) \
OPT("fpermissive", CL_CXX, OPT_fpermissive) \
OPT("fpreprocessed", CL_ALL, OPT_fpreprocessed) \
OPT("frepo", CL_CXX, OPT_frepo) \
OPT("fweak", CL_CXX, OPT_fweak) \
OPT("fxref", CL_CXX, OPT_fxref) \
OPT("gen-decls", CL_OBJC, OPT_gen_decls) \
+ OPT("idirafter", CL_ALL | CL_ARG, OPT_idirafter) \
+ OPT("iprefix", CL_ALL | CL_ARG, OPT_iprefix) \
+ OPT("isysroot", CL_ALL | CL_ARG, OPT_isysroot) \
+ OPT("isystem", CL_ALL | CL_ARG, OPT_isystem) \
+ OPT("iwithprefix", CL_ALL | CL_ARG, OPT_iwithprefix) \
+ OPT("iwithprefixbefore", CL_ALL | CL_ARG, OPT_iwithprefixbefore) \
OPT("lang-asm", CL_C_ONLY, OPT_lang_asm) \
OPT("lang-objc", CL_ALL, OPT_lang_objc) \
OPT("nostdinc", CL_ALL, OPT_nostdinc) \
OPT("nostdinc++", CL_ALL, OPT_nostdincplusplus) \
+ OPT("o", CL_ALL | CL_ARG, OPT_o) \
OPT("pedantic", CL_ALL, OPT_pedantic) \
OPT("pedantic-errors", CL_ALL, OPT_pedantic_errors) \
OPT("print-objc-runtime-info", CL_OBJC, OPT_print_objc_runtime_info) \
- OPT("std=", CL_ALL | CL_JOINED, OPT_std_bad) \
+ OPT("remap", CL_ALL, OPT_remap) \
OPT("std=c++98", CL_CXX, OPT_std_cplusplus98) \
OPT("std=c89", CL_C, OPT_std_c89) \
OPT("std=c99", CL_C, OPT_std_c99) \
#undef OPT
#undef COMMAND_LINE_OPTIONS
+/* Holds switches parsed by c_common_decode_option (), but whose
+ handling is deferred to c_common_post_options (). */
+static void defer_opt PARAMS ((enum opt_code, const char *));
+static struct deferred_opt
+{
+ enum opt_code code;
+ const char *arg;
+} *deferred_opts;
+
+
#ifdef HOST_EBCDIC
static int opt_comp PARAMS ((const void *, const void *));
missing_arg (opt_index)
size_t opt_index;
{
- switch (opt_index)
+ const char *opt_text = cl_options[opt_index].opt_text;
+
+ switch (cl_options[opt_index].opt_code)
{
+ case OPT__output_pch:
case OPT_Wformat_eq:
case OPT_d:
+ case OPT_fabi_version:
case OPT_fbuiltin_:
case OPT_fdump:
case OPT_fname_mangling:
case OPT_ftabstop:
case OPT_ftemplate_depth:
- case OPT_std_bad:
+ case OPT_iprefix:
+ case OPT_iwithprefix:
+ case OPT_iwithprefixbefore:
default:
- error ("missing argument to \"-%s\"", cl_options[opt_index].opt_text);
+ error ("missing argument to \"-%s\"", opt_text);
break;
case OPT_fconstant_string_class:
- error ("no class name specified with -fconstant-string-class=");
+ error ("no class name specified with \"-%s\"", opt_text);
+ break;
+
+ case OPT_I:
+ case OPT_idirafter:
+ case OPT_isysroot:
+ case OPT_isystem:
+ error ("missing path after \"-%s\"", opt_text);
+ break;
+
+ case OPT_MF:
+ case OPT_MD:
+ case OPT_MMD:
+ case OPT_o:
+ error ("missing filename after \"-%s\"", opt_text);
+ break;
+
+ case OPT_MQ:
+ case OPT_MT:
+ error ("missing target after \"-%s\"", opt_text);
break;
}
}
Complications arise since some options can be suffixed with an
argument, and multiple complete matches can occur, e.g. -pedantic
and -pedantic-errors. Also, some options are only accepted by some
- languages. */
+ languages. If a switch matches for a different language and
+ doesn't match any alternatives for the true front end, the index of
+ the matched switch is returned anyway. The caller should check for
+ this case. */
static size_t
-parse_option (input, lang_flag)
+find_opt (input, lang_flag)
const char *input;
int lang_flag;
{
size_t md, mn, mx;
size_t opt_len;
- size_t wrong_lang = N_OPTS;
+ size_t result = N_OPTS;
int comp;
mn = 0;
md = (mn + mx) / 2;
opt_len = cl_options[md].opt_len;
- comp = memcmp (input, cl_options[md].opt_text, opt_len);
+ comp = strncmp (input, cl_options[md].opt_text, opt_len);
if (comp < 0)
mx = md;
{
/* The switch matches. It it an exact match? */
if (input[opt_len] == '\0')
- {
- exact_match:
- if (cl_options[md].flags & lang_flag)
- return md;
- wrong_lang = md;
- break;
- }
+ return md;
else
{
mn = md + 1;
/* Is this switch valid for this front end? */
if (!(cl_options[md].flags & lang_flag))
{
- /* If subsequently we don't find a good match,
- report this as a bad match. */
- wrong_lang = md;
+ /* If subsequently we don't find a better match,
+ return this and let the caller report it as a bad
+ match. */
+ result = md;
continue;
}
for (md = md + 1; md < (size_t) N_OPTS; md++)
{
opt_len = cl_options[md].opt_len;
- if (memcmp (input, cl_options[md].opt_text, opt_len))
+ if (strncmp (input, cl_options[md].opt_text, opt_len))
break;
if (input[opt_len] == '\0')
- goto exact_match;
+ return md;
if (cl_options[md].flags & lang_flag
&& cl_options[md].flags & CL_JOINED)
mx = md;
}
}
- if (wrong_lang != N_OPTS)
- complain_wrong_lang (wrong_lang);
+ return result;
+}
+
+/* Defer option CODE with argument ARG. */
+static void
+defer_opt (code, arg)
+ enum opt_code code;
+ const char *arg;
+{
+ /* FIXME: this should be in c_common_init_options, which should take
+ argc and argv. */
+ if (!deferred_opts)
+ {
+ extern int save_argc;
+ deferred_size = save_argc;
+ deferred_opts = (struct deferred_opt *)
+ xmalloc (deferred_size * sizeof (struct deferred_opt));
+ }
+
+ if (deferred_count == deferred_size)
+ abort ();
- return N_OPTS;
+ deferred_opts[deferred_count].code = code;
+ deferred_opts[deferred_count].arg = arg;
+ deferred_count++;
}
/* Common initialization before parsing options. */
runtime. */
qsort (cl_options, N_OPTS, sizeof (struct cl_option), opt_comp);
#endif
+#if ENABLE_CHECKING
+ {
+ size_t i;
+
+ for (i = 1; i < N_OPTS; i++)
+ if (strcmp (cl_options[i - 1].opt_text, cl_options[i].opt_text) >= 0)
+ error ("options array incorrectly sorted: %s is before %s",
+ cl_options[i - 1].opt_text, cl_options[i].opt_text);
+ }
+#endif
c_language = lang;
- parse_in = cpp_create_reader (lang == clk_c
- ? CLK_GNUC89 : CLK_GNUCXX);
+ parse_in = cpp_create_reader (lang == clk_c ? CLK_GNUC89 : CLK_GNUCXX);
cpp_opts = cpp_get_options (parse_in);
-
if (flag_objc)
cpp_opts->objc = 1;
warn_pointer_arith = (lang == clk_cplusplus);
if (lang == clk_c)
warn_sign_compare = -1;
-
- /* Mark as "unspecified" (see c_common_post_options). */
- flag_bounds_check = -1;
}
/* Handle one command-line option in (argc, argv).
int argc;
char **argv;
{
+ static const int lang_flags[] = {CL_C_ONLY, CL_C, CL_CXX_ONLY, CL_CXX};
size_t opt_index;
const char *opt, *arg = 0;
char *dup = 0;
const struct cl_option *option;
enum opt_code code;
- result = cpp_handle_option (parse_in, argc, argv);
opt = argv[0];
- /* Until handling CPP stuff, ignore non-switches. */
+ /* Interpret "-" or a non-switch as a file name. */
if (opt[0] != '-' || opt[1] == '\0')
- return result;
-
- switch (c_language)
{
- case clk_c: lang_flag = (flag_objc
- ? CL_C
- : CL_C_ONLY);
- break;
- case clk_cplusplus: lang_flag = (flag_objc
- ? CL_CXX
- : CL_CXX_ONLY);
- break;
- default: abort ();
+ if (!in_fname)
+ in_fname = opt;
+ else if (!out_fname)
+ out_fname = opt;
+ else
+ {
+ error ("too many filenames given. Type %s --help for usage",
+ progname);
+ return argc;
+ }
+
+ return 1;
}
/* Drop the "no-" from negative switches. */
on = false;
}
+ result = cpp_handle_option (parse_in, argc, argv);
+
/* Skip over '-'. */
- opt_index = parse_option (opt + 1, lang_flag);
+ lang_flag = lang_flags[(c_language << 1) + flag_objc];
+ opt_index = find_opt (opt + 1, lang_flag);
if (opt_index == N_OPTS)
goto done;
}
}
+ /* Complain about the wrong language after we've swallowed any
+ necessary extra argument. Eventually make this a hard error
+ after the call to find_opt, and return argc. */
+ if (!(cl_options[opt_index].flags & lang_flag))
+ {
+ complain_wrong_lang (opt_index);
+ goto done;
+ }
+
switch (code = option->opt_code)
{
case N_OPTS: /* Shut GCC up. */
print_help ();
break;
+ case OPT__output_pch:
+ pch_file = arg;
+ break;
+
case OPT_C:
cpp_opts->discard_comments = 0;
break;
cpp_opts->print_include_names = 1;
break;
+ case OPT_I:
+ if (strcmp (arg, "-"))
+ add_path (xstrdup (arg), BRACKET, 0);
+ else
+ {
+ if (quote_chain_split)
+ error ("-I- specified twice");
+ quote_chain_split = true;
+ split_quote_chain ();
+ }
+ break;
+
+ case OPT_M:
+ case OPT_MM:
+ /* When doing dependencies with -M or -MM, suppress normal
+ preprocessed output, but still do -dM etc. as software
+ depends on this. Preprocessed output does occur if -MD, -MMD
+ or environment var dependency generation is used. */
+ cpp_opts->deps.style = (code == OPT_M ? DEPS_SYSTEM: DEPS_USER);
+ cpp_opts->no_output = 1;
+ cpp_opts->inhibit_warnings = 1;
+ break;
+
+ case OPT_MD:
+ case OPT_MMD:
+ cpp_opts->deps.style = (code == OPT_MD ? DEPS_SYSTEM: DEPS_USER);
+ deps_file = arg;
+ break;
+
+ case OPT_MF:
+ deps_seen = true;
+ deps_file = arg;
+ break;
+
+ case OPT_MG:
+ deps_seen = true;
+ cpp_opts->deps.missing_files = true;
+ break;
+
+ case OPT_MP:
+ deps_seen = true;
+ cpp_opts->deps.phony_targets = true;
+ break;
+
+ case OPT_MQ:
+ case OPT_MT:
+ deps_seen = true;
+ defer_opt (code, arg);
+ break;
+
case OPT_P:
cpp_opts->no_line_commands = 1;
break;
+ case OPT_Wabi:
+ warn_abi = on;
+ break;
+
case OPT_Wall:
set_Wunused (on);
set_Wformat (on);
set_Wimplicit (on);
warn_char_subscripts = on;
warn_missing_braces = on;
- warn_multichar = on; /* Was C++ only. */
warn_parentheses = on;
warn_return_type = on;
warn_sequence_point = on; /* Was C only. */
warn_sign_compare = on; /* Was C++ only. */
warn_switch = on;
-
+ warn_strict_aliasing = on;
+
/* Only warn about unknown pragmas that are not in system
headers. */
warn_unknown_pragmas = on;
cpp_opts->warn_trigraphs = on;
cpp_opts->warn_comments = on;
cpp_opts->warn_num_sign_change = on;
+ cpp_opts->warn_multichar = on; /* Was C++ only. */
break;
case OPT_Wbad_function_cast:
case OPT_Wdeprecated:
warn_deprecated = on;
+ cpp_opts->warn_deprecated = on;
break;
case OPT_Wdiv_by_zero:
cpp_opts->warn_import = on;
break;
+ case OPT_Winvalid_pch:
+ cpp_opts->warn_invalid_pch = on;
+ break;
+
case OPT_Wlong_long:
warn_long_long = on;
break;
break;
case OPT_Wmultichar:
- warn_multichar = on;
+ cpp_opts->warn_multichar = on;
break;
case OPT_Wnested_externs:
cpp_opts->warn_trigraphs = on;
break;
+ case OPT_Wundeclared_selector:
+ warn_undeclared_selector = on;
+ break;
+
case OPT_Wundef:
cpp_opts->warn_undef = on;
break;
warning ("switch \"%s\" is no longer supported", argv[0]);
break;
+ case OPT_fabi_version:
+ flag_abi_version = read_integral_parameter (arg, argv[0], 1);
+ break;
+
case OPT_faccess_control:
flag_access_control = on;
break;
flag_external_templates = on;
goto cp_deprecated;
+ case OPT_ffixed_form:
+ case OPT_ffixed_line_length:
+ /* Fortran front end options ignored when preprocessing only. */
+ if (flag_preprocess_only)
+ result = -1;
+ break;
+
case OPT_ffor_scope:
flag_new_for_scope = on;
break;
flag_optional_diags = on;
break;
+ case OPT_fpch_deps:
+ cpp_opts->restore_pch_deps = on;
+ break;
+
case OPT_fpermissive:
flag_permissive = on;
break;
break;
case OPT_ftabstop:
- /* Don't recognise -fno-tabstop=. */
+ /* Don't recognize -fno-tabstop=. */
if (!on)
return 0;
flag_gen_declaration = 1;
break;
+ case OPT_idirafter:
+ add_path (xstrdup (arg), AFTER, 0);
+ break;
+
+ case OPT_iprefix:
+ iprefix = arg;
+ break;
+
+ case OPT_isysroot:
+ sysroot = arg;
+ break;
+
+ case OPT_isystem:
+ add_path (xstrdup (arg), SYSTEM, 0);
+ break;
+
+ case OPT_iwithprefix:
+ add_prefixed_path (arg, SYSTEM);
+ break;
+
+ case OPT_iwithprefixbefore:
+ add_prefixed_path (arg, BRACKET);
+ break;
+
case OPT_lang_asm:
cpp_set_lang (parse_in, CLK_ASM);
break;
break;
case OPT_nostdinc:
- /* No default include directories. You must specify all
- include-file directories with -I. */
- cpp_opts->no_standard_includes = 1;
+ std_inc = false;
break;
case OPT_nostdincplusplus:
- /* No default C++-specific include directories. */
- cpp_opts->no_standard_cplusplus_includes = 1;
+ std_cxx_inc = false;
+ break;
+
+ case OPT_o:
+ if (!out_fname)
+ out_fname = arg;
+ else
+ {
+ error ("output filename specified twice");
+ result = argc;
+ }
break;
/* We need to handle the -pedantic switches here, rather than in
print_struct_values = 1;
break;
- case OPT_std_bad:
- error ("unknown standard \"%s\"", arg);
+ case OPT_remap:
+ cpp_opts->remap = 1;
break;
- /* Language standards. We currently recognize:
- -std=iso9899:1990 same as -ansi
- -std=iso9899:199409 ISO C as modified in amend. 1
- -std=iso9899:1999 ISO C 99
- -std=c89 same as -std=iso9899:1990
- -std=c99 same as -std=iso9899:1999
- -std=gnu89 default, iso9899:1990 + gnu extensions
- -std=gnu99 iso9899:1999 + gnu extensions
- */
-
case OPT_std_cplusplus98:
case OPT_std_gnuplusplus98:
- set_std_cxx98 (code == OPT_std_cplusplus98);
+ set_std_cxx98 (code == OPT_std_cplusplus98 /* ISO */);
break;
- case OPT_std_iso9899_199409:
case OPT_std_c89:
case OPT_std_iso9899_1990:
- set_std_c89 (code == OPT_std_iso9899_199409, true);
+ case OPT_std_iso9899_199409:
+ set_std_c89 (code == OPT_std_iso9899_199409 /* c94 */, true /* ISO */);
break;
case OPT_std_gnu89:
case OPT_std_c9x:
case OPT_std_iso9899_1999:
case OPT_std_iso9899_199x:
- cpp_set_lang (parse_in, CLK_STDC99);
- flag_writable_strings = 0;
- flag_no_asm = 1;
- flag_no_nonansi_builtin = 1;
- flag_noniso_default_format_attributes = 0;
- flag_isoc99 = 1;
- flag_isoc94 = 1;
- flag_iso = 1;
+ set_std_c99 (true /* ISO */);
break;
case OPT_std_gnu99:
case OPT_std_gnu9x:
- cpp_set_lang (parse_in, CLK_GNUC99);
- flag_writable_strings = 0;
- flag_no_asm = 0;
- flag_no_nonansi_builtin = 0;
- flag_noniso_default_format_attributes = 1;
- flag_isoc99 = 1;
- flag_isoc94 = 1;
+ set_std_c99 (false /* ISO */);
break;
case OPT_trigraphs:
break;
case OPT_v:
- cpp_opts->verbose = 1;
+ verbose = true;
break;
}
bool
c_common_post_options ()
{
- cpp_post_options (parse_in);
+ /* Canonicalize the input and output filenames. */
+ if (in_fname == NULL || !strcmp (in_fname, "-"))
+ in_fname = "";
+
+ if (out_fname == NULL || !strcmp (out_fname, "-"))
+ out_fname = "";
+
+ if (cpp_opts->deps.style == DEPS_NONE)
+ check_deps_environment_vars ();
+
+ handle_deferred_opts ();
+
+ sanitize_cpp_opts ();
+
+ register_include_chains (parse_in, sysroot, iprefix,
+ std_inc, std_cxx_inc && c_language == clk_cplusplus,
+ verbose);
flag_inline_trees = 1;
}
}
- /* If still "unspecified", make it match -fbounded-pointers. */
- if (flag_bounds_check == -1)
- flag_bounds_check = flag_bounded_pointers;
-
/* Special format checking options don't work without -Wformat; warn if
they are used. */
if (warn_format_y2k && !warn_format)
return flag_preprocess_only;
}
+/* Preprocess the input file to out_stream. */
+static void
+preprocess_file ()
+{
+ /* Open the output now. We must do so even if no_output is on,
+ because there may be other output than from the actual
+ preprocessing (e.g. from -dM). */
+ if (out_fname[0] == '\0')
+ out_stream = stdout;
+ else
+ out_stream = fopen (out_fname, "w");
+
+ if (out_stream == NULL)
+ fatal_io_error ("opening output file %s", out_fname);
+ else
+ cpp_preprocess_file (parse_in, in_fname, out_stream);
+}
+
+/* Front end initialization common to C, ObjC and C++. */
+const char *
+c_common_init (filename)
+ const char *filename;
+{
+ /* Set up preprocessor arithmetic. Must be done after call to
+ c_common_nodes_and_builtins for type nodes to be good. */
+ cpp_opts->precision = TYPE_PRECISION (intmax_type_node);
+ cpp_opts->char_precision = TYPE_PRECISION (char_type_node);
+ cpp_opts->int_precision = TYPE_PRECISION (integer_type_node);
+ cpp_opts->wchar_precision = TYPE_PRECISION (wchar_type_node);
+ cpp_opts->unsigned_wchar = TREE_UNSIGNED (wchar_type_node);
+
+ /* Register preprocessor built-ins before calls to
+ cpp_main_file. */
+ cpp_get_callbacks (parse_in)->register_builtins = cb_register_builtins;
+
+ /* NULL is passed up to toplev.c and we exit quickly. */
+ if (flag_preprocess_only)
+ {
+ preprocess_file ();
+ return NULL;
+ }
+
+ /* Do this before initializing pragmas, as then cpplib's hash table
+ has been set up. NOTE: we are using our own file name here, not
+ the one supplied. */
+ filename = init_c_lex (in_fname);
+
+ init_pragma ();
+
+ return filename;
+}
+
+/* Common finish hook for the C, ObjC and C++ front ends. */
+void
+c_common_finish ()
+{
+ FILE *deps_stream = NULL;
+
+ if (cpp_opts->deps.style != DEPS_NONE)
+ {
+ /* If -M or -MM was seen without -MF, default output to the
+ output stream. */
+ if (!deps_file)
+ deps_stream = out_stream;
+ else
+ {
+ deps_stream = fopen (deps_file, deps_append ? "a": "w");
+ if (!deps_stream)
+ fatal_io_error ("opening dependency file %s", deps_file);
+ }
+ }
+
+ /* For performance, avoid tearing down cpplib's internal structures
+ with cpp_destroy (). */
+ errorcount += cpp_finish (parse_in, deps_stream);
+
+ if (deps_stream && deps_stream != out_stream
+ && (ferror (deps_stream) || fclose (deps_stream)))
+ fatal_io_error ("closing dependency file %s", deps_file);
+
+ if (out_stream && (ferror (out_stream) || fclose (out_stream)))
+ fatal_io_error ("when writing output to %s", out_fname);
+}
+
+/* Either of two environment variables can specify output of
+ dependencies. Their value is either "OUTPUT_FILE" or "OUTPUT_FILE
+ DEPS_TARGET", where OUTPUT_FILE is the file to write deps info to
+ and DEPS_TARGET is the target to mention in the deps. They also
+ result in dependency information being appended to the output file
+ rather than overwriting it, and like Sun's compiler
+ SUNPRO_DEPENDENCIES suppresses the dependency on the main file. */
+static void
+check_deps_environment_vars ()
+{
+ char *spec;
+
+ GET_ENVIRONMENT (spec, "DEPENDENCIES_OUTPUT");
+ if (spec)
+ cpp_opts->deps.style = DEPS_USER;
+ else
+ {
+ GET_ENVIRONMENT (spec, "SUNPRO_DEPENDENCIES");
+ if (spec)
+ {
+ cpp_opts->deps.style = DEPS_SYSTEM;
+ cpp_opts->deps.ignore_main_file = true;
+ }
+ }
+
+ if (spec)
+ {
+ /* Find the space before the DEPS_TARGET, if there is one. */
+ char *s = strchr (spec, ' ');
+ if (s)
+ {
+ /* Let the caller perform MAKE quoting. */
+ defer_opt (OPT_MT, s + 1);
+ *s = '\0';
+ }
+
+ /* Command line -MF overrides environment variables and default. */
+ if (!deps_file)
+ deps_file = spec;
+
+ deps_append = 1;
+ }
+}
+
+/* Handle deferred command line switches. */
+static void
+handle_deferred_opts ()
+{
+ size_t i;
+
+ for (i = 0; i < deferred_count; i++)
+ {
+ struct deferred_opt *opt = &deferred_opts[i];
+
+ switch (opt->code)
+ {
+ case OPT_MT:
+ case OPT_MQ:
+ cpp_add_dependency_target (parse_in, opt->arg, opt->code == OPT_MQ);
+ break;
+
+ default:
+ abort ();
+ }
+ }
+
+ free (deferred_opts);
+}
+
+/* These settings are appropriate for GCC, but not necessarily so for
+ cpplib as a library. */
+static void
+sanitize_cpp_opts ()
+{
+ /* 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");
+
+ /* -dM and dependencies suppress normal output; do it here so that
+ the last -d[MDN] switch overrides earlier ones. */
+ if (cpp_opts->dump_macros == dump_only)
+ cpp_opts->no_output = 1;
+
+ /* Disable -dD, -dN and -dI if normal output is suppressed. Allow
+ -dM since at least glibc relies on -M -dM to work. */
+ if (cpp_opts->no_output)
+ {
+ if (cpp_opts->dump_macros != dump_only)
+ cpp_opts->dump_macros = dump_none;
+ cpp_opts->dump_includes = 0;
+ }
+
+ 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);
+}
+
+/* Add include path with a prefix at the front of its name. */
+static void
+add_prefixed_path (suffix, chain)
+ const char *suffix;
+ size_t chain;
+{
+ const char *prefix;
+
+ prefix = iprefix ? iprefix: cpp_GCC_INCLUDE_DIR;
+ add_path (concat (prefix, suffix), chain, 0);
+}
+
/* Set the C 89 standard (with 1994 amendments if C94, without GNU
- extensions if ISO). */
+ extensions if ISO). There is no concept of gnu94. */
static void
set_std_c89 (c94, iso)
int c94, iso;
flag_writable_strings = 0;
}
+/* Set the C 99 standard (without GNU extensions if ISO). */
+static void
+set_std_c99 (iso)
+ int iso;
+{
+ cpp_set_lang (parse_in, iso ? CLK_STDC99: CLK_GNUC99);
+ flag_no_asm = iso;
+ flag_no_nonansi_builtin = iso;
+ flag_noniso_default_format_attributes = !iso;
+ flag_iso = iso;
+ flag_isoc99 = 1;
+ flag_isoc94 = 1;
+ flag_writable_strings = 0;
+}
+
/* Set the C++ 98 standard (without GNU extensions if ISO). */
static void
set_std_cxx98 (iso)
}
/* Args to -d specify what to dump. Silently ignore
- unrecognised options; they may be aimed at toplev.c. */
+ unrecognized options; they may be aimed at toplev.c. */
static void
handle_OPT_d (arg)
const char *arg;
fputs (_("\
-f[no-]preprocessed Treat the input file as already preprocessed\n\
-ftabstop=<number> Distance between tab stops for column reporting\n\
+ -isysroot <dir> Set <dir> to be the system root directory\n\
-P Do not generate #line directives\n\
-remap Remap file names when including files\n\
--help Display this information\n\
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