return ret;
}
-extern int main (int, char **);
+/* The top-level "main" within the driver would be ~1000 lines long.
+ This class breaks it up into smaller functions and contains some
+ state shared by them. */
-int
-main (int argc, char **argv)
+class driver
{
- size_t i;
- int value;
- int linker_was_run = 0;
- int lang_n_infiles = 0;
- int num_linker_inputs = 0;
+ public:
+ int main (int argc, char **argv);
+
+ private:
+ void set_progname (const char *argv0) const;
+ void expand_at_files (int *argc, char ***argv) const;
+ void decode_argv (int argc, const char **argv);
+ void global_initializations () const;
+ void build_multilib_strings () const;
+ void set_up_specs () const;
+ void putenv_COLLECT_GCC (const char *argv0) const;
+ void maybe_putenv_COLLECT_LTO_WRAPPER () const;
+ void handle_unrecognized_options () const;
+ int maybe_print_and_exit () const;
+ bool prepare_infiles ();
+ void do_spec_on_infiles () const;
+ void maybe_run_linker (const char *argv0) const;
+ void final_actions () const;
+ int get_exit_code () const;
+
+ private:
char *explicit_link_files;
- char *specs_file;
- char *lto_wrapper_file;
- const char *p;
- struct user_specs *uptr;
- char **old_argv = argv;
struct cl_decoded_option *decoded_options;
unsigned int decoded_options_count;
+};
+
+/* Implement the top-level "main" within the driver in terms of
+ driver::main. */
+
+extern int main (int, char **);
- p = argv[0] + strlen (argv[0]);
- while (p != argv[0] && !IS_DIR_SEPARATOR (p[-1]))
+int
+main (int argc, char **argv)
+{
+ driver d;
+
+ return d.main (argc, argv);
+}
+
+/* driver::main is implemented as a series of driver:: method calls. */
+
+int
+driver::main (int argc, char **argv)
+{
+ bool early_exit;
+
+ set_progname (argv[0]);
+ expand_at_files (&argc, &argv);
+ decode_argv (argc, const_cast <const char **> (argv));
+ global_initializations ();
+ build_multilib_strings ();
+ set_up_specs ();
+ putenv_COLLECT_GCC (argv[0]);
+ maybe_putenv_COLLECT_LTO_WRAPPER ();
+ handle_unrecognized_options ();
+
+ if (!maybe_print_and_exit ())
+ return 0;
+
+ early_exit = prepare_infiles ();
+ if (early_exit)
+ return get_exit_code ();
+
+ do_spec_on_infiles ();
+ maybe_run_linker (argv[0]);
+ final_actions ();
+ return get_exit_code ();
+}
+
+/* Locate the final component of argv[0] after any leading path, and set
+ the program name accordingly. */
+
+void
+driver::set_progname (const char *argv0) const
+{
+ const char *p = argv0 + strlen (argv0);
+ while (p != argv0 && !IS_DIR_SEPARATOR (p[-1]))
--p;
progname = p;
xmalloc_set_program_name (progname);
+}
- expandargv (&argc, &argv);
+/* Expand any @ files within the command-line args,
+ setting at_file_supplied if any were expanded. */
+
+void
+driver::expand_at_files (int *argc, char ***argv) const
+{
+ char **old_argv = *argv;
+
+ expandargv (argc, argv);
/* Determine if any expansions were made. */
- if (argv != old_argv)
+ if (*argv != old_argv)
at_file_supplied = true;
+}
+/* Decode the command-line arguments from argc/argv into the
+ decoded_options array. */
+
+void
+driver::decode_argv (int argc, const char **argv)
+{
/* Register the language-independent parameters. */
global_init_params ();
finish_params ();
init_options_struct (&global_options, &global_options_set);
- decode_cmdline_options_to_array (argc, CONST_CAST2 (const char **, char **,
- argv),
+ decode_cmdline_options_to_array (argc, argv,
CL_DRIVER,
&decoded_options, &decoded_options_count);
+}
+
+/* Perform various initializations and setup. */
+void
+driver::global_initializations () const
+{
/* Unlock the stdio streams. */
unlock_std_streams ();
alloc_args ();
obstack_init (&obstack);
+}
+
+/* Build multilib_select, et. al from the separate lines that make up each
+ multilib selection. */
- /* Build multilib_select, et. al from the separate lines that make up each
- multilib selection. */
+void
+driver::build_multilib_strings () const
+{
{
+ const char *p;
const char *const *q = multilib_raw;
int need_space;
multilib_reuse = XOBFINISH (&multilib_obstack, const char *);
need_space = FALSE;
- for (i = 0; i < ARRAY_SIZE (multilib_defaults_raw); i++)
+ for (size_t i = 0; i < ARRAY_SIZE (multilib_defaults_raw); i++)
{
if (need_space)
obstack_1grow (&multilib_obstack, ' ');
obstack_1grow (&multilib_obstack, 0);
multilib_defaults = XOBFINISH (&multilib_obstack, const char *);
}
+}
+
+/* Set up the spec-handling machinery. */
+
+void
+driver::set_up_specs () const
+{
+ char *specs_file;
+ size_t i;
#ifdef INIT_ENVIRONMENT
/* Set up any other necessary machine specific environment variables. */
/* Process any user specified specs in the order given on the command
line. */
- for (uptr = user_specs_head; uptr; uptr = uptr->next)
+ for (struct user_specs *uptr = user_specs_head; uptr; uptr = uptr->next)
{
char *filename = find_a_file (&startfile_prefixes, uptr->filename,
R_OK, true);
/* Now that we have the switches and the specs, set
the subdirectory based on the options. */
set_multilib_dir ();
+}
+
+/* Set up to remember the pathname of gcc and any options
+ needed for collect. We use argv[0] instead of progname because
+ we need the complete pathname. */
- /* Set up to remember the pathname of gcc and any options
- needed for collect. We use argv[0] instead of progname because
- we need the complete pathname. */
+void
+driver::putenv_COLLECT_GCC (const char *argv0) const
+{
obstack_init (&collect_obstack);
obstack_grow (&collect_obstack, "COLLECT_GCC=", sizeof ("COLLECT_GCC=") - 1);
- obstack_grow (&collect_obstack, argv[0], strlen (argv[0]) + 1);
+ obstack_grow (&collect_obstack, argv0, strlen (argv0) + 1);
xputenv (XOBFINISH (&collect_obstack, char *));
+}
- /* Set up to remember the pathname of the lto wrapper. */
+/* Set up to remember the pathname of the lto wrapper. */
+
+void
+driver::maybe_putenv_COLLECT_LTO_WRAPPER () const
+{
+ char *lto_wrapper_file;
if (have_c)
lto_wrapper_file = NULL;
xputenv (XOBFINISH (&collect_obstack, char *));
}
- /* Reject switches that no pass was interested in. */
+}
- for (i = 0; (int) i < n_switches; i++)
+/* Reject switches that no pass was interested in. */
+
+void
+driver::handle_unrecognized_options () const
+{
+ for (size_t i = 0; (int) i < n_switches; i++)
if (! switches[i].validated)
error ("unrecognized command line option %<-%s%>", switches[i].part1);
+}
- /* Obey some of the options. */
+/* Handle the various -print-* options, returning 0 if the driver
+ should exit, or nonzero if the driver should continue. */
+int
+driver::maybe_print_and_exit () const
+{
if (print_search_dirs)
{
printf (_("install: %s%s\n"),
return (0);
}
+ return 1;
+}
+
+/* Figure out what to do with each input file.
+ Return true if we need to exit early from "main", false otherwise. */
+
+bool
+driver::prepare_infiles ()
+{
+ size_t i;
+ int lang_n_infiles = 0;
+
if (n_infiles == added_libraries)
fatal_error ("no input files");
if (seen_error ())
- goto out;
+ /* Early exit needed from main. */
+ return true;
/* Make a place to record the compiler output file names
that correspond to the input files. */
if (!combine_inputs && have_c && have_o && lang_n_infiles > 1)
fatal_error ("cannot specify -o with -c, -S or -E with multiple files");
+ /* No early exit needed from main; we can continue. */
+ return false;
+}
+
+/* Run the spec machinery on each input file. */
+
+void
+driver::do_spec_on_infiles () const
+{
+ size_t i;
+
for (i = 0; (int) i < n_infiles; i++)
{
int this_file_error = 0;
}
else
{
+ int value;
+
if (compare_debug)
{
free (debug_check_temp_file[0]);
if (lang_specific_pre_link ())
errorcount++;
}
+}
+
+/* If we have to run the linker, do it now. */
+
+void
+driver::maybe_run_linker (const char *argv0) const
+{
+ size_t i;
+ int linker_was_run = 0;
+ int num_linker_inputs;
/* Determine if there are any linker input files. */
num_linker_inputs = 0;
linker_plugin_file_spec = convert_white_space (temp_spec);
}
#endif
- lto_gcc_spec = argv[0];
+ lto_gcc_spec = argv0;
}
/* Rebuild the COMPILER_PATH and LIBRARY_PATH environment variables
" to the linker.\n\n"));
fflush (stdout);
}
- value = do_spec (link_command_spec);
+ int value = do_spec (link_command_spec);
if (value < 0)
errorcount = 1;
linker_was_run = (tmp != execution_count);
&& !(infiles[i].language && infiles[i].language[0] == '*'))
warning (0, "%s: linker input file unused because linking not done",
outfiles[i]);
+}
+
+/* The end of "main". */
+void
+driver::final_actions () const
+{
/* Delete some or all of the temporary files we made. */
if (seen_error ())
printf (("\nFor bug reporting instructions, please see:\n"));
printf ("%s\n", bug_report_url);
}
+}
- out:
+/* Determine what the exit code of the driver should be. */
+
+int
+driver::get_exit_code () const
+{
return (signal_count != 0 ? 2
: seen_error () ? (pass_exit_codes ? greatest_status : 1)
: 0);
projects / gcc.git / commitdiff