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/* rustspec.c -- Specific flags and argument handling of the gcc Rust front end.
Copyright (C) 2009-2023 Free Software Foundation, Inc.
This file is part of GCC.
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 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "opts.h"
// satisfy intellisense
#include "options.h"
/* This bit is set if we saw a `-xfoo' language specification. */
#define LANGSPEC (1 << 1)
/* This bit is set if they did `-lc'. */
#define WITHLIBC (1 << 2)
/* Skip this option. */
#define SKIPOPT (1 << 3)
void
lang_specific_driver (struct cl_decoded_option **in_decoded_options,
unsigned int *in_decoded_options_count,
int *in_added_libraries)
{
unsigned int i, j;
/* The new argument list will be contained in this. */
struct cl_decoded_option *new_decoded_options;
/* "-lc" if it appears on the command line. */
const struct cl_decoded_option *saw_libc = 0;
/* An array used to flag each argument that needs a bit set for
LANGSPEC or WITHLIBC. */
int *args;
/* True if we saw -static. */
int static_link = 0;
/* True if we should add -shared-libgcc to the command-line. */
int shared_libgcc = 1;
/* The total number of arguments with the new stuff. */
unsigned int argc;
/* The argument list. */
struct cl_decoded_option *decoded_options;
/* The number of libraries added in. */
int added_libraries;
/* The total number of arguments with the new stuff. */
int num_args = 1;
/* Whether the -o option was used. */
bool saw_opt_o = false;
/* The first input file with an extension of .rs. */
const char *first_rust_file = NULL;
argc = *in_decoded_options_count;
decoded_options = *in_decoded_options;
added_libraries = *in_added_libraries;
args = XCNEWVEC (int, argc);
for (i = 1; i < argc; i++)
{
const char *arg = decoded_options[i].arg;
switch (decoded_options[i].opt_index)
{
case OPT_l:
if (strcmp (arg, "c") == 0)
args[i] |= WITHLIBC;
break;
case OPT_o:
saw_opt_o = true;
break;
case OPT_static:
static_link = 1;
break;
case OPT_static_libgcc:
shared_libgcc = 0;
break;
case OPT_SPECIAL_input_file:
if (first_rust_file == NULL)
{
int len;
len = strlen (arg);
if (len > 3 && strcmp (arg + len - 3, ".rs") == 0)
first_rust_file = arg;
}
else
{
// FIXME: ARTHUR: Do we want to error here? If there's already one
// file?
// How do we error here? Do we want to instead just handle that in
// the session manager?
}
break;
}
}
/* There's no point adding -shared-libgcc if we don't have a shared
libgcc. */
#ifndef ENABLE_SHARED_LIBGCC
shared_libgcc = 0;
#endif
/* Make sure to have room for the trailing NULL argument. */
num_args = argc + shared_libgcc * 5 + 10;
new_decoded_options = XNEWVEC (struct cl_decoded_option, num_args);
i = 0;
j = 0;
/* Copy the 0th argument, i.e., the name of the program itself. */
new_decoded_options[j++] = decoded_options[i++];
/* NOTE: We start at 1 now, not 0. */
while (i < argc)
{
new_decoded_options[j] = decoded_options[i];
if (!saw_libc && (args[i] & WITHLIBC))
{
--j;
saw_libc = &decoded_options[i];
}
if ((args[i] & SKIPOPT) != 0)
--j;
i++;
j++;
}
/* If we didn't see a -o option, add one. This is because we need
the driver to pass all .rs files to rust1. Without a -o option the
driver will invoke rust1 separately for each input file. FIXME:
This should probably use some other interface to force the driver
to set combine_inputs. */
if (!saw_opt_o)
{
generate_option (OPT_o, "a.out", 1, CL_DRIVER, &new_decoded_options[j]);
j++;
}
if (saw_libc)
new_decoded_options[j++] = *saw_libc;
if (shared_libgcc && !static_link)
generate_option (OPT_shared_libgcc, NULL, 1, CL_DRIVER,
&new_decoded_options[j++]);
*in_decoded_options_count = j;
*in_decoded_options = new_decoded_options;
*in_added_libraries = added_libraries;
}
/* Called before linking. Returns 0 on success and -1 on failure. */
int
lang_specific_pre_link (void) /* Not used for Rust. */
{
return 0;
}
/* Number of extra output files that lang_specific_pre_link may generate. */
int lang_specific_extra_outfiles = 0; /* Not used for Rust. */
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