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/* -*- c-file-style: "java"; indent-tabs-mode: nil; tab-width: 4; fill-column: 78 -*-
*
* distcc -- A simple distributed compiler system
*
* Copyright (C) 2002, 2003, 2004 by Martin Pool <mbp@samba.org>
* Copyright 2008 Google Inc.
*
* This program 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
* of the License, or (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*/
/* "I do not trouble myself to be understood. I see
* that the elementary laws never apologize."
* -- Whitman, "Song of Myself". */
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include "distcc.h"
#include "trace.h"
#include "exitcode.h"
#include "util.h"
#include "implicit.h"
/**
* @file
*
* Handle invocations where the compiler name is implied rather than
* specified. That is, "distcc -c foo.c".
*
* This method of invocation is less transparent than the masquerade system,
* and less explicit than giving the real compiler name. But it is pretty
* simple, and is retained for that reason.
*
* This is used on the client only. The compiler name is always passed (as
* argv[0]) to the server.
*
* The current implementation determines that no compiler name has been
* specified by checking whether the first argument is either an option, or a
* source or object file name. If not, it is assumed to be the name of the
* compiler to use.
*
* At the moment the default compiler name is always "cc", but this could
* change to come from an environment variable. That's not supported at the
* moment, and may never be. If you need that level of control, using a
* different invocation method is recommended.
**/
/**
* Find the compiler for non-masquerade use.
*
* If we're invoked with no compiler name, insert one.
*
* We can tell there's no compiler name because argv[1] will be either
* a source filename or an object filename or an option. I don't
* think anything else is possible.
*
* Returns a dynamically allocated argv array in *out_argv.
* The caller is responsible for deallocating it.
**/
int dcc_find_compiler(char **argv, char ***out_argv)
{
int ret;
if (argv[1][0] == '-'
|| dcc_is_source(argv[1])
|| dcc_is_object(argv[1])) {
if ((ret = dcc_copy_argv(argv, out_argv, 0)) != 0) {
return ret;
}
/* change "distcc -c foo.c" -> "cc -c foo.c" */
free((*out_argv)[0]);
(*out_argv)[0] = strdup("cc");
if ((*out_argv)[0] == NULL) {
return EXIT_OUT_OF_MEMORY;
}
return 0;
} else {
/* skip "distcc", point to "gcc -c foo.c" */
return dcc_copy_argv(argv + 1, out_argv, 0);
}
}
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