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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 by Martin Pool <mbp@samba.org>
*
* 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.
*/
/**
* @file
*
* Run the preprocessor. Client-side only.
**/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include "distcc.h"
#include "trace.h"
#include "exitcode.h"
#include "util.h"
#include "implicit.h"
#include "exec.h"
/**
* If the input filename is a plain source file rather than a
* preprocessed source file, then preprocess it to a temporary file
* and return the name in @p cpp_fname.
*
* The preprocessor may still be running when we return; you have to
* wait for @p cpp_fid to exit before the output is complete. This
* allows us to overlap opening the TCP socket, which probably doesn't
* use many cycles, with running the preprocessor.
**/
int dcc_cpp_maybe(char **argv, char *input_fname, char **cpp_fname,
pid_t *cpp_pid)
{
char **cpp_argv;
int ret;
char *input_exten;
const char *output_exten;
*cpp_pid = 0;
if (dcc_is_preprocessed(input_fname)) {
/* TODO: Perhaps also consider the option that says not to use cpp.
* Would anyone do that? */
rs_trace("input is already preprocessed");
/* already preprocessed, great. */
if (!(*cpp_fname = strdup(input_fname))) {
rs_log_error("couldn't duplicate string");
return EXIT_OUT_OF_MEMORY;
}
return 0;
}
input_exten = dcc_find_extension(input_fname);
output_exten = dcc_preproc_exten(input_exten);
if ((ret = dcc_make_tmpnam("distcc", output_exten, cpp_fname)))
return ret;
/* We strip the -o option and allow cpp to write to stdout, which is
* caught in a file. Sun cc doesn't understand -E -o, and gcc screws up
* -MD -E -o.
*
* There is still a problem here with -MD -E -o, gcc writes dependencies
* to a file determined by the source filename. We could fix it by
* generating a -MF option, but that would break compilation with older
* versions of gcc. This is only a problem for people who have the source
* and objects in different directories, and who don't specify -MF. They
* can fix it by specifying -MF. */
if ((ret = dcc_strip_dasho(argv, &cpp_argv))
|| (ret = dcc_set_action_opt(cpp_argv, "-E")))
return ret;
/* FIXME: cpp_argv is leaked */
return dcc_spawn_child(cpp_argv, cpp_pid,
"/dev/null", *cpp_fname, NULL);
}
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