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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>
* 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.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <sys/stat.h>
#include "distcc.h"
#include "trace.h"
#include "util.h"
#include "exitcode.h"
/**
* Strip arguments like -D and -I from a command line, because they do
* not need to be passed across the wire. This covers options for
* both the preprocess and link phases, since they should never happen
* remotely.
*
* In the case where we inadvertently do cause preprocessing to happen
* remotely, it is possible that omitting these options will make
* failure more obvious and avoid false success.
*
* Giving -L on a compile-only command line is a bit weird, but it is
* observed to happen in Makefiles that are not strict about CFLAGS vs
* LDFLAGS, etc.
*
* NOTE: gcc-3.2's manual in the "preprocessor options" section
* describes some options, such as -d, that only take effect when
* passed directly to cpp. When given to gcc they have different
* meanings.
*
* The value stored in '*out_argv' is malloc'd, but the arguments that
* are pointed to by that array are aliased with the values pointed
* to by 'from'. The caller is responsible for calling free() on
* '*out_argv'.
**/
int dcc_strip_local_args(char **from, char ***out_argv)
{
char **to;
int from_i, to_i;
int from_len;
from_len = dcc_argv_len(from);
*out_argv = to = malloc((from_len + 1) * sizeof (char *));
if (!to) {
rs_log_error("failed to allocate space for arguments");
return EXIT_OUT_OF_MEMORY;
}
/* skip through argv, copying all arguments but skipping ones that
* ought to be omitted */
for (from_i = to_i = 0; from[from_i]; from_i++) {
if (str_equal("-D", from[from_i])
|| str_equal("-I", from[from_i])
|| str_equal("-U", from[from_i])
|| str_equal("-L", from[from_i])
|| str_equal("-l", from[from_i])
|| str_equal("-MF", from[from_i])
|| str_equal("-MT", from[from_i])
|| str_equal("-MQ", from[from_i])
|| str_equal("-include", from[from_i])
|| str_equal("-imacros", from[from_i])
|| str_equal("-iprefix", from[from_i])
|| str_equal("-iwithprefix", from[from_i])
|| str_equal("-isystem", from[from_i])
|| str_equal("-iwithprefixbefore", from[from_i])
|| str_equal("-idirafter", from[from_i])
|| str_equal("-Xpreprocessor", from[from_i])) {
/* skip next word, being option argument */
if (from[from_i+1])
from_i++;
}
else if (str_startswith("-Wp,", from[from_i])
|| str_startswith("-Wl,", from[from_i])
|| str_startswith("-D", from[from_i])
|| str_startswith("-U", from[from_i])
|| str_startswith("-I", from[from_i])
|| str_startswith("-l", from[from_i])
|| str_startswith("-L", from[from_i])
|| str_startswith("-MF", from[from_i])
|| str_startswith("-MT", from[from_i])
|| str_startswith("-MQ", from[from_i])
|| str_startswith("-isystem", from[from_i])
|| str_startswith("-stdlib", from[from_i])) {
/* Something like "-DNDEBUG" or
* "-Wp,-MD,.deps/nsinstall.pp". Just skip this word */
;
}
else if (str_equal("-undef", from[from_i])
|| str_equal("-nostdinc", from[from_i])
|| str_equal("-nostdinc++", from[from_i])
|| str_equal("-MD", from[from_i])
|| str_equal("-MMD", from[from_i])
|| str_equal("-MG", from[from_i])
|| str_equal("-MP", from[from_i])) {
/* Options that only affect cpp; skip */
;
}
else {
to[to_i++] = from[from_i];
}
}
/* NULL-terminate */
to[to_i] = NULL;
dcc_trace_argv("result", to);
return 0;
}
/**
* Remove "-o" options from argument list.
*
* This is used when running the preprocessor, when we just want it to write
* to stdout, which is the default when no -o option is specified.
*
* Structurally similar to dcc_strip_local_args()
**/
int dcc_strip_dasho(char **from, char ***out_argv)
{
char **to;
int from_i, to_i;
int from_len;
from_len = dcc_argv_len(from);
*out_argv = to = malloc((from_len + 1) * sizeof (char *));
if (!to) {
rs_log_error("failed to allocate space for arguments");
return EXIT_OUT_OF_MEMORY;
}
/* skip through argv, copying all arguments but skipping ones that
* ought to be omitted */
for (from_i = to_i = 0; from[from_i]; ) {
if (!strcmp(from[from_i], "-o")) {
/* skip "-o FILE" */
from_i += 2;
}
else if (str_startswith("-o", from[from_i])) {
/* skip "-oFILE" */
from_i++;
}
else {
to[to_i++] = from[from_i++];
}
}
/* NULL-terminate */
to[to_i] = NULL;
dcc_trace_argv("result", to);
return 0;
}
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