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/* Copyright (C) 2002-2003, 2005, 2007, 2009 Free Software Foundation, Inc.
Contributed by Andy Vaught and Paul Brook <paul@nowt.org>
This file is part of the GNU Fortran 95 runtime library (libgfortran).
Libgfortran 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.
Libgfortran 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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#include "libgfortran.h"
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
/* Stupid function to be sure the constructor is always linked in, even
in the case of static linking. See PR libfortran/22298 for details. */
void
stupid_function_name_for_static_linking (void)
{
return;
}
/* This will be 0 for little-endian
machines and 1 for big-endian machines. */
int big_endian = 0;
/* Figure out endianness for this machine. */
static void
determine_endianness (void)
{
union
{
GFC_LOGICAL_8 l8;
GFC_LOGICAL_4 l4[2];
} u;
u.l8 = 1;
if (u.l4[0])
big_endian = 0;
else if (u.l4[1])
big_endian = 1;
else
runtime_error ("Unable to determine machine endianness");
}
static int argc_save;
static char **argv_save;
static const char *exe_path;
static int please_free_exe_path_when_done;
/* Save the path under which the program was called, for use in the
backtrace routines. */
void
store_exe_path (const char * argv0)
{
#ifndef PATH_MAX
#define PATH_MAX 1024
#endif
#ifndef DIR_SEPARATOR
#define DIR_SEPARATOR '/'
#endif
char buf[PATH_MAX], *cwd, *path;
/* This can only happen if store_exe_path is called multiple times. */
if (please_free_exe_path_when_done)
free ((char *) exe_path);
/* On the simulator argv is not set. */
if (argv0 == NULL || argv0[0] == '/')
{
exe_path = argv0;
please_free_exe_path_when_done = 0;
return;
}
memset (buf, 0, sizeof (buf));
#ifdef HAVE_GETCWD
cwd = getcwd (buf, sizeof (buf));
#else
cwd = "";
#endif
/* exe_path will be cwd + "/" + argv[0] + "\0" */
path = malloc (strlen (cwd) + 1 + strlen (argv0) + 1);
sprintf (path, "%s%c%s", cwd, DIR_SEPARATOR, argv0);
exe_path = path;
please_free_exe_path_when_done = 1;
}
/* Return the full path of the executable. */
char *
full_exe_path (void)
{
return (char *) exe_path;
}
/* Set the saved values of the command line arguments. */
void
set_args (int argc, char **argv)
{
argc_save = argc;
argv_save = argv;
store_exe_path (argv[0]);
}
iexport(set_args);
/* Retrieve the saved values of the command line arguments. */
void
get_args (int *argc, char ***argv)
{
*argc = argc_save;
*argv = argv_save;
}
/* Initialize the runtime library. */
static void __attribute__((constructor))
init (void)
{
/* Figure out the machine endianness. */
determine_endianness ();
/* Must be first */
init_variables ();
init_units ();
set_fpu ();
init_compile_options ();
#ifdef DEBUG
/* Check for special command lines. */
if (argc > 1 && strcmp (argv[1], "--help") == 0)
show_variables ();
/* if (argc > 1 && strcmp(argv[1], "--resume") == 0) resume(); */
#endif
random_seed_i4 (NULL, NULL, NULL);
}
/* Cleanup the runtime library. */
static void __attribute__((destructor))
cleanup (void)
{
close_units ();
if (please_free_exe_path_when_done)
free ((char *) exe_path);
}
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