120 lines
2.9 KiB
C
120 lines
2.9 KiB
C
/* Copyright (C) 2002-2003, 2005 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 2, or (at your option)
|
|
any later version.
|
|
|
|
In addition to the permissions in the GNU General Public License, the
|
|
Free Software Foundation gives you unlimited permission to link the
|
|
compiled version of this file into combinations with other programs,
|
|
and to distribute those combinations without any restriction coming
|
|
from the use of this file. (The General Public License restrictions
|
|
do apply in other respects; for example, they cover modification of
|
|
the file, and distribution when not linked into a combine
|
|
executable.)
|
|
|
|
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.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with libgfortran; see the file COPYING. If not, write to
|
|
the Free Software Foundation, 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <math.h>
|
|
#include <stddef.h>
|
|
|
|
#include "libgfortran.h"
|
|
|
|
/* This is the offset (in bytes) required to cast from logical(8)* to
|
|
logical(4)*. and still get the same result. Will be 0 for little-endian
|
|
machines and 4 for big-endian machines. */
|
|
int l8_to_l4_offset = 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])
|
|
l8_to_l4_offset = 0;
|
|
else if (u.l4[1])
|
|
l8_to_l4_offset = 1;
|
|
else
|
|
runtime_error ("Unable to determine machine endianness");
|
|
}
|
|
|
|
|
|
static int argc_save;
|
|
static char **argv_save;
|
|
|
|
/* Set the saved values of the command line arguments. */
|
|
|
|
void
|
|
set_args (int argc, char **argv)
|
|
{
|
|
argc_save = argc;
|
|
argv_save = argv;
|
|
}
|
|
|
|
/* 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 ();
|
|
|
|
#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(NULL,NULL,NULL);
|
|
}
|
|
|
|
|
|
/* Cleanup the runtime library. */
|
|
|
|
static void __attribute__((destructor))
|
|
cleanup (void)
|
|
{
|
|
close_units ();
|
|
}
|