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/* Copyright (C) 2002-2015 Free Software Foundation, Inc.
Contributed by Andy Vaught and Paul Brook <paul@nowt.org>
This file is part of the GNU Fortran 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>
#include <errno.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;
void
store_exe_path (const char * argv0 __attribute__ ((unused)))
{
/* This function is now useless, but is retained due to ABI compatibility.
Remove when bumping the library ABI. */
;
}
/* Set the saved values of the command line arguments. */
void
set_args (int argc, char **argv)
{
argc_save = argc;
argv_save = argv;
}
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 ();
/* If (and only if) the user asked for it, set up the FPU state. */
if (options.fpe != 0)
set_fpu ();
init_compile_options ();
random_seed_i4 (NULL, NULL, NULL);
}
/* Cleanup the runtime library. */
static void __attribute__((destructor))
cleanup (void)
{
close_units ();
}
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