abdef81151
PR fortran/15149
* gfortran.fortran-torture/execute/random_init.f90: New test.
* libgfortan.h,intrinsics/random.c: Made random_seed visible.
* runtime/main.c(init): Call random_seed as part of MAIN init.
From-SVN: r81836
116 lines
2.5 KiB
C
116 lines
2.5 KiB
C
/* Copyright (C) 2002-2003 Free Software Foundation, Inc.
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Contributed by Andy Vaught and Paul Brook <paul@nowt.org>
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This file is part of the GNU Fortran 95 runtime library (libgfor).
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Libgfor is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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Libgfor is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with libgfor; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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#include <stddef.h>
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#include "libgfortran.h"
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/* This is the offset (in bytes) required to cast from logical(8)* to
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logical(4)*. and still get the same result. Will be 0 for little-endian
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machines and 4 for big-endian machines. */
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int l8_to_l4_offset;
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/* Figure out endianness for this machine. */
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#define detetmine_endianness prefix(determine_endianness)
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static void
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determine_endianness (void)
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{
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union
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{
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GFC_LOGICAL_8 l8;
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GFC_LOGICAL_4 l4[2];
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} u;
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u.l8 = 1;
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if (u.l4[0])
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l8_to_l4_offset = 0;
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else if (u.l4[1])
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l8_to_l4_offset = 1;
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else
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runtime_error ("Unable to determine machine endianness");
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}
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static int argc_save;
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static char **argv_save;
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/* Set the saved values of the command line arguments. */
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void
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set_args (int argc, char **argv)
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{
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argc_save = argc;
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argv_save = argv;
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}
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/* Retrieve the saved values of the command line arguments. */
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void
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get_args (int *argc, char ***argv)
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{
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*argc = argc_save;
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*argv = argv_save;
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}
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/* Initialize the runtime library. */
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static void __attribute__((constructor))
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init (void)
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{
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/* Figure out the machine endianness. */
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determine_endianness ();
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/* Must be first */
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init_variables ();
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init_units ();
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#ifdef DEBUG
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/* Check for special command lines. */
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if (argc > 1 && strcmp (argv[1], "--help") == 0)
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show_variables ();
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/* if (argc > 1 && strcmp(argv[1], "--resume") == 0) resume(); */
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#endif
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memory_init ();
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random_seed(NULL,NULL,NULL);
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}
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/* Cleanup the runtime library. */
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static void __attribute__((destructor))
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cleanup ()
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{
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close_units ();
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}
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