174 lines
3.9 KiB
C
174 lines
3.9 KiB
C
/* Copyright (C) 2002-2003, 2005 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 (libgfortran).
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Libgfortran 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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In addition to the permissions in the GNU General Public License, the
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Free Software Foundation gives you unlimited permission to link the
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compiled version of this file into combinations with other programs,
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and to distribute those combinations without any restriction coming
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from the use of this file. (The General Public License restrictions
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do apply in other respects; for example, they cover modification of
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the file, and distribution when not linked into a combine
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executable.)
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Libgfortran 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 libgfortran; see the file COPYING. If not, write to
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the Free Software Foundation, 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#include "config.h"
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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 <limits.h>
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#include "libgfortran.h"
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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/* Stupid function to be sure the constructor is always linked in, even
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in the case of static linking. See PR libfortran/22298 for details. */
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void
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stupid_function_name_for_static_linking (void)
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{
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return;
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}
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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 = 0;
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/* Figure out endianness for this machine. */
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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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static const char *exe_path;
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/* Save the path under which the program was called, for use in the
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backtrace routines. */
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void
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store_exe_path (const char * argv0)
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{
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#ifndef PATH_MAX
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#define PATH_MAX 1024
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#endif
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#ifndef DIR_SEPARATOR
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#define DIR_SEPARATOR '/'
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#endif
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char buf[PATH_MAX], *cwd, *path;
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if (argv0[0] == '/')
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{
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exe_path = argv0;
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return;
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}
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cwd = getcwd (buf, sizeof (buf));
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/* exe_path will be cwd + "/" + argv[0] + "\0" */
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path = malloc (strlen (cwd) + 1 + strlen (argv0) + 1);
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st_sprintf (path, "%s%c%s", cwd, DIR_SEPARATOR, argv0);
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exe_path = path;
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}
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/* Return the full path of the executable. */
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char *
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full_exe_path (void)
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{
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return (char *) exe_path;
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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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set_fpu ();
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init_compile_options ();
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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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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 (void)
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{
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close_units ();
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}
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