1 /* Copyright (C) 2002-2003, 2005, 2007, 2009 Free Software Foundation, Inc.
2 Contributed by Andy Vaught and Paul Brook <paul@nowt.org>
4 This file is part of the GNU Fortran 95 runtime library (libgfortran).
6 Libgfortran is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3, or (at your option)
11 Libgfortran is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 Under Section 7 of GPL version 3, you are granted additional
17 permissions described in the GCC Runtime Library Exception, version
18 3.1, as published by the Free Software Foundation.
20 You should have received a copy of the GNU General Public License and
21 a copy of the GCC Runtime Library Exception along with this program;
22 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 <http://www.gnu.org/licenses/>. */
25 #include "libgfortran.h"
35 /* Stupid function to be sure the constructor is always linked in, even
36 in the case of static linking. See PR libfortran/22298 for details. */
38 stupid_function_name_for_static_linking (void)
43 /* This will be 0 for little-endian
44 machines and 1 for big-endian machines. */
48 /* Figure out endianness for this machine. */
51 determine_endianness (void)
65 runtime_error ("Unable to determine machine endianness");
70 static char **argv_save;
72 static const char *exe_path;
73 static int please_free_exe_path_when_done;
75 /* Save the path under which the program was called, for use in the
76 backtrace routines. */
78 store_exe_path (const char * argv0)
85 #define DIR_SEPARATOR '/'
88 char buf[PATH_MAX], *cwd, *path;
90 /* This can only happen if store_exe_path is called multiple times. */
91 if (please_free_exe_path_when_done)
92 free ((char *) exe_path);
94 /* On the simulator argv is not set. */
95 if (argv0 == NULL || argv0[0] == '/')
98 please_free_exe_path_when_done = 0;
102 memset (buf, 0, sizeof (buf));
104 cwd = getcwd (buf, sizeof (buf));
109 /* exe_path will be cwd + "/" + argv[0] + "\0" */
110 path = malloc (strlen (cwd) + 1 + strlen (argv0) + 1);
111 sprintf (path, "%s%c%s", cwd, DIR_SEPARATOR, argv0);
113 please_free_exe_path_when_done = 1;
117 /* Return the full path of the executable. */
121 return (char *) exe_path;
125 /* Set the saved values of the command line arguments. */
128 set_args (int argc, char **argv)
132 store_exe_path (argv[0]);
137 /* Retrieve the saved values of the command line arguments. */
140 get_args (int *argc, char ***argv)
147 /* Initialize the runtime library. */
149 static void __attribute__((constructor))
152 /* Figure out the machine endianness. */
153 determine_endianness ();
160 init_compile_options ();
163 /* Check for special command lines. */
165 if (argc > 1 && strcmp (argv[1], "--help") == 0)
168 /* if (argc > 1 && strcmp(argv[1], "--resume") == 0) resume(); */
171 random_seed_i4 (NULL, NULL, NULL);
175 /* Cleanup the runtime library. */
177 static void __attribute__((destructor))
182 if (please_free_exe_path_when_done)
183 free ((char *) exe_path);