| /* Copyright (C) 2002-2003, 2005, 2007 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, 51 Franklin Street, Fifth Floor, |
| Boston, MA 02110-1301, USA. */ |
| |
| #include "libgfortran.h" |
| #include <stdlib.h> |
| #include <string.h> |
| #include <limits.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 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; |
| } |
| |
| |
| static const char *exe_path; |
| static int please_free_exe_path_when_done; |
| |
| /* Save the path under which the program was called, for use in the |
| backtrace routines. */ |
| void |
| store_exe_path (const char * argv0) |
| { |
| #ifndef PATH_MAX |
| #define PATH_MAX 1024 |
| #endif |
| |
| #ifndef DIR_SEPARATOR |
| #define DIR_SEPARATOR '/' |
| #endif |
| |
| char buf[PATH_MAX], *cwd, *path; |
| |
| if (argv0[0] == '/') |
| { |
| exe_path = argv0; |
| please_free_exe_path_when_done = 0; |
| return; |
| } |
| |
| memset (buf, 0, sizeof (buf)); |
| #ifdef HAVE_GETCWD |
| cwd = getcwd (buf, sizeof (buf)); |
| #else |
| cwd = ""; |
| #endif |
| |
| /* exe_path will be cwd + "/" + argv[0] + "\0" */ |
| path = malloc (strlen (cwd) + 1 + strlen (argv0) + 1); |
| sprintf (path, "%s%c%s", cwd, DIR_SEPARATOR, argv0); |
| exe_path = path; |
| please_free_exe_path_when_done = 1; |
| } |
| |
| /* Return the full path of the executable. */ |
| char * |
| full_exe_path (void) |
| { |
| return (char *) exe_path; |
| } |
| |
| /* Initialize the runtime library. */ |
| |
| static void __attribute__((constructor)) |
| init (void) |
| { |
| /* Figure out the machine endianness. */ |
| determine_endianness (); |
| |
| /* Must be first */ |
| init_variables (); |
| |
| init_units (); |
| set_fpu (); |
| init_compile_options (); |
| |
| #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_i4 (NULL, NULL, NULL); |
| } |
| |
| |
| /* Cleanup the runtime library. */ |
| |
| static void __attribute__((destructor)) |
| cleanup (void) |
| { |
| close_units (); |
| |
| if (please_free_exe_path_when_done) |
| free ((char *) exe_path); |
| } |