1 /* Specific flags and argument handling of the Fortran front-end.
2 Copyright (C) 1997, 1999, 2000, 2001, 2002, 2003, 2004, 2006
3 Free Software Foundation, Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GCC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
24 /* This file contains a filter for the main `gcc' driver, which is
25 replicated for the `g77' driver by adding this filter. The purpose
26 of this filter is to be basically identical to gcc (in that
27 it faithfully passes all of the original arguments to gcc) but,
28 unless explicitly overridden by the user in certain ways, ensure
29 that the needs of the language supported by this wrapper are met.
31 For GNU Fortran (g77), we do the following to the argument list
32 before passing it to `gcc':
34 1. Make sure `-lg2c -lm' is at the end of the list.
36 2. Make sure each time `-lg2c' or `-lm' is seen, it forms
37 part of the series `-lg2c -lm'.
39 #1 and #2 are not done if `-nostdlib' or any option that disables
40 the linking phase is present, or if `-xfoo' is in effect. Note that
41 a lack of source files or -l options disables linking.
43 This program was originally made out of gcc/cp/g++spec.c, but the
44 way it builds the new argument list was rewritten so it is much
45 easier to maintain, improve the way it decides to add or not add
46 extra arguments, etc. And several improvements were made in the
47 handling of arguments, primarily to make it more consistent with
52 #include "coretypes.h"
58 #define MATH_LIBRARY "-lm"
60 #ifndef MATH_LIBRARY_PROFILE
61 #define MATH_LIBRARY_PROFILE "-lm"
65 #define FORTRAN_INIT "-lfrtbegin"
67 #ifndef FORTRAN_INIT_PROFILE
68 #define FORTRAN_INIT_PROFILE "-lfrtbegin"
71 #ifndef FORTRAN_LIBRARY
72 #define FORTRAN_LIBRARY "-lg2c"
74 #ifndef FORTRAN_LIBRARY_PROFILE
75 #define FORTRAN_LIBRARY_PROFILE "-lg2c"
78 /* Options this driver needs to recognize, not just know how to
82 OPTION_b, /* Aka --prefix. */
83 OPTION_B, /* Aka --target. */
84 OPTION_c, /* Aka --compile. */
85 OPTION_driver, /* Wrapper-specific option. */
86 OPTION_E, /* Aka --preprocess. */
87 OPTION_help, /* --help. */
88 OPTION_i, /* -imacros, -include, -include-*. */
90 OPTION_L, /* Aka --library-directory. */
91 OPTION_M, /* Aka --dependencies. */
92 OPTION_MM, /* Aka --user-dependencies. */
93 OPTION_nostdlib, /* Aka --no-standard-libraries, or
95 OPTION_o, /* Aka --output. */
96 OPTION_p, /* Aka --profile. */
97 OPTION_S, /* Aka --assemble. */
98 OPTION_syntax_only, /* -fsyntax-only. */
99 OPTION_v, /* Aka --verbose. */
100 OPTION_version, /* --version. */
101 OPTION_V, /* Aka --use-version. */
102 OPTION_x, /* Aka --language. */
103 OPTION_ /* Unrecognized or unimportant. */
106 /* The original argument list and related info is copied here. */
107 static int g77_xargc;
108 static const char *const *g77_xargv;
109 static void lookup_option (Option *, int *, const char **, const char *);
110 static void append_arg (const char *);
112 /* The new argument list will be built here. */
113 static int g77_newargc;
114 static const char **g77_newargv;
116 #ifndef SWITCH_TAKES_ARG
117 #define SWITCH_TAKES_ARG(CHAR) DEFAULT_SWITCH_TAKES_ARG(CHAR)
120 #ifndef WORD_SWITCH_TAKES_ARG
121 #define WORD_SWITCH_TAKES_ARG(STR) DEFAULT_WORD_SWITCH_TAKES_ARG (STR)
124 /* Assumes text[0] == '-'. Returns number of argv items that belong to
125 (and follow) this one, an option id for options important to the
126 caller, and a pointer to the first char of the arg, if embedded (else
127 returns NULL, meaning no arg or it's the next argv).
129 Note that this also assumes gcc.c's pass converting long options
130 to short ones, where available, has already been run. */
133 lookup_option (Option *xopt, int *xskip, const char **xarg, const char *text)
135 Option opt = OPTION_;
137 const char *arg = NULL;
139 if ((skip = SWITCH_TAKES_ARG (text[1])))
140 skip -= (text[2] != '\0'); /* See gcc.c. */
143 opt = OPTION_B, skip = (text[2] == '\0'), arg = text + 2;
144 else if (text[1] == 'b')
145 opt = OPTION_b, skip = (text[2] == '\0'), arg = text + 2;
146 else if ((text[1] == 'c') && (text[2] == '\0'))
147 opt = OPTION_c, skip = 0;
148 else if ((text[1] == 'E') && (text[2] == '\0'))
149 opt = OPTION_E, skip = 0;
150 else if (text[1] == 'i')
151 opt = OPTION_i, skip = 0;
152 else if (text[1] == 'l')
154 else if (text[1] == 'L')
155 opt = OPTION_L, arg = text + 2;
156 else if (text[1] == 'o')
158 else if ((text[1] == 'p') && (text[2] == '\0')
159 || (text[1] == 'p') && (text[2] == 'g') && (text[3] == '\0'))
161 else if ((text[1] == 'S') && (text[2] == '\0'))
162 opt = OPTION_S, skip = 0;
163 else if (text[1] == 'V')
164 opt = OPTION_V, skip = (text[2] == '\0');
165 else if ((text[1] == 'v') && (text[2] == '\0'))
166 opt = OPTION_v, skip = 0;
167 else if (text[1] == 'x')
168 opt = OPTION_x, arg = text + 2;
171 if ((skip = WORD_SWITCH_TAKES_ARG (text + 1)) != 0) /* See gcc.c. */
173 else if (! strncmp (text, "-fdriver", 8)) /* Really --driver!! */
174 opt = OPTION_driver; /* Never mind arg, this is unsupported. */
175 else if (! strcmp (text, "-fhelp")) /* Really --help!! */
177 else if (! strcmp (text, "-M"))
179 else if (! strcmp (text, "-MM"))
181 else if (! strcmp (text, "-nostdlib")
182 || ! strcmp (text, "-nodefaultlibs"))
183 opt = OPTION_nostdlib;
184 else if (! strcmp (text, "-fsyntax-only"))
185 opt = OPTION_syntax_only;
186 else if (! strcmp (text, "-dumpversion"))
187 opt = OPTION_version;
188 else if (! strcmp (text, "-fversion")) /* Really --version!! */
189 opt = OPTION_version;
190 else if (! strcmp (text, "-Xlinker")
191 || ! strcmp (text, "-specs"))
211 /* Append another argument to the list being built. As long as it is
212 identical to the corresponding arg in the original list, just increment
213 the new arg count. Otherwise allocate a new list, etc. */
216 append_arg (const char *arg)
218 static int newargsize;
221 fprintf (stderr, "`%s'\n", arg);
224 if (g77_newargv == g77_xargv
225 && g77_newargc < g77_xargc
226 && (arg == g77_xargv[g77_newargc]
227 || ! strcmp (arg, g77_xargv[g77_newargc])))
230 return; /* Nothing new here. */
233 if (g77_newargv == g77_xargv)
234 { /* Make new arglist. */
237 newargsize = (g77_xargc << 2) + 20; /* This should handle all. */
238 g77_newargv = xmalloc (newargsize * sizeof (char *));
240 /* Copy what has been done so far. */
241 for (i = 0; i < g77_newargc; ++i)
242 g77_newargv[i] = g77_xargv[i];
245 if (g77_newargc == newargsize)
246 fatal ("overflowed output arg list for `%s'", arg);
248 g77_newargv[g77_newargc++] = arg;
252 lang_specific_driver (int *in_argc, const char *const **in_argv,
253 int *in_added_libraries ATTRIBUTE_UNUSED)
256 const char *const *argv = *in_argv;
263 /* This will be NULL if we encounter a situation where we should not
265 const char *library = FORTRAN_LIBRARY;
267 /* 0 => -xnone in effect.
268 1 => -xfoo in effect. */
269 int saw_speclang = 0;
271 /* 0 => initial/reset state
272 1 => last arg was -l<library>
273 2 => last two args were -l<library> -lm. */
276 /* 0 => initial/reset state
277 1 => FORTRAN_INIT linked in */
279 /* By default, we throw on the math library if we have one. */
280 int need_math = (MATH_LIBRARY[0] != '\0');
282 /* If non-zero, the user gave us the `-p' or `-pg' flag. */
283 int saw_profile_flag = 0;
285 /* The number of input and output files in the incoming arg list. */
290 fprintf (stderr, "Incoming:");
291 for (i = 0; i < argc; i++)
292 fprintf (stderr, " %s", argv[i]);
293 fprintf (stderr, "\n");
299 g77_newargv = (const char **) argv;
301 /* First pass through arglist.
303 If -nostdlib or a "turn-off-linking" option is anywhere in the
304 command line, don't do any library-option processing (except
305 relating to -x). Also, if -v is specified, but no other options
306 that do anything special (allowing -V version, etc.), remember
307 to add special stuff to make gcc command actually invoke all
308 the different phases of the compilation process so all the version
311 Also, here is where all problems with missing arguments to options
312 are caught. If this loop is exited normally, it means all options
313 have the appropriate number of arguments as far as the rest of this
314 program is concerned. */
316 for (i = 1; i < argc; ++i)
318 if ((argv[i][0] == '+') && (argv[i][1] == 'e'))
323 if ((argv[i][0] != '-') || (argv[i][1] == '\0'))
329 lookup_option (&opt, &skip, NULL, argv[i]);
333 case OPTION_nostdlib:
336 case OPTION_syntax_only:
340 /* These options disable linking entirely or linking of the
341 standard libraries. */
354 saw_profile_flag = 1;
355 library = FORTRAN_LIBRARY_PROFILE;
367 /* These options are useful in conjunction with -v to get
368 appropriate version info. */
372 printf ("GNU Fortran (GCC) %s\n", version_string);
373 printf ("Copyright %s 2006 Free Software Foundation, Inc.\n",
377 GNU Fortran comes with NO WARRANTY, to the extent permitted by law.\n\
378 You may redistribute copies of GNU Fortran\n\
379 under the terms of the GNU General Public License.\n\
380 For more information about these matters, see the file named COPYING\n\
381 or type the command `info -f g77 Copying'.\n\
387 /* Let gcc.c handle this, as it has a really
388 cool facility for handling --help and --verbose --help. */
392 fatal ("--driver no longer supported");
399 /* This is the one place we check for missing arguments in the
405 fatal ("argument to `%s' missing", argv[i]);
408 if ((n_outfiles != 0) && (n_infiles == 0))
409 fatal ("no input files; unwilling to write output files");
411 /* If there are no input files, no need for the library. */
415 /* Second pass through arglist, transforming arguments as appropriate. */
417 append_arg (argv[0]); /* Start with command name, of course. */
419 for (i = 1; i < argc; ++i)
421 if (argv[i][0] == '\0')
423 append_arg (argv[i]); /* Interesting. Just append as is. */
427 if ((argv[i][0] == '-') && (argv[i][1] != 'l'))
429 /* Not a filename or library. */
431 if (saw_library == 1 && need_math) /* -l<library>. */
432 append_arg (saw_profile_flag ? MATH_LIBRARY_PROFILE : MATH_LIBRARY);
436 lookup_option (&opt, &skip, &arg, argv[i]);
438 if (argv[i][1] == '\0')
440 append_arg (argv[i]); /* "-" == Standard input. */
446 /* Track input language. */
454 saw_speclang = (strcmp (lang, "none") != 0);
457 append_arg (argv[i]);
459 for (; skip != 0; --skip)
460 append_arg (argv[++i]);
465 /* A filename/library, not an option. */
468 saw_library = 0; /* -xfoo currently active. */
470 { /* -lfoo or filename. */
471 if (strcmp (argv[i], MATH_LIBRARY) == 0)
473 if (saw_library == 1)
474 saw_library = 2; /* -l<library> -lm. */
479 append_arg (saw_profile_flag ? FORTRAN_INIT_PROFILE
483 append_arg (saw_profile_flag ? FORTRAN_LIBRARY_PROFILE
487 else if (strcmp (argv[i], FORTRAN_LIBRARY) == 0)
488 saw_library = 1; /* -l<library>. */
490 { /* Other library, or filename. */
491 if (saw_library == 1 && need_math)
492 append_arg (saw_profile_flag ? MATH_LIBRARY_PROFILE
497 append_arg (argv[i]);
500 /* Append `-lg2c -lm' as necessary. */
503 { /* Doing a link and no -nostdlib. */
505 append_arg ("-xnone");
512 append_arg (saw_profile_flag ? FORTRAN_INIT_PROFILE
516 append_arg (library);
519 append_arg (saw_profile_flag ? MATH_LIBRARY_PROFILE : MATH_LIBRARY);
525 #ifdef ENABLE_SHARED_LIBGCC
530 for (i = 1; i < g77_newargc; i++)
531 if (g77_newargv[i][0] == '-')
532 if (strcmp (g77_newargv[i], "-static-libgcc") == 0
533 || strcmp (g77_newargv[i], "-static") == 0)
536 if (i == g77_newargc)
537 append_arg ("-shared-libgcc");
543 && g77_newargv != g77_xargv)
545 fprintf (stderr, "Driving:");
546 for (i = 0; i < g77_newargc; i++)
547 fprintf (stderr, " %s", g77_newargv[i]);
548 fprintf (stderr, "\n");
551 *in_argc = g77_newargc;
552 *in_argv = g77_newargv;
555 /* Called before linking. Returns 0 on success and -1 on failure. */
556 int lang_specific_pre_link (void) /* Not used for F77. */
561 /* Number of extra output files that lang_specific_pre_link may generate. */
562 int lang_specific_extra_outfiles = 0; /* Not used for F77. */
564 /* Table of language-specific spec functions. */
565 const struct spec_function lang_specific_spec_functions[] =