1 /* Argument parsing and main program of GNU Make.
2 Copyright (C) 1988, 89, 90, 91, 94, 1995 Free Software Foundation, Inc.
3 This file is part of GNU Make.
5 GNU Make is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2, or (at your option)
10 GNU Make is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNU Make; see the file COPYING. If not, write to
17 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
28 extern void print_variable_data_base ();
29 extern void print_dir_data_base ();
30 extern void print_rule_data_base ();
31 extern void print_file_data_base ();
32 extern void print_vpath_data_base ();
38 #ifndef sun /* Sun has an incorrect decl in a header. */
41 extern double atof ();
43 extern char *mktemp ();
45 static void log_working_directory ();
46 static void print_data_base (), print_version ();
47 static void decode_switches (), decode_env_switches ();
48 static void define_makeflags ();
49 static char *quote_as_word ();
51 /* The structure that describes an accepted command switch. */
55 char c
; /* The switch character. */
57 enum /* Type of the value. */
59 flag
, /* Turn int flag on. */
60 flag_off
, /* Turn int flag off. */
61 string
, /* One string per switch. */
62 positive_int
, /* A positive integer. */
63 floating
, /* A floating-point number (double). */
67 char *value_ptr
; /* Pointer to the value-holding variable. */
69 unsigned int env
:1; /* Can come from MAKEFLAGS. */
70 unsigned int toenv
:1; /* Should be put in MAKEFLAGS. */
71 unsigned int no_makefile
:1; /* Don't propagate when remaking makefiles. */
73 char *noarg_value
; /* Pointer to value used if no argument is given. */
74 char *default_value
;/* Pointer to default value. */
76 char *long_name
; /* Long option name. */
77 char *argdesc
; /* Descriptive word for argument. */
78 char *description
; /* Description for usage message. */
82 /* The structure used to hold the list of strings given
83 in command switches of a type that takes string arguments. */
87 char **list
; /* Nil-terminated list of strings. */
88 unsigned int idx
; /* Index into above. */
89 unsigned int max
; /* Number of pointers allocated. */
93 /* The recognized command switches. */
95 /* Nonzero means do not print commands to be executed (-s). */
99 /* Nonzero means just touch the files
100 that would appear to need remaking (-t) */
104 /* Nonzero means just print what commands would need to be executed,
105 don't actually execute them (-n). */
109 /* Print debugging trace info (-d). */
113 /* Environment variables override makefile definitions. */
115 int env_overrides
= 0;
117 /* Nonzero means ignore status codes returned by commands
118 executed to remake files. Just treat them all as successful (-i). */
120 int ignore_errors_flag
= 0;
122 /* Nonzero means don't remake anything, just print the data base
123 that results from reading the makefile (-p). */
125 int print_data_base_flag
= 0;
127 /* Nonzero means don't remake anything; just return a nonzero status
128 if the specified targets are not up to date (-q). */
130 int question_flag
= 0;
132 /* Nonzero means do not use any of the builtin rules (-r). */
134 int no_builtin_rules_flag
= 0;
136 /* Nonzero means keep going even if remaking some file fails (-k). */
139 int default_keep_going_flag
= 0;
141 /* Nonzero means print directory before starting and when done (-w). */
143 int print_directory_flag
= 0;
145 /* Nonzero means ignore print_directory_flag and never print the directory.
146 This is necessary because print_directory_flag is set implicitly. */
148 int inhibit_print_directory_flag
= 0;
150 /* Nonzero means print version information. */
152 int print_version_flag
= 0;
154 /* List of makefiles given with -f switches. */
156 static struct stringlist
*makefiles
= 0;
159 /* Number of job slots (commands that can be run at once). */
161 unsigned int job_slots
= 1;
162 unsigned int default_job_slots
= 1;
164 /* Value of job_slots that means no limit. */
166 static unsigned int inf_jobs
= 0;
168 /* Maximum load average at which multiple jobs will be run.
169 Negative values mean unlimited, while zero means limit to
170 zero load (which could be useful to start infinite jobs remotely
171 but one at a time locally). */
173 double max_load_average
= -1.0;
174 double default_load_average
= -1.0;
176 /* List of directories given with -C switches. */
178 static struct stringlist
*directories
= 0;
180 /* List of include directories given with -I switches. */
182 static struct stringlist
*include_directories
= 0;
184 /* List of files given with -o switches. */
186 static struct stringlist
*old_files
= 0;
188 /* List of files given with -W switches. */
190 static struct stringlist
*new_files
= 0;
192 /* If nonzero, we should just print usage and exit. */
194 static int print_usage_flag
= 0;
196 /* If nonzero, we should print a warning message
197 for each reference to an undefined variable. */
199 int warn_undefined_variables_flag
;
201 /* The table of command switches. */
203 static const struct command_switch switches
[] =
205 { 'b', ignore
, 0, 0, 0, 0, 0, 0,
207 "Ignored for compatibility" },
208 { 'C', string
, (char *) &directories
, 0, 0, 0, 0, 0,
209 "directory", "DIRECTORY",
210 "Change to DIRECTORY before doing anything" },
211 { 'd', flag
, (char *) &debug_flag
, 1, 1, 0, 0, 0,
213 "Print lots of debugging information" },
214 { 'e', flag
, (char *) &env_overrides
, 1, 1, 0, 0, 0,
215 "environment-overrides", 0,
216 "Environment variables override makefiles" },
217 { 'f', string
, (char *) &makefiles
, 0, 0, 0, 0, 0,
219 "Read FILE as a makefile" },
220 { 'h', flag
, (char *) &print_usage_flag
, 0, 0, 0, 0, 0,
222 "Print this message and exit" },
223 { 'i', flag
, (char *) &ignore_errors_flag
, 1, 1, 0, 0, 0,
225 "Ignore errors from commands" },
226 { 'I', string
, (char *) &include_directories
, 1, 1, 0, 0, 0,
227 "include-dir", "DIRECTORY",
228 "Search DIRECTORY for included makefiles" },
229 { 'j', positive_int
, (char *) &job_slots
, 1, 1, 0,
230 (char *) &inf_jobs
, (char *) &default_job_slots
,
232 "Allow N jobs at once; infinite jobs with no arg" },
233 { 'k', flag
, (char *) &keep_going_flag
, 1, 1, 0,
234 0, (char *) &default_keep_going_flag
,
236 "Keep going when some targets can't be made" },
237 { 'l', floating
, (char *) &max_load_average
, 1, 1, 0,
238 (char *) &default_load_average
, (char *) &default_load_average
,
240 "Don't start multiple jobs unless load is below N" },
241 { 'm', ignore
, 0, 0, 0, 0, 0, 0,
244 { 'n', flag
, (char *) &just_print_flag
, 1, 1, 1, 0, 0,
246 "Don't actually run any commands; just print them" },
247 { 'o', string
, (char *) &old_files
, 0, 0, 0, 0, 0,
249 "Consider FILE to be very old and don't remake it" },
250 { 'p', flag
, (char *) &print_data_base_flag
, 1, 1, 0, 0, 0,
251 "print-data-base", 0,
252 "Print make's internal database" },
253 { 'q', flag
, (char *) &question_flag
, 1, 1, 1, 0, 0,
255 "Run no commands; exit status says if up to date" },
256 { 'r', flag
, (char *) &no_builtin_rules_flag
, 1, 1, 0, 0, 0,
257 "no-builtin-rules", 0,
258 "Disable the built-in implicit rules" },
259 { 's', flag
, (char *) &silent_flag
, 1, 1, 0, 0, 0,
261 "Don't echo commands" },
262 { 'S', flag_off
, (char *) &keep_going_flag
, 1, 1, 0,
263 0, (char *) &default_keep_going_flag
,
266 { 't', flag
, (char *) &touch_flag
, 1, 1, 1, 0, 0,
268 "Touch targets instead of remaking them" },
269 { 'v', flag
, (char *) &print_version_flag
, 1, 1, 0, 0, 0,
271 "Print the version number of make and exit" },
272 { 'w', flag
, (char *) &print_directory_flag
, 1, 1, 0, 0, 0,
273 "print-directory", 0,
274 "Print the current directory" },
275 { 2, flag
, (char *) &inhibit_print_directory_flag
, 1, 1, 0, 0, 0,
276 "no-print-directory", 0,
277 "Turn off -w, even if it was turned on implicitly" },
278 { 'W', string
, (char *) &new_files
, 0, 0, 0, 0, 0,
280 "Consider FILE to be infinitely new" },
281 { 3, flag
, (char *) &warn_undefined_variables_flag
, 1, 1, 0, 0, 0,
282 "warn-undefined-variables", 0,
283 "Warn when an undefined variable is referenced" },
287 /* Secondary long names for options. */
289 static struct option long_option_aliases
[] =
291 { "quiet", no_argument
, 0, 's' },
292 { "stop", no_argument
, 0, 'S' },
293 { "new-file", required_argument
, 0, 'W' },
294 { "assume-new", required_argument
, 0, 'W' },
295 { "assume-old", required_argument
, 0, 'o' },
296 { "max-load", optional_argument
, 0, 'l' },
297 { "dry-run", no_argument
, 0, 'n' },
298 { "recon", no_argument
, 0, 'n' },
299 { "makefile", required_argument
, 0, 'f' },
302 /* The usage message prints the descriptions of options starting in
303 this column. Make sure it leaves enough room for the longest
304 description to fit in less than 80 characters. */
306 #define DESCRIPTION_COLUMN 30
308 /* List of goal targets. */
310 static struct dep
*goals
, *lastgoal
;
312 /* List of variables which were defined on the command line
313 (or, equivalently, in MAKEFLAGS). */
315 struct command_variable
317 struct command_variable
*next
;
318 struct variable
*variable
;
320 static struct command_variable
*command_variables
;
322 /* The name we were invoked with. */
326 /* Our current directory before processing any -C options. */
328 char *directory_before_chdir
;
330 /* Our current directory after processing all -C options. */
332 char *starting_directory
;
334 /* Value of the MAKELEVEL variable at startup (or 0). */
336 unsigned int makelevel
;
338 /* First file defined in the makefile whose name does not
339 start with `.'. This is the default to remake if the
340 command line does not specify. */
342 struct file
*default_goal_file
;
344 /* Pointer to structure for the file .DEFAULT
345 whose commands are used for any file that has none of its own.
346 This is zero if the makefiles do not define .DEFAULT. */
348 struct file
*default_file
;
350 /* Nonzero if we have seen the magic `.POSIX' target.
351 This turns on pedantic compliance with POSIX.2. */
355 /* Mask of signals that are being caught with fatal_error_signal. */
358 sigset_t fatal_signal_set
;
360 #ifdef HAVE_SIGSETMASK
361 int fatal_signal_mask
;
366 enter_command_line_file (name
)
371 char *expanded
= tilde_expand (name
);
373 name
= expanded
; /* Memory leak; I don't care. */
376 /* This is also done in parse_file_seq, so this is redundant
377 for names read from makefiles. It is here for names passed
378 on the command line. */
379 while (name
[0] == '.' && name
[1] == '/' && name
[2] != '\0')
383 /* Skip following slashes: ".//foo" is "foo", not "/foo". */
389 /* It was all slashes! Move back to the dot and truncate
390 it after the first slash, so it becomes just "./". */
393 while (name
[0] != '.');
397 return enter_file (savestring (name
, strlen (name
)));
400 /* Toggle -d on receipt of SIGUSR1. */
403 debug_signal_handler (sig
)
406 debug_flag
= ! debug_flag
;
410 main (argc
, argv
, envp
)
415 extern void init_dir ();
416 extern RETSIGTYPE
fatal_error_signal (), child_handler ();
417 register struct file
*f
;
418 register unsigned int i
;
420 struct dep
*read_makefiles
;
421 PATH_VAR (current_directory
);
423 default_goal_file
= 0;
424 reading_filename
= 0;
425 reading_lineno_ptr
= 0;
427 #ifndef HAVE_SYS_SIGLIST
432 sigemptyset (&fatal_signal_set
);
433 #define ADD_SIG(sig) sigaddset (&fatal_signal_set, sig)
435 #ifdef HAVE_SIGSETMASK
436 fatal_signal_mask
= 0;
437 #define ADD_SIG(sig) fatal_signal_mask |= sigmask (sig)
443 #define FATAL_SIG(sig) \
444 if (signal ((sig), fatal_error_signal) == SIG_IGN) \
445 (void) signal ((sig), SIG_IGN); \
455 FATAL_SIG (SIGDANGER
);
466 /* Make sure stdout is line-buffered. */
468 #ifdef HAVE_SETLINEBUF
471 #ifndef SETVBUF_REVERSED
472 setvbuf (stdout
, (char *) 0, _IOLBF
, BUFSIZ
);
473 #else /* setvbuf not reversed. */
474 /* Some buggy systems lose if we pass 0 instead of allocating ourselves. */
475 setvbuf (stdout
, _IOLBF
, xmalloc (BUFSIZ
), BUFSIZ
);
476 #endif /* setvbuf reversed. */
477 #endif /* setlinebuf missing. */
479 /* Initialize the directory hashing code. */
482 /* Figure out where this program lives. */
486 if (argv
[0][0] == '\0')
490 program
= rindex (argv
[0], '/');
493 program
= rindex (argv
[0], '\\');
495 program
= rindex (argv
[0], ':');
503 /* Set up to access user data (files). */
506 /* Figure out where we are. */
508 if (getcwd (current_directory
, GET_PATH_MAX
) == 0)
511 perror_with_name ("getcwd: ", "");
513 error ("getwd: %s", current_directory
);
515 current_directory
[0] = '\0';
516 directory_before_chdir
= 0;
519 directory_before_chdir
= savestring (current_directory
,
520 strlen (current_directory
));
522 /* Read in variables from the environment. It is important that this be
523 done before $(MAKE) is are figured out so its definitions will not be
524 one from the environment. */
526 for (i
= 0; envp
[i
] != 0; ++i
)
528 register char *ep
= envp
[i
];
531 /* The result of pointer arithmetic is cast to unsigned int for
532 machines where ptrdiff_t is a different size that doesn't widen
534 define_variable (envp
[i
], (unsigned int) (ep
- envp
[i
]),
536 /* Force exportation of every variable culled from the environment.
537 We used to rely on target_environment's v_default code to do this.
538 But that does not work for the case where an environment variable
539 is redefined in a makefile with `override'; it should then still
540 be exported, because it was originally in the environment. */
544 /* Decode the switches. */
546 decode_env_switches ("MAKEFLAGS", 9);
548 /* People write things like:
549 MFLAGS="CC=gcc -pipe" "CFLAGS=-g"
550 and we set the -p, -i and -e switches. Doesn't seem quite right. */
551 decode_env_switches ("MFLAGS", 6);
553 decode_switches (argc
, argv
, 0);
555 /* Print version information. */
557 if (print_version_flag
|| print_data_base_flag
|| debug_flag
)
560 /* `make --version' is supposed to just print the version and exit. */
561 if (print_version_flag
)
565 /* Set the "MAKE_COMMAND" variable to the name we were invoked with.
566 (If it is a relative pathname with a slash, prepend our directory name
567 so the result will run the same program regardless of the current dir.
568 If it is a name with no slash, we can only hope that PATH did not
569 find it in the current directory.) */
571 if (current_directory
[0] != '\0'
572 && argv
[0] != 0 && argv
[0][0] != '/' && index (argv
[0], '/') != 0)
573 argv
[0] = concat (current_directory
, "/", argv
[0]);
576 /* The extra indirection through $(MAKE_COMMAND) is done
577 for hysterical raisins. */
578 (void) define_variable ("MAKE_COMMAND", 12, argv
[0], o_default
, 0);
579 (void) define_variable ("MAKE", 4, "$(MAKE_COMMAND)", o_default
, 1);
581 if (command_variables
!= 0)
583 struct command_variable
*cv
;
585 unsigned int len
= 0;
588 /* Figure out how much space will be taken up by the command-line
589 variable definitions. */
590 for (cv
= command_variables
; cv
!= 0; cv
= cv
->next
)
593 len
+= 2 * strlen (v
->name
);
597 len
+= 2 * strlen (v
->value
);
600 /* Now allocate a buffer big enough and fill it. */
601 p
= value
= (char *) alloca (len
);
602 for (cv
= command_variables
; cv
!= 0; cv
= cv
->next
)
605 p
= quote_as_word (p
, v
->name
, 0);
609 p
= quote_as_word (p
, v
->value
, 0);
612 p
[-1] = '\0'; /* Kill the final space and terminate. */
614 /* Define an unchangeable variable with a name that no POSIX.2
615 makefile could validly use for its own variable. */
616 (void) define_variable ("-*-command-variables-*-", 23,
617 value
, o_automatic
, 0);
619 /* Define the variable; this will not override any user definition.
620 Normally a reference to this variable is written into the value of
621 MAKEFLAGS, allowing the user to override this value to affect the
622 exported value of MAKEFLAGS. In POSIX-pedantic mode, we cannot
623 allow the user's setting of MAKEOVERRIDES to affect MAKEFLAGS, so
624 a reference to this hidden variable is written instead. */
625 (void) define_variable ("MAKEOVERRIDES", 13,
626 "${-*-command-variables-*-}", o_env
, 1);
629 /* If there were -C flags, move ourselves about. */
630 if (directories
!= 0)
631 for (i
= 0; directories
->list
[i
] != 0; ++i
)
633 char *dir
= directories
->list
[i
];
636 char *expanded
= tilde_expand (dir
);
641 pfatal_with_name (dir
);
642 if (dir
!= directories
->list
[i
])
646 /* Figure out the level of recursion. */
648 struct variable
*v
= lookup_variable ("MAKELEVEL", 9);
649 if (v
!= 0 && *v
->value
!= '\0' && *v
->value
!= '-')
650 makelevel
= (unsigned int) atoi (v
->value
);
655 /* Except under -s, always do -w in sub-makes and under -C. */
656 if (!silent_flag
&& (directories
!= 0 || makelevel
> 0))
657 print_directory_flag
= 1;
659 /* Let the user disable that with --no-print-directory. */
660 if (inhibit_print_directory_flag
)
661 print_directory_flag
= 0;
663 /* Construct the list of include directories to search. */
665 construct_include_path (include_directories
== 0 ? (char **) 0
666 : include_directories
->list
);
668 /* Figure out where we are now, after chdir'ing. */
669 if (directories
== 0)
670 /* We didn't move, so we're still in the same place. */
671 starting_directory
= current_directory
;
674 if (getcwd (current_directory
, GET_PATH_MAX
) == 0)
677 perror_with_name ("getcwd: ", "");
679 error ("getwd: %s", current_directory
);
681 starting_directory
= 0;
684 starting_directory
= current_directory
;
687 /* Tell the user where he is. */
689 if (print_directory_flag
)
690 log_working_directory (1);
692 /* Read any stdin makefiles into temporary files. */
696 register unsigned int i
;
697 for (i
= 0; i
< makefiles
->idx
; ++i
)
698 if (makefiles
->list
[i
][0] == '-' && makefiles
->list
[i
][1] == '\0')
700 /* This makefile is standard input. Since we may re-exec
701 and thus re-read the makefiles, we read standard input
702 into a temporary file and read from that. */
705 /* Make a unique filename. */
707 static char name
[] = "/tmp/GmXXXXXX";
708 (void) mktemp (name
);
710 static char name
[L_tmpnam
];
714 outfile
= fopen (name
, "w");
716 pfatal_with_name ("fopen (temporary file)");
717 while (!feof (stdin
))
720 int n
= fread (buf
, 1, sizeof(buf
), stdin
);
721 if (n
> 0 && fwrite (buf
, 1, n
, outfile
) != n
)
722 pfatal_with_name ("fwrite (temporary file)");
724 /* Try to make sure we won't remake the temporary
725 file when we are re-exec'd. Kludge-o-matic! */
726 fprintf (outfile
, "%s:;\n", name
);
727 (void) fclose (outfile
);
729 /* Replace the name that read_all_makefiles will
730 see with the name of the temporary file. */
733 /* SGI compiler requires alloca's result be assigned simply. */
734 temp
= (char *) alloca (sizeof (name
));
735 bcopy (name
, temp
, sizeof (name
));
736 makefiles
->list
[i
] = temp
;
739 /* Make sure the temporary file will not be remade. */
740 f
= enter_file (savestring (name
, sizeof name
- 1));
742 f
->update_status
= 0;
743 f
->command_state
= cs_finished
;
744 /* Let it be removed when we're done. */
746 /* But don't mention it. */
751 /* Set up to handle children dying. This must be done before
752 reading in the makefiles so that `shell' function calls will work. */
755 (void) signal (SIGCHLD
, child_handler
);
758 (void) signal (SIGCLD
, child_handler
);
761 /* Let the user send us SIGUSR1 to toggle the -d flag during the run. */
763 (void) signal (SIGUSR1
, debug_signal_handler
);
766 /* Define the initial list of suffixes for old-style rules. */
768 set_default_suffixes ();
770 /* Define the file rules for the built-in suffix rules. These will later
771 be converted into pattern rules. We used to do this in
772 install_default_implicit_rules, but since that happens after reading
773 makefiles, it results in the built-in pattern rules taking precedence
774 over makefile-specified suffix rules, which is wrong. */
776 install_default_suffix_rules ();
778 /* Define some internal and special variables. */
780 define_automatic_variables ();
782 /* Set up the MAKEFLAGS and MFLAGS variables
783 so makefiles can look at them. */
785 define_makeflags (0, 0);
787 /* Define the default variables. */
788 define_default_variables ();
790 /* Read all the makefiles. */
792 default_file
= enter_file (".DEFAULT");
795 = read_all_makefiles (makefiles
== 0 ? (char **) 0 : makefiles
->list
);
797 /* Decode switches again, in case the variables were set by the makefile. */
798 decode_env_switches ("MAKEFLAGS", 9);
800 decode_env_switches ("MFLAGS", 6);
803 /* Set up MAKEFLAGS and MFLAGS again, so they will be right. */
805 define_makeflags (1, 0);
807 /* Make each `struct dep' point at the `struct file' for the file
808 depended on. Also do magic for special targets. */
812 /* Convert old-style suffix rules to pattern rules. It is important to
813 do this before installing the built-in pattern rules below, so that
814 makefile-specified suffix rules take precedence over built-in pattern
817 convert_to_pattern ();
819 /* Install the default implicit pattern rules.
820 This used to be done before reading the makefiles.
821 But in that case, built-in pattern rules were in the chain
822 before user-defined ones, so they matched first. */
824 install_default_implicit_rules ();
826 /* Compute implicit rule limits. */
828 count_implicit_rule_limits ();
830 /* Construct the listings of directories in VPATH lists. */
832 build_vpath_lists ();
834 /* Mark files given with -o flags as very old (00:00:01.00 Jan 1, 1970)
835 and as having been updated already, and files given with -W flags as
836 brand new (time-stamp as far as possible into the future). */
839 for (p
= old_files
->list
; *p
!= 0; ++p
)
841 f
= enter_command_line_file (*p
);
842 f
->last_mtime
= (time_t) 1;
844 f
->update_status
= 0;
845 f
->command_state
= cs_finished
;
850 for (p
= new_files
->list
; *p
!= 0; ++p
)
852 f
= enter_command_line_file (*p
);
853 f
->last_mtime
= NEW_MTIME
;
857 if (read_makefiles
!= 0)
859 /* Update any makefiles if necessary. */
861 time_t *makefile_mtimes
= 0;
862 unsigned int mm_idx
= 0;
865 puts ("Updating makefiles....");
867 /* Remove any makefiles we don't want to try to update.
868 Also record the current modtimes so we can compare them later. */
870 register struct dep
*d
, *last
;
875 register struct file
*f
= d
->file
;
877 for (f
= f
->double_colon
; f
!= NULL
; f
= f
->prev
)
879 if (f
->deps
== 0 && f
->cmds
!= 0)
881 /* This makefile is a :: target with commands, but
882 no dependencies. So, it will always be remade.
883 This might well cause an infinite loop, so don't
884 try to remake it. (This will only happen if
885 your makefiles are written exceptionally
886 stupidly; but if you work for Athena, that's how
887 you write your makefiles.) */
890 printf ("Makefile `%s' might loop; not remaking it.\n",
894 read_makefiles
= d
->next
;
896 last
->next
= d
->next
;
898 /* Free the storage. */
901 d
= last
== 0 ? 0 : last
->next
;
906 if (f
== NULL
|| !f
->double_colon
)
908 if (makefile_mtimes
== 0)
909 makefile_mtimes
= (time_t *) xmalloc (sizeof (time_t));
911 makefile_mtimes
= (time_t *)
912 xrealloc ((char *) makefile_mtimes
,
913 (mm_idx
+ 1) * sizeof (time_t));
914 makefile_mtimes
[mm_idx
++] = file_mtime_no_search (d
->file
);
921 /* Set up `MAKEFLAGS' specially while remaking makefiles. */
922 define_makeflags (1, 1);
924 switch (update_goal_chain (read_makefiles
, 1))
934 /* Failed to update. Figure out if we care. */
936 /* Nonzero if any makefile was successfully remade. */
938 /* Nonzero if any makefile we care about failed
939 in updating or could not be found at all. */
941 register unsigned int i
;
943 for (i
= 0; read_makefiles
!= 0; ++i
)
945 struct dep
*d
= read_makefiles
;
946 read_makefiles
= d
->next
;
947 if (d
->file
->updated
)
949 /* This makefile was updated. */
950 if (d
->file
->update_status
== 0)
952 /* It was successfully updated. */
953 any_remade
|= (file_mtime_no_search (d
->file
)
954 != makefile_mtimes
[i
]);
956 else if (! (d
->changed
& RM_DONTCARE
))
959 /* The update failed and this makefile was not
960 from the MAKEFILES variable, so we care. */
961 error ("Failed to remake makefile `%s'.",
963 mtime
= file_mtime_no_search (d
->file
);
964 any_remade
|= (mtime
!= (time_t) -1
965 && mtime
!= makefile_mtimes
[i
]);
969 /* This makefile was not found at all. */
970 if (! (d
->changed
& RM_DONTCARE
))
972 /* This is a makefile we care about. See how much. */
973 if (d
->changed
& RM_INCLUDED
)
974 /* An included makefile. We don't need
975 to die, but we do want to complain. */
976 error ("Included makefile `%s' was not found.",
980 /* A normal makefile. We must die later. */
981 error ("Makefile `%s' was not found", dep_name (d
));
999 /* Updated successfully. Re-exec ourselves. */
1001 remove_intermediates (0);
1003 if (print_data_base_flag
)
1006 if (print_directory_flag
)
1007 log_working_directory (0);
1011 /* These names might have changed. */
1012 register unsigned int i
, j
= 0;
1013 for (i
= 1; i
< argc
; ++i
)
1014 if (!strcmp (argv
[i
], "-f")) /* XXX */
1016 char *p
= &argv
[i
][2];
1018 argv
[++i
] = makefiles
->list
[j
];
1020 argv
[i
] = concat ("-f", makefiles
->list
[j
], "");
1025 if (directories
!= 0 && directories
->idx
> 0)
1028 if (directory_before_chdir
!= 0)
1030 if (chdir (directory_before_chdir
) < 0)
1032 perror_with_name ("chdir", "");
1041 fatal ("Couldn't change back to original directory.");
1044 for (p
= environ
; *p
!= 0; ++p
)
1045 if (!strncmp (*p
, "MAKELEVEL=", 10))
1047 /* The SGI compiler apparently can't understand
1048 the concept of storing the result of a function
1049 in something other than a local variable. */
1051 sgi_loses
= (char *) alloca (40);
1053 sprintf (*p
, "MAKELEVEL=%u", makelevel
);
1060 fputs ("Re-executing:", stdout
);
1061 for (p
= argv
; *p
!= 0; ++p
)
1069 exec_command (argv
, environ
);
1074 /* Set up `MAKEFLAGS' again for the normal targets. */
1075 define_makeflags (1, 0);
1080 /* If there were no command-line goals, use the default. */
1083 if (default_goal_file
!= 0)
1085 goals
= (struct dep
*) xmalloc (sizeof (struct dep
));
1088 goals
->file
= default_goal_file
;
1096 /* Update the goals. */
1099 puts ("Updating goal targets....");
1101 switch (update_goal_chain (goals
, 0))
1104 /* Nothing happened. */
1106 /* Updated successfully. */
1110 /* Updating failed. */
1114 /* We are under -q and would run some commands. */
1123 if (read_makefiles
== 0)
1124 fatal ("No targets specified and no makefile found");
1126 fatal ("No targets");
1136 /* Parsing of arguments, decoding of switches. */
1138 static char options
[1 + sizeof (switches
) / sizeof (switches
[0]) * 3];
1139 static struct option long_options
[(sizeof (switches
) / sizeof (switches
[0])) +
1140 (sizeof (long_option_aliases
) /
1141 sizeof (long_option_aliases
[0]))];
1143 /* Fill in the string and vector for getopt. */
1149 register unsigned int i
;
1151 if (options
[0] != '\0')
1157 /* Return switch and non-switch args in order, regardless of
1158 POSIXLY_CORRECT. Non-switch args are returned as option 1. */
1161 for (i
= 0; switches
[i
].c
!= '\0'; ++i
)
1163 long_options
[i
].name
= (switches
[i
].long_name
== 0 ? "" :
1164 switches
[i
].long_name
);
1165 long_options
[i
].flag
= 0;
1166 long_options
[i
].val
= switches
[i
].c
;
1167 if (isalnum (switches
[i
].c
))
1168 *p
++ = switches
[i
].c
;
1169 switch (switches
[i
].type
)
1174 long_options
[i
].has_arg
= no_argument
;
1180 if (isalnum (switches
[i
].c
))
1182 if (switches
[i
].noarg_value
!= 0)
1184 if (isalnum (switches
[i
].c
))
1186 long_options
[i
].has_arg
= optional_argument
;
1189 long_options
[i
].has_arg
= required_argument
;
1194 for (c
= 0; c
< (sizeof (long_option_aliases
) /
1195 sizeof (long_option_aliases
[0]));
1197 long_options
[i
++] = long_option_aliases
[c
];
1198 long_options
[i
].name
= 0;
1201 /* Decode switches from ARGC and ARGV.
1202 They came from the environment if ENV is nonzero. */
1205 decode_switches (argc
, argv
, env
)
1211 register const struct command_switch
*cs
;
1212 register struct stringlist
*sl
;
1215 /* getopt does most of the parsing for us.
1216 First, get its vectors set up. */
1220 /* Let getopt produce error messages for the command line,
1221 but not for options from the environment. */
1223 /* Reset getopt's state. */
1227 while (optind
< argc
)
1231 /* There are no more options according to getting getopt, but
1232 there are some arguments left. Since we have asked for
1233 non-option arguments to be returned in order, I think this
1234 only happens when there is a "--" argument to prevent later
1235 argument from being options. Since getopt has finished its
1236 job, just update its state variables for the next argument and
1237 set C as if it had returned 1, indicating a non-option
1239 optarg
= argv
[optind
++];
1243 /* Parse the next argument. */
1244 c
= getopt_long (argc
, argv
, options
, long_options
, (int *) 0);
1248 /* Non-option argument. It might be a variable definition. */
1250 v
= try_variable_definition ((char *) 0, 0, optarg
, o_command
);
1253 /* It is indeed a variable definition. Record a pointer to
1254 the variable for later use in define_makeflags. */
1255 struct command_variable
*cv
1256 = (struct command_variable
*) xmalloc (sizeof (*cv
));
1258 cv
->next
= command_variables
;
1259 command_variables
= cv
;
1263 /* Not an option or variable definition; it must be a goal
1264 target! Enter it as a file and add it to the dep chain of
1266 struct file
*f
= enter_command_line_file (optarg
);
1271 goals
= (struct dep
*) xmalloc (sizeof (struct dep
));
1277 = (struct dep
*) xmalloc (sizeof (struct dep
));
1278 lastgoal
= lastgoal
->next
;
1285 /* Bad option. We will print a usage message and die later.
1286 But continue to parse the other options so the user can
1287 see all he did wrong. */
1290 for (cs
= switches
; cs
->c
!= '\0'; ++cs
)
1293 /* Whether or not we will actually do anything with
1294 this switch. We test this individually inside the
1295 switch below rather than just once outside it, so that
1296 options which are to be ignored still consume args. */
1297 int doit
= !env
|| cs
->env
;
1310 *(int *) cs
->value_ptr
= cs
->type
== flag
;
1318 optarg
= cs
->noarg_value
;
1320 sl
= *(struct stringlist
**) cs
->value_ptr
;
1323 sl
= (struct stringlist
*)
1324 xmalloc (sizeof (struct stringlist
));
1327 sl
->list
= (char **) xmalloc (5 * sizeof (char *));
1328 *(struct stringlist
**) cs
->value_ptr
= sl
;
1330 else if (sl
->idx
== sl
->max
- 1)
1333 sl
->list
= (char **)
1334 xrealloc ((char *) sl
->list
,
1335 sl
->max
* sizeof (char *));
1337 sl
->list
[sl
->idx
++] = optarg
;
1338 sl
->list
[sl
->idx
] = 0;
1342 if (optarg
== 0 && argc
> optind
1343 && isdigit (argv
[optind
][0]))
1344 optarg
= argv
[optind
++];
1351 int i
= atoi (optarg
);
1355 error ("the `-%c' option requires a \
1356 positive integral argument",
1361 *(unsigned int *) cs
->value_ptr
= i
;
1364 *(unsigned int *) cs
->value_ptr
1365 = *(unsigned int *) cs
->noarg_value
;
1369 if (optarg
== 0 && optind
< argc
1370 && (isdigit (argv
[optind
][0]) || argv
[optind
][0] == '.'))
1371 optarg
= argv
[optind
++];
1374 *(double *) cs
->value_ptr
1375 = (optarg
!= 0 ? atof (optarg
)
1376 : *(double *) cs
->noarg_value
);
1381 /* We've found the switch. Stop looking. */
1386 if (!env
&& (bad
|| print_usage_flag
))
1388 /* Print a nice usage message. */
1391 if (print_version_flag
)
1394 usageto
= bad
? stderr
: stdout
;
1396 fprintf (usageto
, "Usage: %s [options] [target] ...\n", program
);
1398 fputs ("Options:\n", usageto
);
1399 for (cs
= switches
; cs
->c
!= '\0'; ++cs
)
1401 char buf
[1024], shortarg
[50], longarg
[50], *p
;
1403 if (cs
->description
[0] == '-')
1406 switch (long_options
[cs
- switches
].has_arg
)
1409 shortarg
[0] = longarg
[0] = '\0';
1411 case required_argument
:
1412 sprintf (longarg
, "=%s", cs
->argdesc
);
1413 sprintf (shortarg
, " %s", cs
->argdesc
);
1415 case optional_argument
:
1416 sprintf (longarg
, "[=%s]", cs
->argdesc
);
1417 sprintf (shortarg
, " [%s]", cs
->argdesc
);
1423 if (isalnum (cs
->c
))
1425 sprintf (buf
, " -%c%s", cs
->c
, shortarg
);
1428 if (cs
->long_name
!= 0)
1431 sprintf (p
, "%s--%s%s",
1432 !isalnum (cs
->c
) ? " " : ", ",
1433 cs
->long_name
, longarg
);
1435 for (i
= 0; i
< (sizeof (long_option_aliases
) /
1436 sizeof (long_option_aliases
[0]));
1438 if (long_option_aliases
[i
].val
== cs
->c
)
1440 sprintf (p
, ", --%s%s",
1441 long_option_aliases
[i
].name
, longarg
);
1446 const struct command_switch
*ncs
= cs
;
1447 while ((++ncs
)->c
!= '\0')
1448 if (ncs
->description
[0] == '-' &&
1449 ncs
->description
[1] == cs
->c
)
1451 /* This is another switch that does the same
1452 one as the one we are processing. We want
1453 to list them all together on one line. */
1454 sprintf (p
, ", -%c%s", ncs
->c
, shortarg
);
1456 if (ncs
->long_name
!= 0)
1458 sprintf (p
, ", --%s%s", ncs
->long_name
, longarg
);
1464 if (p
- buf
> DESCRIPTION_COLUMN
- 2)
1465 /* The list of option names is too long to fit on the same
1466 line with the description, leaving at least two spaces.
1467 Print it on its own line instead. */
1469 fprintf (usageto
, "%s\n", buf
);
1473 fprintf (usageto
, "%*s%s.\n",
1474 - DESCRIPTION_COLUMN
,
1475 buf
, cs
->description
);
1482 /* Decode switches from environment variable ENVAR (which is LEN chars long).
1483 We do this by chopping the value into a vector of words, prepending a
1484 dash to the first word if it lacks one, and passing the vector to
1488 decode_env_switches (envar
, len
)
1492 char *varref
= (char *) alloca (2 + len
+ 2);
1497 /* Get the variable's value. */
1500 bcopy (envar
, &varref
[2], len
);
1501 varref
[2 + len
] = ')';
1502 varref
[2 + len
+ 1] = '\0';
1503 value
= variable_expand (varref
);
1505 /* Skip whitespace, and check for an empty value. */
1506 value
= next_token (value
);
1507 len
= strlen (value
);
1511 /* Allocate a vector that is definitely big enough. */
1512 argv
= (char **) alloca ((1 + len
+ 1) * sizeof (char *));
1514 /* Allocate a buffer to copy the value into while we split it into words
1515 and unquote it. We must use permanent storage for this because
1516 decode_switches may store pointers into the passed argument words. */
1517 p
= (char *) xmalloc (2 * len
);
1519 /* getopt will look at the arguments starting at ARGV[1].
1520 Prepend a spacer word. */
1524 while (*value
!= '\0')
1527 ++value
; /* Skip the backslash. */
1528 else if (isblank (*value
))
1530 /* End of the word. */
1535 while (isblank (*value
));
1543 if (argc
== 2 && argv
[1][0] != '-')
1545 /* There is just one word in the value, and it is not a switch.
1546 Either this is the single-word form and we should prepend a dash
1547 before calling decode_switches, or this is the multi-word form and
1548 there is no dash because it is a variable definition. */
1550 v
= try_variable_definition ((char *) 0, 0, argv
[1], o_command
);
1553 /* It was indeed a variable definition, and now it has been
1554 processed. There is nothing for decode_switches to do.
1555 Record a pointer to the variable for later use in
1556 define_makeflags. */
1557 struct command_variable
*cv
1558 = (struct command_variable
*) xmalloc (sizeof (*cv
));
1560 cv
->next
= command_variables
;
1561 command_variables
= cv
;
1565 /* It wasn't a variable definition, so it's some switches without a
1566 leading dash. Add one and pass it along to decode_switches. We
1567 need permanent storage for this in case decode_switches saves
1568 pointers into the value. */
1569 argv
[1] = concat ("-", argv
[1], "");
1572 /* Parse those words. */
1573 decode_switches (argc
, argv
, 1);
1576 /* Quote the string IN so that it will be interpreted as a single word with
1577 no magic by the shell; if DOUBLE_DOLLARS is nonzero, also double dollar
1578 signs to avoid variable expansion in make itself. Write the result into
1579 OUT, returning the address of the next character to be written.
1580 Allocating space for OUT twice the length of IN (thrice if
1581 DOUBLE_DOLLARS is nonzero) is always sufficient. */
1584 quote_as_word (out
, in
, double_dollars
)
1590 if (index ("^;'\"*?[]$<>(){}|&~`\\ \t\r\n\f\v", *in
) != 0)
1592 if (double_dollars
&& *in
== '$')
1600 /* Define the MAKEFLAGS and MFLAGS variables to reflect the settings of the
1601 command switches. Include options with args if ALL is nonzero.
1602 Don't include options with the `no_makefile' flag set if MAKEFILE. */
1605 define_makeflags (all
, makefile
)
1608 static const char ref
[] = "$(MAKEOVERRIDES)";
1609 static const char posixref
[] = "$(-*-command-variables-*-)";
1610 register const struct command_switch
*cs
;
1616 /* We will construct a linked list of `struct flag's describing
1617 all the flags which need to go in MAKEFLAGS. Then, once we
1618 know how many there are and their lengths, we can put them all
1619 together in a string. */
1624 const struct command_switch
*cs
;
1627 struct flag
*flags
= 0;
1628 unsigned int flagslen
= 0;
1629 #define ADD_FLAG(ARG, LEN) \
1631 struct flag *new = (struct flag *) alloca (sizeof (struct flag)); \
1634 new->next = flags; \
1636 if (new->arg == 0) \
1637 ++flagslen; /* Just a single flag letter. */ \
1639 flagslen += 1 + 1 + 1 + 1 + 3 * (LEN); /* " -x foo" */ \
1640 if (!isalnum (cs->c)) \
1641 /* This switch has no single-letter version, so we use the long. */ \
1642 flagslen += 2 + strlen (cs->long_name); \
1645 for (cs
= switches
; cs
->c
!= '\0'; ++cs
)
1646 if (cs
->toenv
&& (!makefile
|| !cs
->no_makefile
))
1657 if (!*(int *) cs
->value_ptr
== (cs
->type
== flag_off
)
1658 && (cs
->default_value
== 0
1659 || *(int *) cs
->value_ptr
!= *(int *) cs
->default_value
))
1666 if ((cs
->default_value
!= 0
1667 && (*(unsigned int *) cs
->value_ptr
1668 == *(unsigned int *) cs
->default_value
)))
1670 else if (cs
->noarg_value
!= 0
1671 && (*(unsigned int *) cs
->value_ptr
==
1672 *(unsigned int *) cs
->noarg_value
))
1673 ADD_FLAG ("", 0); /* Optional value omitted; see below. */
1674 else if (cs
->c
== 'j')
1675 /* Special case for `-j'. */
1679 char *buf
= (char *) alloca (30);
1680 sprintf (buf
, "%u", *(unsigned int *) cs
->value_ptr
);
1681 ADD_FLAG (buf
, strlen (buf
));
1689 if (cs
->default_value
!= 0
1690 && (*(double *) cs
->value_ptr
1691 == *(double *) cs
->default_value
))
1693 else if (cs
->noarg_value
!= 0
1694 && (*(double *) cs
->value_ptr
1695 == *(double *) cs
->noarg_value
))
1696 ADD_FLAG ("", 0); /* Optional value omitted; see below. */
1699 char *buf
= (char *) alloca (100);
1700 sprintf (buf
, "%g", *(double *) cs
->value_ptr
);
1701 ADD_FLAG (buf
, strlen (buf
));
1709 struct stringlist
*sl
= *(struct stringlist
**) cs
->value_ptr
;
1712 /* Add the elements in reverse order, because
1713 all the flags get reversed below; and the order
1714 matters for some switches (like -I). */
1715 register unsigned int i
= sl
->idx
;
1717 ADD_FLAG (sl
->list
[i
], strlen (sl
->list
[i
]));
1723 flagslen
+= 4 + sizeof posixref
; /* Four more for the possible " -- ". */
1727 /* Construct the value in FLAGSTRING.
1728 We allocate enough space for a preceding dash and trailing null. */
1729 flagstring
= (char *) alloca (1 + flagslen
+ 1);
1735 /* Add the flag letter or name to the string. */
1736 if (!isalnum (flags
->cs
->c
))
1739 strcpy (p
, flags
->cs
->long_name
);
1743 *p
++ = flags
->cs
->c
;
1744 if (flags
->arg
!= 0)
1746 /* A flag that takes an optional argument which in this case is
1747 omitted is specified by ARG being "". We must distinguish
1748 because a following flag appended without an intervening " -"
1749 is considered the arg for the first. */
1750 if (flags
->arg
[0] != '\0')
1752 /* Add its argument too. */
1753 *p
++ = !isalnum (flags
->cs
->c
) ? '=' : ' ';
1754 p
= quote_as_word (p
, flags
->arg
, 1);
1757 /* Write a following space and dash, for the next flag. */
1761 else if (!isalnum (flags
->cs
->c
))
1764 /* Long options must each go in their own word,
1765 so we write the following space and dash. */
1769 flags
= flags
->next
;
1772 if (all
&& command_variables
!= 0)
1774 /* Now write a reference to $(MAKEOVERRIDES), which contains all the
1775 command-line variable definitions. */
1777 if (p
== &flagstring
[1])
1778 /* No flags written, so elide the leading dash already written. */
1782 /* Separate the variables from the switches with a "--" arg. */
1785 /* We did not already write a trailing " -". */
1789 /* There is a trailing " -"; fill it out to " -- ". */
1794 /* Copy in the string. */
1797 bcopy (posixref
, p
, sizeof posixref
- 1);
1798 p
+= sizeof posixref
- 1;
1802 bcopy (ref
, p
, sizeof ref
- 1);
1803 p
+= sizeof ref
- 1;
1806 else if (p
== &flagstring
[1])
1811 else if (p
[-1] == '-')
1812 /* Kill the final space and dash. */
1814 /* Terminate the string. */
1817 v
= define_variable ("MAKEFLAGS", 9,
1818 /* If there is just a single word of switches,
1819 omit the leading dash unless it is a single
1820 long option with two leading dashes. */
1821 &flagstring
[(words
== 1 && command_variables
== 0
1822 && flagstring
[1] != '-')
1824 /* This used to use o_env, but that lost when a
1825 makefile defined MAKEFLAGS. Makefiles set
1826 MAKEFLAGS to add switches, but we still want
1827 to redefine its value with the full set of
1828 switches. Of course, an override or command
1829 definition will still take precedence. */
1832 /* The first time we are called, set MAKEFLAGS to always be exported.
1833 We should not do this again on the second call, because that is
1834 after reading makefiles which might have done `unexport MAKEFLAGS'. */
1835 v
->export
= v_export
;
1836 /* Since MFLAGS is not parsed for flags, there is no reason to
1837 override any makefile redefinition. */
1838 (void) define_variable ("MFLAGS", 6, flagstring
, o_env
, 1);
1841 /* Print version information. */
1846 static int printed_version
= 0;
1848 char *precede
= print_data_base_flag
? "# " : "";
1850 if (printed_version
)
1851 /* Do it only once. */
1854 printf ("%sGNU Make version %s", precede
, version_string
);
1855 if (remote_description
!= 0 && *remote_description
!= '\0')
1856 printf ("-%s", remote_description
);
1858 printf (", by Richard Stallman and Roland McGrath.\n\
1859 %sCopyright (C) 1988, 89, 90, 91, 92, 93, 94, 95 Free Software Foundation, Inc.\n\
1860 %sThis is free software; see the source for copying conditions.\n\
1861 %sThere is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A\n\
1862 %sPARTICULAR PURPOSE.\n\n", precede
, precede
, precede
, precede
);
1864 printed_version
= 1;
1866 /* Flush stdout so the user doesn't have to wait to see the
1867 version information while things are thought about. */
1871 /* Print a bunch of information about this and that. */
1876 extern char *ctime ();
1879 when
= time ((time_t *) 0);
1880 printf ("\n# Make data base, printed on %s", ctime (&when
));
1882 print_variable_data_base ();
1883 print_dir_data_base ();
1884 print_rule_data_base ();
1885 print_file_data_base ();
1886 print_vpath_data_base ();
1888 when
= time ((time_t *) 0);
1889 printf ("\n# Finished Make data base on %s\n", ctime (&when
));
1892 /* Exit with STATUS, cleaning up as necessary. */
1898 static char dying
= 0;
1906 /* Try to move back to the original directory. This is essential on
1907 MS-DOS (where there is really only one process), and on Unix it
1908 puts core files in the original directory instead of the -C
1910 if (directory_before_chdir
!= 0)
1911 chdir (directory_before_chdir
);
1913 if (print_version_flag
)
1916 /* Wait for children to die. */
1917 for (err
= status
!= 0; job_slots_used
> 0; err
= 0)
1918 reap_children (1, err
);
1920 /* Remove the intermediate files. */
1921 remove_intermediates (0);
1923 if (print_data_base_flag
)
1926 if (print_directory_flag
)
1927 log_working_directory (0);
1933 /* Write a message indicating that we've just entered or
1934 left (according to ENTERING) the current directory. */
1937 log_working_directory (entering
)
1940 static int entered
= 0;
1941 char *message
= entering
? "Entering" : "Leaving";
1946 /* Don't print the leaving message if we
1947 haven't printed the entering message. */
1950 if (print_data_base_flag
)
1951 fputs ("# ", stdout
);
1954 printf ("%s: %s ", program
, message
);
1956 printf ("%s[%u]: %s ", program
, makelevel
, message
);
1958 if (starting_directory
== 0)
1959 puts ("an unknown directory");
1961 printf ("directory `%s'\n", starting_directory
);