1 /* Argument parsing and main program of GNU Make.
2 Copyright (C) 1988, 89, 90, 91, 94 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 ();
50 /* The structure that describes an accepted command switch. */
54 char c
; /* The switch character. */
56 enum /* Type of the value. */
58 flag
, /* Turn int flag on. */
59 flag_off
, /* Turn int flag off. */
60 string
, /* One string per switch. */
61 positive_int
, /* A positive integer. */
62 floating
, /* A floating-point number (double). */
66 char *value_ptr
; /* Pointer to the value-holding variable. */
68 unsigned int env
:1; /* Can come from MAKEFLAGS. */
69 unsigned int toenv
:1; /* Should be put in MAKEFLAGS. */
70 unsigned int no_makefile
:1; /* Don't propagate when remaking makefiles. */
72 char *noarg_value
; /* Pointer to value used if no argument is given. */
73 char *default_value
;/* Pointer to default value. */
75 char *long_name
; /* Long option name. */
76 char *argdesc
; /* Descriptive word for argument. */
77 char *description
; /* Description for usage message. */
81 /* The structure used to hold the list of strings given
82 in command switches of a type that takes string arguments. */
86 char **list
; /* Nil-terminated list of strings. */
87 unsigned int idx
; /* Index into above. */
88 unsigned int max
; /* Number of pointers allocated. */
92 /* The recognized command switches. */
94 /* Nonzero means do not print commands to be executed (-s). */
98 /* Nonzero means just touch the files
99 that would appear to need remaking (-t) */
103 /* Nonzero means just print what commands would need to be executed,
104 don't actually execute them (-n). */
108 /* Print debugging trace info (-d). */
112 /* Environment variables override makefile definitions. */
114 int env_overrides
= 0;
116 /* Nonzero means ignore status codes returned by commands
117 executed to remake files. Just treat them all as successful (-i). */
119 int ignore_errors_flag
= 0;
121 /* Nonzero means don't remake anything, just print the data base
122 that results from reading the makefile (-p). */
124 int print_data_base_flag
= 0;
126 /* Nonzero means don't remake anything; just return a nonzero status
127 if the specified targets are not up to date (-q). */
129 int question_flag
= 0;
131 /* Nonzero means do not use any of the builtin rules (-r). */
133 int no_builtin_rules_flag
= 0;
135 /* Nonzero means keep going even if remaking some file fails (-k). */
138 int default_keep_going_flag
= 0;
140 /* Nonzero means print directory before starting and when done (-w). */
142 int print_directory_flag
= 0;
144 /* Nonzero means ignore print_directory_flag and never print the directory.
145 This is necessary because print_directory_flag is set implicitly. */
147 int inhibit_print_directory_flag
= 0;
149 /* Nonzero means print version information. */
151 int print_version_flag
= 0;
153 /* List of makefiles given with -f switches. */
155 static struct stringlist
*makefiles
= 0;
158 /* Number of job slots (commands that can be run at once). */
160 unsigned int job_slots
= 1;
161 unsigned int default_job_slots
= 1;
163 /* Value of job_slots that means no limit. */
165 static unsigned int inf_jobs
= 0;
167 /* Maximum load average at which multiple jobs will be run.
168 Negative values mean unlimited, while zero means limit to
169 zero load (which could be useful to start infinite jobs remotely
170 but one at a time locally). */
172 double max_load_average
= -1.0;
173 double default_load_average
= -1.0;
175 /* List of directories given with -C switches. */
177 static struct stringlist
*directories
= 0;
179 /* List of include directories given with -I switches. */
181 static struct stringlist
*include_directories
= 0;
183 /* List of files given with -o switches. */
185 static struct stringlist
*old_files
= 0;
187 /* List of files given with -W switches. */
189 static struct stringlist
*new_files
= 0;
191 /* If nonzero, we should just print usage and exit. */
193 static int print_usage_flag
= 0;
195 /* If nonzero, we should print a warning message
196 for each reference to an undefined variable. */
198 int warn_undefined_variables_flag
;
200 /* The table of command switches. */
202 static const struct command_switch switches
[] =
204 { 'b', ignore
, 0, 0, 0, 0, 0, 0,
206 "Ignored for compatibility" },
207 { 'C', string
, (char *) &directories
, 0, 0, 0, 0, 0,
208 "directory", "DIRECTORY",
209 "Change to DIRECTORY before doing anything" },
210 { 'd', flag
, (char *) &debug_flag
, 1, 1, 0, 0, 0,
212 "Print lots of debugging information" },
213 { 'e', flag
, (char *) &env_overrides
, 1, 1, 0, 0, 0,
214 "environment-overrides", 0,
215 "Environment variables override makefiles" },
216 { 'f', string
, (char *) &makefiles
, 0, 0, 0, 0, 0,
218 "Read FILE as a makefile" },
219 { 'h', flag
, (char *) &print_usage_flag
, 0, 0, 0, 0, 0,
221 "Print this message and exit" },
222 { 'i', flag
, (char *) &ignore_errors_flag
, 1, 1, 0, 0, 0,
224 "Ignore errors from commands" },
225 { 'I', string
, (char *) &include_directories
, 1, 1, 0, 0, 0,
226 "include-dir", "DIRECTORY",
227 "Search DIRECTORY for included makefiles" },
228 { 'j', positive_int
, (char *) &job_slots
, 1, 1, 0,
229 (char *) &inf_jobs
, (char *) &default_job_slots
,
231 "Allow N jobs at once; infinite jobs with no arg" },
232 { 'k', flag
, (char *) &keep_going_flag
, 1, 1, 0,
233 0, (char *) &default_keep_going_flag
,
235 "Keep going when some targets can't be made" },
236 { 'l', floating
, (char *) &max_load_average
, 1, 1, 0,
237 (char *) &default_load_average
, (char *) &default_load_average
,
239 "Don't start multiple jobs unless load is below N" },
240 { 'm', ignore
, 0, 0, 0, 0, 0, 0,
243 { 'n', flag
, (char *) &just_print_flag
, 1, 1, 1, 0, 0,
245 "Don't actually run any commands; just print them" },
246 { 'o', string
, (char *) &old_files
, 0, 0, 0, 0, 0,
248 "Consider FILE to be very old and don't remake it" },
249 { 'p', flag
, (char *) &print_data_base_flag
, 1, 1, 0, 0, 0,
250 "print-data-base", 0,
251 "Print make's internal database" },
252 { 'q', flag
, (char *) &question_flag
, 1, 1, 1, 0, 0,
254 "Run no commands; exit status says if up to date" },
255 { 'r', flag
, (char *) &no_builtin_rules_flag
, 1, 1, 0, 0, 0,
256 "no-builtin-rules", 0,
257 "Disable the built-in implicit rules" },
258 { 's', flag
, (char *) &silent_flag
, 1, 1, 0, 0, 0,
260 "Don't echo commands" },
261 { 'S', flag_off
, (char *) &keep_going_flag
, 1, 1, 0,
262 0, (char *) &default_keep_going_flag
,
265 { 't', flag
, (char *) &touch_flag
, 1, 1, 1, 0, 0,
267 "Touch targets instead of remaking them" },
268 { 'v', flag
, (char *) &print_version_flag
, 1, 1, 0, 0, 0,
270 "Print the version number of make and exit" },
271 { 'w', flag
, (char *) &print_directory_flag
, 1, 1, 0, 0, 0,
272 "print-directory", 0,
273 "Print the current directory" },
274 { 1, flag
, (char *) &inhibit_print_directory_flag
, 1, 1, 0, 0, 0,
275 "no-print-directory", 0,
276 "Turn off -w, even if it was turned on implicitly" },
277 { 'W', string
, (char *) &new_files
, 0, 0, 0, 0, 0,
279 "Consider FILE to be infinitely new" },
280 { 2, flag
, (char *) &warn_undefined_variables_flag
, 1, 1, 0, 0, 0,
281 "warn-undefined-variables", 0,
282 "Warn when an undefined variable is referenced" },
286 /* Secondary long names for options. */
288 static struct option long_option_aliases
[] =
290 { "quiet", no_argument
, 0, 's' },
291 { "stop", no_argument
, 0, 'S' },
292 { "new-file", required_argument
, 0, 'W' },
293 { "assume-new", required_argument
, 0, 'W' },
294 { "assume-old", required_argument
, 0, 'o' },
295 { "max-load", optional_argument
, 0, 'l' },
296 { "dry-run", no_argument
, 0, 'n' },
297 { "recon", no_argument
, 0, 'n' },
298 { "makefile", required_argument
, 0, 'f' },
301 /* The usage message prints the descriptions of options starting in
302 this column. Make sure it leaves enough room for the longest
303 description to fit in less than 80 characters. */
305 #define DESCRIPTION_COLUMN 30
307 /* List of non-switch arguments. */
309 struct stringlist
*other_args
= 0;
311 /* The name we were invoked with. */
315 /* Our current directory before processing any -C options. */
317 char *directory_before_chdir
;
319 /* Our current directory after processing all -C options. */
321 char *starting_directory
;
323 /* Value of the MAKELEVEL variable at startup (or 0). */
325 unsigned int makelevel
;
327 /* First file defined in the makefile whose name does not
328 start with `.'. This is the default to remake if the
329 command line does not specify. */
331 struct file
*default_goal_file
;
333 /* Pointer to structure for the file .DEFAULT
334 whose commands are used for any file that has none of its own.
335 This is zero if the makefiles do not define .DEFAULT. */
337 struct file
*default_file
;
339 /* Mask of signals that are being caught with fatal_error_signal. */
342 sigset_t fatal_signal_set
;
344 #ifdef HAVE_SIGSETMASK
345 int fatal_signal_mask
;
350 enter_command_line_file (name
)
355 char *expanded
= tilde_expand (name
);
357 name
= expanded
; /* Memory leak; I don't care. */
360 /* This is also done in parse_file_seq, so this is redundant
361 for names read from makefiles. It is here for names passed
362 on the command line. */
363 while (name
[0] == '.' && name
[1] == '/' && name
[2] != '\0')
367 /* Skip following slashes: ".//foo" is "foo", not "/foo". */
373 /* It was all slashes! Move back to the dot and truncate
374 it after the first slash, so it becomes just "./". */
377 while (name
[0] != '.');
381 return enter_file (savestring (name
, strlen (name
)));
385 main (argc
, argv
, envp
)
390 extern void init_dir ();
391 extern RETSIGTYPE
fatal_error_signal (), child_handler ();
392 register struct file
*f
;
393 register unsigned int i
;
394 register char *cmd_defs
;
395 register unsigned int cmd_defs_len
, cmd_defs_idx
;
397 struct dep
*goals
= 0;
398 register struct dep
*lastgoal
;
399 struct dep
*read_makefiles
;
400 PATH_VAR (current_directory
);
402 default_goal_file
= 0;
403 reading_filename
= 0;
404 reading_lineno_ptr
= 0;
406 #ifndef HAVE_SYS_SIGLIST
411 sigemptyset (&fatal_signal_set
);
412 #define ADD_SIG(sig) sigaddset (&fatal_signal_set, sig)
414 #ifdef HAVE_SIGSETMASK
415 fatal_signal_mask
= 0;
416 #define ADD_SIG(sig) fatal_signal_mask |= sigmask (sig)
422 #define FATAL_SIG(sig) \
423 if (signal ((sig), fatal_error_signal) == SIG_IGN) \
424 (void) signal ((sig), SIG_IGN); \
434 FATAL_SIG (SIGDANGER
);
445 /* Make sure stdout is line-buffered. */
447 #ifdef HAVE_SETLINEBUF
450 #ifndef SETVBUF_REVERSED
451 setvbuf (stdout
, (char *) 0, _IOLBF
, BUFSIZ
);
452 #else /* setvbuf not reversed. */
453 /* Some buggy systems lose if we pass 0 instead of allocating ourselves. */
454 setvbuf (stdout
, _IOLBF
, xmalloc (BUFSIZ
), BUFSIZ
);
455 #endif /* setvbuf reversed. */
456 #endif /* setlinebuf missing. */
458 /* Initialize the directory hashing code. */
461 /* Figure out where this program lives. */
465 if (argv
[0][0] == '\0')
469 program
= rindex (argv
[0], '/');
472 program
= rindex (argv
[0], '\\');
474 program
= rindex (argv
[0], ':');
482 /* Set up to access user data (files). */
485 /* Figure out where we are. */
487 if (getcwd (current_directory
, GET_PATH_MAX
) == 0)
490 perror_with_name ("getcwd: ", "");
492 error ("getwd: %s", current_directory
);
494 current_directory
[0] = '\0';
495 directory_before_chdir
= 0;
498 directory_before_chdir
= savestring (current_directory
,
499 strlen (current_directory
));
501 /* Read in variables from the environment. It is important that this be
502 done before `MAKE' and `MAKEOVERRIDES' are figured out so their
503 definitions will not be ones from the environment. */
505 for (i
= 0; envp
[i
] != 0; ++i
)
507 register char *ep
= envp
[i
];
510 /* The result of pointer arithmetic is cast to unsigned int for
511 machines where ptrdiff_t is a different size that doesn't widen
513 define_variable (envp
[i
], (unsigned int) (ep
- envp
[i
]),
515 /* Force exportation of every variable culled from the environment.
516 We used to rely on target_environment's v_default code to do this.
517 But that does not work for the case where an environment variable
518 is redefined in a makefile with `override'; it should then still
519 be exported, because it was originally in the environment. */
523 /* Decode the switches. */
525 decode_env_switches ("MAKEFLAGS", 9);
527 /* People write things like:
528 MFLAGS="CC=gcc -pipe" "CFLAGS=-g"
529 and we set the -p, -i and -e switches. Doesn't seem quite right. */
530 decode_env_switches ("MFLAGS", 6);
532 decode_switches (argc
, argv
, 0);
534 /* Print version information. */
536 if (print_version_flag
|| print_data_base_flag
|| debug_flag
)
539 /* `make --version' is supposed to just print the version and exit. */
540 if (print_version_flag
)
543 /* Search for command line arguments that define variables,
544 and do the definitions. Also save up the text of these
545 arguments in CMD_DEFS so we can put them into the values
546 of $(MAKEOVERRIDES) and $(MAKE). */
549 cmd_defs
= (char *) xmalloc (cmd_defs_len
);
552 for (i
= 1; other_args
->list
[i
] != 0; ++i
)
554 if (other_args
->list
[i
][0] == '\0')
555 /* Ignore empty arguments, so they can't kill enter_file. */
558 /* Try a variable definition. */
559 if (try_variable_definition ((char *) 0, 0,
560 other_args
->list
[i
], o_command
))
562 /* It succeeded. The variable is already defined.
563 Backslash-quotify it and append it to CMD_DEFS, then clobber it
564 to 0 in the list so that it won't be taken for a goal target. */
565 register char *p
= other_args
->list
[i
];
566 unsigned int l
= strlen (p
);
567 if (cmd_defs_idx
+ (l
* 2) + 1 > cmd_defs_len
)
569 if (l
* 2 > cmd_defs_len
)
570 cmd_defs_len
+= l
* 2;
573 cmd_defs
= (char *) xrealloc (cmd_defs
, cmd_defs_len
);
578 if (index ("^;'\"*?[]$<>(){}|&~`\\ \t\r\n\f\v", *p
) != 0)
579 cmd_defs
[cmd_defs_idx
++] = '\\';
580 cmd_defs
[cmd_defs_idx
++] = *p
++;
582 cmd_defs
[cmd_defs_idx
++] = ' ';
586 /* It was not a variable definition, so it is a target to be made.
587 Enter it as a file and add it to the dep chain of goals. */
588 f
= enter_command_line_file (other_args
->list
[i
]);
593 goals
= (struct dep
*) xmalloc (sizeof (struct dep
));
598 lastgoal
->next
= (struct dep
*) xmalloc (sizeof (struct dep
));
599 lastgoal
= lastgoal
->next
;
606 if (cmd_defs_idx
> 0)
608 cmd_defs
[cmd_defs_idx
- 1] = '\0';
609 (void) define_variable ("MAKEOVERRIDES", 13, cmd_defs
, o_default
, 0);
614 /* Set the "MAKE_COMMAND" variable to the name we were invoked with.
615 (If it is a relative pathname with a slash, prepend our directory name
616 so the result will run the same program regardless of the current dir.
617 If it is a name with no slash, we can only hope that PATH did not
618 find it in the current directory.) */
620 if (current_directory
[0] != '\0'
621 && argv
[0] != 0 && argv
[0][0] != '/' && index (argv
[0], '/') != 0)
622 argv
[0] = concat (current_directory
, "/", argv
[0]);
625 (void) define_variable ("MAKE_COMMAND", 12, argv
[0], o_default
, 0);
627 /* Append the command-line variable definitions gathered above
628 so sub-makes will get them as command-line definitions. */
630 (void) define_variable ("MAKE", 4,
631 "$(MAKE_COMMAND) $(MAKEOVERRIDES)", o_default
, 1);
633 /* If there were -C flags, move ourselves about. */
635 if (directories
!= 0)
636 for (i
= 0; directories
->list
[i
] != 0; ++i
)
638 char *dir
= directories
->list
[i
];
641 char *expanded
= tilde_expand (dir
);
646 pfatal_with_name (dir
);
647 if (dir
!= directories
->list
[i
])
651 /* Figure out the level of recursion. */
653 struct variable
*v
= lookup_variable ("MAKELEVEL", 9);
654 if (v
!= 0 && *v
->value
!= '\0' && *v
->value
!= '-')
655 makelevel
= (unsigned int) atoi (v
->value
);
660 /* Except under -s, always do -w in sub-makes and under -C. */
661 if (!silent_flag
&& (directories
!= 0 || makelevel
> 0))
662 print_directory_flag
= 1;
664 /* Let the user disable that with --no-print-directory. */
665 if (inhibit_print_directory_flag
)
666 print_directory_flag
= 0;
668 /* Construct the list of include directories to search. */
670 construct_include_path (include_directories
== 0 ? (char **) 0
671 : include_directories
->list
);
673 /* Figure out where we are now, after chdir'ing. */
674 if (directories
== 0)
675 /* We didn't move, so we're still in the same place. */
676 starting_directory
= current_directory
;
679 if (getcwd (current_directory
, GET_PATH_MAX
) == 0)
682 perror_with_name ("getcwd: ", "");
684 error ("getwd: %s", current_directory
);
686 starting_directory
= 0;
689 starting_directory
= current_directory
;
692 /* Tell the user where he is. */
694 if (print_directory_flag
)
695 log_working_directory (1);
697 /* Read any stdin makefiles into temporary files. */
701 register unsigned int i
;
702 for (i
= 0; i
< makefiles
->idx
; ++i
)
703 if (makefiles
->list
[i
][0] == '-' && makefiles
->list
[i
][1] == '\0')
705 /* This makefile is standard input. Since we may re-exec
706 and thus re-read the makefiles, we read standard input
707 into a temporary file and read from that. */
708 static char name
[] = "/tmp/GmXXXXXX";
711 /* Make a unique filename. */
712 (void) mktemp (name
);
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 /* Define the initial list of suffixes for old-style rules. */
763 set_default_suffixes ();
765 /* Define the file rules for the built-in suffix rules. These will later
766 be converted into pattern rules. We used to do this in
767 install_default_implicit_rules, but since that happens after reading
768 makefiles, it results in the built-in pattern rules taking precedence
769 over makefile-specified suffix rules, which is wrong. */
771 install_default_suffix_rules ();
773 /* Define some internal and special variables. */
775 define_automatic_variables ();
777 /* Set up the MAKEFLAGS and MFLAGS variables
778 so makefiles can look at them. */
780 define_makeflags (0, 0);
782 /* Define the default variables. */
783 define_default_variables ();
785 /* Read all the makefiles. */
787 default_file
= enter_file (".DEFAULT");
790 = read_all_makefiles (makefiles
== 0 ? (char **) 0 : makefiles
->list
);
792 /* Decode switches again, in case the variables were set by the makefile. */
793 decode_env_switches ("MAKEFLAGS", 9);
795 decode_env_switches ("MFLAGS", 6);
798 /* Set up MAKEFLAGS and MFLAGS again, so they will be right. */
800 define_makeflags (1, 0);
802 ignore_errors_flag
|= lookup_file (".IGNORE") != 0;
804 silent_flag
|= lookup_file (".SILENT") != 0;
806 /* Make each `struct dep' point at the
807 `struct file' for the file depended on. */
811 /* Convert old-style suffix rules to pattern rules. It is important to
812 do this before installing the built-in pattern rules below, so that
813 makefile-specified suffix rules take precedence over built-in pattern
816 convert_to_pattern ();
818 /* Install the default implicit pattern rules.
819 This used to be done before reading the makefiles.
820 But in that case, built-in pattern rules were in the chain
821 before user-defined ones, so they matched first. */
823 install_default_implicit_rules ();
825 /* Compute implicit rule limits. */
827 count_implicit_rule_limits ();
829 /* Construct the listings of directories in VPATH lists. */
831 build_vpath_lists ();
833 /* Mark files given with -o flags as very old (00:00:01.00 Jan 1, 1970)
834 and as having been updated already, and files given with -W flags as
835 brand new (time-stamp as far as possible into the future). */
838 for (p
= old_files
->list
; *p
!= 0; ++p
)
840 f
= enter_command_line_file (*p
);
841 f
->last_mtime
= (time_t) 1;
843 f
->update_status
= 0;
844 f
->command_state
= cs_finished
;
849 for (p
= new_files
->list
; *p
!= 0; ++p
)
851 f
= enter_command_line_file (*p
);
852 f
->last_mtime
= NEW_MTIME
;
856 if (read_makefiles
!= 0)
858 /* Update any makefiles if necessary. */
860 time_t *makefile_mtimes
= 0;
861 unsigned int mm_idx
= 0;
864 puts ("Updating makefiles....");
866 /* Remove any makefiles we don't want to try to update.
867 Also record the current modtimes so we can compare them later. */
869 register struct dep
*d
, *last
;
874 register struct file
*f
= d
->file
;
876 for (f
= f
->double_colon
; f
!= NULL
; f
= f
->prev
)
878 if (f
->deps
== 0 && f
->cmds
!= 0)
880 /* This makefile is a :: target with commands, but
881 no dependencies. So, it will always be remade.
882 This might well cause an infinite loop, so don't
883 try to remake it. (This will only happen if
884 your makefiles are written exceptionally
885 stupidly; but if you work for Athena, that's how
886 you write your makefiles.) */
889 printf ("Makefile `%s' might loop; not remaking it.\n",
893 read_makefiles
= d
->next
;
895 last
->next
= d
->next
;
897 /* Free the storage. */
900 d
= last
== 0 ? 0 : last
->next
;
905 if (f
== NULL
|| !f
->double_colon
)
907 if (makefile_mtimes
== 0)
908 makefile_mtimes
= (time_t *) xmalloc (sizeof (time_t));
910 makefile_mtimes
= (time_t *)
911 xrealloc ((char *) makefile_mtimes
,
912 (mm_idx
+ 1) * sizeof (time_t));
913 makefile_mtimes
[mm_idx
++] = file_mtime_no_search (d
->file
);
920 /* Set up `MAKEFLAGS' specially while remaking makefiles. */
921 define_makeflags (1, 1);
923 switch (update_goal_chain (read_makefiles
, 1))
933 /* Failed to update. Figure out if we care. */
935 /* Nonzero if any makefile was successfully remade. */
937 /* Nonzero if any makefile we care about failed
938 in updating or could not be found at all. */
940 register unsigned int i
;
942 for (i
= 0; read_makefiles
!= 0; ++i
)
944 struct dep
*d
= read_makefiles
;
945 read_makefiles
= d
->next
;
946 if (d
->file
->updated
)
948 /* This makefile was updated. */
949 if (d
->file
->update_status
== 0)
951 /* It was successfully updated. */
952 any_remade
|= (file_mtime_no_search (d
->file
)
953 != makefile_mtimes
[i
]);
955 else if (! (d
->changed
& RM_DONTCARE
))
958 /* The update failed and this makefile was not
959 from the MAKEFILES variable, so we care. */
960 error ("Failed to remake makefile `%s'.",
962 mtime
= file_mtime_no_search (d
->file
);
963 any_remade
|= (mtime
!= (time_t) -1
964 && mtime
!= makefile_mtimes
[i
]);
968 /* This makefile was not found at all. */
969 if (! (d
->changed
& RM_DONTCARE
))
971 /* This is a makefile we care about. See how much. */
972 if (d
->changed
& RM_INCLUDED
)
973 /* An included makefile. We don't need
974 to die, but we do want to complain. */
975 error ("Included makefile `%s' was not found.",
979 /* A normal makefile. We must die later. */
980 error ("Makefile `%s' was not found", dep_name (d
));
998 /* Updated successfully. Re-exec ourselves. */
1000 remove_intermediates (0);
1002 if (print_data_base_flag
)
1005 if (print_directory_flag
)
1006 log_working_directory (0);
1010 /* These names might have changed. */
1011 register unsigned int i
, j
= 0;
1012 for (i
= 1; i
< argc
; ++i
)
1013 if (!strcmp (argv
[i
], "-f")) /* XXX */
1015 char *p
= &argv
[i
][2];
1017 argv
[++i
] = makefiles
->list
[j
];
1019 argv
[i
] = concat ("-f", makefiles
->list
[j
], "");
1024 if (directories
!= 0 && directories
->idx
> 0)
1027 if (directory_before_chdir
!= 0)
1029 if (chdir (directory_before_chdir
) < 0)
1031 perror_with_name ("chdir", "");
1040 fatal ("Couldn't change back to original directory.");
1043 for (p
= environ
; *p
!= 0; ++p
)
1044 if (!strncmp (*p
, "MAKELEVEL=", 10))
1046 /* The SGI compiler apparently can't understand
1047 the concept of storing the result of a function
1048 in something other than a local variable. */
1050 sgi_loses
= (char *) alloca (40);
1052 sprintf (*p
, "MAKELEVEL=%u", makelevel
);
1059 fputs ("Re-executing:", stdout
);
1060 for (p
= argv
; *p
!= 0; ++p
)
1068 exec_command (argv
, environ
);
1073 /* Set up `MAKEFLAGS' again for the normal targets. */
1074 define_makeflags (1, 0);
1079 /* If there were no command-line goals, use the default. */
1082 if (default_goal_file
!= 0)
1084 goals
= (struct dep
*) xmalloc (sizeof (struct dep
));
1087 goals
->file
= default_goal_file
;
1095 /* Update the goals. */
1098 puts ("Updating goal targets....");
1100 switch (update_goal_chain (goals
, 0))
1103 /* Nothing happened. */
1105 /* Updated successfully. */
1109 /* Updating failed. */
1113 /* We are under -q and would run some commands. */
1122 if (read_makefiles
== 0)
1123 fatal ("No targets specified and no makefile found");
1125 fatal ("No targets");
1135 /* Parsing of arguments, decoding of switches. */
1137 static char options
[sizeof (switches
) / sizeof (switches
[0]) * 3];
1138 static struct option long_options
[(sizeof (switches
) / sizeof (switches
[0])) +
1139 (sizeof (long_option_aliases
) /
1140 sizeof (long_option_aliases
[0]))];
1142 /* Fill in the string and vector for getopt. */
1148 register unsigned int i
;
1150 if (options
[0] != '\0')
1155 for (i
= 0; switches
[i
].c
!= '\0'; ++i
)
1157 long_options
[i
].name
= (switches
[i
].long_name
== 0 ? "" :
1158 switches
[i
].long_name
);
1159 long_options
[i
].flag
= 0;
1160 long_options
[i
].val
= switches
[i
].c
;
1161 if (isalnum (switches
[i
].c
))
1162 *p
++ = switches
[i
].c
;
1163 switch (switches
[i
].type
)
1168 long_options
[i
].has_arg
= no_argument
;
1174 if (isalnum (switches
[i
].c
))
1176 if (switches
[i
].noarg_value
!= 0)
1178 if (isalnum (switches
[i
].c
))
1180 long_options
[i
].has_arg
= optional_argument
;
1183 long_options
[i
].has_arg
= required_argument
;
1188 for (c
= 0; c
< (sizeof (long_option_aliases
) /
1189 sizeof (long_option_aliases
[0]));
1191 long_options
[i
++] = long_option_aliases
[c
];
1192 long_options
[i
].name
= 0;
1195 /* Decode switches from ARGC and ARGV.
1196 They came from the environment if ENV is nonzero. */
1199 decode_switches (argc
, argv
, env
)
1205 register const struct command_switch
*cs
;
1206 register struct stringlist
*sl
;
1211 other_args
= (struct stringlist
*) xmalloc (sizeof (struct stringlist
));
1212 other_args
->max
= argc
+ 1;
1213 other_args
->list
= (char **) xmalloc ((argc
+ 1) * sizeof (char *));
1214 other_args
->idx
= 1;
1215 other_args
->list
[0] = argv
[0];
1218 /* getopt does most of the parsing for us.
1219 First, get its vectors set up. */
1223 /* Let getopt produce error messages for the command line,
1224 but not for options from the environment. */
1226 /* Reset getopt's state. */
1229 while ((c
= getopt_long (argc
, argv
,
1230 options
, long_options
, (int *) 0)) != EOF
)
1233 /* Bad option. We will print a usage message and die later.
1234 But continue to parse the other options so the user can
1235 see all he did wrong. */
1238 for (cs
= switches
; cs
->c
!= '\0'; ++cs
)
1241 /* Whether or not we will actually do anything with
1242 this switch. We test this individually inside the
1243 switch below rather than just once outside it, so that
1244 options which are to be ignored still consume args. */
1245 int doit
= !env
|| cs
->env
;
1258 *(int *) cs
->value_ptr
= cs
->type
== flag
;
1266 optarg
= cs
->noarg_value
;
1268 sl
= *(struct stringlist
**) cs
->value_ptr
;
1271 sl
= (struct stringlist
*)
1272 xmalloc (sizeof (struct stringlist
));
1275 sl
->list
= (char **) xmalloc (5 * sizeof (char *));
1276 *(struct stringlist
**) cs
->value_ptr
= sl
;
1278 else if (sl
->idx
== sl
->max
- 1)
1281 sl
->list
= (char **)
1282 xrealloc ((char *) sl
->list
,
1283 sl
->max
* sizeof (char *));
1285 sl
->list
[sl
->idx
++] = optarg
;
1286 sl
->list
[sl
->idx
] = 0;
1290 if (optarg
== 0 && argc
> optind
1291 && isdigit (argv
[optind
][0]))
1292 optarg
= argv
[optind
++];
1299 int i
= atoi (optarg
);
1303 error ("the `-%c' option requires a \
1304 positive integral argument",
1309 *(unsigned int *) cs
->value_ptr
= i
;
1312 *(unsigned int *) cs
->value_ptr
1313 = *(unsigned int *) cs
->noarg_value
;
1317 if (optarg
== 0 && optind
< argc
1318 && (isdigit (argv
[optind
][0]) || argv
[optind
][0] == '.'))
1319 optarg
= argv
[optind
++];
1322 *(double *) cs
->value_ptr
1323 = (optarg
!= 0 ? atof (optarg
)
1324 : *(double *) cs
->noarg_value
);
1329 /* We've found the switch. Stop looking. */
1336 /* Collect the remaining args in the `other_args' string list. */
1338 while (optind
< argc
)
1340 char *arg
= argv
[optind
++];
1341 if (arg
[0] != '-' || arg
[1] != '\0')
1342 other_args
->list
[other_args
->idx
++] = arg
;
1344 other_args
->list
[other_args
->idx
] = 0;
1347 if (!env
&& (bad
|| print_usage_flag
))
1349 /* Print a nice usage message. */
1351 if (print_version_flag
)
1354 fprintf (stderr
, "Usage: %s [options] [target] ...\n", program
);
1356 fputs ("Options:\n", stderr
);
1357 for (cs
= switches
; cs
->c
!= '\0'; ++cs
)
1359 char buf
[1024], shortarg
[50], longarg
[50], *p
;
1361 if (cs
->description
[0] == '-')
1364 switch (long_options
[cs
- switches
].has_arg
)
1367 shortarg
[0] = longarg
[0] = '\0';
1369 case required_argument
:
1370 sprintf (longarg
, "=%s", cs
->argdesc
);
1371 sprintf (shortarg
, " %s", cs
->argdesc
);
1373 case optional_argument
:
1374 sprintf (longarg
, "[=%s]", cs
->argdesc
);
1375 sprintf (shortarg
, " [%s]", cs
->argdesc
);
1381 if (isalnum (cs
->c
))
1383 sprintf (buf
, " -%c%s", cs
->c
, shortarg
);
1386 if (cs
->long_name
!= 0)
1389 sprintf (p
, "%s--%s%s",
1390 !isalnum (cs
->c
) ? " " : ", ",
1391 cs
->long_name
, longarg
);
1393 for (i
= 0; i
< (sizeof (long_option_aliases
) /
1394 sizeof (long_option_aliases
[0]));
1396 if (long_option_aliases
[i
].val
== cs
->c
)
1398 sprintf (p
, ", --%s%s",
1399 long_option_aliases
[i
].name
, longarg
);
1404 const struct command_switch
*ncs
= cs
;
1405 while ((++ncs
)->c
!= '\0')
1406 if (ncs
->description
[0] == '-' &&
1407 ncs
->description
[1] == cs
->c
)
1409 /* This is another switch that does the same
1410 one as the one we are processing. We want
1411 to list them all together on one line. */
1412 sprintf (p
, ", -%c%s", ncs
->c
, shortarg
);
1414 if (ncs
->long_name
!= 0)
1416 sprintf (p
, ", --%s%s", ncs
->long_name
, longarg
);
1422 if (p
- buf
> DESCRIPTION_COLUMN
- 2)
1423 /* The list of option names is too long to fit on the same
1424 line with the description, leaving at least two spaces.
1425 Print it on its own line instead. */
1427 fprintf (stderr
, "%s\n", buf
);
1431 fprintf (stderr
, "%*s%s.\n",
1432 - DESCRIPTION_COLUMN
,
1433 buf
, cs
->description
);
1440 /* Decode switches from environment variable ENVAR (which is LEN chars long).
1441 We do this by chopping the value into a vector of words, prepending a
1442 dash to the first word if it lacks one, and passing the vector to
1446 decode_env_switches (envar
, len
)
1450 char *varref
= (char *) alloca (2 + len
+ 2);
1455 /* Get the variable's value. */
1458 bcopy (envar
, &varref
[2], len
);
1459 varref
[2 + len
] = ')';
1460 varref
[2 + len
+ 1] = '\0';
1461 value
= variable_expand (varref
);
1463 /* Skip whitespace, and check for an empty value. */
1464 value
= next_token (value
);
1465 len
= strlen (value
);
1469 /* Make a copy of the value in ARGS, where we will munge it.
1470 If it does not begin with a dash, prepend one.
1471 We must allocate lasting storage for this (and we never free it) because
1472 decode_switches may save pointers into it for string-valued switches. */
1473 args
= (char *) xmalloc (1 + len
+ 2);
1474 if (value
[0] != '-')
1476 bcopy (value
, value
[0] == '-' ? args
: &args
[1], len
+ 1);
1477 /* Write an extra null terminator so our loop below will
1478 never be in danger of looking past the end of the string. */
1479 args
[(value
[0] == '-' ? 0 : 1) + len
+ 1] = '\0';
1481 /* Allocate a vector that is definitely big enough. */
1482 argv
= (char **) alloca ((1 + len
+ 1) * sizeof (char *));
1484 /* getopt will look at the arguments starting at ARGV[1].
1485 Prepend a spacer word. */
1490 argv
[argc
++] = args
;
1491 args
= end_of_token (args
);
1493 } while (*args
!= '\0');
1496 /* Parse those words. */
1497 decode_switches (argc
, argv
, 1);
1500 /* Define the MAKEFLAGS and MFLAGS variables to reflect the settings of the
1501 command switches. Include options with args if ALL is nonzero.
1502 Don't include options with the `no_makefile' flag set if MAKEFILE. */
1505 define_makeflags (all
, makefile
)
1508 register const struct command_switch
*cs
;
1512 /* We will construct a linked list of `struct flag's describing
1513 all the flags which need to go in MAKEFLAGS. Then, once we
1514 know how many there are and their lengths, we can put them all
1515 together in a string. */
1520 const struct command_switch
*cs
;
1522 unsigned int arglen
;
1524 struct flag
*flags
= 0;
1525 unsigned int flagslen
= 0;
1526 #define ADD_FLAG(ARG, LEN) \
1528 struct flag *new = (struct flag *) alloca (sizeof (struct flag)); \
1531 new->arglen = (LEN); \
1532 new->next = flags; \
1534 if (new->arg == 0) \
1535 ++flagslen; /* Just a single flag letter. */ \
1537 flagslen += 1 + 1 + 1 + 1 + new->arglen; /* " -x foo" */ \
1538 if (!isalnum (cs->c)) \
1539 /* This switch has no single-letter version, so we use the long. */ \
1540 flagslen += 2 + strlen (cs->long_name); \
1543 for (cs
= switches
; cs
->c
!= '\0'; ++cs
)
1544 if (cs
->toenv
&& (!makefile
|| !cs
->no_makefile
))
1555 if (!*(int *) cs
->value_ptr
== (cs
->type
== flag_off
)
1556 && (cs
->default_value
== 0
1557 || *(int *) cs
->value_ptr
!= *(int *) cs
->default_value
))
1564 if ((cs
->default_value
!= 0
1565 && (*(unsigned int *) cs
->value_ptr
1566 == *(unsigned int *) cs
->default_value
)))
1568 else if (cs
->noarg_value
!= 0
1569 && (*(unsigned int *) cs
->value_ptr
==
1570 *(unsigned int *) cs
->noarg_value
))
1571 ADD_FLAG ("", 0); /* Optional value omitted; see below. */
1572 else if (cs
->c
== 'j')
1573 /* Special case for `-j'. */
1577 char *buf
= (char *) alloca (30);
1578 sprintf (buf
, "%u", *(unsigned int *) cs
->value_ptr
);
1579 ADD_FLAG (buf
, strlen (buf
));
1587 if (cs
->default_value
!= 0
1588 && (*(double *) cs
->value_ptr
1589 == *(double *) cs
->default_value
))
1591 else if (cs
->noarg_value
!= 0
1592 && (*(double *) cs
->value_ptr
1593 == *(double *) cs
->noarg_value
))
1594 ADD_FLAG ("", 0); /* Optional value omitted; see below. */
1597 char *buf
= (char *) alloca (100);
1598 sprintf (buf
, "%g", *(double *) cs
->value_ptr
);
1599 ADD_FLAG (buf
, strlen (buf
));
1607 struct stringlist
*sl
= *(struct stringlist
**) cs
->value_ptr
;
1610 /* Add the elements in reverse order, because
1611 all the flags get reversed below; and the order
1612 matters for some switches (like -I). */
1613 register unsigned int i
= sl
->idx
;
1615 ADD_FLAG (sl
->list
[i
], strlen (sl
->list
[i
]));
1624 /* No flags. Use a string of two nulls so [1] works below. */
1628 /* Construct the value in FLAGSTRING.
1629 We allocate enough space for a preceding dash and trailing null. */
1631 flagstring
= (char *) alloca (1 + flagslen
+ 1);
1636 /* Add the flag letter or name to the string. */
1637 if (!isalnum (flags
->cs
->c
))
1640 strcpy (p
, flags
->cs
->long_name
);
1644 *p
++ = flags
->cs
->c
;
1645 if (flags
->arg
!= 0)
1647 /* A flag that takes an optional argument which in this case
1648 is omitted is specified by ARG being "" and ARGLEN being 0.
1649 We must distinguish because a following flag appended without
1650 an intervening " -" is considered the arg for the first. */
1651 if (flags
->arglen
> 0)
1653 /* Add its argument too. */
1654 *p
++ = !isalnum (flags
->cs
->c
) ? '=' : ' ';
1655 bcopy (flags
->arg
, p
, flags
->arglen
);
1658 /* Write a following space and dash, for the next flag. */
1662 else if (!isalnum (flags
->cs
->c
))
1664 /* Long options must each go in their own word,
1665 so we write the following space and dash. */
1669 flags
= flags
->next
;
1670 } while (flags
!= 0);
1673 /* Kill the final space and dash. */
1676 /* Terminate the string. */
1680 v
= define_variable ("MAKEFLAGS", 9,
1681 /* On Sun, the value of MFLAGS starts with a `-' but
1682 the value of MAKEFLAGS lacks the `-'.
1683 Be compatible with this unless FLAGSTRING starts
1684 with a long option `--foo', since removing the
1685 first dash would result in the bogus `-foo'. */
1686 flagstring
[1] == '-' ? flagstring
: &flagstring
[1],
1687 /* This used to use o_env, but that lost when a
1688 makefile defined MAKEFLAGS. Makefiles set
1689 MAKEFLAGS to add switches, but we still want
1690 to redefine its value with the full set of
1691 switches. Of course, an override or command
1692 definition will still take precedence. */
1695 /* The first time we are called, set MAKEFLAGS to always be exported.
1696 We should not do this again on the second call, because that is
1697 after reading makefiles which might have done `unexport MAKEFLAGS'. */
1698 v
->export
= v_export
;
1699 /* Since MFLAGS is not parsed for flags, there is no reason to
1700 override any makefile redefinition. */
1701 (void) define_variable ("MFLAGS", 6, flagstring
, o_env
, 0);
1704 /* Print version information. */
1709 static int printed_version
= 0;
1711 char *precede
= print_data_base_flag
? "# " : "";
1713 if (printed_version
)
1714 /* Do it only once. */
1717 printf ("%sGNU Make version %s", precede
, version_string
);
1718 if (remote_description
!= 0 && *remote_description
!= '\0')
1719 printf ("-%s", remote_description
);
1721 printf (", by Richard Stallman and Roland McGrath.\n\
1722 %sCopyright (C) 1988, 89, 90, 91, 92, 93, 94 Free Software Foundation, Inc.\n\
1723 %sThis is free software; see the source for copying conditions.\n\
1724 %sThere is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A\n\
1725 %sPARTICULAR PURPOSE.\n\n", precede
, precede
, precede
, precede
);
1727 printed_version
= 1;
1729 /* Flush stdout so the user doesn't have to wait to see the
1730 version information while things are thought about. */
1734 /* Print a bunch of information about this and that. */
1739 extern char *ctime ();
1742 when
= time ((time_t *) 0);
1743 printf ("\n# Make data base, printed on %s", ctime (&when
));
1745 print_variable_data_base ();
1746 print_dir_data_base ();
1747 print_rule_data_base ();
1748 print_file_data_base ();
1749 print_vpath_data_base ();
1751 when
= time ((time_t *) 0);
1752 printf ("\n# Finished Make data base on %s\n", ctime (&when
));
1755 /* Exit with STATUS, cleaning up as necessary. */
1761 static char dying
= 0;
1769 /* Try to move back to the original directory. This is essential on
1770 MS-DOS (where there is really only one process), and on Unix it
1771 puts core files in the original directory instead of the -C
1773 if (directory_before_chdir
!= 0)
1774 chdir (directory_before_chdir
);
1776 if (print_version_flag
)
1779 /* Wait for children to die. */
1780 for (err
= status
!= 0; job_slots_used
> 0; err
= 0)
1781 reap_children (1, err
);
1783 /* Remove the intermediate files. */
1784 remove_intermediates (0);
1786 if (print_data_base_flag
)
1789 if (print_directory_flag
)
1790 log_working_directory (0);
1796 /* Write a message indicating that we've just entered or
1797 left (according to ENTERING) the current directory. */
1800 log_working_directory (entering
)
1803 static int entered
= 0;
1804 char *message
= entering
? "Entering" : "Leaving";
1809 /* Don't print the leaving message if we
1810 haven't printed the entering message. */
1813 if (print_data_base_flag
)
1814 fputs ("# ", stdout
);
1817 printf ("%s: %s ", program
, message
);
1819 printf ("%s[%u]: %s ", program
, makelevel
, message
);
1821 if (starting_directory
== 0)
1822 puts ("an unknown directory");
1824 printf ("directory `%s'\n", starting_directory
);