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 ();
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 { 1, 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 { 2, 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
)));
401 main (argc
, argv
, envp
)
406 extern void init_dir ();
407 extern RETSIGTYPE
fatal_error_signal (), child_handler ();
408 register struct file
*f
;
409 register unsigned int i
;
411 struct dep
*read_makefiles
;
412 PATH_VAR (current_directory
);
414 default_goal_file
= 0;
415 reading_filename
= 0;
416 reading_lineno_ptr
= 0;
418 #ifndef HAVE_SYS_SIGLIST
423 sigemptyset (&fatal_signal_set
);
424 #define ADD_SIG(sig) sigaddset (&fatal_signal_set, sig)
426 #ifdef HAVE_SIGSETMASK
427 fatal_signal_mask
= 0;
428 #define ADD_SIG(sig) fatal_signal_mask |= sigmask (sig)
434 #define FATAL_SIG(sig) \
435 if (signal ((sig), fatal_error_signal) == SIG_IGN) \
436 (void) signal ((sig), SIG_IGN); \
446 FATAL_SIG (SIGDANGER
);
457 /* Make sure stdout is line-buffered. */
459 #ifdef HAVE_SETLINEBUF
462 #ifndef SETVBUF_REVERSED
463 setvbuf (stdout
, (char *) 0, _IOLBF
, BUFSIZ
);
464 #else /* setvbuf not reversed. */
465 /* Some buggy systems lose if we pass 0 instead of allocating ourselves. */
466 setvbuf (stdout
, _IOLBF
, xmalloc (BUFSIZ
), BUFSIZ
);
467 #endif /* setvbuf reversed. */
468 #endif /* setlinebuf missing. */
470 /* Initialize the directory hashing code. */
473 /* Figure out where this program lives. */
477 if (argv
[0][0] == '\0')
481 program
= rindex (argv
[0], '/');
484 program
= rindex (argv
[0], '\\');
486 program
= rindex (argv
[0], ':');
494 /* Set up to access user data (files). */
497 /* Figure out where we are. */
499 if (getcwd (current_directory
, GET_PATH_MAX
) == 0)
502 perror_with_name ("getcwd: ", "");
504 error ("getwd: %s", current_directory
);
506 current_directory
[0] = '\0';
507 directory_before_chdir
= 0;
510 directory_before_chdir
= savestring (current_directory
,
511 strlen (current_directory
));
513 /* Read in variables from the environment. It is important that this be
514 done before $(MAKE) is are figured out so its definitions will not be
515 one from the environment. */
517 for (i
= 0; envp
[i
] != 0; ++i
)
519 register char *ep
= envp
[i
];
522 /* The result of pointer arithmetic is cast to unsigned int for
523 machines where ptrdiff_t is a different size that doesn't widen
525 define_variable (envp
[i
], (unsigned int) (ep
- envp
[i
]),
527 /* Force exportation of every variable culled from the environment.
528 We used to rely on target_environment's v_default code to do this.
529 But that does not work for the case where an environment variable
530 is redefined in a makefile with `override'; it should then still
531 be exported, because it was originally in the environment. */
535 /* Decode the switches. */
537 decode_env_switches ("MAKEFLAGS", 9);
539 /* People write things like:
540 MFLAGS="CC=gcc -pipe" "CFLAGS=-g"
541 and we set the -p, -i and -e switches. Doesn't seem quite right. */
542 decode_env_switches ("MFLAGS", 6);
544 decode_switches (argc
, argv
, 0);
546 /* Print version information. */
548 if (print_version_flag
|| print_data_base_flag
|| debug_flag
)
551 /* `make --version' is supposed to just print the version and exit. */
552 if (print_version_flag
)
556 /* Set the "MAKE_COMMAND" variable to the name we were invoked with.
557 (If it is a relative pathname with a slash, prepend our directory name
558 so the result will run the same program regardless of the current dir.
559 If it is a name with no slash, we can only hope that PATH did not
560 find it in the current directory.) */
562 if (current_directory
[0] != '\0'
563 && argv
[0] != 0 && argv
[0][0] != '/' && index (argv
[0], '/') != 0)
564 argv
[0] = concat (current_directory
, "/", argv
[0]);
567 /* The extra indirection through $(MAKE_COMMAND) is done
568 for hysterical raisins. */
569 (void) define_variable ("MAKE_COMMAND", 12, argv
[0], o_default
, 0);
570 (void) define_variable ("MAKE", 4, "$(MAKE_COMMAND)", o_default
, 1);
572 if (command_variables
!= 0)
574 struct command_variable
*cv
;
576 unsigned int len
= 0;
579 /* Figure out how much space will be taken up by the command-line
580 variable definitions. */
581 for (cv
= command_variables
; cv
!= 0; cv
= cv
->next
)
584 len
+= 2 * strlen (v
->name
);
588 len
+= 2 * strlen (v
->value
);
591 /* Now allocate a buffer big enough and fill it. */
592 p
= value
= alloca (len
);
593 for (cv
= command_variables
; cv
!= 0; cv
= cv
->next
)
596 p
= quote_as_word (p
, v
->name
, 0);
600 p
= quote_as_word (p
, v
->value
, 0);
603 p
[-1] = '\0'; /* Kill the final space and terminate. */
605 /* Define an unchangeable variable with a name that no POSIX.2
606 makefile could validly use for its own variable. */
607 (void) define_variable ("-*-command-variables-*-", 23,
608 value
, o_automatic
, 0);
610 /* Define the variable; this will not override any user definition.
611 Normally a reference to this variable is written into the value of
612 MAKEFLAGS, allowing the user to override this value to affect the
613 exported value of MAKEFLAGS. In POSIX-pedantic mode, we cannot
614 allow the user's setting of MAKEOVERRIDES to affect MAKEFLAGS, so
615 a reference to this hidden variable is written instead. */
616 (void) define_variable ("MAKEOVERRIDES", 13,
617 "${-*-command-variables-*-}", o_env
, 1);
620 /* If there were -C flags, move ourselves about. */
621 if (directories
!= 0)
622 for (i
= 0; directories
->list
[i
] != 0; ++i
)
624 char *dir
= directories
->list
[i
];
627 char *expanded
= tilde_expand (dir
);
632 pfatal_with_name (dir
);
633 if (dir
!= directories
->list
[i
])
637 /* Figure out the level of recursion. */
639 struct variable
*v
= lookup_variable ("MAKELEVEL", 9);
640 if (v
!= 0 && *v
->value
!= '\0' && *v
->value
!= '-')
641 makelevel
= (unsigned int) atoi (v
->value
);
646 /* Except under -s, always do -w in sub-makes and under -C. */
647 if (!silent_flag
&& (directories
!= 0 || makelevel
> 0))
648 print_directory_flag
= 1;
650 /* Let the user disable that with --no-print-directory. */
651 if (inhibit_print_directory_flag
)
652 print_directory_flag
= 0;
654 /* Construct the list of include directories to search. */
656 construct_include_path (include_directories
== 0 ? (char **) 0
657 : include_directories
->list
);
659 /* Figure out where we are now, after chdir'ing. */
660 if (directories
== 0)
661 /* We didn't move, so we're still in the same place. */
662 starting_directory
= current_directory
;
665 if (getcwd (current_directory
, GET_PATH_MAX
) == 0)
668 perror_with_name ("getcwd: ", "");
670 error ("getwd: %s", current_directory
);
672 starting_directory
= 0;
675 starting_directory
= current_directory
;
678 /* Tell the user where he is. */
680 if (print_directory_flag
)
681 log_working_directory (1);
683 /* Read any stdin makefiles into temporary files. */
687 register unsigned int i
;
688 for (i
= 0; i
< makefiles
->idx
; ++i
)
689 if (makefiles
->list
[i
][0] == '-' && makefiles
->list
[i
][1] == '\0')
691 /* This makefile is standard input. Since we may re-exec
692 and thus re-read the makefiles, we read standard input
693 into a temporary file and read from that. */
694 static char name
[] = "/tmp/GmXXXXXX";
697 /* Make a unique filename. */
698 (void) mktemp (name
);
700 outfile
= fopen (name
, "w");
702 pfatal_with_name ("fopen (temporary file)");
703 while (!feof (stdin
))
706 int n
= fread (buf
, 1, sizeof(buf
), stdin
);
707 if (n
> 0 && fwrite (buf
, 1, n
, outfile
) != n
)
708 pfatal_with_name ("fwrite (temporary file)");
710 /* Try to make sure we won't remake the temporary
711 file when we are re-exec'd. Kludge-o-matic! */
712 fprintf (outfile
, "%s:;\n", name
);
713 (void) fclose (outfile
);
715 /* Replace the name that read_all_makefiles will
716 see with the name of the temporary file. */
719 /* SGI compiler requires alloca's result be assigned simply. */
720 temp
= (char *) alloca (sizeof (name
));
721 bcopy (name
, temp
, sizeof (name
));
722 makefiles
->list
[i
] = temp
;
725 /* Make sure the temporary file will not be remade. */
726 f
= enter_file (savestring (name
, sizeof name
- 1));
728 f
->update_status
= 0;
729 f
->command_state
= cs_finished
;
730 /* Let it be removed when we're done. */
732 /* But don't mention it. */
737 /* Set up to handle children dying. This must be done before
738 reading in the makefiles so that `shell' function calls will work. */
741 (void) signal (SIGCHLD
, child_handler
);
744 (void) signal (SIGCLD
, child_handler
);
747 /* Define the initial list of suffixes for old-style rules. */
749 set_default_suffixes ();
751 /* Define the file rules for the built-in suffix rules. These will later
752 be converted into pattern rules. We used to do this in
753 install_default_implicit_rules, but since that happens after reading
754 makefiles, it results in the built-in pattern rules taking precedence
755 over makefile-specified suffix rules, which is wrong. */
757 install_default_suffix_rules ();
759 /* Define some internal and special variables. */
761 define_automatic_variables ();
763 /* Set up the MAKEFLAGS and MFLAGS variables
764 so makefiles can look at them. */
766 define_makeflags (0, 0);
768 /* Define the default variables. */
769 define_default_variables ();
771 /* Read all the makefiles. */
773 default_file
= enter_file (".DEFAULT");
776 = read_all_makefiles (makefiles
== 0 ? (char **) 0 : makefiles
->list
);
778 /* Decode switches again, in case the variables were set by the makefile. */
779 decode_env_switches ("MAKEFLAGS", 9);
781 decode_env_switches ("MFLAGS", 6);
784 /* Set up MAKEFLAGS and MFLAGS again, so they will be right. */
786 define_makeflags (1, 0);
788 f
= lookup_file (".IGNORE");
789 ignore_errors_flag
|= f
!= 0 && f
->is_target
;
791 f
= lookup_file (".SILENT");
792 silent_flag
|= f
!= 0 && f
->is_target
;
794 f
= lookup_file (".POSIX");
795 posix_pedantic
= f
!= 0 && f
->is_target
;
797 /* Make each `struct dep' point at the
798 `struct file' for the file depended on. */
802 /* Convert old-style suffix rules to pattern rules. It is important to
803 do this before installing the built-in pattern rules below, so that
804 makefile-specified suffix rules take precedence over built-in pattern
807 convert_to_pattern ();
809 /* Install the default implicit pattern rules.
810 This used to be done before reading the makefiles.
811 But in that case, built-in pattern rules were in the chain
812 before user-defined ones, so they matched first. */
814 install_default_implicit_rules ();
816 /* Compute implicit rule limits. */
818 count_implicit_rule_limits ();
820 /* Construct the listings of directories in VPATH lists. */
822 build_vpath_lists ();
824 /* Mark files given with -o flags as very old (00:00:01.00 Jan 1, 1970)
825 and as having been updated already, and files given with -W flags as
826 brand new (time-stamp as far as possible into the future). */
829 for (p
= old_files
->list
; *p
!= 0; ++p
)
831 f
= enter_command_line_file (*p
);
832 f
->last_mtime
= (time_t) 1;
834 f
->update_status
= 0;
835 f
->command_state
= cs_finished
;
840 for (p
= new_files
->list
; *p
!= 0; ++p
)
842 f
= enter_command_line_file (*p
);
843 f
->last_mtime
= NEW_MTIME
;
847 if (read_makefiles
!= 0)
849 /* Update any makefiles if necessary. */
851 time_t *makefile_mtimes
= 0;
852 unsigned int mm_idx
= 0;
855 puts ("Updating makefiles....");
857 /* Remove any makefiles we don't want to try to update.
858 Also record the current modtimes so we can compare them later. */
860 register struct dep
*d
, *last
;
865 register struct file
*f
= d
->file
;
867 for (f
= f
->double_colon
; f
!= NULL
; f
= f
->prev
)
869 if (f
->deps
== 0 && f
->cmds
!= 0)
871 /* This makefile is a :: target with commands, but
872 no dependencies. So, it will always be remade.
873 This might well cause an infinite loop, so don't
874 try to remake it. (This will only happen if
875 your makefiles are written exceptionally
876 stupidly; but if you work for Athena, that's how
877 you write your makefiles.) */
880 printf ("Makefile `%s' might loop; not remaking it.\n",
884 read_makefiles
= d
->next
;
886 last
->next
= d
->next
;
888 /* Free the storage. */
891 d
= last
== 0 ? 0 : last
->next
;
896 if (f
== NULL
|| !f
->double_colon
)
898 if (makefile_mtimes
== 0)
899 makefile_mtimes
= (time_t *) xmalloc (sizeof (time_t));
901 makefile_mtimes
= (time_t *)
902 xrealloc ((char *) makefile_mtimes
,
903 (mm_idx
+ 1) * sizeof (time_t));
904 makefile_mtimes
[mm_idx
++] = file_mtime_no_search (d
->file
);
911 /* Set up `MAKEFLAGS' specially while remaking makefiles. */
912 define_makeflags (1, 1);
914 switch (update_goal_chain (read_makefiles
, 1))
924 /* Failed to update. Figure out if we care. */
926 /* Nonzero if any makefile was successfully remade. */
928 /* Nonzero if any makefile we care about failed
929 in updating or could not be found at all. */
931 register unsigned int i
;
933 for (i
= 0; read_makefiles
!= 0; ++i
)
935 struct dep
*d
= read_makefiles
;
936 read_makefiles
= d
->next
;
937 if (d
->file
->updated
)
939 /* This makefile was updated. */
940 if (d
->file
->update_status
== 0)
942 /* It was successfully updated. */
943 any_remade
|= (file_mtime_no_search (d
->file
)
944 != makefile_mtimes
[i
]);
946 else if (! (d
->changed
& RM_DONTCARE
))
949 /* The update failed and this makefile was not
950 from the MAKEFILES variable, so we care. */
951 error ("Failed to remake makefile `%s'.",
953 mtime
= file_mtime_no_search (d
->file
);
954 any_remade
|= (mtime
!= (time_t) -1
955 && mtime
!= makefile_mtimes
[i
]);
959 /* This makefile was not found at all. */
960 if (! (d
->changed
& RM_DONTCARE
))
962 /* This is a makefile we care about. See how much. */
963 if (d
->changed
& RM_INCLUDED
)
964 /* An included makefile. We don't need
965 to die, but we do want to complain. */
966 error ("Included makefile `%s' was not found.",
970 /* A normal makefile. We must die later. */
971 error ("Makefile `%s' was not found", dep_name (d
));
989 /* Updated successfully. Re-exec ourselves. */
991 remove_intermediates (0);
993 if (print_data_base_flag
)
996 if (print_directory_flag
)
997 log_working_directory (0);
1001 /* These names might have changed. */
1002 register unsigned int i
, j
= 0;
1003 for (i
= 1; i
< argc
; ++i
)
1004 if (!strcmp (argv
[i
], "-f")) /* XXX */
1006 char *p
= &argv
[i
][2];
1008 argv
[++i
] = makefiles
->list
[j
];
1010 argv
[i
] = concat ("-f", makefiles
->list
[j
], "");
1015 if (directories
!= 0 && directories
->idx
> 0)
1018 if (directory_before_chdir
!= 0)
1020 if (chdir (directory_before_chdir
) < 0)
1022 perror_with_name ("chdir", "");
1031 fatal ("Couldn't change back to original directory.");
1034 for (p
= environ
; *p
!= 0; ++p
)
1035 if (!strncmp (*p
, "MAKELEVEL=", 10))
1037 /* The SGI compiler apparently can't understand
1038 the concept of storing the result of a function
1039 in something other than a local variable. */
1041 sgi_loses
= (char *) alloca (40);
1043 sprintf (*p
, "MAKELEVEL=%u", makelevel
);
1050 fputs ("Re-executing:", stdout
);
1051 for (p
= argv
; *p
!= 0; ++p
)
1059 exec_command (argv
, environ
);
1064 /* Set up `MAKEFLAGS' again for the normal targets. */
1065 define_makeflags (1, 0);
1070 /* If there were no command-line goals, use the default. */
1073 if (default_goal_file
!= 0)
1075 goals
= (struct dep
*) xmalloc (sizeof (struct dep
));
1078 goals
->file
= default_goal_file
;
1086 /* Update the goals. */
1089 puts ("Updating goal targets....");
1091 switch (update_goal_chain (goals
, 0))
1094 /* Nothing happened. */
1096 /* Updated successfully. */
1100 /* Updating failed. */
1104 /* We are under -q and would run some commands. */
1113 if (read_makefiles
== 0)
1114 fatal ("No targets specified and no makefile found");
1116 fatal ("No targets");
1126 /* Parsing of arguments, decoding of switches. */
1128 static char options
[1 + sizeof (switches
) / sizeof (switches
[0]) * 3];
1129 static struct option long_options
[(sizeof (switches
) / sizeof (switches
[0])) +
1130 (sizeof (long_option_aliases
) /
1131 sizeof (long_option_aliases
[0]))];
1133 /* Fill in the string and vector for getopt. */
1139 register unsigned int i
;
1141 if (options
[0] != '\0')
1147 /* Return switch and non-switch args in order, regardless of
1148 POSIXLY_CORRECT. Non-switch args are returned as option 1. */
1151 for (i
= 0; switches
[i
].c
!= '\0'; ++i
)
1153 long_options
[i
].name
= (switches
[i
].long_name
== 0 ? "" :
1154 switches
[i
].long_name
);
1155 long_options
[i
].flag
= 0;
1156 long_options
[i
].val
= switches
[i
].c
;
1157 if (isalnum (switches
[i
].c
))
1158 *p
++ = switches
[i
].c
;
1159 switch (switches
[i
].type
)
1164 long_options
[i
].has_arg
= no_argument
;
1170 if (isalnum (switches
[i
].c
))
1172 if (switches
[i
].noarg_value
!= 0)
1174 if (isalnum (switches
[i
].c
))
1176 long_options
[i
].has_arg
= optional_argument
;
1179 long_options
[i
].has_arg
= required_argument
;
1184 for (c
= 0; c
< (sizeof (long_option_aliases
) /
1185 sizeof (long_option_aliases
[0]));
1187 long_options
[i
++] = long_option_aliases
[c
];
1188 long_options
[i
].name
= 0;
1191 /* Decode switches from ARGC and ARGV.
1192 They came from the environment if ENV is nonzero. */
1195 decode_switches (argc
, argv
, env
)
1201 register const struct command_switch
*cs
;
1202 register struct stringlist
*sl
;
1205 /* getopt does most of the parsing for us.
1206 First, get its vectors set up. */
1210 /* Let getopt produce error messages for the command line,
1211 but not for options from the environment. */
1213 /* Reset getopt's state. */
1217 while (optind
< argc
)
1221 /* There are no more options according to getting getopt, but
1222 there are some arguments left. Since we have asked for
1223 non-option arguments to be returned in order, I think this
1224 only happens when there is a "--" argument to prevent later
1225 argument from being options. Since getopt has finished its
1226 job, just update its state variables for the next argument and
1227 set C as if it had returned 1, indicating a non-option
1229 optarg
= argv
[optind
++];
1233 /* Parse the next argument. */
1234 c
= getopt_long (argc
, argv
, options
, long_options
, (int *) 0);
1238 /* Non-option argument. It might be a variable definition. */
1240 v
= try_variable_definition ((char *) 0, 0, optarg
, o_command
);
1243 /* It is indeed a variable definition. Record a pointer to
1244 the variable for later use in define_makeflags. */
1245 struct command_variable
*cv
1246 = (struct command_variable
*) xmalloc (sizeof (*cv
));
1248 cv
->next
= command_variables
;
1249 command_variables
= cv
;
1253 /* Not an option or variable definition; it must be a goal
1254 target! Enter it as a file and add it to the dep chain of
1256 struct file
*f
= enter_command_line_file (optarg
);
1261 goals
= (struct dep
*) xmalloc (sizeof (struct dep
));
1267 = (struct dep
*) xmalloc (sizeof (struct dep
));
1268 lastgoal
= lastgoal
->next
;
1275 /* Bad option. We will print a usage message and die later.
1276 But continue to parse the other options so the user can
1277 see all he did wrong. */
1280 for (cs
= switches
; cs
->c
!= '\0'; ++cs
)
1283 /* Whether or not we will actually do anything with
1284 this switch. We test this individually inside the
1285 switch below rather than just once outside it, so that
1286 options which are to be ignored still consume args. */
1287 int doit
= !env
|| cs
->env
;
1300 *(int *) cs
->value_ptr
= cs
->type
== flag
;
1308 optarg
= cs
->noarg_value
;
1310 sl
= *(struct stringlist
**) cs
->value_ptr
;
1313 sl
= (struct stringlist
*)
1314 xmalloc (sizeof (struct stringlist
));
1317 sl
->list
= (char **) xmalloc (5 * sizeof (char *));
1318 *(struct stringlist
**) cs
->value_ptr
= sl
;
1320 else if (sl
->idx
== sl
->max
- 1)
1323 sl
->list
= (char **)
1324 xrealloc ((char *) sl
->list
,
1325 sl
->max
* sizeof (char *));
1327 sl
->list
[sl
->idx
++] = optarg
;
1328 sl
->list
[sl
->idx
] = 0;
1332 if (optarg
== 0 && argc
> optind
1333 && isdigit (argv
[optind
][0]))
1334 optarg
= argv
[optind
++];
1341 int i
= atoi (optarg
);
1345 error ("the `-%c' option requires a \
1346 positive integral argument",
1351 *(unsigned int *) cs
->value_ptr
= i
;
1354 *(unsigned int *) cs
->value_ptr
1355 = *(unsigned int *) cs
->noarg_value
;
1359 if (optarg
== 0 && optind
< argc
1360 && (isdigit (argv
[optind
][0]) || argv
[optind
][0] == '.'))
1361 optarg
= argv
[optind
++];
1364 *(double *) cs
->value_ptr
1365 = (optarg
!= 0 ? atof (optarg
)
1366 : *(double *) cs
->noarg_value
);
1371 /* We've found the switch. Stop looking. */
1376 if (!env
&& (bad
|| print_usage_flag
))
1378 /* Print a nice usage message. */
1380 if (print_version_flag
)
1383 fprintf (stderr
, "Usage: %s [options] [target] ...\n", program
);
1385 fputs ("Options:\n", stderr
);
1386 for (cs
= switches
; cs
->c
!= '\0'; ++cs
)
1388 char buf
[1024], shortarg
[50], longarg
[50], *p
;
1390 if (cs
->description
[0] == '-')
1393 switch (long_options
[cs
- switches
].has_arg
)
1396 shortarg
[0] = longarg
[0] = '\0';
1398 case required_argument
:
1399 sprintf (longarg
, "=%s", cs
->argdesc
);
1400 sprintf (shortarg
, " %s", cs
->argdesc
);
1402 case optional_argument
:
1403 sprintf (longarg
, "[=%s]", cs
->argdesc
);
1404 sprintf (shortarg
, " [%s]", cs
->argdesc
);
1410 if (isalnum (cs
->c
))
1412 sprintf (buf
, " -%c%s", cs
->c
, shortarg
);
1415 if (cs
->long_name
!= 0)
1418 sprintf (p
, "%s--%s%s",
1419 !isalnum (cs
->c
) ? " " : ", ",
1420 cs
->long_name
, longarg
);
1422 for (i
= 0; i
< (sizeof (long_option_aliases
) /
1423 sizeof (long_option_aliases
[0]));
1425 if (long_option_aliases
[i
].val
== cs
->c
)
1427 sprintf (p
, ", --%s%s",
1428 long_option_aliases
[i
].name
, longarg
);
1433 const struct command_switch
*ncs
= cs
;
1434 while ((++ncs
)->c
!= '\0')
1435 if (ncs
->description
[0] == '-' &&
1436 ncs
->description
[1] == cs
->c
)
1438 /* This is another switch that does the same
1439 one as the one we are processing. We want
1440 to list them all together on one line. */
1441 sprintf (p
, ", -%c%s", ncs
->c
, shortarg
);
1443 if (ncs
->long_name
!= 0)
1445 sprintf (p
, ", --%s%s", ncs
->long_name
, longarg
);
1451 if (p
- buf
> DESCRIPTION_COLUMN
- 2)
1452 /* The list of option names is too long to fit on the same
1453 line with the description, leaving at least two spaces.
1454 Print it on its own line instead. */
1456 fprintf (stderr
, "%s\n", buf
);
1460 fprintf (stderr
, "%*s%s.\n",
1461 - DESCRIPTION_COLUMN
,
1462 buf
, cs
->description
);
1469 /* Decode switches from environment variable ENVAR (which is LEN chars long).
1470 We do this by chopping the value into a vector of words, prepending a
1471 dash to the first word if it lacks one, and passing the vector to
1475 decode_env_switches (envar
, len
)
1479 char *varref
= (char *) alloca (2 + len
+ 2);
1484 /* Get the variable's value. */
1487 bcopy (envar
, &varref
[2], len
);
1488 varref
[2 + len
] = ')';
1489 varref
[2 + len
+ 1] = '\0';
1490 value
= variable_expand (varref
);
1492 /* Skip whitespace, and check for an empty value. */
1493 value
= next_token (value
);
1494 len
= strlen (value
);
1498 /* Allocate a vector that is definitely big enough. */
1499 argv
= (char **) alloca ((1 + len
+ 1) * sizeof (char *));
1501 /* Allocate a buffer to copy the value into while we split it into words
1502 and unquote it. We must use permanent storage for this because
1503 decode_switches may store pointers into the passed argument words. */
1504 p
= (char *) xmalloc (2 * len
);
1506 /* getopt will look at the arguments starting at ARGV[1].
1507 Prepend a spacer word. */
1511 while (*value
!= '\0')
1514 ++value
; /* Skip the backslash. */
1515 else if (isblank (*value
))
1517 /* End of the word. */
1522 while (isblank (*value
));
1530 if (argc
== 2 && argv
[1][0] != '-')
1532 /* There is just one word in the value, and it is not a switch.
1533 Either this is the single-word form and we should prepend a dash
1534 before calling decode_switches, or this is the multi-word form and
1535 there is no dash because it is a variable definition. */
1537 v
= try_variable_definition ((char *) 0, 0, argv
[1], o_command
);
1540 /* It was indeed a variable definition, and now it has been
1541 processed. There is nothing for decode_switches to do.
1542 Record a pointer to the variable for later use in
1543 define_makeflags. */
1544 struct command_variable
*cv
1545 = (struct command_variable
*) xmalloc (sizeof (*cv
));
1547 cv
->next
= command_variables
;
1548 command_variables
= cv
;
1552 /* It wasn't a variable definition, so it's some switches without a
1553 leading dash. Add one and pass it along to decode_switches. We
1554 need permanent storage for this in case decode_switches saves
1555 pointers into the value. */
1556 argv
[1] = concat ("-", argv
[1], "");
1559 /* Parse those words. */
1560 decode_switches (argc
, argv
, 1);
1563 /* Quote the string IN so that it will be interpreted as a single word with
1564 no magic by the shell; if DOUBLE_DOLLARS is nonzero, also double dollar
1565 signs to avoid variable expansion in make itself. Write the result into
1566 OUT, returning the address of the next character to be written.
1567 Allocating space for OUT twice the length of IN (thrice if
1568 DOUBLE_DOLLARS is nonzero) is always sufficient. */
1571 quote_as_word (out
, in
, double_dollars
)
1577 if (index ("^;'\"*?[]$<>(){}|&~`\\ \t\r\n\f\v", *in
) != 0)
1579 if (double_dollars
&& *in
== '$')
1587 /* Define the MAKEFLAGS and MFLAGS variables to reflect the settings of the
1588 command switches. Include options with args if ALL is nonzero.
1589 Don't include options with the `no_makefile' flag set if MAKEFILE. */
1592 define_makeflags (all
, makefile
)
1595 static const char ref
[] = "$(MAKEOVERRIDES)";
1596 static const char posixref
[] = "$(-*-command-variables-*-)";
1597 register const struct command_switch
*cs
;
1603 /* We will construct a linked list of `struct flag's describing
1604 all the flags which need to go in MAKEFLAGS. Then, once we
1605 know how many there are and their lengths, we can put them all
1606 together in a string. */
1611 const struct command_switch
*cs
;
1614 struct flag
*flags
= 0;
1615 unsigned int flagslen
= 0;
1616 #define ADD_FLAG(ARG, LEN) \
1618 struct flag *new = (struct flag *) alloca (sizeof (struct flag)); \
1621 new->next = flags; \
1623 if (new->arg == 0) \
1624 ++flagslen; /* Just a single flag letter. */ \
1626 flagslen += 1 + 1 + 1 + 1 + 3 * (LEN); /* " -x foo" */ \
1627 if (!isalnum (cs->c)) \
1628 /* This switch has no single-letter version, so we use the long. */ \
1629 flagslen += 2 + strlen (cs->long_name); \
1632 for (cs
= switches
; cs
->c
!= '\0'; ++cs
)
1633 if (cs
->toenv
&& (!makefile
|| !cs
->no_makefile
))
1644 if (!*(int *) cs
->value_ptr
== (cs
->type
== flag_off
)
1645 && (cs
->default_value
== 0
1646 || *(int *) cs
->value_ptr
!= *(int *) cs
->default_value
))
1653 if ((cs
->default_value
!= 0
1654 && (*(unsigned int *) cs
->value_ptr
1655 == *(unsigned int *) cs
->default_value
)))
1657 else if (cs
->noarg_value
!= 0
1658 && (*(unsigned int *) cs
->value_ptr
==
1659 *(unsigned int *) cs
->noarg_value
))
1660 ADD_FLAG ("", 0); /* Optional value omitted; see below. */
1661 else if (cs
->c
== 'j')
1662 /* Special case for `-j'. */
1666 char *buf
= (char *) alloca (30);
1667 sprintf (buf
, "%u", *(unsigned int *) cs
->value_ptr
);
1668 ADD_FLAG (buf
, strlen (buf
));
1676 if (cs
->default_value
!= 0
1677 && (*(double *) cs
->value_ptr
1678 == *(double *) cs
->default_value
))
1680 else if (cs
->noarg_value
!= 0
1681 && (*(double *) cs
->value_ptr
1682 == *(double *) cs
->noarg_value
))
1683 ADD_FLAG ("", 0); /* Optional value omitted; see below. */
1686 char *buf
= (char *) alloca (100);
1687 sprintf (buf
, "%g", *(double *) cs
->value_ptr
);
1688 ADD_FLAG (buf
, strlen (buf
));
1696 struct stringlist
*sl
= *(struct stringlist
**) cs
->value_ptr
;
1699 /* Add the elements in reverse order, because
1700 all the flags get reversed below; and the order
1701 matters for some switches (like -I). */
1702 register unsigned int i
= sl
->idx
;
1704 ADD_FLAG (sl
->list
[i
], strlen (sl
->list
[i
]));
1710 flagslen
+= 4 + sizeof posixref
; /* Four more for the possible " -- ". */
1714 /* Construct the value in FLAGSTRING.
1715 We allocate enough space for a preceding dash and trailing null. */
1716 flagstring
= (char *) alloca (1 + flagslen
+ 1);
1722 /* Add the flag letter or name to the string. */
1723 if (!isalnum (flags
->cs
->c
))
1726 strcpy (p
, flags
->cs
->long_name
);
1730 *p
++ = flags
->cs
->c
;
1731 if (flags
->arg
!= 0)
1733 /* A flag that takes an optional argument which in this case is
1734 omitted is specified by ARG being "". We must distinguish
1735 because a following flag appended without an intervening " -"
1736 is considered the arg for the first. */
1737 if (flags
->arg
[0] != '\0')
1739 /* Add its argument too. */
1740 *p
++ = !isalnum (flags
->cs
->c
) ? '=' : ' ';
1741 p
= quote_as_word (p
, flags
->arg
, 1);
1744 /* Write a following space and dash, for the next flag. */
1748 else if (!isalnum (flags
->cs
->c
))
1751 /* Long options must each go in their own word,
1752 so we write the following space and dash. */
1756 flags
= flags
->next
;
1759 if (all
&& command_variables
!= 0)
1761 /* Now write a reference to $(MAKEOVERRIDES), which contains all the
1762 command-line variable definitions. */
1764 if (p
== &flagstring
[1])
1765 /* No flags written, so elide the leading dash already written. */
1769 /* Separate the variables from the switches with a "--" arg. */
1772 /* We did not already write a trailing " -". */
1776 /* There is a trailing " -"; fill it out to " -- ". */
1781 /* Copy in the string. */
1784 bcopy (posixref
, p
, sizeof posixref
- 1);
1785 p
+= sizeof posixref
- 1;
1789 bcopy (ref
, p
, sizeof ref
- 1);
1790 p
+= sizeof ref
- 1;
1793 else if (p
[-1] == '-')
1794 /* Kill the final space and dash. */
1796 /* Terminate the string. */
1799 v
= define_variable ("MAKEFLAGS", 9,
1800 /* If there is just a single word of switches,
1801 omit the leading dash unless it is a single
1802 long option with two leading dashes. */
1803 &flagstring
[(words
== 1 && command_variables
== 0
1804 && flagstring
[1] != '-')
1806 /* This used to use o_env, but that lost when a
1807 makefile defined MAKEFLAGS. Makefiles set
1808 MAKEFLAGS to add switches, but we still want
1809 to redefine its value with the full set of
1810 switches. Of course, an override or command
1811 definition will still take precedence. */
1814 /* The first time we are called, set MAKEFLAGS to always be exported.
1815 We should not do this again on the second call, because that is
1816 after reading makefiles which might have done `unexport MAKEFLAGS'. */
1817 v
->export
= v_export
;
1818 /* Since MFLAGS is not parsed for flags, there is no reason to
1819 override any makefile redefinition. */
1820 (void) define_variable ("MFLAGS", 6, flagstring
, o_env
, 1);
1823 /* Print version information. */
1828 static int printed_version
= 0;
1830 char *precede
= print_data_base_flag
? "# " : "";
1832 if (printed_version
)
1833 /* Do it only once. */
1836 printf ("%sGNU Make version %s", precede
, version_string
);
1837 if (remote_description
!= 0 && *remote_description
!= '\0')
1838 printf ("-%s", remote_description
);
1840 printf (", by Richard Stallman and Roland McGrath.\n\
1841 %sCopyright (C) 1988, 89, 90, 91, 92, 93, 94 Free Software Foundation, Inc.\n\
1842 %sThis is free software; see the source for copying conditions.\n\
1843 %sThere is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A\n\
1844 %sPARTICULAR PURPOSE.\n\n", precede
, precede
, precede
, precede
);
1846 printed_version
= 1;
1848 /* Flush stdout so the user doesn't have to wait to see the
1849 version information while things are thought about. */
1853 /* Print a bunch of information about this and that. */
1858 extern char *ctime ();
1861 when
= time ((time_t *) 0);
1862 printf ("\n# Make data base, printed on %s", ctime (&when
));
1864 print_variable_data_base ();
1865 print_dir_data_base ();
1866 print_rule_data_base ();
1867 print_file_data_base ();
1868 print_vpath_data_base ();
1870 when
= time ((time_t *) 0);
1871 printf ("\n# Finished Make data base on %s\n", ctime (&when
));
1874 /* Exit with STATUS, cleaning up as necessary. */
1880 static char dying
= 0;
1888 /* Try to move back to the original directory. This is essential on
1889 MS-DOS (where there is really only one process), and on Unix it
1890 puts core files in the original directory instead of the -C
1892 if (directory_before_chdir
!= 0)
1893 chdir (directory_before_chdir
);
1895 if (print_version_flag
)
1898 /* Wait for children to die. */
1899 for (err
= status
!= 0; job_slots_used
> 0; err
= 0)
1900 reap_children (1, err
);
1902 /* Remove the intermediate files. */
1903 remove_intermediates (0);
1905 if (print_data_base_flag
)
1908 if (print_directory_flag
)
1909 log_working_directory (0);
1915 /* Write a message indicating that we've just entered or
1916 left (according to ENTERING) the current directory. */
1919 log_working_directory (entering
)
1922 static int entered
= 0;
1923 char *message
= entering
? "Entering" : "Leaving";
1928 /* Don't print the leaving message if we
1929 haven't printed the entering message. */
1932 if (print_data_base_flag
)
1933 fputs ("# ", stdout
);
1936 printf ("%s: %s ", program
, message
);
1938 printf ("%s[%u]: %s ", program
, makelevel
, message
);
1940 if (starting_directory
== 0)
1941 puts ("an unknown directory");
1943 printf ("directory `%s'\n", starting_directory
);