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 goal targets. */
309 static struct dep
*goals
, *lastgoal
;
311 /* List of variables which were defined on the command line
312 (or, equivalently, in MAKEFLAGS). */
314 struct command_variable
316 struct command_variable
*next
;
317 struct variable
*variable
;
319 static struct command_variable
*command_variables
;
321 /* The name we were invoked with. */
325 /* Our current directory before processing any -C options. */
327 char *directory_before_chdir
;
329 /* Our current directory after processing all -C options. */
331 char *starting_directory
;
333 /* Value of the MAKELEVEL variable at startup (or 0). */
335 unsigned int makelevel
;
337 /* First file defined in the makefile whose name does not
338 start with `.'. This is the default to remake if the
339 command line does not specify. */
341 struct file
*default_goal_file
;
343 /* Pointer to structure for the file .DEFAULT
344 whose commands are used for any file that has none of its own.
345 This is zero if the makefiles do not define .DEFAULT. */
347 struct file
*default_file
;
349 /* Mask of signals that are being caught with fatal_error_signal. */
352 sigset_t fatal_signal_set
;
354 #ifdef HAVE_SIGSETMASK
355 int fatal_signal_mask
;
360 enter_command_line_file (name
)
365 char *expanded
= tilde_expand (name
);
367 name
= expanded
; /* Memory leak; I don't care. */
370 /* This is also done in parse_file_seq, so this is redundant
371 for names read from makefiles. It is here for names passed
372 on the command line. */
373 while (name
[0] == '.' && name
[1] == '/' && name
[2] != '\0')
377 /* Skip following slashes: ".//foo" is "foo", not "/foo". */
383 /* It was all slashes! Move back to the dot and truncate
384 it after the first slash, so it becomes just "./". */
387 while (name
[0] != '.');
391 return enter_file (savestring (name
, strlen (name
)));
395 main (argc
, argv
, envp
)
400 extern void init_dir ();
401 extern RETSIGTYPE
fatal_error_signal (), child_handler ();
402 register struct file
*f
;
403 register unsigned int i
;
405 struct dep
*read_makefiles
;
406 PATH_VAR (current_directory
);
408 default_goal_file
= 0;
409 reading_filename
= 0;
410 reading_lineno_ptr
= 0;
412 #ifndef HAVE_SYS_SIGLIST
417 sigemptyset (&fatal_signal_set
);
418 #define ADD_SIG(sig) sigaddset (&fatal_signal_set, sig)
420 #ifdef HAVE_SIGSETMASK
421 fatal_signal_mask
= 0;
422 #define ADD_SIG(sig) fatal_signal_mask |= sigmask (sig)
428 #define FATAL_SIG(sig) \
429 if (signal ((sig), fatal_error_signal) == SIG_IGN) \
430 (void) signal ((sig), SIG_IGN); \
440 FATAL_SIG (SIGDANGER
);
451 /* Make sure stdout is line-buffered. */
453 #ifdef HAVE_SETLINEBUF
456 #ifndef SETVBUF_REVERSED
457 setvbuf (stdout
, (char *) 0, _IOLBF
, BUFSIZ
);
458 #else /* setvbuf not reversed. */
459 /* Some buggy systems lose if we pass 0 instead of allocating ourselves. */
460 setvbuf (stdout
, _IOLBF
, xmalloc (BUFSIZ
), BUFSIZ
);
461 #endif /* setvbuf reversed. */
462 #endif /* setlinebuf missing. */
464 /* Initialize the directory hashing code. */
467 /* Figure out where this program lives. */
471 if (argv
[0][0] == '\0')
475 program
= rindex (argv
[0], '/');
478 program
= rindex (argv
[0], '\\');
480 program
= rindex (argv
[0], ':');
488 /* Set up to access user data (files). */
491 /* Figure out where we are. */
493 if (getcwd (current_directory
, GET_PATH_MAX
) == 0)
496 perror_with_name ("getcwd: ", "");
498 error ("getwd: %s", current_directory
);
500 current_directory
[0] = '\0';
501 directory_before_chdir
= 0;
504 directory_before_chdir
= savestring (current_directory
,
505 strlen (current_directory
));
507 /* Read in variables from the environment. It is important that this be
508 done before $(MAKE) is are figured out so its definitions will not be
509 one from the environment. */
511 for (i
= 0; envp
[i
] != 0; ++i
)
513 register char *ep
= envp
[i
];
516 /* The result of pointer arithmetic is cast to unsigned int for
517 machines where ptrdiff_t is a different size that doesn't widen
519 define_variable (envp
[i
], (unsigned int) (ep
- envp
[i
]),
521 /* Force exportation of every variable culled from the environment.
522 We used to rely on target_environment's v_default code to do this.
523 But that does not work for the case where an environment variable
524 is redefined in a makefile with `override'; it should then still
525 be exported, because it was originally in the environment. */
529 /* Decode the switches. */
531 decode_env_switches ("MAKEFLAGS", 9);
533 /* People write things like:
534 MFLAGS="CC=gcc -pipe" "CFLAGS=-g"
535 and we set the -p, -i and -e switches. Doesn't seem quite right. */
536 decode_env_switches ("MFLAGS", 6);
538 decode_switches (argc
, argv
, 0);
540 /* Print version information. */
542 if (print_version_flag
|| print_data_base_flag
|| debug_flag
)
545 /* `make --version' is supposed to just print the version and exit. */
546 if (print_version_flag
)
550 /* Set the "MAKE_COMMAND" variable to the name we were invoked with.
551 (If it is a relative pathname with a slash, prepend our directory name
552 so the result will run the same program regardless of the current dir.
553 If it is a name with no slash, we can only hope that PATH did not
554 find it in the current directory.) */
556 if (current_directory
[0] != '\0'
557 && argv
[0] != 0 && argv
[0][0] != '/' && index (argv
[0], '/') != 0)
558 argv
[0] = concat (current_directory
, "/", argv
[0]);
561 /* The extra indirection through $(MAKE_COMMAND) is done
562 for hysterical raisins. */
563 (void) define_variable ("MAKE_COMMAND", 12, argv
[0], o_default
, 0);
564 (void) define_variable ("MAKE", 4, "$(MAKE_COMMAND)", o_default
, 1);
567 /* If there were -C flags, move ourselves about. */
568 if (directories
!= 0)
569 for (i
= 0; directories
->list
[i
] != 0; ++i
)
571 char *dir
= directories
->list
[i
];
574 char *expanded
= tilde_expand (dir
);
579 pfatal_with_name (dir
);
580 if (dir
!= directories
->list
[i
])
584 /* Figure out the level of recursion. */
586 struct variable
*v
= lookup_variable ("MAKELEVEL", 9);
587 if (v
!= 0 && *v
->value
!= '\0' && *v
->value
!= '-')
588 makelevel
= (unsigned int) atoi (v
->value
);
593 /* Except under -s, always do -w in sub-makes and under -C. */
594 if (!silent_flag
&& (directories
!= 0 || makelevel
> 0))
595 print_directory_flag
= 1;
597 /* Let the user disable that with --no-print-directory. */
598 if (inhibit_print_directory_flag
)
599 print_directory_flag
= 0;
601 /* Construct the list of include directories to search. */
603 construct_include_path (include_directories
== 0 ? (char **) 0
604 : include_directories
->list
);
606 /* Figure out where we are now, after chdir'ing. */
607 if (directories
== 0)
608 /* We didn't move, so we're still in the same place. */
609 starting_directory
= current_directory
;
612 if (getcwd (current_directory
, GET_PATH_MAX
) == 0)
615 perror_with_name ("getcwd: ", "");
617 error ("getwd: %s", current_directory
);
619 starting_directory
= 0;
622 starting_directory
= current_directory
;
625 /* Tell the user where he is. */
627 if (print_directory_flag
)
628 log_working_directory (1);
630 /* Read any stdin makefiles into temporary files. */
634 register unsigned int i
;
635 for (i
= 0; i
< makefiles
->idx
; ++i
)
636 if (makefiles
->list
[i
][0] == '-' && makefiles
->list
[i
][1] == '\0')
638 /* This makefile is standard input. Since we may re-exec
639 and thus re-read the makefiles, we read standard input
640 into a temporary file and read from that. */
641 static char name
[] = "/tmp/GmXXXXXX";
644 /* Make a unique filename. */
645 (void) mktemp (name
);
647 outfile
= fopen (name
, "w");
649 pfatal_with_name ("fopen (temporary file)");
650 while (!feof (stdin
))
653 int n
= fread (buf
, 1, sizeof(buf
), stdin
);
654 if (n
> 0 && fwrite (buf
, 1, n
, outfile
) != n
)
655 pfatal_with_name ("fwrite (temporary file)");
657 /* Try to make sure we won't remake the temporary
658 file when we are re-exec'd. Kludge-o-matic! */
659 fprintf (outfile
, "%s:;\n", name
);
660 (void) fclose (outfile
);
662 /* Replace the name that read_all_makefiles will
663 see with the name of the temporary file. */
666 /* SGI compiler requires alloca's result be assigned simply. */
667 temp
= (char *) alloca (sizeof (name
));
668 bcopy (name
, temp
, sizeof (name
));
669 makefiles
->list
[i
] = temp
;
672 /* Make sure the temporary file will not be remade. */
673 f
= enter_file (savestring (name
, sizeof name
- 1));
675 f
->update_status
= 0;
676 f
->command_state
= cs_finished
;
677 /* Let it be removed when we're done. */
679 /* But don't mention it. */
684 /* Set up to handle children dying. This must be done before
685 reading in the makefiles so that `shell' function calls will work. */
688 (void) signal (SIGCHLD
, child_handler
);
691 (void) signal (SIGCLD
, child_handler
);
694 /* Define the initial list of suffixes for old-style rules. */
696 set_default_suffixes ();
698 /* Define the file rules for the built-in suffix rules. These will later
699 be converted into pattern rules. We used to do this in
700 install_default_implicit_rules, but since that happens after reading
701 makefiles, it results in the built-in pattern rules taking precedence
702 over makefile-specified suffix rules, which is wrong. */
704 install_default_suffix_rules ();
706 /* Define some internal and special variables. */
708 define_automatic_variables ();
710 /* Set up the MAKEFLAGS and MFLAGS variables
711 so makefiles can look at them. */
713 define_makeflags (0, 0);
715 /* Define the default variables. */
716 define_default_variables ();
718 /* Read all the makefiles. */
720 default_file
= enter_file (".DEFAULT");
723 = read_all_makefiles (makefiles
== 0 ? (char **) 0 : makefiles
->list
);
725 /* Decode switches again, in case the variables were set by the makefile. */
726 decode_env_switches ("MAKEFLAGS", 9);
728 decode_env_switches ("MFLAGS", 6);
731 /* Set up MAKEFLAGS and MFLAGS again, so they will be right. */
733 define_makeflags (1, 0);
735 ignore_errors_flag
|= lookup_file (".IGNORE") != 0;
737 silent_flag
|= lookup_file (".SILENT") != 0;
739 /* Make each `struct dep' point at the
740 `struct file' for the file depended on. */
744 /* Convert old-style suffix rules to pattern rules. It is important to
745 do this before installing the built-in pattern rules below, so that
746 makefile-specified suffix rules take precedence over built-in pattern
749 convert_to_pattern ();
751 /* Install the default implicit pattern rules.
752 This used to be done before reading the makefiles.
753 But in that case, built-in pattern rules were in the chain
754 before user-defined ones, so they matched first. */
756 install_default_implicit_rules ();
758 /* Compute implicit rule limits. */
760 count_implicit_rule_limits ();
762 /* Construct the listings of directories in VPATH lists. */
764 build_vpath_lists ();
766 /* Mark files given with -o flags as very old (00:00:01.00 Jan 1, 1970)
767 and as having been updated already, and files given with -W flags as
768 brand new (time-stamp as far as possible into the future). */
771 for (p
= old_files
->list
; *p
!= 0; ++p
)
773 f
= enter_command_line_file (*p
);
774 f
->last_mtime
= (time_t) 1;
776 f
->update_status
= 0;
777 f
->command_state
= cs_finished
;
782 for (p
= new_files
->list
; *p
!= 0; ++p
)
784 f
= enter_command_line_file (*p
);
785 f
->last_mtime
= NEW_MTIME
;
789 if (read_makefiles
!= 0)
791 /* Update any makefiles if necessary. */
793 time_t *makefile_mtimes
= 0;
794 unsigned int mm_idx
= 0;
797 puts ("Updating makefiles....");
799 /* Remove any makefiles we don't want to try to update.
800 Also record the current modtimes so we can compare them later. */
802 register struct dep
*d
, *last
;
807 register struct file
*f
= d
->file
;
809 for (f
= f
->double_colon
; f
!= NULL
; f
= f
->prev
)
811 if (f
->deps
== 0 && f
->cmds
!= 0)
813 /* This makefile is a :: target with commands, but
814 no dependencies. So, it will always be remade.
815 This might well cause an infinite loop, so don't
816 try to remake it. (This will only happen if
817 your makefiles are written exceptionally
818 stupidly; but if you work for Athena, that's how
819 you write your makefiles.) */
822 printf ("Makefile `%s' might loop; not remaking it.\n",
826 read_makefiles
= d
->next
;
828 last
->next
= d
->next
;
830 /* Free the storage. */
833 d
= last
== 0 ? 0 : last
->next
;
838 if (f
== NULL
|| !f
->double_colon
)
840 if (makefile_mtimes
== 0)
841 makefile_mtimes
= (time_t *) xmalloc (sizeof (time_t));
843 makefile_mtimes
= (time_t *)
844 xrealloc ((char *) makefile_mtimes
,
845 (mm_idx
+ 1) * sizeof (time_t));
846 makefile_mtimes
[mm_idx
++] = file_mtime_no_search (d
->file
);
853 /* Set up `MAKEFLAGS' specially while remaking makefiles. */
854 define_makeflags (1, 1);
856 switch (update_goal_chain (read_makefiles
, 1))
866 /* Failed to update. Figure out if we care. */
868 /* Nonzero if any makefile was successfully remade. */
870 /* Nonzero if any makefile we care about failed
871 in updating or could not be found at all. */
873 register unsigned int i
;
875 for (i
= 0; read_makefiles
!= 0; ++i
)
877 struct dep
*d
= read_makefiles
;
878 read_makefiles
= d
->next
;
879 if (d
->file
->updated
)
881 /* This makefile was updated. */
882 if (d
->file
->update_status
== 0)
884 /* It was successfully updated. */
885 any_remade
|= (file_mtime_no_search (d
->file
)
886 != makefile_mtimes
[i
]);
888 else if (! (d
->changed
& RM_DONTCARE
))
891 /* The update failed and this makefile was not
892 from the MAKEFILES variable, so we care. */
893 error ("Failed to remake makefile `%s'.",
895 mtime
= file_mtime_no_search (d
->file
);
896 any_remade
|= (mtime
!= (time_t) -1
897 && mtime
!= makefile_mtimes
[i
]);
901 /* This makefile was not found at all. */
902 if (! (d
->changed
& RM_DONTCARE
))
904 /* This is a makefile we care about. See how much. */
905 if (d
->changed
& RM_INCLUDED
)
906 /* An included makefile. We don't need
907 to die, but we do want to complain. */
908 error ("Included makefile `%s' was not found.",
912 /* A normal makefile. We must die later. */
913 error ("Makefile `%s' was not found", dep_name (d
));
931 /* Updated successfully. Re-exec ourselves. */
933 remove_intermediates (0);
935 if (print_data_base_flag
)
938 if (print_directory_flag
)
939 log_working_directory (0);
943 /* These names might have changed. */
944 register unsigned int i
, j
= 0;
945 for (i
= 1; i
< argc
; ++i
)
946 if (!strcmp (argv
[i
], "-f")) /* XXX */
948 char *p
= &argv
[i
][2];
950 argv
[++i
] = makefiles
->list
[j
];
952 argv
[i
] = concat ("-f", makefiles
->list
[j
], "");
957 if (directories
!= 0 && directories
->idx
> 0)
960 if (directory_before_chdir
!= 0)
962 if (chdir (directory_before_chdir
) < 0)
964 perror_with_name ("chdir", "");
973 fatal ("Couldn't change back to original directory.");
976 for (p
= environ
; *p
!= 0; ++p
)
977 if (!strncmp (*p
, "MAKELEVEL=", 10))
979 /* The SGI compiler apparently can't understand
980 the concept of storing the result of a function
981 in something other than a local variable. */
983 sgi_loses
= (char *) alloca (40);
985 sprintf (*p
, "MAKELEVEL=%u", makelevel
);
992 fputs ("Re-executing:", stdout
);
993 for (p
= argv
; *p
!= 0; ++p
)
1001 exec_command (argv
, environ
);
1006 /* Set up `MAKEFLAGS' again for the normal targets. */
1007 define_makeflags (1, 0);
1012 /* If there were no command-line goals, use the default. */
1015 if (default_goal_file
!= 0)
1017 goals
= (struct dep
*) xmalloc (sizeof (struct dep
));
1020 goals
->file
= default_goal_file
;
1028 /* Update the goals. */
1031 puts ("Updating goal targets....");
1033 switch (update_goal_chain (goals
, 0))
1036 /* Nothing happened. */
1038 /* Updated successfully. */
1042 /* Updating failed. */
1046 /* We are under -q and would run some commands. */
1055 if (read_makefiles
== 0)
1056 fatal ("No targets specified and no makefile found");
1058 fatal ("No targets");
1068 /* Parsing of arguments, decoding of switches. */
1070 static char options
[1 + sizeof (switches
) / sizeof (switches
[0]) * 3];
1071 static struct option long_options
[(sizeof (switches
) / sizeof (switches
[0])) +
1072 (sizeof (long_option_aliases
) /
1073 sizeof (long_option_aliases
[0]))];
1075 /* Fill in the string and vector for getopt. */
1081 register unsigned int i
;
1083 if (options
[0] != '\0')
1089 /* Return switch and non-switch args in order, regardless of
1090 POSIXLY_CORRECT. Non-switch args are returned as option 1. */
1093 for (i
= 0; switches
[i
].c
!= '\0'; ++i
)
1095 long_options
[i
].name
= (switches
[i
].long_name
== 0 ? "" :
1096 switches
[i
].long_name
);
1097 long_options
[i
].flag
= 0;
1098 long_options
[i
].val
= switches
[i
].c
;
1099 if (isalnum (switches
[i
].c
))
1100 *p
++ = switches
[i
].c
;
1101 switch (switches
[i
].type
)
1106 long_options
[i
].has_arg
= no_argument
;
1112 if (isalnum (switches
[i
].c
))
1114 if (switches
[i
].noarg_value
!= 0)
1116 if (isalnum (switches
[i
].c
))
1118 long_options
[i
].has_arg
= optional_argument
;
1121 long_options
[i
].has_arg
= required_argument
;
1126 for (c
= 0; c
< (sizeof (long_option_aliases
) /
1127 sizeof (long_option_aliases
[0]));
1129 long_options
[i
++] = long_option_aliases
[c
];
1130 long_options
[i
].name
= 0;
1133 /* Decode switches from ARGC and ARGV.
1134 They came from the environment if ENV is nonzero. */
1137 decode_switches (argc
, argv
, env
)
1143 register const struct command_switch
*cs
;
1144 register struct stringlist
*sl
;
1147 /* getopt does most of the parsing for us.
1148 First, get its vectors set up. */
1152 /* Let getopt produce error messages for the command line,
1153 but not for options from the environment. */
1155 /* Reset getopt's state. */
1159 while (optind
< argc
)
1163 /* There are no more options according to getting getopt, but
1164 there are some arguments left. Since we have asked for
1165 non-option arguments to be returned in order, I think this
1166 only happens when there is a "--" argument to prevent later
1167 argument from being options. Since getopt has finished its
1168 job, just update its state variables for the next argument and
1169 set C as if it had returned 1, indicating a non-option
1171 optarg
= argv
[optind
++];
1175 /* Parse the next argument. */
1176 c
= getopt_long (argc
, argv
, options
, long_options
, (int *) 0);
1180 /* Non-option argument. It might be a variable definition. */
1182 v
= try_variable_definition ((char *) 0, 0, optarg
, o_command
);
1185 /* It is indeed a variable definition. Record a pointer to
1186 the variable for later use in define_makeflags. */
1187 struct command_variable
*cv
1188 = (struct command_variable
*) xmalloc (sizeof (*cv
));
1190 cv
->next
= command_variables
;
1191 command_variables
= cv
;
1195 /* Not an option or variable definition; it must be a goal
1196 target! Enter it as a file and add it to the dep chain of
1198 struct file
*f
= enter_command_line_file (optarg
);
1203 goals
= (struct dep
*) xmalloc (sizeof (struct dep
));
1209 = (struct dep
*) xmalloc (sizeof (struct dep
));
1210 lastgoal
= lastgoal
->next
;
1217 /* Bad option. We will print a usage message and die later.
1218 But continue to parse the other options so the user can
1219 see all he did wrong. */
1222 for (cs
= switches
; cs
->c
!= '\0'; ++cs
)
1225 /* Whether or not we will actually do anything with
1226 this switch. We test this individually inside the
1227 switch below rather than just once outside it, so that
1228 options which are to be ignored still consume args. */
1229 int doit
= !env
|| cs
->env
;
1242 *(int *) cs
->value_ptr
= cs
->type
== flag
;
1250 optarg
= cs
->noarg_value
;
1252 sl
= *(struct stringlist
**) cs
->value_ptr
;
1255 sl
= (struct stringlist
*)
1256 xmalloc (sizeof (struct stringlist
));
1259 sl
->list
= (char **) xmalloc (5 * sizeof (char *));
1260 *(struct stringlist
**) cs
->value_ptr
= sl
;
1262 else if (sl
->idx
== sl
->max
- 1)
1265 sl
->list
= (char **)
1266 xrealloc ((char *) sl
->list
,
1267 sl
->max
* sizeof (char *));
1269 sl
->list
[sl
->idx
++] = optarg
;
1270 sl
->list
[sl
->idx
] = 0;
1274 if (optarg
== 0 && argc
> optind
1275 && isdigit (argv
[optind
][0]))
1276 optarg
= argv
[optind
++];
1283 int i
= atoi (optarg
);
1287 error ("the `-%c' option requires a \
1288 positive integral argument",
1293 *(unsigned int *) cs
->value_ptr
= i
;
1296 *(unsigned int *) cs
->value_ptr
1297 = *(unsigned int *) cs
->noarg_value
;
1301 if (optarg
== 0 && optind
< argc
1302 && (isdigit (argv
[optind
][0]) || argv
[optind
][0] == '.'))
1303 optarg
= argv
[optind
++];
1306 *(double *) cs
->value_ptr
1307 = (optarg
!= 0 ? atof (optarg
)
1308 : *(double *) cs
->noarg_value
);
1313 /* We've found the switch. Stop looking. */
1318 if (!env
&& (bad
|| print_usage_flag
))
1320 /* Print a nice usage message. */
1322 if (print_version_flag
)
1325 fprintf (stderr
, "Usage: %s [options] [target] ...\n", program
);
1327 fputs ("Options:\n", stderr
);
1328 for (cs
= switches
; cs
->c
!= '\0'; ++cs
)
1330 char buf
[1024], shortarg
[50], longarg
[50], *p
;
1332 if (cs
->description
[0] == '-')
1335 switch (long_options
[cs
- switches
].has_arg
)
1338 shortarg
[0] = longarg
[0] = '\0';
1340 case required_argument
:
1341 sprintf (longarg
, "=%s", cs
->argdesc
);
1342 sprintf (shortarg
, " %s", cs
->argdesc
);
1344 case optional_argument
:
1345 sprintf (longarg
, "[=%s]", cs
->argdesc
);
1346 sprintf (shortarg
, " [%s]", cs
->argdesc
);
1352 if (isalnum (cs
->c
))
1354 sprintf (buf
, " -%c%s", cs
->c
, shortarg
);
1357 if (cs
->long_name
!= 0)
1360 sprintf (p
, "%s--%s%s",
1361 !isalnum (cs
->c
) ? " " : ", ",
1362 cs
->long_name
, longarg
);
1364 for (i
= 0; i
< (sizeof (long_option_aliases
) /
1365 sizeof (long_option_aliases
[0]));
1367 if (long_option_aliases
[i
].val
== cs
->c
)
1369 sprintf (p
, ", --%s%s",
1370 long_option_aliases
[i
].name
, longarg
);
1375 const struct command_switch
*ncs
= cs
;
1376 while ((++ncs
)->c
!= '\0')
1377 if (ncs
->description
[0] == '-' &&
1378 ncs
->description
[1] == cs
->c
)
1380 /* This is another switch that does the same
1381 one as the one we are processing. We want
1382 to list them all together on one line. */
1383 sprintf (p
, ", -%c%s", ncs
->c
, shortarg
);
1385 if (ncs
->long_name
!= 0)
1387 sprintf (p
, ", --%s%s", ncs
->long_name
, longarg
);
1393 if (p
- buf
> DESCRIPTION_COLUMN
- 2)
1394 /* The list of option names is too long to fit on the same
1395 line with the description, leaving at least two spaces.
1396 Print it on its own line instead. */
1398 fprintf (stderr
, "%s\n", buf
);
1402 fprintf (stderr
, "%*s%s.\n",
1403 - DESCRIPTION_COLUMN
,
1404 buf
, cs
->description
);
1411 /* Decode switches from environment variable ENVAR (which is LEN chars long).
1412 We do this by chopping the value into a vector of words, prepending a
1413 dash to the first word if it lacks one, and passing the vector to
1417 decode_env_switches (envar
, len
)
1421 char *varref
= (char *) alloca (2 + len
+ 2);
1426 /* Get the variable's value. */
1429 bcopy (envar
, &varref
[2], len
);
1430 varref
[2 + len
] = ')';
1431 varref
[2 + len
+ 1] = '\0';
1432 value
= variable_expand (varref
);
1434 /* Skip whitespace, and check for an empty value. */
1435 value
= next_token (value
);
1436 len
= strlen (value
);
1440 /* Allocate a vector that is definitely big enough. */
1441 argv
= (char **) alloca ((1 + len
+ 1) * sizeof (char *));
1443 /* Allocate a buffer to copy the value into while we split it into words
1444 and unquote it. We must use permanent storage for this because
1445 decode_switches may store pointers into the passed argument words. */
1446 p
= (char *) xmalloc (2 * len
);
1448 /* getopt will look at the arguments starting at ARGV[1].
1449 Prepend a spacer word. */
1453 while (*value
!= '\0')
1456 ++value
; /* Skip the backslash. */
1457 else if (isblank (*value
))
1459 /* End of the word. */
1464 while (isblank (*value
));
1472 if (argc
== 2 && argv
[1][0] != '-')
1474 /* There is just one word in the value, and it is not a switch.
1475 Either this is the single-word form and we should prepend a dash
1476 before calling decode_switches, or this is the multi-word form and
1477 there is no dash because it is a variable definition. */
1479 v
= try_variable_definition ((char *) 0, 0, argv
[1], o_command
);
1482 /* It was indeed a variable definition, and now it has been
1483 processed. There is nothing for decode_switches to do.
1484 Record a pointer to the variable for later use in
1485 define_makeflags. */
1486 struct command_variable
*cv
1487 = (struct command_variable
*) xmalloc (sizeof (*cv
));
1489 cv
->next
= command_variables
;
1490 command_variables
= cv
;
1494 /* It wasn't a variable definition, so it's some switches without a
1495 leading dash. Add one and pass it along to decode_switches. We
1496 need permanent storage for this in case decode_switches saves
1497 pointers into the value. */
1498 argv
[1] = concat ("-", argv
[1], "");
1501 /* Parse those words. */
1502 decode_switches (argc
, argv
, 1);
1505 /* Quote the string IN so that it will be interpreted as a single word with
1506 no magic by the shell. Write the result into OUT, returning the address
1507 of the next character to be written. Allocating space for OUT twice the
1508 length of IN is always sufficient. */
1515 shell_quote (out
, in
)
1520 if (index ("^;'\"*?[]$<>(){}|&~`\\ \t\r\n\f\v", *in
) != 0)
1528 /* Define the MAKEFLAGS and MFLAGS variables to reflect the settings of the
1529 command switches. Include options with args if ALL is nonzero.
1530 Don't include options with the `no_makefile' flag set if MAKEFILE. */
1533 define_makeflags (all
, makefile
)
1536 register const struct command_switch
*cs
;
1541 struct command_variable
*cv
;
1543 /* We will construct a linked list of `struct flag's describing
1544 all the flags which need to go in MAKEFLAGS. Then, once we
1545 know how many there are and their lengths, we can put them all
1546 together in a string. */
1551 const struct command_switch
*cs
;
1553 unsigned int arglen
;
1555 struct flag
*flags
= 0;
1556 unsigned int flagslen
= 0;
1557 #define ADD_FLAG(ARG, LEN) \
1559 struct flag *new = (struct flag *) alloca (sizeof (struct flag)); \
1562 new->arglen = (LEN); \
1563 new->next = flags; \
1565 if (new->arg == 0) \
1566 ++flagslen; /* Just a single flag letter. */ \
1568 flagslen += 1 + 1 + 1 + 1 + 2 * new->arglen; /* " -x foo" */ \
1569 if (!isalnum (cs->c)) \
1570 /* This switch has no single-letter version, so we use the long. */ \
1571 flagslen += 2 + strlen (cs->long_name); \
1574 for (cs
= switches
; cs
->c
!= '\0'; ++cs
)
1575 if (cs
->toenv
&& (!makefile
|| !cs
->no_makefile
))
1586 if (!*(int *) cs
->value_ptr
== (cs
->type
== flag_off
)
1587 && (cs
->default_value
== 0
1588 || *(int *) cs
->value_ptr
!= *(int *) cs
->default_value
))
1595 if ((cs
->default_value
!= 0
1596 && (*(unsigned int *) cs
->value_ptr
1597 == *(unsigned int *) cs
->default_value
)))
1599 else if (cs
->noarg_value
!= 0
1600 && (*(unsigned int *) cs
->value_ptr
==
1601 *(unsigned int *) cs
->noarg_value
))
1602 ADD_FLAG ("", 0); /* Optional value omitted; see below. */
1603 else if (cs
->c
== 'j')
1604 /* Special case for `-j'. */
1608 char *buf
= (char *) alloca (30);
1609 sprintf (buf
, "%u", *(unsigned int *) cs
->value_ptr
);
1610 ADD_FLAG (buf
, strlen (buf
));
1618 if (cs
->default_value
!= 0
1619 && (*(double *) cs
->value_ptr
1620 == *(double *) cs
->default_value
))
1622 else if (cs
->noarg_value
!= 0
1623 && (*(double *) cs
->value_ptr
1624 == *(double *) cs
->noarg_value
))
1625 ADD_FLAG ("", 0); /* Optional value omitted; see below. */
1628 char *buf
= (char *) alloca (100);
1629 sprintf (buf
, "%g", *(double *) cs
->value_ptr
);
1630 ADD_FLAG (buf
, strlen (buf
));
1638 struct stringlist
*sl
= *(struct stringlist
**) cs
->value_ptr
;
1641 /* Add the elements in reverse order, because
1642 all the flags get reversed below; and the order
1643 matters for some switches (like -I). */
1644 register unsigned int i
= sl
->idx
;
1646 ADD_FLAG (sl
->list
[i
], strlen (sl
->list
[i
]));
1654 if (all
&& command_variables
!= 0)
1656 /* Now figure out how much space will be taken up
1657 by the command-line variable definitions. */
1658 flagslen
+= 4; /* For the possible " -- ". */
1659 for (cv
= command_variables
; cv
!= 0; cv
= cv
->next
)
1662 flagslen
+= 2 * strlen (v
->name
);
1666 flagslen
+= 2 * strlen (v
->value
);
1670 /* Construct the value in FLAGSTRING.
1671 We allocate enough space for a preceding dash and trailing null. */
1672 flagstring
= (char *) alloca (1 + flagslen
+ 1);
1678 /* Add the flag letter or name to the string. */
1679 if (!isalnum (flags
->cs
->c
))
1682 strcpy (p
, flags
->cs
->long_name
);
1686 *p
++ = flags
->cs
->c
;
1687 if (flags
->arg
!= 0)
1689 /* A flag that takes an optional argument which in this case
1690 is omitted is specified by ARG being "" and ARGLEN being 0.
1691 We must distinguish because a following flag appended without
1692 an intervening " -" is considered the arg for the first. */
1693 if (flags
->arglen
> 0)
1695 /* Add its argument too. */
1696 *p
++ = !isalnum (flags
->cs
->c
) ? '=' : ' ';
1697 bcopy (flags
->arg
, p
, flags
->arglen
);
1701 /* Write a following space and dash, for the next flag. */
1705 else if (!isalnum (flags
->cs
->c
))
1708 /* Long options must each go in their own word,
1709 so we write the following space and dash. */
1713 flags
= flags
->next
;
1716 if (all
&& command_variables
!= 0)
1718 /* Now write all the command-line variable definitions. */
1719 if (p
== &flagstring
[1])
1720 /* No flags written, so elide the leading dash already written. */
1724 /* Separate the variables from the switches with a "--" arg. */
1727 /* We did not already write a trailing " -". */
1731 /* There is a trailing " -"; fill it out to " -- ". */
1735 for (cv
= command_variables
; cv
!= 0; cv
= cv
->next
)
1738 p
= shell_quote (p
, v
->name
);
1742 p
= shell_quote (p
, v
->value
);
1746 --p
; /* Kill the final space. */
1748 else if (p
[-1] == '-')
1749 /* Kill the final space and dash. */
1752 /* Terminate the string. */
1755 v
= define_variable ("MAKEFLAGS", 9,
1756 /* If there is just a single word of switches,
1757 omit the leading dash unless it is a single
1758 long option with two leading dashes. */
1759 &flagstring
[(words
== 1 && command_variables
== 0
1760 && flagstring
[1] != '-')
1762 /* This used to use o_env, but that lost when a
1763 makefile defined MAKEFLAGS. Makefiles set
1764 MAKEFLAGS to add switches, but we still want
1765 to redefine its value with the full set of
1766 switches. Of course, an override or command
1767 definition will still take precedence. */
1770 /* The first time we are called, set MAKEFLAGS to always be exported.
1771 We should not do this again on the second call, because that is
1772 after reading makefiles which might have done `unexport MAKEFLAGS'. */
1773 v
->export
= v_export
;
1774 /* Since MFLAGS is not parsed for flags, there is no reason to
1775 override any makefile redefinition. */
1776 (void) define_variable ("MFLAGS", 6, flagstring
, o_env
, 0);
1779 /* Print version information. */
1784 static int printed_version
= 0;
1786 char *precede
= print_data_base_flag
? "# " : "";
1788 if (printed_version
)
1789 /* Do it only once. */
1792 printf ("%sGNU Make version %s", precede
, version_string
);
1793 if (remote_description
!= 0 && *remote_description
!= '\0')
1794 printf ("-%s", remote_description
);
1796 printf (", by Richard Stallman and Roland McGrath.\n\
1797 %sCopyright (C) 1988, 89, 90, 91, 92, 93, 94 Free Software Foundation, Inc.\n\
1798 %sThis is free software; see the source for copying conditions.\n\
1799 %sThere is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A\n\
1800 %sPARTICULAR PURPOSE.\n\n", precede
, precede
, precede
, precede
);
1802 printed_version
= 1;
1804 /* Flush stdout so the user doesn't have to wait to see the
1805 version information while things are thought about. */
1809 /* Print a bunch of information about this and that. */
1814 extern char *ctime ();
1817 when
= time ((time_t *) 0);
1818 printf ("\n# Make data base, printed on %s", ctime (&when
));
1820 print_variable_data_base ();
1821 print_dir_data_base ();
1822 print_rule_data_base ();
1823 print_file_data_base ();
1824 print_vpath_data_base ();
1826 when
= time ((time_t *) 0);
1827 printf ("\n# Finished Make data base on %s\n", ctime (&when
));
1830 /* Exit with STATUS, cleaning up as necessary. */
1836 static char dying
= 0;
1844 /* Try to move back to the original directory. This is essential on
1845 MS-DOS (where there is really only one process), and on Unix it
1846 puts core files in the original directory instead of the -C
1848 if (directory_before_chdir
!= 0)
1849 chdir (directory_before_chdir
);
1851 if (print_version_flag
)
1854 /* Wait for children to die. */
1855 for (err
= status
!= 0; job_slots_used
> 0; err
= 0)
1856 reap_children (1, err
);
1858 /* Remove the intermediate files. */
1859 remove_intermediates (0);
1861 if (print_data_base_flag
)
1864 if (print_directory_flag
)
1865 log_working_directory (0);
1871 /* Write a message indicating that we've just entered or
1872 left (according to ENTERING) the current directory. */
1875 log_working_directory (entering
)
1878 static int entered
= 0;
1879 char *message
= entering
? "Entering" : "Leaving";
1884 /* Don't print the leaving message if we
1885 haven't printed the entering message. */
1888 if (print_data_base_flag
)
1889 fputs ("# ", stdout
);
1892 printf ("%s: %s ", program
, message
);
1894 printf ("%s[%u]: %s ", program
, makelevel
, message
);
1896 if (starting_directory
== 0)
1897 puts ("an unknown directory");
1899 printf ("directory `%s'\n", starting_directory
);