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 after processing all -C options. */
317 char *starting_directory
;
319 /* Value of the MAKELEVEL variable at startup (or 0). */
321 unsigned int makelevel
;
323 /* First file defined in the makefile whose name does not
324 start with `.'. This is the default to remake if the
325 command line does not specify. */
327 struct file
*default_goal_file
;
329 /* Pointer to structure for the file .DEFAULT
330 whose commands are used for any file that has none of its own.
331 This is zero if the makefiles do not define .DEFAULT. */
333 struct file
*default_file
;
335 /* Mask of signals that are being caught with fatal_error_signal. */
338 sigset_t fatal_signal_set
;
340 #ifdef HAVE_SIGSETMASK
341 int fatal_signal_mask
;
346 enter_command_line_file (name
)
351 char *expanded
= tilde_expand (name
);
353 name
= expanded
; /* Memory leak; I don't care. */
356 /* This is also done in parse_file_seq, so this is redundant
357 for names read from makefiles. It is here for names passed
358 on the command line. */
359 while (name
[0] == '.' && name
[1] == '/' && name
[2] != '\0')
363 /* Skip following slashes: ".//foo" is "foo", not "/foo". */
369 /* It was all slashes! Move back to the dot and truncate
370 it after the first slash, so it becomes just "./". */
373 while (name
[0] != '.');
377 return enter_file (savestring (name
, strlen (name
)));
381 main (argc
, argv
, envp
)
386 extern void init_dir ();
387 extern RETSIGTYPE
fatal_error_signal (), child_handler ();
388 register struct file
*f
;
389 register unsigned int i
;
390 register char *cmd_defs
;
391 register unsigned int cmd_defs_len
, cmd_defs_idx
;
393 struct dep
*goals
= 0;
394 register struct dep
*lastgoal
;
395 struct dep
*read_makefiles
;
396 PATH_VAR (current_directory
);
397 char *directory_before_chdir
;
399 default_goal_file
= 0;
400 reading_filename
= 0;
401 reading_lineno_ptr
= 0;
403 #ifndef HAVE_SYS_SIGLIST
408 sigemptyset (&fatal_signal_set
);
409 #define ADD_SIG(sig) sigaddset (&fatal_signal_set, sig)
411 #ifdef HAVE_SIGSETMASK
412 fatal_signal_mask
= 0;
413 #define ADD_SIG(sig) fatal_signal_mask |= sigmask (sig)
419 #define FATAL_SIG(sig) \
420 if (signal ((sig), fatal_error_signal) == SIG_IGN) \
421 (void) signal ((sig), SIG_IGN); \
431 FATAL_SIG (SIGDANGER
);
442 /* Make sure stdout is line-buffered. */
444 #ifdef HAVE_SETLINEBUF
447 #ifndef SETVBUF_REVERSED
448 setvbuf (stdout
, (char *) 0, _IOLBF
, BUFSIZ
);
449 #else /* setvbuf not reversed. */
450 /* Some buggy systems lose if we pass 0 instead of allocating ourselves. */
451 setvbuf (stdout
, _IOLBF
, xmalloc (BUFSIZ
), BUFSIZ
);
452 #endif /* setvbuf reversed. */
453 #endif /* setlinebuf missing. */
455 /* Initialize the directory hashing code. */
458 /* Figure out where this program lives. */
462 if (argv
[0][0] == '\0')
466 program
= rindex (argv
[0], '/');
473 /* Set up to access user data (files). */
476 /* Figure out where we are. */
478 if (getcwd (current_directory
, GET_PATH_MAX
) == 0)
481 perror_with_name ("getcwd: ", "");
483 error ("getwd: %s", current_directory
);
485 current_directory
[0] = '\0';
486 directory_before_chdir
= 0;
489 directory_before_chdir
= savestring (current_directory
,
490 strlen (current_directory
));
492 /* Read in variables from the environment. It is important that this be
493 done before `MAKE' and `MAKEOVERRIDES' are figured out so their
494 definitions will not be ones from the environment. */
496 for (i
= 0; envp
[i
] != 0; ++i
)
498 register char *ep
= envp
[i
];
501 /* The result of pointer arithmetic is cast to unsigned int for
502 machines where ptrdiff_t is a different size that doesn't widen
504 define_variable (envp
[i
], (unsigned int) (ep
- envp
[i
]),
506 /* Force exportation of every variable culled from the environment.
507 We used to rely on target_environment's v_default code to do this.
508 But that does not work for the case where an environment variable
509 is redefined in a makefile with `override'; it should then still
510 be exported, because it was originally in the environment. */
514 /* Decode the switches. */
516 decode_env_switches ("MAKEFLAGS", 9);
518 /* People write things like:
519 MFLAGS="CC=gcc -pipe" "CFLAGS=-g"
520 and we set the -p, -i and -e switches. Doesn't seem quite right. */
521 decode_env_switches ("MFLAGS", 6);
523 decode_switches (argc
, argv
, 0);
525 /* Print version information. */
527 if (print_version_flag
|| print_data_base_flag
|| debug_flag
)
530 /* `make --version' is supposed to just print the version and exit. */
531 if (print_version_flag
)
534 /* Search for command line arguments that define variables,
535 and do the definitions. Also save up the text of these
536 arguments in CMD_DEFS so we can put them into the values
537 of $(MAKEOVERRIDES) and $(MAKE). */
540 cmd_defs
= (char *) xmalloc (cmd_defs_len
);
543 for (i
= 1; other_args
->list
[i
] != 0; ++i
)
545 if (other_args
->list
[i
][0] == '\0')
546 /* Ignore empty arguments, so they can't kill enter_file. */
549 /* Try a variable definition. */
550 if (try_variable_definition ((char *) 0, 0,
551 other_args
->list
[i
], o_command
))
553 /* It succeeded. The variable is already defined.
554 Backslash-quotify it and append it to CMD_DEFS, then clobber it
555 to 0 in the list so that it won't be taken for a goal target. */
556 register char *p
= other_args
->list
[i
];
557 unsigned int l
= strlen (p
);
558 if (cmd_defs_idx
+ (l
* 2) + 1 > cmd_defs_len
)
560 if (l
* 2 > cmd_defs_len
)
561 cmd_defs_len
+= l
* 2;
564 cmd_defs
= (char *) xrealloc (cmd_defs
, cmd_defs_len
);
569 if (index ("^;'\"*?[]$<>(){}|&~`\\ \t\r\n\f\v", *p
) != 0)
570 cmd_defs
[cmd_defs_idx
++] = '\\';
571 cmd_defs
[cmd_defs_idx
++] = *p
++;
573 cmd_defs
[cmd_defs_idx
++] = ' ';
577 /* It was not a variable definition, so it is a target to be made.
578 Enter it as a file and add it to the dep chain of goals. */
579 f
= enter_command_line_file (other_args
->list
[i
]);
584 goals
= (struct dep
*) xmalloc (sizeof (struct dep
));
589 lastgoal
->next
= (struct dep
*) xmalloc (sizeof (struct dep
));
590 lastgoal
= lastgoal
->next
;
597 if (cmd_defs_idx
> 0)
599 cmd_defs
[cmd_defs_idx
- 1] = '\0';
600 (void) define_variable ("MAKEOVERRIDES", 13, cmd_defs
, o_default
, 0);
604 /* Set the "MAKE_COMMAND" variable to the name we were invoked with.
605 (If it is a relative pathname with a slash, prepend our directory name
606 so the result will run the same program regardless of the current dir.
607 If it is a name with no slash, we can only hope that PATH did not
608 find it in the current directory.) */
610 if (current_directory
[0] != '\0'
611 && argv
[0] != 0 && argv
[0][0] != '/' && index (argv
[0], '/') != 0)
612 argv
[0] = concat (current_directory
, "/", argv
[0]);
614 (void) define_variable ("MAKE_COMMAND", 12, argv
[0], o_default
, 0);
616 /* Append the command-line variable definitions gathered above
617 so sub-makes will get them as command-line definitions. */
619 (void) define_variable ("MAKE", 4,
620 "$(MAKE_COMMAND) $(MAKEOVERRIDES)", o_default
, 1);
622 /* If there were -C flags, move ourselves about. */
624 if (directories
!= 0)
625 for (i
= 0; directories
->list
[i
] != 0; ++i
)
627 char *dir
= directories
->list
[i
];
630 char *expanded
= tilde_expand (dir
);
635 pfatal_with_name (dir
);
636 if (dir
!= directories
->list
[i
])
640 /* Figure out the level of recursion. */
642 struct variable
*v
= lookup_variable ("MAKELEVEL", 9);
643 if (v
!= 0 && *v
->value
!= '\0' && *v
->value
!= '-')
644 makelevel
= (unsigned int) atoi (v
->value
);
649 /* Except under -s, always do -w in sub-makes and under -C. */
650 if (!silent_flag
&& (directories
!= 0 || makelevel
> 0))
651 print_directory_flag
= 1;
653 /* Let the user disable that with --no-print-directory. */
654 if (inhibit_print_directory_flag
)
655 print_directory_flag
= 0;
657 /* Construct the list of include directories to search. */
659 construct_include_path (include_directories
== 0 ? (char **) 0
660 : include_directories
->list
);
662 /* Figure out where we are now, after chdir'ing. */
663 if (directories
== 0)
664 /* We didn't move, so we're still in the same place. */
665 starting_directory
= current_directory
;
668 if (getcwd (current_directory
, GET_PATH_MAX
) == 0)
671 perror_with_name ("getcwd: ", "");
673 error ("getwd: %s", current_directory
);
675 starting_directory
= 0;
678 starting_directory
= current_directory
;
681 /* Tell the user where he is. */
683 if (print_directory_flag
)
684 log_working_directory (1);
686 /* Read any stdin makefiles into temporary files. */
690 register unsigned int i
;
691 for (i
= 0; i
< makefiles
->idx
; ++i
)
692 if (makefiles
->list
[i
][0] == '-' && makefiles
->list
[i
][1] == '\0')
694 /* This makefile is standard input. Since we may re-exec
695 and thus re-read the makefiles, we read standard input
696 into a temporary file and read from that. */
697 static char name
[] = "/tmp/GmXXXXXX";
700 /* Make a unique filename. */
701 (void) mktemp (name
);
703 outfile
= fopen (name
, "w");
705 pfatal_with_name ("fopen (temporary file)");
706 while (!feof (stdin
))
709 int n
= fread (buf
, 1, sizeof(buf
), stdin
);
710 if (n
> 0 && fwrite (buf
, 1, n
, outfile
) != n
)
711 pfatal_with_name ("fwrite (temporary file)");
713 /* Try to make sure we won't remake the temporary
714 file when we are re-exec'd. Kludge-o-matic! */
715 fprintf (outfile
, "%s:;\n", name
);
716 (void) fclose (outfile
);
718 /* Replace the name that read_all_makefiles will
719 see with the name of the temporary file. */
722 /* SGI compiler requires alloca's result be assigned simply. */
723 temp
= (char *) alloca (sizeof (name
));
724 bcopy (name
, temp
, sizeof (name
));
725 makefiles
->list
[i
] = temp
;
728 /* Make sure the temporary file will not be remade. */
729 f
= enter_file (savestring (name
, sizeof name
- 1));
731 f
->update_status
= 0;
732 f
->command_state
= cs_finished
;
733 /* Let it be removed when we're done. */
735 /* But don't mention it. */
740 /* Set up to handle children dying. This must be done before
741 reading in the makefiles so that `shell' function calls will work. */
744 (void) signal (SIGCHLD
, child_handler
);
747 (void) signal (SIGCLD
, child_handler
);
750 /* Define the initial list of suffixes for old-style rules. */
752 set_default_suffixes ();
754 /* Define the file rules for the built-in suffix rules. These will later
755 be converted into pattern rules. We used to do this in
756 install_default_implicit_rules, but since that happens after reading
757 makefiles, it results in the built-in pattern rules taking precedence
758 over makefile-specified suffix rules, which is wrong. */
760 install_default_suffix_rules ();
762 /* Define some internal and special variables. */
764 define_automatic_variables ();
766 /* Set up the MAKEFLAGS and MFLAGS variables
767 so makefiles can look at them. */
769 define_makeflags (0, 0);
771 /* Define the default variables. */
772 define_default_variables ();
774 /* Read all the makefiles. */
776 default_file
= enter_file (".DEFAULT");
779 = read_all_makefiles (makefiles
== 0 ? (char **) 0 : makefiles
->list
);
781 /* Decode switches again, in case the variables were set by the makefile. */
782 decode_env_switches ("MAKEFLAGS", 9);
784 decode_env_switches ("MFLAGS", 6);
787 /* Set up MAKEFLAGS and MFLAGS again, so they will be right. */
789 define_makeflags (1, 0);
791 ignore_errors_flag
|= lookup_file (".IGNORE") != 0;
793 silent_flag
|= lookup_file (".SILENT") != 0;
795 /* Make each `struct dep' point at the
796 `struct file' for the file depended on. */
800 /* Convert old-style suffix rules to pattern rules. It is important to
801 do this before installing the built-in pattern rules below, so that
802 makefile-specified suffix rules take precedence over built-in pattern
805 convert_to_pattern ();
807 /* Install the default implicit pattern rules.
808 This used to be done before reading the makefiles.
809 But in that case, built-in pattern rules were in the chain
810 before user-defined ones, so they matched first. */
812 install_default_implicit_rules ();
814 /* Compute implicit rule limits. */
816 count_implicit_rule_limits ();
818 /* Construct the listings of directories in VPATH lists. */
820 build_vpath_lists ();
822 /* Mark files given with -o flags as very old (00:00:01.00 Jan 1, 1970)
823 and as having been updated already, and files given with -W flags as
824 brand new (time-stamp as far as possible into the future). */
827 for (p
= old_files
->list
; *p
!= 0; ++p
)
829 f
= enter_command_line_file (*p
);
830 f
->last_mtime
= (time_t) 1;
832 f
->update_status
= 0;
833 f
->command_state
= cs_finished
;
838 for (p
= new_files
->list
; *p
!= 0; ++p
)
840 f
= enter_command_line_file (*p
);
841 f
->last_mtime
= NEW_MTIME
;
845 if (read_makefiles
!= 0)
847 /* Update any makefiles if necessary. */
849 time_t *makefile_mtimes
= 0;
850 unsigned int mm_idx
= 0;
853 puts ("Updating makefiles....");
855 /* Remove any makefiles we don't want to try to update.
856 Also record the current modtimes so we can compare them later. */
858 register struct dep
*d
, *last
;
863 register struct file
*f
= d
->file
;
865 for (f
= f
->double_colon
; f
!= NULL
; f
= f
->prev
)
867 if (f
->deps
== 0 && f
->cmds
!= 0)
869 /* This makefile is a :: target with commands, but
870 no dependencies. So, it will always be remade.
871 This might well cause an infinite loop, so don't
872 try to remake it. (This will only happen if
873 your makefiles are written exceptionally
874 stupidly; but if you work for Athena, that's how
875 you write your makefiles.) */
878 printf ("Makefile `%s' might loop; not remaking it.\n",
882 read_makefiles
= d
->next
;
884 last
->next
= d
->next
;
886 /* Free the storage. */
889 d
= last
== 0 ? 0 : last
->next
;
894 if (f
== NULL
|| !f
->double_colon
)
896 if (makefile_mtimes
== 0)
897 makefile_mtimes
= (time_t *) xmalloc (sizeof (time_t));
899 makefile_mtimes
= (time_t *)
900 xrealloc ((char *) makefile_mtimes
,
901 (mm_idx
+ 1) * sizeof (time_t));
902 makefile_mtimes
[mm_idx
++] = file_mtime_no_search (d
->file
);
909 /* Set up `MAKEFLAGS' specially while remaking makefiles. */
910 define_makeflags (1, 1);
912 switch (update_goal_chain (read_makefiles
, 1))
922 /* Failed to update. Figure out if we care. */
924 /* Nonzero if any makefile was successfully remade. */
926 /* Nonzero if any makefile we care about failed
927 in updating or could not be found at all. */
929 register unsigned int i
;
931 for (i
= 0; read_makefiles
!= 0; ++i
)
933 struct dep
*d
= read_makefiles
;
934 read_makefiles
= d
->next
;
935 if (d
->file
->updated
)
937 /* This makefile was updated. */
938 if (d
->file
->update_status
== 0)
940 /* It was successfully updated. */
941 any_remade
|= (file_mtime_no_search (d
->file
)
942 != makefile_mtimes
[i
]);
944 else if (! (d
->changed
& RM_DONTCARE
))
947 /* The update failed and this makefile was not
948 from the MAKEFILES variable, so we care. */
949 error ("Failed to remake makefile `%s'.",
951 mtime
= file_mtime_no_search (d
->file
);
952 any_remade
|= (mtime
!= (time_t) -1
953 && mtime
!= makefile_mtimes
[i
]);
957 /* This makefile was not found at all. */
958 if (! (d
->changed
& RM_DONTCARE
))
960 /* This is a makefile we care about. See how much. */
961 if (d
->changed
& RM_INCLUDED
)
962 /* An included makefile. We don't need
963 to die, but we do want to complain. */
964 error ("Included makefile `%s' was not found.",
968 /* A normal makefile. We must die later. */
969 error ("Makefile `%s' was not found", dep_name (d
));
987 /* Updated successfully. Re-exec ourselves. */
989 remove_intermediates (0);
991 if (print_data_base_flag
)
994 if (print_directory_flag
)
995 log_working_directory (0);
999 /* These names might have changed. */
1000 register unsigned int i
, j
= 0;
1001 for (i
= 1; i
< argc
; ++i
)
1002 if (!strcmp (argv
[i
], "-f")) /* XXX */
1004 char *p
= &argv
[i
][2];
1006 argv
[++i
] = makefiles
->list
[j
];
1008 argv
[i
] = concat ("-f", makefiles
->list
[j
], "");
1013 if (directories
!= 0 && directories
->idx
> 0)
1016 if (directory_before_chdir
!= 0)
1018 if (chdir (directory_before_chdir
) < 0)
1020 perror_with_name ("chdir", "");
1029 fatal ("Couldn't change back to original directory.");
1032 for (p
= environ
; *p
!= 0; ++p
)
1033 if (!strncmp (*p
, "MAKELEVEL=", 10))
1035 /* The SGI compiler apparently can't understand
1036 the concept of storing the result of a function
1037 in something other than a local variable. */
1039 sgi_loses
= (char *) alloca (40);
1041 sprintf (*p
, "MAKELEVEL=%u", makelevel
);
1048 fputs ("Re-executing:", stdout
);
1049 for (p
= argv
; *p
!= 0; ++p
)
1057 exec_command (argv
, environ
);
1062 /* Set up `MAKEFLAGS' again for the normal targets. */
1063 define_makeflags (1, 0);
1068 /* If there were no command-line goals, use the default. */
1071 if (default_goal_file
!= 0)
1073 goals
= (struct dep
*) xmalloc (sizeof (struct dep
));
1076 goals
->file
= default_goal_file
;
1084 /* Update the goals. */
1087 puts ("Updating goal targets....");
1089 switch (update_goal_chain (goals
, 0))
1092 /* Nothing happened. */
1094 /* Updated successfully. */
1098 /* Updating failed. */
1102 /* We are under -q and would run some commands. */
1111 if (read_makefiles
== 0)
1112 fatal ("No targets specified and no makefile found");
1114 fatal ("No targets");
1124 /* Parsing of arguments, decoding of switches. */
1126 static char options
[sizeof (switches
) / sizeof (switches
[0]) * 3];
1127 static struct option long_options
[(sizeof (switches
) / sizeof (switches
[0])) +
1128 (sizeof (long_option_aliases
) /
1129 sizeof (long_option_aliases
[0]))];
1131 /* Fill in the string and vector for getopt. */
1137 register unsigned int i
;
1139 if (options
[0] != '\0')
1144 for (i
= 0; switches
[i
].c
!= '\0'; ++i
)
1146 long_options
[i
].name
= (switches
[i
].long_name
== 0 ? "" :
1147 switches
[i
].long_name
);
1148 long_options
[i
].flag
= 0;
1149 long_options
[i
].val
= switches
[i
].c
;
1150 if (isalnum (switches
[i
].c
))
1151 *p
++ = switches
[i
].c
;
1152 switch (switches
[i
].type
)
1157 long_options
[i
].has_arg
= no_argument
;
1163 if (isalnum (switches
[i
].c
))
1165 if (switches
[i
].noarg_value
!= 0)
1167 if (isalnum (switches
[i
].c
))
1169 long_options
[i
].has_arg
= optional_argument
;
1172 long_options
[i
].has_arg
= required_argument
;
1177 for (c
= 0; c
< (sizeof (long_option_aliases
) /
1178 sizeof (long_option_aliases
[0]));
1180 long_options
[i
++] = long_option_aliases
[c
];
1181 long_options
[i
].name
= 0;
1184 /* Decode switches from ARGC and ARGV.
1185 They came from the environment if ENV is nonzero. */
1188 decode_switches (argc
, argv
, env
)
1194 register const struct command_switch
*cs
;
1195 register struct stringlist
*sl
;
1200 other_args
= (struct stringlist
*) xmalloc (sizeof (struct stringlist
));
1201 other_args
->max
= argc
+ 1;
1202 other_args
->list
= (char **) xmalloc ((argc
+ 1) * sizeof (char *));
1203 other_args
->idx
= 1;
1204 other_args
->list
[0] = argv
[0];
1207 /* getopt does most of the parsing for us.
1208 First, get its vectors set up. */
1212 /* Let getopt produce error messages for the command line,
1213 but not for options from the environment. */
1215 /* Reset getopt's state. */
1218 while ((c
= getopt_long (argc
, argv
,
1219 options
, long_options
, (int *) 0)) != EOF
)
1222 /* Bad option. We will print a usage message and die later.
1223 But continue to parse the other options so the user can
1224 see all he did wrong. */
1227 for (cs
= switches
; cs
->c
!= '\0'; ++cs
)
1230 /* Whether or not we will actually do anything with
1231 this switch. We test this individually inside the
1232 switch below rather than just once outside it, so that
1233 options which are to be ignored still consume args. */
1234 int doit
= !env
|| cs
->env
;
1247 *(int *) cs
->value_ptr
= cs
->type
== flag
;
1255 optarg
= cs
->noarg_value
;
1257 sl
= *(struct stringlist
**) cs
->value_ptr
;
1260 sl
= (struct stringlist
*)
1261 xmalloc (sizeof (struct stringlist
));
1264 sl
->list
= (char **) xmalloc (5 * sizeof (char *));
1265 *(struct stringlist
**) cs
->value_ptr
= sl
;
1267 else if (sl
->idx
== sl
->max
- 1)
1270 sl
->list
= (char **)
1271 xrealloc ((char *) sl
->list
,
1272 sl
->max
* sizeof (char *));
1274 sl
->list
[sl
->idx
++] = optarg
;
1275 sl
->list
[sl
->idx
] = 0;
1279 if (optarg
== 0 && argc
> optind
1280 && isdigit (argv
[optind
][0]))
1281 optarg
= argv
[optind
++];
1288 int i
= atoi (optarg
);
1292 error ("the `-%c' option requires a \
1293 positive integral argument",
1298 *(unsigned int *) cs
->value_ptr
= i
;
1301 *(unsigned int *) cs
->value_ptr
1302 = *(unsigned int *) cs
->noarg_value
;
1306 if (optarg
== 0 && optind
< argc
1307 && (isdigit (argv
[optind
][0]) || argv
[optind
][0] == '.'))
1308 optarg
= argv
[optind
++];
1311 *(double *) cs
->value_ptr
1312 = (optarg
!= 0 ? atof (optarg
)
1313 : *(double *) cs
->noarg_value
);
1318 /* We've found the switch. Stop looking. */
1325 /* Collect the remaining args in the `other_args' string list. */
1327 while (optind
< argc
)
1329 char *arg
= argv
[optind
++];
1330 if (arg
[0] != '-' || arg
[1] != '\0')
1331 other_args
->list
[other_args
->idx
++] = arg
;
1333 other_args
->list
[other_args
->idx
] = 0;
1336 if (!env
&& (bad
|| print_usage_flag
))
1338 /* Print a nice usage message. */
1340 if (print_version_flag
)
1343 fprintf (stderr
, "Usage: %s [options] [target] ...\n", program
);
1345 fputs ("Options:\n", stderr
);
1346 for (cs
= switches
; cs
->c
!= '\0'; ++cs
)
1348 char buf
[1024], shortarg
[50], longarg
[50], *p
;
1350 if (cs
->description
[0] == '-')
1353 switch (long_options
[cs
- switches
].has_arg
)
1356 shortarg
[0] = longarg
[0] = '\0';
1358 case required_argument
:
1359 sprintf (longarg
, "=%s", cs
->argdesc
);
1360 sprintf (shortarg
, " %s", cs
->argdesc
);
1362 case optional_argument
:
1363 sprintf (longarg
, "[=%s]", cs
->argdesc
);
1364 sprintf (shortarg
, " [%s]", cs
->argdesc
);
1370 if (isalnum (cs
->c
))
1372 sprintf (buf
, " -%c%s", cs
->c
, shortarg
);
1375 if (cs
->long_name
!= 0)
1378 sprintf (p
, "%s--%s%s",
1379 !isalnum (cs
->c
) ? " " : ", ",
1380 cs
->long_name
, longarg
);
1382 for (i
= 0; i
< (sizeof (long_option_aliases
) /
1383 sizeof (long_option_aliases
[0]));
1385 if (long_option_aliases
[i
].val
== cs
->c
)
1387 sprintf (p
, ", --%s%s",
1388 long_option_aliases
[i
].name
, longarg
);
1393 const struct command_switch
*ncs
= cs
;
1394 while ((++ncs
)->c
!= '\0')
1395 if (ncs
->description
[0] == '-' &&
1396 ncs
->description
[1] == cs
->c
)
1398 /* This is another switch that does the same
1399 one as the one we are processing. We want
1400 to list them all together on one line. */
1401 sprintf (p
, ", -%c%s", ncs
->c
, shortarg
);
1403 if (ncs
->long_name
!= 0)
1405 sprintf (p
, ", --%s%s", ncs
->long_name
, longarg
);
1411 if (p
- buf
> DESCRIPTION_COLUMN
- 2)
1412 /* The list of option names is too long to fit on the same
1413 line with the description, leaving at least two spaces.
1414 Print it on its own line instead. */
1416 fprintf (stderr
, "%s\n", buf
);
1420 fprintf (stderr
, "%*s%s.\n",
1421 - DESCRIPTION_COLUMN
,
1422 buf
, cs
->description
);
1429 /* Decode switches from environment variable ENVAR (which is LEN chars long).
1430 We do this by chopping the value into a vector of words, prepending a
1431 dash to the first word if it lacks one, and passing the vector to
1435 decode_env_switches (envar
, len
)
1439 char *varref
= (char *) alloca (2 + len
+ 2);
1444 /* Get the variable's value. */
1447 bcopy (envar
, &varref
[2], len
);
1448 varref
[2 + len
] = ')';
1449 varref
[2 + len
+ 1] = '\0';
1450 value
= variable_expand (varref
);
1452 /* Skip whitespace, and check for an empty value. */
1453 value
= next_token (value
);
1454 len
= strlen (value
);
1458 /* Make a copy of the value in ARGS, where we will munge it.
1459 If it does not begin with a dash, prepend one.
1460 We must allocate lasting storage for this (and we never free it) because
1461 decode_switches may save pointers into it for string-valued switches. */
1462 args
= (char *) xmalloc (1 + len
+ 2);
1463 if (value
[0] != '-')
1465 bcopy (value
, value
[0] == '-' ? args
: &args
[1], len
+ 1);
1466 /* Write an extra null terminator so our loop below will
1467 never be in danger of looking past the end of the string. */
1468 args
[(value
[0] == '-' ? 0 : 1) + len
+ 1] = '\0';
1470 /* Allocate a vector that is definitely big enough. */
1471 argv
= (char **) alloca ((1 + len
+ 1) * sizeof (char *));
1473 /* getopt will look at the arguments starting at ARGV[1].
1474 Prepend a spacer word. */
1479 argv
[argc
++] = args
;
1480 args
= end_of_token (args
);
1482 } while (*args
!= '\0');
1485 /* Parse those words. */
1486 decode_switches (argc
, argv
, 1);
1489 /* Define the MAKEFLAGS and MFLAGS variables to reflect the settings of the
1490 command switches. Include options with args if ALL is nonzero.
1491 Don't include options with the `no_makefile' flag set if MAKEFILE. */
1494 define_makeflags (all
, makefile
)
1497 register const struct command_switch
*cs
;
1501 /* We will construct a linked list of `struct flag's describing
1502 all the flags which need to go in MAKEFLAGS. Then, once we
1503 know how many there are and their lengths, we can put them all
1504 together in a string. */
1509 const struct command_switch
*cs
;
1511 unsigned int arglen
;
1513 struct flag
*flags
= 0;
1514 unsigned int flagslen
= 0;
1515 #define ADD_FLAG(ARG, LEN) \
1517 struct flag *new = (struct flag *) alloca (sizeof (struct flag)); \
1520 new->arglen = (LEN); \
1521 new->next = flags; \
1523 if (new->arg == 0) \
1524 ++flagslen; /* Just a single flag letter. */ \
1526 flagslen += 1 + 1 + 1 + 1 + new->arglen; /* " -x foo" */ \
1527 if (!isalnum (cs->c)) \
1528 /* This switch has no single-letter version, so we use the long. */ \
1529 flagslen += 2 + strlen (cs->long_name); \
1532 for (cs
= switches
; cs
->c
!= '\0'; ++cs
)
1533 if (cs
->toenv
&& (!makefile
|| !cs
->no_makefile
))
1544 if (!*(int *) cs
->value_ptr
== (cs
->type
== flag_off
)
1545 && (cs
->default_value
== 0
1546 || *(int *) cs
->value_ptr
!= *(int *) cs
->default_value
))
1553 if ((cs
->default_value
!= 0
1554 && (*(unsigned int *) cs
->value_ptr
1555 == *(unsigned int *) cs
->default_value
)))
1557 else if (cs
->noarg_value
!= 0
1558 && (*(unsigned int *) cs
->value_ptr
==
1559 *(unsigned int *) cs
->noarg_value
))
1560 ADD_FLAG ("", 0); /* Optional value omitted; see below. */
1561 else if (cs
->c
== 'j')
1562 /* Special case for `-j'. */
1566 char *buf
= (char *) alloca (30);
1567 sprintf (buf
, "%u", *(unsigned int *) cs
->value_ptr
);
1568 ADD_FLAG (buf
, strlen (buf
));
1576 if (cs
->default_value
!= 0
1577 && (*(double *) cs
->value_ptr
1578 == *(double *) cs
->default_value
))
1580 else if (cs
->noarg_value
!= 0
1581 && (*(double *) cs
->value_ptr
1582 == *(double *) cs
->noarg_value
))
1583 ADD_FLAG ("", 0); /* Optional value omitted; see below. */
1586 char *buf
= (char *) alloca (100);
1587 sprintf (buf
, "%g", *(double *) cs
->value_ptr
);
1588 ADD_FLAG (buf
, strlen (buf
));
1596 struct stringlist
*sl
= *(struct stringlist
**) cs
->value_ptr
;
1599 /* Add the elements in reverse order, because
1600 all the flags get reversed below; and the order
1601 matters for some switches (like -I). */
1602 register unsigned int i
= sl
->idx
;
1604 ADD_FLAG (sl
->list
[i
], strlen (sl
->list
[i
]));
1613 /* No flags. Use a string of two nulls so [1] works below. */
1617 /* Construct the value in FLAGSTRING.
1618 We allocate enough space for a preceding dash and trailing null. */
1620 flagstring
= (char *) alloca (1 + flagslen
+ 1);
1625 /* Add the flag letter or name to the string. */
1626 if (!isalnum (flags
->cs
->c
))
1629 strcpy (p
, flags
->cs
->long_name
);
1633 *p
++ = flags
->cs
->c
;
1634 if (flags
->arg
!= 0)
1636 /* A flag that takes an optional argument which in this case
1637 is omitted is specified by ARG being "" and ARGLEN being 0.
1638 We must distinguish because a following flag appended without
1639 an intervening " -" is considered the arg for the first. */
1640 if (flags
->arglen
> 0)
1642 /* Add its argument too. */
1643 *p
++ = !isalnum (flags
->cs
->c
) ? '=' : ' ';
1644 bcopy (flags
->arg
, p
, flags
->arglen
);
1647 /* Write a following space and dash, for the next flag. */
1651 else if (!isalnum (flags
->cs
->c
))
1653 /* Long options must each go in their own word,
1654 so we write the following space and dash. */
1658 flags
= flags
->next
;
1659 } while (flags
!= 0);
1662 /* Kill the final space and dash. */
1665 /* Terminate the string. */
1669 v
= define_variable ("MAKEFLAGS", 9,
1670 /* On Sun, the value of MFLAGS starts with a `-' but
1671 the value of MAKEFLAGS lacks the `-'.
1672 Be compatible with this unless FLAGSTRING starts
1673 with a long option `--foo', since removing the
1674 first dash would result in the bogus `-foo'. */
1675 flagstring
[1] == '-' ? flagstring
: &flagstring
[1],
1676 /* This used to use o_env, but that lost when a
1677 makefile defined MAKEFLAGS. Makefiles set
1678 MAKEFLAGS to add switches, but we still want
1679 to redefine its value with the full set of
1680 switches. Of course, an override or command
1681 definition will still take precedence. */
1684 /* The first time we are called, set MAKEFLAGS to always be exported.
1685 We should not do this again on the second call, because that is
1686 after reading makefiles which might have done `unexport MAKEFLAGS'. */
1687 v
->export
= v_export
;
1688 /* Since MFLAGS is not parsed for flags, there is no reason to
1689 override any makefile redefinition. */
1690 (void) define_variable ("MFLAGS", 6, flagstring
, o_env
, 0);
1693 /* Print version information. */
1698 static int printed_version
= 0;
1700 char *precede
= print_data_base_flag
? "# " : "";
1702 if (printed_version
)
1703 /* Do it only once. */
1706 printf ("%sGNU Make version %s", precede
, version_string
);
1707 if (remote_description
!= 0 && *remote_description
!= '\0')
1708 printf ("-%s", remote_description
);
1710 printf (", by Richard Stallman and Roland McGrath.\n\
1711 %sCopyright (C) 1988, 89, 90, 91, 92, 93, 94 Free Software Foundation, Inc.\n\
1712 %sThis is free software; see the source for copying conditions.\n\
1713 %sThere is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A\n\
1714 %sPARTICULAR PURPOSE.\n\n", precede
, precede
, precede
, precede
);
1716 printed_version
= 1;
1718 /* Flush stdout so the user doesn't have to wait to see the
1719 version information while things are thought about. */
1723 /* Print a bunch of information about this and that. */
1728 extern char *ctime ();
1731 when
= time ((time_t *) 0);
1732 printf ("\n# Make data base, printed on %s", ctime (&when
));
1734 print_variable_data_base ();
1735 print_dir_data_base ();
1736 print_rule_data_base ();
1737 print_file_data_base ();
1738 print_vpath_data_base ();
1740 when
= time ((time_t *) 0);
1741 printf ("\n# Finished Make data base on %s\n", ctime (&when
));
1744 /* Exit with STATUS, cleaning up as necessary. */
1750 static char dying
= 0;
1758 if (print_version_flag
)
1761 /* Wait for children to die. */
1762 for (err
= status
!= 0; job_slots_used
> 0; err
= 0)
1763 reap_children (1, err
);
1765 /* Remove the intermediate files. */
1766 remove_intermediates (0);
1768 if (print_data_base_flag
)
1771 if (print_directory_flag
)
1772 log_working_directory (0);
1778 /* Write a message indicating that we've just entered or
1779 left (according to ENTERING) the current directory. */
1782 log_working_directory (entering
)
1785 static int entered
= 0;
1786 char *message
= entering
? "Entering" : "Leaving";
1791 /* Don't print the leaving message if we
1792 haven't printed the entering message. */
1795 if (print_data_base_flag
)
1796 fputs ("# ", stdout
);
1799 printf ("%s: %s ", program
, message
);
1801 printf ("%s[%u]: %s ", program
, makelevel
, message
);
1803 if (starting_directory
== 0)
1804 puts ("an unknown directory");
1806 printf ("directory `%s'\n", starting_directory
);