1 /* Argument parsing and main program of GNU Make.
2 Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
3 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free
4 Software Foundation, Inc.
5 This file is part of GNU Make.
7 GNU Make is free software; you can redistribute it and/or modify it under the
8 terms of the GNU General Public License as published by the Free Software
9 Foundation; either version 3 of the License, or (at your option) any later
12 GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
14 A PARTICULAR PURPOSE. See the GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License along with
17 this program. If not, see <http://www.gnu.org/licenses/>. */
32 # include <proto/dos.h>
37 #include "pathstuff.h"
40 # include <sys/types.h>
41 # include <sys/wait.h>
48 int __stack
= 20000; /* Make sure we have 20K of stack space */
52 void remote_setup (void);
53 void remote_cleanup (void);
54 RETSIGTYPE
fatal_error_signal (int sig
);
56 void print_variable_data_base (void);
57 void print_dir_data_base (void);
58 void print_rule_data_base (void);
59 void print_vpath_data_base (void);
61 void verify_file_data_base (void);
63 #if defined HAVE_WAITPID || defined HAVE_WAIT3
64 # define HAVE_WAIT_NOHANG
71 # ifndef sun /* Sun has an incorrect decl in a header. */
72 void exit (int) __attribute__ ((noreturn
));
77 static void clean_jobserver (int status
);
78 static void print_data_base (void);
79 static void print_version (void);
80 static void decode_switches (int argc
, char **argv
, int env
);
81 static void decode_env_switches (char *envar
, unsigned int len
);
82 static const char *define_makeflags (int all
, int makefile
);
83 static char *quote_for_env (char *out
, const char *in
);
84 static void initialize_global_hash_tables (void);
87 /* The structure that describes an accepted command switch. */
91 int c
; /* The switch character. */
93 enum /* Type of the value. */
95 flag
, /* Turn int flag on. */
96 flag_off
, /* Turn int flag off. */
97 string
, /* One string per switch. */
98 filename
, /* A string containing a file name. */
99 positive_int
, /* A positive integer. */
100 floating
, /* A floating-point number (double). */
101 ignore
/* Ignored. */
104 void *value_ptr
; /* Pointer to the value-holding variable. */
106 unsigned int env
:1; /* Can come from MAKEFLAGS. */
107 unsigned int toenv
:1; /* Should be put in MAKEFLAGS. */
108 unsigned int no_makefile
:1; /* Don't propagate when remaking makefiles. */
110 const void *noarg_value
; /* Pointer to value used if no arg given. */
111 const void *default_value
; /* Pointer to default value. */
113 char *long_name
; /* Long option name. */
116 /* True if C is a switch value that corresponds to a short option. */
118 #define short_option(c) ((c) <= CHAR_MAX)
120 /* The structure used to hold the list of strings given
121 in command switches of a type that takes string arguments. */
125 const char **list
; /* Nil-terminated list of strings. */
126 unsigned int idx
; /* Index into above. */
127 unsigned int max
; /* Number of pointers allocated. */
131 /* The recognized command switches. */
133 /* Nonzero means do not print commands to be executed (-s). */
137 /* Nonzero means just touch the files
138 that would appear to need remaking (-t) */
142 /* Nonzero means just print what commands would need to be executed,
143 don't actually execute them (-n). */
147 /* Print debugging info (--debug). */
149 static struct stringlist
*db_flags
;
150 static int debug_flag
= 0;
154 /* Output level (--verbosity). */
156 static struct stringlist
*verbosity_flags
;
159 /* Suspend make in main for a short time to allow debugger to attach */
161 int suspend_flag
= 0;
164 /* Environment variables override makefile definitions. */
166 int env_overrides
= 0;
168 /* Nonzero means ignore status codes returned by commands
169 executed to remake files. Just treat them all as successful (-i). */
171 int ignore_errors_flag
= 0;
173 /* Nonzero means don't remake anything, just print the data base
174 that results from reading the makefile (-p). */
176 int print_data_base_flag
= 0;
178 /* Nonzero means don't remake anything; just return a nonzero status
179 if the specified targets are not up to date (-q). */
181 int question_flag
= 0;
183 /* Nonzero means do not use any of the builtin rules (-r) / variables (-R). */
185 int no_builtin_rules_flag
= 0;
186 int no_builtin_variables_flag
= 0;
188 /* Nonzero means keep going even if remaking some file fails (-k). */
191 int default_keep_going_flag
= 0;
193 /* Nonzero means check symlink mtimes. */
195 int check_symlink_flag
= 0;
197 /* Nonzero means print directory before starting and when done (-w). */
199 int print_directory_flag
= 0;
201 /* Nonzero means ignore print_directory_flag and never print the directory.
202 This is necessary because print_directory_flag is set implicitly. */
204 int inhibit_print_directory_flag
= 0;
206 /* Nonzero means print version information. */
208 int print_version_flag
= 0;
210 /* List of makefiles given with -f switches. */
212 static struct stringlist
*makefiles
= 0;
214 /* Size of the stack when we started. */
216 #ifdef SET_STACK_SIZE
217 struct rlimit stack_limit
;
221 /* Number of job slots (commands that can be run at once). */
223 unsigned int job_slots
= 1;
224 unsigned int default_job_slots
= 1;
225 static unsigned int master_job_slots
= 0;
227 /* Value of job_slots that means no limit. */
229 static unsigned int inf_jobs
= 0;
231 /* File descriptors for the jobs pipe. */
233 static struct stringlist
*jobserver_fds
= 0;
235 int job_fds
[2] = { -1, -1 };
238 /* Maximum load average at which multiple jobs will be run.
239 Negative values mean unlimited, while zero means limit to
240 zero load (which could be useful to start infinite jobs remotely
241 but one at a time locally). */
243 double max_load_average
= -1.0;
244 double default_load_average
= -1.0;
246 int max_load_average
= -1;
247 int default_load_average
= -1;
250 /* List of directories given with -C switches. */
252 static struct stringlist
*directories
= 0;
254 /* List of include directories given with -I switches. */
256 static struct stringlist
*include_directories
= 0;
258 /* List of files given with -o switches. */
260 static struct stringlist
*old_files
= 0;
262 /* List of files given with -W switches. */
264 static struct stringlist
*new_files
= 0;
266 /* List of strings to be eval'd. */
267 static struct stringlist
*eval_strings
= 0;
269 /* If nonzero, we should just print usage and exit. */
271 static int print_usage_flag
= 0;
273 /* If nonzero, we should print a warning message
274 for each reference to an undefined variable. */
276 int warn_undefined_variables_flag
;
278 /* If nonzero, always build all targets, regardless of whether
279 they appear out of date or not. */
281 static int always_make_set
= 0;
282 int always_make_flag
= 0;
284 /* If nonzero, we're in the "try to rebuild makefiles" phase. */
286 int rebuilding_makefiles
= 0;
288 /* Remember the original value of the SHELL variable, from the environment. */
290 struct variable shell_var
;
292 /* This character introduces a command: it's the first char on the line. */
294 char cmd_prefix
= '\t';
297 /* The usage output. We write it this way to make life easier for the
298 translators, especially those trying to translate to right-to-left
299 languages like Hebrew. */
301 static const char *const usage
[] =
305 -b, -m Ignored for compatibility.\n"),
307 -B, --always-make Unconditionally make all targets.\n"),
309 -C DIRECTORY, --directory=DIRECTORY\n\
310 Change to DIRECTORY before doing anything.\n"),
312 -d Print lots of debugging information.\n"),
314 --debug[=FLAGS] Print various types of debugging information.\n"),
316 -e, --environment-overrides\n\
317 Environment variables override makefiles.\n"),
319 --eval=STRING Evaluate STRING as a makefile statement.\n"),
321 -f FILE, --file=FILE, --makefile=FILE\n\
322 Read FILE as a makefile.\n"),
324 -h, --help Print this message and exit.\n"),
326 -i, --ignore-errors Ignore errors from recipes.\n"),
328 -I DIRECTORY, --include-dir=DIRECTORY\n\
329 Search DIRECTORY for included makefiles.\n"),
331 -j [N], --jobs[=N] Allow N jobs at once; infinite jobs with no arg.\n"),
333 -k, --keep-going Keep going when some targets can't be made.\n"),
335 -l [N], --load-average[=N], --max-load[=N]\n\
336 Don't start multiple jobs unless load is below N.\n"),
338 -L, --check-symlink-times Use the latest mtime between symlinks and target.\n"),
340 -n, --just-print, --dry-run, --recon\n\
341 Don't actually run any recipe; just print them.\n"),
343 -o FILE, --old-file=FILE, --assume-old=FILE\n\
344 Consider FILE to be very old and don't remake it.\n"),
346 -p, --print-data-base Print make's internal database.\n"),
348 -q, --question Run no recipe; exit status says if up to date.\n"),
350 -r, --no-builtin-rules Disable the built-in implicit rules.\n"),
352 -R, --no-builtin-variables Disable the built-in variable settings.\n"),
354 -s, --silent, --quiet Don't echo recipes.\n"),
356 -S, --no-keep-going, --stop\n\
359 -t, --touch Touch targets instead of remaking them.\n"),
361 -v, --version Print the version number of make and exit.\n"),
363 -w, --print-directory Print the current directory.\n"),
365 --no-print-directory Turn off -w, even if it was turned on implicitly.\n"),
367 -W FILE, --what-if=FILE, --new-file=FILE, --assume-new=FILE\n\
368 Consider FILE to be infinitely new.\n"),
370 --warn-undefined-variables Warn when an undefined variable is referenced.\n"),
374 /* The table of command switches. */
376 static const struct command_switch switches
[] =
378 { 'b', ignore
, 0, 0, 0, 0, 0, 0, 0 },
379 { 'B', flag
, &always_make_set
, 1, 1, 0, 0, 0, "always-make" },
380 { 'C', filename
, &directories
, 0, 0, 0, 0, 0, "directory" },
381 { 'd', flag
, &debug_flag
, 1, 1, 0, 0, 0, 0 },
382 { CHAR_MAX
+1, string
, &db_flags
, 1, 1, 0, "basic", 0, "debug" },
384 { 'D', flag
, &suspend_flag
, 1, 1, 0, 0, 0, "suspend-for-debug" },
386 { 'e', flag
, &env_overrides
, 1, 1, 0, 0, 0, "environment-overrides", },
387 { 'f', filename
, &makefiles
, 0, 0, 0, 0, 0, "file" },
388 { 'h', flag
, &print_usage_flag
, 0, 0, 0, 0, 0, "help" },
389 { 'i', flag
, &ignore_errors_flag
, 1, 1, 0, 0, 0, "ignore-errors" },
390 { 'I', filename
, &include_directories
, 1, 1, 0, 0, 0,
392 { 'j', positive_int
, &job_slots
, 1, 1, 0, &inf_jobs
, &default_job_slots
,
394 { CHAR_MAX
+2, string
, &jobserver_fds
, 1, 1, 0, 0, 0, "jobserver-fds" },
395 { 'k', flag
, &keep_going_flag
, 1, 1, 0, 0, &default_keep_going_flag
,
398 { 'l', floating
, &max_load_average
, 1, 1, 0, &default_load_average
,
399 &default_load_average
, "load-average" },
401 { 'l', positive_int
, &max_load_average
, 1, 1, 0, &default_load_average
,
402 &default_load_average
, "load-average" },
404 { 'L', flag
, &check_symlink_flag
, 1, 1, 0, 0, 0, "check-symlink-times" },
405 { 'm', ignore
, 0, 0, 0, 0, 0, 0, 0 },
406 { 'n', flag
, &just_print_flag
, 1, 1, 1, 0, 0, "just-print" },
407 { 'o', filename
, &old_files
, 0, 0, 0, 0, 0, "old-file" },
408 { 'p', flag
, &print_data_base_flag
, 1, 1, 0, 0, 0, "print-data-base" },
409 { 'q', flag
, &question_flag
, 1, 1, 1, 0, 0, "question" },
410 { 'r', flag
, &no_builtin_rules_flag
, 1, 1, 0, 0, 0, "no-builtin-rules" },
411 { 'R', flag
, &no_builtin_variables_flag
, 1, 1, 0, 0, 0,
412 "no-builtin-variables" },
413 { 's', flag
, &silent_flag
, 1, 1, 0, 0, 0, "silent" },
414 { 'S', flag_off
, &keep_going_flag
, 1, 1, 0, 0, &default_keep_going_flag
,
416 { 't', flag
, &touch_flag
, 1, 1, 1, 0, 0, "touch" },
417 { 'v', flag
, &print_version_flag
, 1, 1, 0, 0, 0, "version" },
418 { CHAR_MAX
+3, string
, &verbosity_flags
, 1, 1, 0, 0, 0,
420 { 'w', flag
, &print_directory_flag
, 1, 1, 0, 0, 0, "print-directory" },
421 { CHAR_MAX
+4, flag
, &inhibit_print_directory_flag
, 1, 1, 0, 0, 0,
422 "no-print-directory" },
423 { 'W', filename
, &new_files
, 0, 0, 0, 0, 0, "what-if" },
424 { CHAR_MAX
+5, flag
, &warn_undefined_variables_flag
, 1, 1, 0, 0, 0,
425 "warn-undefined-variables" },
426 { CHAR_MAX
+6, string
, &eval_strings
, 1, 0, 0, 0, 0, "eval" },
427 { 0, 0, 0, 0, 0, 0, 0, 0, 0 }
430 /* Secondary long names for options. */
432 static struct option long_option_aliases
[] =
434 { "quiet", no_argument
, 0, 's' },
435 { "stop", no_argument
, 0, 'S' },
436 { "new-file", required_argument
, 0, 'W' },
437 { "assume-new", required_argument
, 0, 'W' },
438 { "assume-old", required_argument
, 0, 'o' },
439 { "max-load", optional_argument
, 0, 'l' },
440 { "dry-run", no_argument
, 0, 'n' },
441 { "recon", no_argument
, 0, 'n' },
442 { "makefile", required_argument
, 0, 'f' },
445 /* List of goal targets. */
447 static struct dep
*goals
, *lastgoal
;
449 /* List of variables which were defined on the command line
450 (or, equivalently, in MAKEFLAGS). */
452 struct command_variable
454 struct command_variable
*next
;
455 struct variable
*variable
;
457 static struct command_variable
*command_variables
;
459 /* The name we were invoked with. */
463 /* Our current directory before processing any -C options. */
465 char *directory_before_chdir
;
467 /* Our current directory after processing all -C options. */
469 char *starting_directory
;
471 /* Value of the MAKELEVEL variable at startup (or 0). */
473 unsigned int makelevel
;
475 /* Pointer to the value of the .DEFAULT_GOAL special variable.
476 The value will be the name of the goal to remake if the command line
477 does not override it. It can be set by the makefile, or else it's
478 the first target defined in the makefile whose name does not start
481 struct variable
* default_goal_var
;
483 /* Pointer to structure for the file .DEFAULT
484 whose commands are used for any file that has none of its own.
485 This is zero if the makefiles do not define .DEFAULT. */
487 struct file
*default_file
;
489 /* Nonzero if we have seen the magic `.POSIX' target.
490 This turns on pedantic compliance with POSIX.2. */
494 /* Nonzero if we have seen the '.SECONDEXPANSION' target.
495 This turns on secondary expansion of prerequisites. */
497 int second_expansion
;
499 /* Nonzero if we have seen the `.NOTPARALLEL' target.
500 This turns off parallel builds for this invocation of make. */
504 /* Nonzero if some rule detected clock skew; we keep track so (a) we only
505 print one warning about it during the run, and (b) we can print a final
506 warning at the end of the run. */
508 int clock_skew_detected
;
510 /* Mask of signals that are being caught with fatal_error_signal. */
513 sigset_t fatal_signal_set
;
515 # ifdef HAVE_SIGSETMASK
516 int fatal_signal_mask
;
520 #if !defined HAVE_BSD_SIGNAL && !defined bsd_signal
521 # if !defined HAVE_SIGACTION
522 # define bsd_signal signal
524 typedef RETSIGTYPE (*bsd_signal_ret_t
) (int);
526 static bsd_signal_ret_t
527 bsd_signal (int sig
, bsd_signal_ret_t func
)
529 struct sigaction act
, oact
;
530 act
.sa_handler
= func
;
531 act
.sa_flags
= SA_RESTART
;
532 sigemptyset (&act
.sa_mask
);
533 sigaddset (&act
.sa_mask
, sig
);
534 if (sigaction (sig
, &act
, &oact
) != 0)
536 return oact
.sa_handler
;
542 initialize_global_hash_tables (void)
544 init_hash_global_variable_set ();
547 hash_init_directories ();
548 hash_init_function_table ();
552 expand_command_line_file (char *name
)
558 fatal (NILF
, _("empty string invalid as file name"));
562 expanded
= tilde_expand (name
);
567 /* This is also done in parse_file_seq, so this is redundant
568 for names read from makefiles. It is here for names passed
569 on the command line. */
570 while (name
[0] == '.' && name
[1] == '/' && name
[2] != '\0')
574 /* Skip following slashes: ".//foo" is "foo", not "/foo". */
580 /* It was all slashes! Move back to the dot and truncate
581 it after the first slash, so it becomes just "./". */
584 while (name
[0] != '.');
588 cp
= strcache_add (name
);
596 /* Toggle -d on receipt of SIGUSR1. */
600 debug_signal_handler (int sig UNUSED
)
602 db_level
= db_level
? DB_NONE
: DB_BASIC
;
607 decode_debug_flags (void)
617 for (pp
=db_flags
->list
; *pp
; ++pp
)
623 switch (tolower (p
[0]))
629 db_level
|= DB_BASIC
;
632 db_level
|= DB_BASIC
| DB_IMPLICIT
;
638 db_level
|= DB_BASIC
| DB_MAKEFILES
;
641 db_level
|= DB_BASIC
| DB_VERBOSE
;
644 fatal (NILF
, _("unknown debug level specification `%s'"), p
);
647 while (*(++p
) != '\0')
648 if (*p
== ',' || *p
== ' ')
661 * HANDLE runtime exceptions by avoiding a requestor on the GUI. Capture
662 * exception and print it to stderr instead.
664 * If ! DB_VERBOSE, just print a simple message and exit.
665 * If DB_VERBOSE, print a more verbose message.
666 * If compiled for DEBUG, let exception pass through to GUI so that
667 * debuggers can attach.
670 handle_runtime_exceptions( struct _EXCEPTION_POINTERS
*exinfo
)
672 PEXCEPTION_RECORD exrec
= exinfo
->ExceptionRecord
;
673 LPSTR cmdline
= GetCommandLine();
674 LPSTR prg
= strtok(cmdline
, " ");
678 LPTSTR lpszStrings
[1];
681 if (! ISDB (DB_VERBOSE
))
684 _("%s: Interrupt/Exception caught (code = 0x%lx, addr = 0x%lx)\n"),
685 prg
, exrec
->ExceptionCode
, (DWORD
)exrec
->ExceptionAddress
);
686 fprintf(stderr
, errmsg
);
691 _("\nUnhandled exception filter called from program %s\nExceptionCode = %lx\nExceptionFlags = %lx\nExceptionAddress = %lx\n"),
692 prg
, exrec
->ExceptionCode
, exrec
->ExceptionFlags
,
693 (DWORD
)exrec
->ExceptionAddress
);
695 if (exrec
->ExceptionCode
== EXCEPTION_ACCESS_VIOLATION
696 && exrec
->NumberParameters
>= 2)
697 sprintf(&errmsg
[strlen(errmsg
)],
698 (exrec
->ExceptionInformation
[0]
699 ? _("Access violation: write operation at address %lx\n")
700 : _("Access violation: read operation at address %lx\n")),
701 exrec
->ExceptionInformation
[1]);
703 /* turn this on if we want to put stuff in the event log too */
705 hEventSource
= RegisterEventSource(NULL
, "GNU Make");
706 lpszStrings
[0] = errmsg
;
708 if (hEventSource
!= NULL
)
710 ReportEvent(hEventSource
, /* handle of event source */
711 EVENTLOG_ERROR_TYPE
, /* event type */
712 0, /* event category */
714 NULL
, /* current user's SID */
715 1, /* strings in lpszStrings */
716 0, /* no bytes of raw data */
717 lpszStrings
, /* array of error strings */
718 NULL
); /* no raw data */
720 (VOID
) DeregisterEventSource(hEventSource
);
724 /* Write the error to stderr too */
725 fprintf(stderr
, errmsg
);
728 return EXCEPTION_CONTINUE_SEARCH
;
731 return (255); /* not reached */
736 * On WIN32 systems we don't have the luxury of a /bin directory that
737 * is mapped globally to every drive mounted to the system. Since make could
738 * be invoked from any drive, and we don't want to propogate /bin/sh
739 * to every single drive. Allow ourselves a chance to search for
740 * a value for default shell here (if the default path does not exist).
744 find_and_set_default_shell (const char *token
)
751 extern char *default_shell
;
754 search_token
= default_shell
;
756 atoken
= search_token
= xstrdup (token
);
758 /* If the user explicitly requests the DOS cmd shell, obey that request.
759 However, make sure that's what they really want by requiring the value
760 of SHELL either equal, or have a final path element of, "cmd" or
761 "cmd.exe" case-insensitive. */
762 tokend
= search_token
+ strlen (search_token
) - 3;
763 if (((tokend
== search_token
764 || (tokend
> search_token
765 && (tokend
[-1] == '/' || tokend
[-1] == '\\')))
766 && !strcasecmp (tokend
, "cmd"))
767 || ((tokend
- 4 == search_token
768 || (tokend
- 4 > search_token
769 && (tokend
[-5] == '/' || tokend
[-5] == '\\')))
770 && !strcasecmp (tokend
- 4, "cmd.exe"))) {
771 batch_mode_shell
= 1;
773 sprintf (sh_path
, "%s", search_token
);
774 default_shell
= xstrdup (w32ify (sh_path
, 0));
775 DB (DB_VERBOSE
, (_("find_and_set_shell() setting default_shell = %s\n"),
778 } else if (!no_default_sh_exe
&&
779 (token
== NULL
|| !strcmp (search_token
, default_shell
))) {
780 /* no new information, path already set or known */
782 } else if (file_exists_p (search_token
)) {
783 /* search token path was found */
784 sprintf (sh_path
, "%s", search_token
);
785 default_shell
= xstrdup (w32ify (sh_path
, 0));
786 DB (DB_VERBOSE
, (_("find_and_set_shell() setting default_shell = %s\n"),
791 struct variable
*v
= lookup_variable (STRING_SIZE_TUPLE ("PATH"));
793 /* Search Path for shell */
798 ep
= strchr (p
, PATH_SEPARATOR_CHAR
);
803 if (dir_file_exists_p (p
, search_token
)) {
804 sprintf (sh_path
, "%s/%s", p
, search_token
);
805 default_shell
= xstrdup (w32ify (sh_path
, 0));
807 *ep
= PATH_SEPARATOR_CHAR
;
812 *ep
= PATH_SEPARATOR_CHAR
;
816 ep
= strchr (p
, PATH_SEPARATOR_CHAR
);
819 /* be sure to check last element of Path */
820 if (p
&& *p
&& dir_file_exists_p (p
, search_token
)) {
821 sprintf (sh_path
, "%s/%s", p
, search_token
);
822 default_shell
= xstrdup (w32ify (sh_path
, 0));
828 (_("find_and_set_shell() path search set default_shell = %s\n"),
834 if (!unixy_shell
&& sh_found
&&
835 (strstr (default_shell
, "sh") || strstr (default_shell
, "SH"))) {
837 batch_mode_shell
= 0;
840 #ifdef BATCH_MODE_ONLY_SHELL
841 batch_mode_shell
= 1;
849 #endif /* WINDOWS32 */
853 msdos_return_to_initial_directory (void)
855 if (directory_before_chdir
)
856 chdir (directory_before_chdir
);
858 #endif /* __MSDOS__ */
860 char *mktemp (char *template);
861 int mkstemp (char *template);
864 open_tmpfile(char **name
, const char *template)
870 #if defined HAVE_MKSTEMP || defined HAVE_MKTEMP
871 # define TEMPLATE_LEN strlen (template)
873 # define TEMPLATE_LEN L_tmpnam
875 *name
= xmalloc (TEMPLATE_LEN
+ 1);
876 strcpy (*name
, template);
878 #if defined HAVE_MKSTEMP && defined HAVE_FDOPEN
879 /* It's safest to use mkstemp(), if we can. */
880 fd
= mkstemp (*name
);
883 return fdopen (fd
, "w");
886 (void) mktemp (*name
);
888 (void) tmpnam (*name
);
892 /* Can't use mkstemp(), but guard against a race condition. */
893 fd
= open (*name
, O_CREAT
|O_EXCL
|O_WRONLY
, 0600);
896 return fdopen (fd
, "w");
898 /* Not secure, but what can we do? */
899 return fopen (*name
, "w");
907 main (int argc
, char **argv
)
910 main (int argc
, char **argv
, char **envp
)
913 static char *stdin_nm
= 0;
914 int makefile_status
= MAKE_SUCCESS
;
915 struct dep
*read_makefiles
;
916 PATH_VAR (current_directory
);
917 unsigned int restarts
= 0;
919 char *unix_path
= NULL
;
920 char *windows32_path
= NULL
;
922 SetUnhandledExceptionFilter(handle_runtime_exceptions
);
924 /* start off assuming we have no shell */
926 no_default_sh_exe
= 1;
929 #ifdef SET_STACK_SIZE
930 /* Get rid of any avoidable limit on stack size. */
934 /* Set the stack limit huge so that alloca does not fail. */
935 if (getrlimit (RLIMIT_STACK
, &rlim
) == 0
936 && rlim
.rlim_cur
> 0 && rlim
.rlim_cur
< rlim
.rlim_max
)
939 rlim
.rlim_cur
= rlim
.rlim_max
;
940 setrlimit (RLIMIT_STACK
, &rlim
);
943 stack_limit
.rlim_cur
= 0;
948 atexit (close_stdout
);
951 /* Needed for OS/2 */
952 initialize_main(&argc
, &argv
);
956 #if defined (__MSDOS__) && !defined (_POSIX_SOURCE)
957 /* Request the most powerful version of `system', to
958 make up for the dumb default shell. */
959 __system_flags
= (__system_redirect
961 | __system_allow_multiple_cmds
962 | __system_allow_long_cmds
963 | __system_handle_null_commands
964 | __system_emulate_chdir
);
968 /* Set up gettext/internationalization support. */
969 setlocale (LC_ALL
, "");
970 bindtextdomain (PACKAGE
, LOCALEDIR
);
971 textdomain (PACKAGE
);
974 sigemptyset (&fatal_signal_set
);
975 #define ADD_SIG(sig) sigaddset (&fatal_signal_set, sig)
977 #ifdef HAVE_SIGSETMASK
978 fatal_signal_mask
= 0;
979 #define ADD_SIG(sig) fatal_signal_mask |= sigmask (sig)
985 #define FATAL_SIG(sig) \
986 if (bsd_signal (sig, fatal_error_signal) == SIG_IGN) \
987 bsd_signal (sig, SIG_IGN); \
1001 /* Windows 9X delivers FP exceptions in child programs to their
1002 parent! We don't want Make to die when a child divides by zero,
1003 so we work around that lossage by catching SIGFPE. */
1008 FATAL_SIG (SIGDANGER
);
1011 FATAL_SIG (SIGXCPU
);
1014 FATAL_SIG (SIGXFSZ
);
1019 /* Do not ignore the child-death signal. This must be done before
1020 any children could possibly be created; otherwise, the wait
1021 functions won't work on systems with the SVR4 ECHILD brain
1022 damage, if our invoker is ignoring this signal. */
1024 #ifdef HAVE_WAIT_NOHANG
1025 # if defined SIGCHLD
1026 (void) bsd_signal (SIGCHLD
, SIG_DFL
);
1028 # if defined SIGCLD && SIGCLD != SIGCHLD
1029 (void) bsd_signal (SIGCLD
, SIG_DFL
);
1033 /* Make sure stdout is line-buffered. */
1036 # ifdef SETVBUF_REVERSED
1037 setvbuf (stdout
, _IOLBF
, xmalloc (BUFSIZ
), BUFSIZ
);
1038 # else /* setvbuf not reversed. */
1039 /* Some buggy systems lose if we pass 0 instead of allocating ourselves. */
1040 setvbuf (stdout
, 0, _IOLBF
, BUFSIZ
);
1041 # endif /* setvbuf reversed. */
1042 #elif HAVE_SETLINEBUF
1043 setlinebuf (stdout
);
1044 #endif /* setlinebuf missing. */
1046 /* Figure out where this program lives. */
1050 if (argv
[0][0] == '\0')
1055 program
= strrchr (argv
[0], ']');
1057 program
= strrchr (argv
[0], '/');
1059 #if defined(__MSDOS__) || defined(__EMX__)
1061 program
= strrchr (argv
[0], '\\');
1064 /* Some weird environments might pass us argv[0] with
1065 both kinds of slashes; we must find the rightmost. */
1066 char *p
= strrchr (argv
[0], '\\');
1067 if (p
&& p
> program
)
1070 if (program
== 0 && argv
[0][1] == ':')
1071 program
= argv
[0] + 1;
1076 /* Extract program from full path */
1078 program
= strrchr (argv
[0], '\\');
1081 argv0_len
= strlen(program
);
1082 if (argv0_len
> 4 && streq (&program
[argv0_len
- 4], ".exe"))
1083 /* Remove .exe extension */
1084 program
[argv0_len
- 4] = '\0';
1094 /* Set up to access user data (files). */
1097 initialize_global_hash_tables ();
1099 /* Figure out where we are. */
1102 if (getcwd_fs (current_directory
, GET_PATH_MAX
) == 0)
1104 if (getcwd (current_directory
, GET_PATH_MAX
) == 0)
1108 perror_with_name ("getcwd", "");
1110 error (NILF
, "getwd: %s", current_directory
);
1112 current_directory
[0] = '\0';
1113 directory_before_chdir
= 0;
1116 directory_before_chdir
= xstrdup (current_directory
);
1118 /* Make sure we will return to the initial directory, come what may. */
1119 atexit (msdos_return_to_initial_directory
);
1122 /* Initialize the special variables. */
1123 define_variable_cname (".VARIABLES", "", o_default
, 0)->special
= 1;
1124 /* define_variable_cname (".TARGETS", "", o_default, 0)->special = 1; */
1125 define_variable_cname (".RECIPEPREFIX", "", o_default
, 0)->special
= 1;
1126 define_variable_cname (".SHELLFLAGS", "-c", o_default
, 0);
1129 We must do this in multiple calls because define_variable_cname() is
1130 a macro and some compilers (MSVC) don't like conditionals in macros. */
1132 const char *features
= "target-specific order-only second-expansion"
1133 " else-if shortest-stem undefine"
1137 #ifdef MAKE_JOBSERVER
1140 #ifdef MAKE_SYMLINKS
1145 define_variable_cname (".FEATURES", features
, o_default
, 0);
1148 /* Read in variables from the environment. It is important that this be
1149 done before $(MAKE) is figured out so its definitions will not be
1150 from the environment. */
1156 for (i
= 0; envp
[i
] != 0; ++i
)
1158 int do_not_define
= 0;
1161 while (*ep
!= '\0' && *ep
!= '=')
1164 if (!unix_path
&& strneq(envp
[i
], "PATH=", 5))
1166 else if (!strnicmp(envp
[i
], "Path=", 5)) {
1167 do_not_define
= 1; /* it gets defined after loop exits */
1168 if (!windows32_path
)
1169 windows32_path
= ep
+1;
1172 /* The result of pointer arithmetic is cast to unsigned int for
1173 machines where ptrdiff_t is a different size that doesn't widen
1179 v
= define_variable (envp
[i
], (unsigned int) (ep
- envp
[i
]),
1181 /* Force exportation of every variable culled from the
1182 environment. We used to rely on target_environment's
1183 v_default code to do this. But that does not work for the
1184 case where an environment variable is redefined in a makefile
1185 with `override'; it should then still be exported, because it
1186 was originally in the environment. */
1187 v
->export
= v_export
;
1189 /* Another wrinkle is that POSIX says the value of SHELL set in
1190 the makefile won't change the value of SHELL given to
1192 if (streq (v
->name
, "SHELL"))
1195 v
->export
= v_noexport
;
1197 shell_var
.name
= "SHELL";
1198 shell_var
.length
= 5;
1199 shell_var
.value
= xstrdup (ep
+ 1);
1202 /* If MAKE_RESTARTS is set, remember it but don't export it. */
1203 if (streq (v
->name
, "MAKE_RESTARTS"))
1205 v
->export
= v_noexport
;
1206 restarts
= (unsigned int) atoi (ep
+ 1);
1212 /* If we didn't find a correctly spelled PATH we define PATH as
1213 * either the first mispelled value or an empty string
1216 define_variable_cname ("PATH", windows32_path
? windows32_path
: "",
1217 o_env
, 1)->export
= v_export
;
1219 #else /* For Amiga, read the ENV: device, ignoring all dirs */
1221 BPTR env
, file
, old
;
1224 __aligned
struct FileInfoBlock fib
;
1226 env
= Lock ("ENV:", ACCESS_READ
);
1229 old
= CurrentDir (DupLock(env
));
1230 Examine (env
, &fib
);
1232 while (ExNext (env
, &fib
))
1234 if (fib
.fib_DirEntryType
< 0) /* File */
1236 /* Define an empty variable. It will be filled in
1237 variable_lookup(). Makes startup quite a bit
1239 define_variable (fib
.fib_FileName
,
1240 strlen (fib
.fib_FileName
),
1241 "", o_env
, 1)->export
= v_export
;
1245 UnLock(CurrentDir(old
));
1250 /* Decode the switches. */
1252 decode_env_switches (STRING_SIZE_TUPLE ("MAKEFLAGS"));
1254 /* People write things like:
1255 MFLAGS="CC=gcc -pipe" "CFLAGS=-g"
1256 and we set the -p, -i and -e switches. Doesn't seem quite right. */
1257 decode_env_switches (STRING_SIZE_TUPLE ("MFLAGS"));
1260 decode_switches (argc
, argv
, 0);
1264 fprintf(stderr
, "%s (pid = %ld)\n", argv
[0], GetCurrentProcessId());
1265 fprintf(stderr
, _("%s is suspending for 30 seconds..."), argv
[0]);
1267 fprintf(stderr
, _("done sleep(30). Continuing.\n"));
1271 decode_debug_flags ();
1273 /* Set always_make_flag if -B was given and we've not restarted already. */
1274 always_make_flag
= always_make_set
&& (restarts
== 0);
1276 /* Print version information. */
1277 if (print_version_flag
|| print_data_base_flag
|| db_level
)
1281 /* `make --version' is supposed to just print the version and exit. */
1282 if (print_version_flag
)
1287 /* Set the "MAKE_COMMAND" variable to the name we were invoked with.
1288 (If it is a relative pathname with a slash, prepend our directory name
1289 so the result will run the same program regardless of the current dir.
1290 If it is a name with no slash, we can only hope that PATH did not
1291 find it in the current directory.) */
1294 * Convert from backslashes to forward slashes for
1295 * programs like sh which don't like them. Shouldn't
1296 * matter if the path is one way or the other for
1299 if (strpbrk(argv
[0], "/:\\") ||
1300 strstr(argv
[0], "..") ||
1301 strneq(argv
[0], "//", 2))
1302 argv
[0] = xstrdup(w32ify(argv
[0],1));
1303 #else /* WINDOWS32 */
1304 #if defined (__MSDOS__) || defined (__EMX__)
1305 if (strchr (argv
[0], '\\'))
1309 argv
[0] = xstrdup (argv
[0]);
1310 for (p
= argv
[0]; *p
; p
++)
1314 /* If argv[0] is not in absolute form, prepend the current
1315 directory. This can happen when Make is invoked by another DJGPP
1316 program that uses a non-absolute name. */
1317 if (current_directory
[0] != '\0'
1319 && (argv
[0][0] != '/' && (argv
[0][0] == '\0' || argv
[0][1] != ':'))
1321 /* do not prepend cwd if argv[0] contains no '/', e.g. "make" */
1322 && (strchr (argv
[0], '/') != 0 || strchr (argv
[0], '\\') != 0)
1325 argv
[0] = xstrdup (concat (3, current_directory
, "/", argv
[0]));
1326 #else /* !__MSDOS__ */
1327 if (current_directory
[0] != '\0'
1328 && argv
[0] != 0 && argv
[0][0] != '/' && strchr (argv
[0], '/') != 0
1329 #ifdef HAVE_DOS_PATHS
1330 && (argv
[0][0] != '\\' && (!argv
[0][0] || argv
[0][1] != ':'))
1331 && strchr (argv
[0], '\\') != 0
1334 argv
[0] = xstrdup (concat (3, current_directory
, "/", argv
[0]));
1335 #endif /* !__MSDOS__ */
1336 #endif /* WINDOWS32 */
1339 /* The extra indirection through $(MAKE_COMMAND) is done
1340 for hysterical raisins. */
1341 define_variable_cname ("MAKE_COMMAND", argv
[0], o_default
, 0);
1342 define_variable_cname ("MAKE", "$(MAKE_COMMAND)", o_default
, 1);
1344 if (command_variables
!= 0)
1346 struct command_variable
*cv
;
1348 unsigned int len
= 0;
1351 /* Figure out how much space will be taken up by the command-line
1352 variable definitions. */
1353 for (cv
= command_variables
; cv
!= 0; cv
= cv
->next
)
1356 len
+= 2 * strlen (v
->name
);
1360 len
+= 2 * strlen (v
->value
);
1364 /* Now allocate a buffer big enough and fill it. */
1365 p
= value
= alloca (len
);
1366 for (cv
= command_variables
; cv
!= 0; cv
= cv
->next
)
1369 p
= quote_for_env (p
, v
->name
);
1373 p
= quote_for_env (p
, v
->value
);
1376 p
[-1] = '\0'; /* Kill the final space and terminate. */
1378 /* Define an unchangeable variable with a name that no POSIX.2
1379 makefile could validly use for its own variable. */
1380 define_variable_cname ("-*-command-variables-*-", value
, o_automatic
, 0);
1382 /* Define the variable; this will not override any user definition.
1383 Normally a reference to this variable is written into the value of
1384 MAKEFLAGS, allowing the user to override this value to affect the
1385 exported value of MAKEFLAGS. In POSIX-pedantic mode, we cannot
1386 allow the user's setting of MAKEOVERRIDES to affect MAKEFLAGS, so
1387 a reference to this hidden variable is written instead. */
1388 define_variable_cname ("MAKEOVERRIDES", "${-*-command-variables-*-}",
1392 /* If there were -C flags, move ourselves about. */
1393 if (directories
!= 0)
1396 for (i
= 0; directories
->list
[i
] != 0; ++i
)
1398 const char *dir
= directories
->list
[i
];
1400 /* WINDOWS32 chdir() doesn't work if the directory has a trailing '/'
1401 But allow -C/ just in case someone wants that. */
1403 char *p
= dir
+ strlen (dir
) - 1;
1404 while (p
> dir
&& (p
[0] == '/' || p
[0] == '\\'))
1409 if (chdir (dir
) < 0)
1410 pfatal_with_name (dir
);
1416 * THIS BLOCK OF CODE MUST COME AFTER chdir() CALL ABOVE IN ORDER
1417 * TO NOT CONFUSE THE DEPENDENCY CHECKING CODE IN implicit.c.
1419 * The functions in dir.c can incorrectly cache information for "."
1420 * before we have changed directory and this can cause file
1421 * lookups to fail because the current directory (.) was pointing
1422 * at the wrong place when it was first evaluated.
1424 no_default_sh_exe
= !find_and_set_default_shell(NULL
);
1426 #endif /* WINDOWS32 */
1427 /* Figure out the level of recursion. */
1429 struct variable
*v
= lookup_variable (STRING_SIZE_TUPLE (MAKELEVEL_NAME
));
1430 if (v
!= 0 && v
->value
[0] != '\0' && v
->value
[0] != '-')
1431 makelevel
= (unsigned int) atoi (v
->value
);
1436 /* Except under -s, always do -w in sub-makes and under -C. */
1437 if (!silent_flag
&& (directories
!= 0 || makelevel
> 0))
1438 print_directory_flag
= 1;
1440 /* Let the user disable that with --no-print-directory. */
1441 if (inhibit_print_directory_flag
)
1442 print_directory_flag
= 0;
1444 /* If -R was given, set -r too (doesn't make sense otherwise!) */
1445 if (no_builtin_variables_flag
)
1446 no_builtin_rules_flag
= 1;
1448 /* Construct the list of include directories to search. */
1450 construct_include_path (include_directories
== 0
1451 ? 0 : include_directories
->list
);
1453 /* Figure out where we are now, after chdir'ing. */
1454 if (directories
== 0)
1455 /* We didn't move, so we're still in the same place. */
1456 starting_directory
= current_directory
;
1460 if (getcwd_fs (current_directory
, GET_PATH_MAX
) == 0)
1462 if (getcwd (current_directory
, GET_PATH_MAX
) == 0)
1466 perror_with_name ("getcwd", "");
1468 error (NILF
, "getwd: %s", current_directory
);
1470 starting_directory
= 0;
1473 starting_directory
= current_directory
;
1476 define_variable_cname ("CURDIR", current_directory
, o_file
, 0);
1478 /* Read any stdin makefiles into temporary files. */
1483 for (i
= 0; i
< makefiles
->idx
; ++i
)
1484 if (makefiles
->list
[i
][0] == '-' && makefiles
->list
[i
][1] == '\0')
1486 /* This makefile is standard input. Since we may re-exec
1487 and thus re-read the makefiles, we read standard input
1488 into a temporary file and read from that. */
1490 char *template, *tmpdir
;
1493 fatal (NILF
, _("Makefile from standard input specified twice."));
1496 # define DEFAULT_TMPDIR "sys$scratch:"
1499 # define DEFAULT_TMPDIR P_tmpdir
1501 # define DEFAULT_TMPDIR "/tmp"
1504 #define DEFAULT_TMPFILE "GmXXXXXX"
1506 if (((tmpdir
= getenv ("TMPDIR")) == NULL
|| *tmpdir
== '\0')
1507 #if defined (__MSDOS__) || defined (WINDOWS32) || defined (__EMX__)
1508 /* These are also used commonly on these platforms. */
1509 && ((tmpdir
= getenv ("TEMP")) == NULL
|| *tmpdir
== '\0')
1510 && ((tmpdir
= getenv ("TMP")) == NULL
|| *tmpdir
== '\0')
1513 tmpdir
= DEFAULT_TMPDIR
;
1515 template = alloca (strlen (tmpdir
) + sizeof (DEFAULT_TMPFILE
) + 1);
1516 strcpy (template, tmpdir
);
1518 #ifdef HAVE_DOS_PATHS
1519 if (strchr ("/\\", template[strlen (template) - 1]) == NULL
)
1520 strcat (template, "/");
1523 if (template[strlen (template) - 1] != '/')
1524 strcat (template, "/");
1526 #endif /* !HAVE_DOS_PATHS */
1528 strcat (template, DEFAULT_TMPFILE
);
1529 outfile
= open_tmpfile (&stdin_nm
, template);
1531 pfatal_with_name (_("fopen (temporary file)"));
1532 while (!feof (stdin
) && ! ferror (stdin
))
1535 unsigned int n
= fread (buf
, 1, sizeof (buf
), stdin
);
1536 if (n
> 0 && fwrite (buf
, 1, n
, outfile
) != n
)
1537 pfatal_with_name (_("fwrite (temporary file)"));
1541 /* Replace the name that read_all_makefiles will
1542 see with the name of the temporary file. */
1543 makefiles
->list
[i
] = strcache_add (stdin_nm
);
1545 /* Make sure the temporary file will not be remade. */
1547 struct file
*f
= enter_file (strcache_add (stdin_nm
));
1549 f
->update_status
= 0;
1550 f
->command_state
= cs_finished
;
1551 /* Can't be intermediate, or it'll be removed too early for
1553 f
->intermediate
= 0;
1559 #ifndef __EMX__ /* Don't use a SIGCHLD handler for OS/2 */
1560 #if defined(MAKE_JOBSERVER) || !defined(HAVE_WAIT_NOHANG)
1561 /* Set up to handle children dying. This must be done before
1562 reading in the makefiles so that `shell' function calls will work.
1564 If we don't have a hanging wait we have to fall back to old, broken
1565 functionality here and rely on the signal handler and counting
1568 If we're using the jobs pipe we need a signal handler so that
1569 SIGCHLD is not ignored; we need it to interrupt the read(2) of the
1570 jobserver pipe in job.c if we're waiting for a token.
1572 If none of these are true, we don't need a signal handler at all. */
1574 RETSIGTYPE
child_handler (int sig
);
1575 # if defined SIGCHLD
1576 bsd_signal (SIGCHLD
, child_handler
);
1578 # if defined SIGCLD && SIGCLD != SIGCHLD
1579 bsd_signal (SIGCLD
, child_handler
);
1585 /* Let the user send us SIGUSR1 to toggle the -d flag during the run. */
1587 bsd_signal (SIGUSR1
, debug_signal_handler
);
1590 /* Define the initial list of suffixes for old-style rules. */
1592 set_default_suffixes ();
1594 /* Define the file rules for the built-in suffix rules. These will later
1595 be converted into pattern rules. We used to do this in
1596 install_default_implicit_rules, but since that happens after reading
1597 makefiles, it results in the built-in pattern rules taking precedence
1598 over makefile-specified suffix rules, which is wrong. */
1600 install_default_suffix_rules ();
1602 /* Define some internal and special variables. */
1604 define_automatic_variables ();
1606 /* Set up the MAKEFLAGS and MFLAGS variables
1607 so makefiles can look at them. */
1609 define_makeflags (0, 0);
1611 /* Define the default variables. */
1612 define_default_variables ();
1614 default_file
= enter_file (strcache_add (".DEFAULT"));
1616 default_goal_var
= define_variable_cname (".DEFAULT_GOAL", "", o_file
, 0);
1618 /* Evaluate all strings provided with --eval.
1619 Also set up the $(-*-eval-flags-*-) variable. */
1625 unsigned int len
= sizeof ("--eval=") * eval_strings
->idx
;
1627 for (i
= 0; i
< eval_strings
->idx
; ++i
)
1629 p
= xstrdup (eval_strings
->list
[i
]);
1630 len
+= 2 * strlen (p
);
1635 p
= value
= alloca (len
);
1636 for (i
= 0; i
< eval_strings
->idx
; ++i
)
1638 strcpy (p
, "--eval=");
1640 p
= quote_for_env (p
, eval_strings
->list
[i
]);
1645 define_variable_cname ("-*-eval-flags-*-", value
, o_automatic
, 0);
1648 /* Read all the makefiles. */
1651 = read_all_makefiles (makefiles
== 0 ? 0 : makefiles
->list
);
1654 /* look one last time after reading all Makefiles */
1655 if (no_default_sh_exe
)
1656 no_default_sh_exe
= !find_and_set_default_shell(NULL
);
1657 #endif /* WINDOWS32 */
1659 #if defined (__MSDOS__) || defined (__EMX__)
1660 /* We need to know what kind of shell we will be using. */
1662 extern int _is_unixy_shell (const char *_path
);
1663 struct variable
*shv
= lookup_variable (STRING_SIZE_TUPLE ("SHELL"));
1664 extern int unixy_shell
;
1665 extern char *default_shell
;
1667 if (shv
&& *shv
->value
)
1669 char *shell_path
= recursively_expand(shv
);
1671 if (shell_path
&& _is_unixy_shell (shell_path
))
1676 default_shell
= shell_path
;
1679 #endif /* __MSDOS__ || __EMX__ */
1681 /* Decode switches again, in case the variables were set by the makefile. */
1682 decode_env_switches (STRING_SIZE_TUPLE ("MAKEFLAGS"));
1684 decode_env_switches (STRING_SIZE_TUPLE ("MFLAGS"));
1687 #if defined (__MSDOS__) || defined (__EMX__)
1690 && _osmode
!= OS2_MODE
/* turn off -j if we are in DOS mode */
1695 _("Parallel jobs (-j) are not supported on this platform."));
1696 error (NILF
, _("Resetting to single job (-j1) mode."));
1701 #ifdef MAKE_JOBSERVER
1702 /* If the jobserver-fds option is seen, make sure that -j is reasonable. */
1709 for (ui
=1; ui
< jobserver_fds
->idx
; ++ui
)
1710 if (!streq (jobserver_fds
->list
[0], jobserver_fds
->list
[ui
]))
1711 fatal (NILF
, _("internal error: multiple --jobserver-fds options"));
1713 /* Now parse the fds string and make sure it has the proper format. */
1715 cp
= jobserver_fds
->list
[0];
1717 if (sscanf (cp
, "%d,%d", &job_fds
[0], &job_fds
[1]) != 2)
1719 _("internal error: invalid --jobserver-fds string `%s'"), cp
);
1722 (_("Jobserver client (fds %d,%d)\n"), job_fds
[0], job_fds
[1]));
1724 /* The combination of a pipe + !job_slots means we're using the
1725 jobserver. If !job_slots and we don't have a pipe, we can start
1726 infinite jobs. If we see both a pipe and job_slots >0 that means the
1727 user set -j explicitly. This is broken; in this case obey the user
1728 (ignore the jobserver pipe for this make) but print a message. */
1732 _("warning: -jN forced in submake: disabling jobserver mode."));
1734 /* Create a duplicate pipe, that will be closed in the SIGCHLD
1735 handler. If this fails with EBADF, the parent has closed the pipe
1736 on us because it didn't think we were a submake. If so, print a
1737 warning then default to -j1. */
1739 else if ((job_rfd
= dup (job_fds
[0])) < 0)
1742 pfatal_with_name (_("dup jobserver"));
1745 _("warning: jobserver unavailable: using -j1. Add `+' to parent make rule."));
1753 job_fds
[0] = job_fds
[1] = -1;
1754 free (jobserver_fds
->list
);
1755 free (jobserver_fds
);
1760 /* If we have >1 slot but no jobserver-fds, then we're a top-level make.
1761 Set up the pipe and install the fds option for our children. */
1768 if (pipe (job_fds
) < 0 || (job_rfd
= dup (job_fds
[0])) < 0)
1769 pfatal_with_name (_("creating jobs pipe"));
1771 /* Every make assumes that it always has one job it can run. For the
1772 submakes it's the token they were given by their parent. For the
1773 top make, we just subtract one from the number the user wants. We
1774 want job_slots to be 0 to indicate we're using the jobserver. */
1776 master_job_slots
= job_slots
;
1782 EINTRLOOP (r
, write (job_fds
[1], &c
, 1));
1784 pfatal_with_name (_("init jobserver pipe"));
1787 /* Fill in the jobserver_fds struct for our children. */
1789 cp
= xmalloc ((sizeof ("1024")*2)+1);
1790 sprintf (cp
, "%d,%d", job_fds
[0], job_fds
[1]);
1792 jobserver_fds
= (struct stringlist
*)
1793 xmalloc (sizeof (struct stringlist
));
1794 jobserver_fds
->list
= xmalloc (sizeof (char *));
1795 jobserver_fds
->list
[0] = cp
;
1796 jobserver_fds
->idx
= 1;
1797 jobserver_fds
->max
= 1;
1801 #ifndef MAKE_SYMLINKS
1802 if (check_symlink_flag
)
1804 error (NILF
, _("Symbolic links not supported: disabling -L."));
1805 check_symlink_flag
= 0;
1809 /* Set up MAKEFLAGS and MFLAGS again, so they will be right. */
1811 define_makeflags (1, 0);
1813 /* Make each `struct dep' point at the `struct file' for the file
1814 depended on. Also do magic for special targets. */
1818 /* Convert old-style suffix rules to pattern rules. It is important to
1819 do this before installing the built-in pattern rules below, so that
1820 makefile-specified suffix rules take precedence over built-in pattern
1823 convert_to_pattern ();
1825 /* Install the default implicit pattern rules.
1826 This used to be done before reading the makefiles.
1827 But in that case, built-in pattern rules were in the chain
1828 before user-defined ones, so they matched first. */
1830 install_default_implicit_rules ();
1832 /* Compute implicit rule limits. */
1834 count_implicit_rule_limits ();
1836 /* Construct the listings of directories in VPATH lists. */
1838 build_vpath_lists ();
1840 /* Mark files given with -o flags as very old and as having been updated
1841 already, and files given with -W flags as brand new (time-stamp as far
1842 as possible into the future). If restarts is set we'll do -W later. */
1847 for (p
= old_files
->list
; *p
!= 0; ++p
)
1849 struct file
*f
= enter_file (*p
);
1850 f
->last_mtime
= f
->mtime_before_update
= OLD_MTIME
;
1852 f
->update_status
= 0;
1853 f
->command_state
= cs_finished
;
1857 if (!restarts
&& new_files
!= 0)
1860 for (p
= new_files
->list
; *p
!= 0; ++p
)
1862 struct file
*f
= enter_file (*p
);
1863 f
->last_mtime
= f
->mtime_before_update
= NEW_MTIME
;
1867 /* Initialize the remote job module. */
1870 if (read_makefiles
!= 0)
1872 /* Update any makefiles if necessary. */
1874 FILE_TIMESTAMP
*makefile_mtimes
= 0;
1875 unsigned int mm_idx
= 0;
1878 int orig_db_level
= db_level
;
1881 if (! ISDB (DB_MAKEFILES
))
1884 DB (DB_BASIC
, (_("Updating makefiles....\n")));
1886 /* Remove any makefiles we don't want to try to update.
1887 Also record the current modtimes so we can compare them later. */
1889 register struct dep
*d
, *last
;
1894 struct file
*f
= d
->file
;
1895 if (f
->double_colon
)
1896 for (f
= f
->double_colon
; f
!= NULL
; f
= f
->prev
)
1898 if (f
->deps
== 0 && f
->cmds
!= 0)
1900 /* This makefile is a :: target with commands, but
1901 no dependencies. So, it will always be remade.
1902 This might well cause an infinite loop, so don't
1903 try to remake it. (This will only happen if
1904 your makefiles are written exceptionally
1905 stupidly; but if you work for Athena, that's how
1906 you write your makefiles.) */
1909 (_("Makefile `%s' might loop; not remaking it.\n"),
1913 read_makefiles
= d
->next
;
1915 last
->next
= d
->next
;
1917 /* Free the storage. */
1920 d
= last
== 0 ? read_makefiles
: last
->next
;
1925 if (f
== NULL
|| !f
->double_colon
)
1927 makefile_mtimes
= xrealloc (makefile_mtimes
,
1929 * sizeof (FILE_TIMESTAMP
));
1930 makefile_mtimes
[mm_idx
++] = file_mtime_no_search (d
->file
);
1937 /* Set up `MAKEFLAGS' specially while remaking makefiles. */
1938 define_makeflags (1, 1);
1940 rebuilding_makefiles
= 1;
1941 status
= update_goal_chain (read_makefiles
);
1942 rebuilding_makefiles
= 0;
1947 /* The only way this can happen is if the user specified -q and asked
1948 * for one of the makefiles to be remade as a target on the command
1949 * line. Since we're not actually updating anything with -q we can
1950 * treat this as "did nothing".
1958 /* Failed to update. Figure out if we care. */
1960 /* Nonzero if any makefile was successfully remade. */
1962 /* Nonzero if any makefile we care about failed
1963 in updating or could not be found at all. */
1968 for (i
= 0, d
= read_makefiles
; d
!= 0; ++i
, d
= d
->next
)
1970 /* Reset the considered flag; we may need to look at the file
1971 again to print an error. */
1972 d
->file
->considered
= 0;
1974 if (d
->file
->updated
)
1976 /* This makefile was updated. */
1977 if (d
->file
->update_status
== 0)
1979 /* It was successfully updated. */
1980 any_remade
|= (file_mtime_no_search (d
->file
)
1981 != makefile_mtimes
[i
]);
1983 else if (! (d
->changed
& RM_DONTCARE
))
1985 FILE_TIMESTAMP mtime
;
1986 /* The update failed and this makefile was not
1987 from the MAKEFILES variable, so we care. */
1988 error (NILF
, _("Failed to remake makefile `%s'."),
1990 mtime
= file_mtime_no_search (d
->file
);
1991 any_remade
|= (mtime
!= NONEXISTENT_MTIME
1992 && mtime
!= makefile_mtimes
[i
]);
1993 makefile_status
= MAKE_FAILURE
;
1997 /* This makefile was not found at all. */
1998 if (! (d
->changed
& RM_DONTCARE
))
2000 /* This is a makefile we care about. See how much. */
2001 if (d
->changed
& RM_INCLUDED
)
2002 /* An included makefile. We don't need
2003 to die, but we do want to complain. */
2005 _("Included makefile `%s' was not found."),
2009 /* A normal makefile. We must die later. */
2010 error (NILF
, _("Makefile `%s' was not found"),
2016 /* Reset this to empty so we get the right error message below. */
2028 /* Updated successfully. Re-exec ourselves. */
2030 remove_intermediates (0);
2032 if (print_data_base_flag
)
2035 log_working_directory (0);
2037 clean_jobserver (0);
2041 /* These names might have changed. */
2043 for (i
= 1; i
< argc
; ++i
)
2044 if (strneq (argv
[i
], "-f", 2)) /* XXX */
2046 if (argv
[i
][2] == '\0')
2047 /* This cast is OK since we never modify argv. */
2048 argv
[++i
] = (char *) makefiles
->list
[j
];
2050 argv
[i
] = xstrdup (concat (2, "-f", makefiles
->list
[j
]));
2055 /* Add -o option for the stdin temporary file, if necessary. */
2059 nargv
= xmalloc ((nargc
+ 2) * sizeof (char *));
2060 memcpy (nargv
, argv
, argc
* sizeof (char *));
2061 nargv
[nargc
++] = xstrdup (concat (2, "-o", stdin_nm
));
2067 if (directories
!= 0 && directories
->idx
> 0)
2070 if (directory_before_chdir
!= 0)
2072 if (chdir (directory_before_chdir
) < 0)
2073 perror_with_name ("chdir", "");
2078 fatal (NILF
, _("Couldn't change back to original directory."));
2083 /* Reset makeflags in case they were changed. */
2085 const char *pv
= define_makeflags (1, 1);
2086 char *p
= alloca (sizeof ("MAKEFLAGS=") + strlen (pv
) + 1);
2087 sprintf (p
, "MAKEFLAGS=%s", pv
);
2091 if (ISDB (DB_BASIC
))
2094 printf (_("Re-executing[%u]:"), restarts
);
2095 for (p
= nargv
; *p
!= 0; ++p
)
2103 for (p
= environ
; *p
!= 0; ++p
)
2105 if (strneq (*p
, MAKELEVEL_NAME
, MAKELEVEL_LENGTH
)
2106 && (*p
)[MAKELEVEL_LENGTH
] == '=')
2109 sprintf (*p
, "%s=%u", MAKELEVEL_NAME
, makelevel
);
2111 if (strneq (*p
, "MAKE_RESTARTS=", 14))
2114 sprintf (*p
, "MAKE_RESTARTS=%u", restarts
);
2123 sprintf (buffer
, "%u", makelevel
);
2124 SetVar (MAKELEVEL_NAME
, buffer
, -1, GVF_GLOBAL_ONLY
);
2126 sprintf (buffer
, "%u", restarts
);
2127 SetVar ("MAKE_RESTARTS", buffer
, -1, GVF_GLOBAL_ONLY
);
2132 /* If we didn't set the restarts variable yet, add it. */
2135 char *b
= alloca (40);
2136 sprintf (b
, "MAKE_RESTARTS=%u", restarts
);
2143 /* Close the dup'd jobserver pipe if we opened one. */
2148 exec_command (nargv
);
2150 #elif defined (__EMX__)
2152 /* It is not possible to use execve() here because this
2153 would cause the parent process to be terminated with
2154 exit code 0 before the child process has been terminated.
2155 Therefore it may be the best solution simply to spawn the
2156 child process including all file handles and to wait for its
2160 pid
= child_execute_job (0, 1, nargv
, environ
);
2162 /* is this loop really necessary? */
2164 pid
= wait (&status
);
2166 /* use the exit code of the child process */
2167 exit (WIFEXITED(status
) ? WEXITSTATUS(status
) : EXIT_FAILURE
);
2170 exec_command (nargv
, environ
);
2175 #define BOGUS_UPDATE_STATUS 0
2176 assert (BOGUS_UPDATE_STATUS
);
2180 db_level
= orig_db_level
;
2182 /* Free the makefile mtimes (if we allocated any). */
2183 if (makefile_mtimes
)
2184 free (makefile_mtimes
);
2187 /* Set up `MAKEFLAGS' again for the normal targets. */
2188 define_makeflags (1, 0);
2190 /* Set always_make_flag if -B was given. */
2191 always_make_flag
= always_make_set
;
2193 /* If restarts is set we haven't set up -W files yet, so do that now. */
2194 if (restarts
&& new_files
!= 0)
2197 for (p
= new_files
->list
; *p
!= 0; ++p
)
2199 struct file
*f
= enter_file (*p
);
2200 f
->last_mtime
= f
->mtime_before_update
= NEW_MTIME
;
2204 /* If there is a temp file from reading a makefile from stdin, get rid of
2206 if (stdin_nm
&& unlink (stdin_nm
) < 0 && errno
!= ENOENT
)
2207 perror_with_name (_("unlink (temporary file): "), stdin_nm
);
2209 /* If there were no command-line goals, use the default. */
2214 if (default_goal_var
->recursive
)
2215 p
= variable_expand (default_goal_var
->value
);
2218 p
= variable_buffer_output (variable_buffer
, default_goal_var
->value
,
2219 strlen (default_goal_var
->value
));
2221 p
= variable_buffer
;
2226 struct file
*f
= lookup_file (p
);
2228 /* If .DEFAULT_GOAL is a non-existent target, enter it into the
2229 table and let the standard logic sort it out. */
2234 ns
= PARSE_FILE_SEQ (&p
, struct nameseq
, '\0', NULL
, 0);
2237 /* .DEFAULT_GOAL should contain one target. */
2239 fatal (NILF
, _(".DEFAULT_GOAL contains more than one target"));
2241 f
= enter_file (strcache_add (ns
->name
));
2243 ns
->name
= 0; /* It was reused by enter_file(). */
2250 goals
= alloc_dep ();
2261 if (read_makefiles
== 0)
2262 fatal (NILF
, _("No targets specified and no makefile found"));
2264 fatal (NILF
, _("No targets"));
2267 /* Update the goals. */
2269 DB (DB_BASIC
, (_("Updating goal targets....\n")));
2274 switch (update_goal_chain (goals
))
2277 /* Nothing happened. */
2279 /* Updated successfully. */
2280 status
= makefile_status
;
2283 /* We are under -q and would run some commands. */
2284 status
= MAKE_TROUBLE
;
2287 /* Updating failed. POSIX.2 specifies exit status >1 for this;
2288 but in VMS, there is only success and failure. */
2289 status
= MAKE_FAILURE
;
2295 /* If we detected some clock skew, generate one last warning */
2296 if (clock_skew_detected
)
2298 _("warning: Clock skew detected. Your build may be incomplete."));
2308 /* Parsing of arguments, decoding of switches. */
2310 static char options
[1 + sizeof (switches
) / sizeof (switches
[0]) * 3];
2311 static struct option long_options
[(sizeof (switches
) / sizeof (switches
[0])) +
2312 (sizeof (long_option_aliases
) /
2313 sizeof (long_option_aliases
[0]))];
2315 /* Fill in the string and vector for getopt. */
2317 init_switches (void)
2323 if (options
[0] != '\0')
2329 /* Return switch and non-switch args in order, regardless of
2330 POSIXLY_CORRECT. Non-switch args are returned as option 1. */
2333 for (i
= 0; switches
[i
].c
!= '\0'; ++i
)
2335 long_options
[i
].name
= (switches
[i
].long_name
== 0 ? "" :
2336 switches
[i
].long_name
);
2337 long_options
[i
].flag
= 0;
2338 long_options
[i
].val
= switches
[i
].c
;
2339 if (short_option (switches
[i
].c
))
2340 *p
++ = switches
[i
].c
;
2341 switch (switches
[i
].type
)
2346 long_options
[i
].has_arg
= no_argument
;
2353 if (short_option (switches
[i
].c
))
2355 if (switches
[i
].noarg_value
!= 0)
2357 if (short_option (switches
[i
].c
))
2359 long_options
[i
].has_arg
= optional_argument
;
2362 long_options
[i
].has_arg
= required_argument
;
2367 for (c
= 0; c
< (sizeof (long_option_aliases
) /
2368 sizeof (long_option_aliases
[0]));
2370 long_options
[i
++] = long_option_aliases
[c
];
2371 long_options
[i
].name
= 0;
2375 handle_non_switch_argument (char *arg
, int env
)
2377 /* Non-option argument. It might be a variable definition. */
2379 if (arg
[0] == '-' && arg
[1] == '\0')
2380 /* Ignore plain `-' for compatibility. */
2382 v
= try_variable_definition (0, arg
, o_command
, 0);
2385 /* It is indeed a variable definition. If we don't already have this
2386 one, record a pointer to the variable for later use in
2387 define_makeflags. */
2388 struct command_variable
*cv
;
2390 for (cv
= command_variables
; cv
!= 0; cv
= cv
->next
)
2391 if (cv
->variable
== v
)
2395 cv
= xmalloc (sizeof (*cv
));
2397 cv
->next
= command_variables
;
2398 command_variables
= cv
;
2403 /* Not an option or variable definition; it must be a goal
2404 target! Enter it as a file and add it to the dep chain of
2406 struct file
*f
= enter_file (strcache_add (expand_command_line_file (arg
)));
2411 goals
= alloc_dep ();
2416 lastgoal
->next
= alloc_dep ();
2417 lastgoal
= lastgoal
->next
;
2423 /* Add this target name to the MAKECMDGOALS variable. */
2424 struct variable
*gv
;
2427 gv
= lookup_variable (STRING_SIZE_TUPLE ("MAKECMDGOALS"));
2432 /* Paste the old and new values together */
2433 unsigned int oldlen
, newlen
;
2436 oldlen
= strlen (gv
->value
);
2437 newlen
= strlen (f
->name
);
2438 vp
= alloca (oldlen
+ 1 + newlen
+ 1);
2439 memcpy (vp
, gv
->value
, oldlen
);
2441 memcpy (&vp
[oldlen
+ 1], f
->name
, newlen
+ 1);
2444 define_variable_cname ("MAKECMDGOALS", value
, o_default
, 0);
2449 /* Print a nice usage method. */
2452 print_usage (int bad
)
2454 const char *const *cpp
;
2457 if (print_version_flag
)
2460 usageto
= bad
? stderr
: stdout
;
2462 fprintf (usageto
, _("Usage: %s [options] [target] ...\n"), program
);
2464 for (cpp
= usage
; *cpp
; ++cpp
)
2465 fputs (_(*cpp
), usageto
);
2467 if (!remote_description
|| *remote_description
== '\0')
2468 fprintf (usageto
, _("\nThis program built for %s\n"), make_host
);
2470 fprintf (usageto
, _("\nThis program built for %s (%s)\n"),
2471 make_host
, remote_description
);
2473 fprintf (usageto
, _("Report bugs to <bug-make@gnu.org>\n"));
2476 /* Decode switches from ARGC and ARGV.
2477 They came from the environment if ENV is nonzero. */
2480 decode_switches (int argc
, char **argv
, int env
)
2483 register const struct command_switch
*cs
;
2484 register struct stringlist
*sl
;
2487 /* getopt does most of the parsing for us.
2488 First, get its vectors set up. */
2492 /* Let getopt produce error messages for the command line,
2493 but not for options from the environment. */
2495 /* Reset getopt's state. */
2498 while (optind
< argc
)
2500 /* Parse the next argument. */
2501 c
= getopt_long (argc
, argv
, options
, long_options
, (int *) 0);
2503 /* End of arguments, or "--" marker seen. */
2506 /* An argument not starting with a dash. */
2507 handle_non_switch_argument (optarg
, env
);
2509 /* Bad option. We will print a usage message and die later.
2510 But continue to parse the other options so the user can
2511 see all he did wrong. */
2514 for (cs
= switches
; cs
->c
!= '\0'; ++cs
)
2517 /* Whether or not we will actually do anything with
2518 this switch. We test this individually inside the
2519 switch below rather than just once outside it, so that
2520 options which are to be ignored still consume args. */
2521 int doit
= !env
|| cs
->env
;
2534 *(int *) cs
->value_ptr
= cs
->type
== flag
;
2543 optarg
= xstrdup (cs
->noarg_value
);
2544 else if (*optarg
== '\0')
2547 const char *op
= opt
;
2549 if (short_option (cs
->c
))
2554 error (NILF
, _("the `%s%s' option requires a non-empty string argument"),
2555 short_option (cs
->c
) ? "-" : "--", op
);
2559 sl
= *(struct stringlist
**) cs
->value_ptr
;
2562 sl
= (struct stringlist
*)
2563 xmalloc (sizeof (struct stringlist
));
2566 sl
->list
= xmalloc (5 * sizeof (char *));
2567 *(struct stringlist
**) cs
->value_ptr
= sl
;
2569 else if (sl
->idx
== sl
->max
- 1)
2572 sl
->list
= xrealloc (sl
->list
,
2573 sl
->max
* sizeof (char *));
2575 if (cs
->type
== filename
)
2576 sl
->list
[sl
->idx
++] = expand_command_line_file (optarg
);
2578 sl
->list
[sl
->idx
++] = optarg
;
2579 sl
->list
[sl
->idx
] = 0;
2583 /* See if we have an option argument; if we do require that
2584 it's all digits, not something like "10foo". */
2585 if (optarg
== 0 && argc
> optind
)
2588 for (cp
=argv
[optind
]; ISDIGIT (cp
[0]); ++cp
)
2591 optarg
= argv
[optind
++];
2599 int i
= atoi (optarg
);
2602 /* Yes, I realize we're repeating this in some cases. */
2603 for (cp
= optarg
; ISDIGIT (cp
[0]); ++cp
)
2606 if (i
< 1 || cp
[0] != '\0')
2608 error (NILF
, _("the `-%c' option requires a positive integral argument"),
2613 *(unsigned int *) cs
->value_ptr
= i
;
2616 *(unsigned int *) cs
->value_ptr
2617 = *(unsigned int *) cs
->noarg_value
;
2622 if (optarg
== 0 && optind
< argc
2623 && (ISDIGIT (argv
[optind
][0]) || argv
[optind
][0] == '.'))
2624 optarg
= argv
[optind
++];
2627 *(double *) cs
->value_ptr
2628 = (optarg
!= 0 ? atof (optarg
)
2629 : *(double *) cs
->noarg_value
);
2635 /* We've found the switch. Stop looking. */
2640 /* There are no more options according to getting getopt, but there may
2641 be some arguments left. Since we have asked for non-option arguments
2642 to be returned in order, this only happens when there is a "--"
2643 argument to prevent later arguments from being options. */
2644 while (optind
< argc
)
2645 handle_non_switch_argument (argv
[optind
++], env
);
2648 if (!env
&& (bad
|| print_usage_flag
))
2655 /* Decode switches from environment variable ENVAR (which is LEN chars long).
2656 We do this by chopping the value into a vector of words, prepending a
2657 dash to the first word if it lacks one, and passing the vector to
2661 decode_env_switches (char *envar
, unsigned int len
)
2663 char *varref
= alloca (2 + len
+ 2);
2668 /* Get the variable's value. */
2671 memcpy (&varref
[2], envar
, len
);
2672 varref
[2 + len
] = ')';
2673 varref
[2 + len
+ 1] = '\0';
2674 value
= variable_expand (varref
);
2676 /* Skip whitespace, and check for an empty value. */
2677 value
= next_token (value
);
2678 len
= strlen (value
);
2682 /* Allocate a vector that is definitely big enough. */
2683 argv
= alloca ((1 + len
+ 1) * sizeof (char *));
2685 /* Allocate a buffer to copy the value into while we split it into words
2686 and unquote it. We must use permanent storage for this because
2687 decode_switches may store pointers into the passed argument words. */
2688 p
= xmalloc (2 * len
);
2690 /* getopt will look at the arguments starting at ARGV[1].
2691 Prepend a spacer word. */
2695 while (*value
!= '\0')
2697 if (*value
== '\\' && value
[1] != '\0')
2698 ++value
; /* Skip the backslash. */
2699 else if (isblank ((unsigned char)*value
))
2701 /* End of the word. */
2706 while (isblank ((unsigned char)*value
));
2714 if (argv
[1][0] != '-' && strchr (argv
[1], '=') == 0)
2715 /* The first word doesn't start with a dash and isn't a variable
2716 definition. Add a dash and pass it along to decode_switches. We
2717 need permanent storage for this in case decode_switches saves
2718 pointers into the value. */
2719 argv
[1] = xstrdup (concat (2, "-", argv
[1]));
2721 /* Parse those words. */
2722 decode_switches (argc
, argv
, 1);
2725 /* Quote the string IN so that it will be interpreted as a single word with
2726 no magic by decode_env_switches; also double dollar signs to avoid
2727 variable expansion in make itself. Write the result into OUT, returning
2728 the address of the next character to be written.
2729 Allocating space for OUT twice the length of IN is always sufficient. */
2732 quote_for_env (char *out
, const char *in
)
2738 else if (isblank ((unsigned char)*in
) || *in
== '\\')
2746 /* Define the MAKEFLAGS and MFLAGS variables to reflect the settings of the
2747 command switches. Include options with args if ALL is nonzero.
2748 Don't include options with the `no_makefile' flag set if MAKEFILE. */
2751 define_makeflags (int all
, int makefile
)
2753 const char ref
[] = "$(MAKEOVERRIDES)";
2754 const char posixref
[] = "$(-*-command-variables-*-)";
2755 const char evalref
[] = "$(-*-eval-flags-*-)";
2756 const struct command_switch
*cs
;
2762 /* We will construct a linked list of `struct flag's describing
2763 all the flags which need to go in MAKEFLAGS. Then, once we
2764 know how many there are and their lengths, we can put them all
2765 together in a string. */
2770 const struct command_switch
*cs
;
2773 struct flag
*flags
= 0;
2774 unsigned int flagslen
= 0;
2775 #define ADD_FLAG(ARG, LEN) \
2777 struct flag *new = alloca (sizeof (struct flag)); \
2780 new->next = flags; \
2782 if (new->arg == 0) \
2783 ++flagslen; /* Just a single flag letter. */ \
2785 /* " -x foo", plus space to expand "foo". */ \
2786 flagslen += 1 + 1 + 1 + 1 + (3 * (LEN)); \
2787 if (!short_option (cs->c)) \
2788 /* This switch has no single-letter version, so we use the long. */ \
2789 flagslen += 2 + strlen (cs->long_name); \
2792 for (cs
= switches
; cs
->c
!= '\0'; ++cs
)
2793 if (cs
->toenv
&& (!makefile
|| !cs
->no_makefile
))
2801 if (!*(int *) cs
->value_ptr
== (cs
->type
== flag_off
)
2802 && (cs
->default_value
== 0
2803 || *(int *) cs
->value_ptr
!= *(int *) cs
->default_value
))
2810 if ((cs
->default_value
!= 0
2811 && (*(unsigned int *) cs
->value_ptr
2812 == *(unsigned int *) cs
->default_value
)))
2814 else if (cs
->noarg_value
!= 0
2815 && (*(unsigned int *) cs
->value_ptr
==
2816 *(unsigned int *) cs
->noarg_value
))
2817 ADD_FLAG ("", 0); /* Optional value omitted; see below. */
2818 else if (cs
->c
== 'j')
2819 /* Special case for `-j'. */
2823 char *buf
= alloca (30);
2824 sprintf (buf
, "%u", *(unsigned int *) cs
->value_ptr
);
2825 ADD_FLAG (buf
, strlen (buf
));
2834 if (cs
->default_value
!= 0
2835 && (*(double *) cs
->value_ptr
2836 == *(double *) cs
->default_value
))
2838 else if (cs
->noarg_value
!= 0
2839 && (*(double *) cs
->value_ptr
2840 == *(double *) cs
->noarg_value
))
2841 ADD_FLAG ("", 0); /* Optional value omitted; see below. */
2844 char *buf
= alloca (100);
2845 sprintf (buf
, "%g", *(double *) cs
->value_ptr
);
2846 ADD_FLAG (buf
, strlen (buf
));
2856 struct stringlist
*sl
= *(struct stringlist
**) cs
->value_ptr
;
2859 /* Add the elements in reverse order, because all the flags
2860 get reversed below; and the order matters for some
2861 switches (like -I). */
2862 unsigned int i
= sl
->idx
;
2864 ADD_FLAG (sl
->list
[i
], strlen (sl
->list
[i
]));
2873 /* Four more for the possible " -- ". */
2874 flagslen
+= 4 + sizeof (posixref
) + sizeof (evalref
);
2878 /* Construct the value in FLAGSTRING.
2879 We allocate enough space for a preceding dash and trailing null. */
2880 flagstring
= alloca (1 + flagslen
+ 1);
2881 memset (flagstring
, '\0', 1 + flagslen
+ 1);
2887 /* Add the flag letter or name to the string. */
2888 if (short_option (flags
->cs
->c
))
2889 *p
++ = flags
->cs
->c
;
2898 strcpy (p
, flags
->cs
->long_name
);
2901 if (flags
->arg
!= 0)
2903 /* A flag that takes an optional argument which in this case is
2904 omitted is specified by ARG being "". We must distinguish
2905 because a following flag appended without an intervening " -"
2906 is considered the arg for the first. */
2907 if (flags
->arg
[0] != '\0')
2909 /* Add its argument too. */
2910 *p
++ = !short_option (flags
->cs
->c
) ? '=' : ' ';
2911 p
= quote_for_env (p
, flags
->arg
);
2914 /* Write a following space and dash, for the next flag. */
2918 else if (!short_option (flags
->cs
->c
))
2921 /* Long options must each go in their own word,
2922 so we write the following space and dash. */
2926 flags
= flags
->next
;
2929 /* Define MFLAGS before appending variable definitions. */
2931 if (p
== &flagstring
[1])
2933 flagstring
[0] = '\0';
2934 else if (p
[-1] == '-')
2936 /* Kill the final space and dash. */
2941 /* Terminate the string. */
2944 /* Since MFLAGS is not parsed for flags, there is no reason to
2945 override any makefile redefinition. */
2946 define_variable_cname ("MFLAGS", flagstring
, o_env
, 1);
2948 /* Write a reference to -*-eval-flags-*-, which contains all the --eval
2952 if (p
== &flagstring
[1])
2953 /* No flags written, so elide the leading dash already written. */
2957 memcpy (p
, evalref
, sizeof (evalref
) - 1);
2958 p
+= sizeof (evalref
) - 1;
2961 if (all
&& command_variables
!= 0)
2963 /* Now write a reference to $(MAKEOVERRIDES), which contains all the
2964 command-line variable definitions. */
2966 if (p
== &flagstring
[1])
2967 /* No flags written, so elide the leading dash already written. */
2971 /* Separate the variables from the switches with a "--" arg. */
2974 /* We did not already write a trailing " -". */
2978 /* There is a trailing " -"; fill it out to " -- ". */
2983 /* Copy in the string. */
2986 memcpy (p
, posixref
, sizeof (posixref
) - 1);
2987 p
+= sizeof (posixref
) - 1;
2991 memcpy (p
, ref
, sizeof (ref
) - 1);
2992 p
+= sizeof (ref
) - 1;
2995 else if (p
== &flagstring
[1])
3000 else if (p
[-1] == '-')
3001 /* Kill the final space and dash. */
3003 /* Terminate the string. */
3006 /* If there are switches, omit the leading dash unless it is a single long
3007 option with two leading dashes. */
3008 if (flagstring
[0] == '-' && flagstring
[1] != '-')
3011 v
= define_variable_cname ("MAKEFLAGS", flagstring
,
3012 /* This used to use o_env, but that lost when a
3013 makefile defined MAKEFLAGS. Makefiles set
3014 MAKEFLAGS to add switches, but we still want
3015 to redefine its value with the full set of
3016 switches. Of course, an override or command
3017 definition will still take precedence. */
3021 /* The first time we are called, set MAKEFLAGS to always be exported.
3022 We should not do this again on the second call, because that is
3023 after reading makefiles which might have done `unexport MAKEFLAGS'. */
3024 v
->export
= v_export
;
3029 /* Print version information. */
3032 print_version (void)
3034 static int printed_version
= 0;
3036 char *precede
= print_data_base_flag
? "# " : "";
3038 if (printed_version
)
3039 /* Do it only once. */
3042 printf ("%sGNU Make %s\n", precede
, version_string
);
3044 if (!remote_description
|| *remote_description
== '\0')
3045 printf (_("%sBuilt for %s\n"), precede
, make_host
);
3047 printf (_("%sBuilt for %s (%s)\n"),
3048 precede
, make_host
, remote_description
);
3050 /* Print this untranslated. The coding standards recommend translating the
3051 (C) to the copyright symbol, but this string is going to change every
3052 year, and none of the rest of it should be translated (including the
3053 word "Copyright", so it hardly seems worth it. */
3055 printf ("%sCopyright (C) 2009 Free Software Foundation, Inc.\n", precede
);
3057 printf (_("%sLicense GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\n\
3058 %sThis is free software: you are free to change and redistribute it.\n\
3059 %sThere is NO WARRANTY, to the extent permitted by law.\n"),
3060 precede
, precede
, precede
);
3062 printed_version
= 1;
3064 /* Flush stdout so the user doesn't have to wait to see the
3065 version information while things are thought about. */
3069 /* Print a bunch of information about this and that. */
3076 when
= time ((time_t *) 0);
3077 printf (_("\n# Make data base, printed on %s"), ctime (&when
));
3079 print_variable_data_base ();
3080 print_dir_data_base ();
3081 print_rule_data_base ();
3082 print_file_data_base ();
3083 print_vpath_data_base ();
3084 strcache_print_stats ("#");
3086 when
= time ((time_t *) 0);
3087 printf (_("\n# Finished Make data base on %s\n"), ctime (&when
));
3091 clean_jobserver (int status
)
3095 /* Sanity: have we written all our jobserver tokens back? If our
3096 exit status is 2 that means some kind of syntax error; we might not
3097 have written all our tokens so do that now. If tokens are left
3098 after any other error code, that's bad. */
3100 if (job_fds
[0] != -1 && jobserver_tokens
)
3104 "INTERNAL: Exiting with %u jobserver tokens (should be 0)!",
3107 while (jobserver_tokens
--)
3111 EINTRLOOP (r
, write (job_fds
[1], &token
, 1));
3113 perror_with_name ("write", "");
3118 /* Sanity: If we're the master, were all the tokens written back? */
3120 if (master_job_slots
)
3122 /* We didn't write one for ourself, so start at 1. */
3123 unsigned int tcnt
= 1;
3125 /* Close the write side, so the read() won't hang. */
3128 while (read (job_fds
[0], &token
, 1) == 1)
3131 if (tcnt
!= master_job_slots
)
3133 "INTERNAL: Exiting with %u jobserver tokens available; should be %u!",
3134 tcnt
, master_job_slots
);
3138 /* Clean out jobserver_fds so we don't pass this information to any
3139 sub-makes. Also reset job_slots since it will be put on the command
3140 line, not in MAKEFLAGS. */
3141 job_slots
= default_job_slots
;
3144 free (jobserver_fds
->list
);
3145 free (jobserver_fds
);
3151 /* Exit with STATUS, cleaning up as necessary. */
3156 static char dying
= 0;
3164 if (print_version_flag
)
3167 /* Wait for children to die. */
3168 err
= (status
!= 0);
3169 while (job_slots_used
> 0)
3170 reap_children (1, err
);
3172 /* Let the remote job module clean up its state. */
3175 /* Remove the intermediate files. */
3176 remove_intermediates (0);
3178 if (print_data_base_flag
)
3181 verify_file_data_base ();
3183 clean_jobserver (status
);
3185 /* Try to move back to the original directory. This is essential on
3186 MS-DOS (where there is really only one process), and on Unix it
3187 puts core files in the original directory instead of the -C
3188 directory. Must wait until after remove_intermediates(), or unlinks
3189 of relative pathnames fail. */
3190 if (directory_before_chdir
!= 0)
3192 /* If it fails we don't care: shut up GCC. */
3194 _x
= chdir (directory_before_chdir
);
3197 log_working_directory (0);
3203 /* Write a message indicating that we've just entered or
3204 left (according to ENTERING) the current directory. */
3207 log_working_directory (int entering
)
3209 static int entered
= 0;
3211 /* Print nothing without the flag. Don't print the entering message
3212 again if we already have. Don't print the leaving message if we
3213 haven't printed the entering message. */
3214 if (! print_directory_flag
|| entering
== entered
)
3219 if (print_data_base_flag
)
3220 fputs ("# ", stdout
);
3222 /* Use entire sentences to give the translators a fighting chance. */
3225 if (starting_directory
== 0)
3227 printf (_("%s: Entering an unknown directory\n"), program
);
3229 printf (_("%s: Leaving an unknown directory\n"), program
);
3232 printf (_("%s: Entering directory `%s'\n"),
3233 program
, starting_directory
);
3235 printf (_("%s: Leaving directory `%s'\n"),
3236 program
, starting_directory
);
3238 if (starting_directory
== 0)
3240 printf (_("%s[%u]: Entering an unknown directory\n"),
3241 program
, makelevel
);
3243 printf (_("%s[%u]: Leaving an unknown directory\n"),
3244 program
, makelevel
);
3247 printf (_("%s[%u]: Entering directory `%s'\n"),
3248 program
, makelevel
, starting_directory
);
3250 printf (_("%s[%u]: Leaving directory `%s'\n"),
3251 program
, makelevel
, starting_directory
);
3253 /* Flush stdout to be sure this comes before any stderr output. */