/* Definition of target file data structures for GNU Make. Copyright (C) 1988,89,90,91,92,93,94,97 Free Software Foundation, Inc. This file is part of GNU Make. GNU Make is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Make; see the file COPYING. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* Structure that represents the info on one file that the makefile says how to make. All of these are chained together through `next'. */ struct file { struct file *next; char *name; char *hname; /* Hashed filename */ char *vpath; /* VPATH/vpath pathname */ struct dep *deps; struct commands *cmds; /* Commands to execute for this target. */ int command_flags; /* Flags OR'd in for cmds; see commands.h. */ char *stem; /* Implicit stem, if an implicit rule has been used */ struct dep *also_make; /* Targets that are made by making this. */ FILE_TIMESTAMP last_mtime; /* File's modtime, if already known. */ FILE_TIMESTAMP mtime_before_update; /* File's modtime before any updating has been performed. */ struct file *prev; /* Previous entry for same file name; used when there are multiple double-colon entries for the same file. */ #if defined(__APPLE__) || defined(NeXT) || defined(NeXT_PDO) /* for NEXT_VPATH_FLAG support */ char *old_name; #endif /* File that this file was renamed to. After any time that a file could be renamed, call `check_renamed' (below). */ struct file *renamed; /* List of variable sets used for this file. */ struct variable_set_list *variables; /* Pattern-specific variable reference for this target, or null if there isn't one. Also see the pat_searched flag, below. */ struct variable_set_list *pat_variables; /* Immediate dependent that caused this target to be remade, or nil if there isn't one. */ struct file *parent; /* For a double-colon entry, this is the first double-colon entry for the same file. Otherwise this is null. */ struct file *double_colon; short int update_status; /* Status of the last attempt to update, or -1 if none has been made. */ enum /* State of the commands. */ { /* Note: It is important that cs_not_started be zero. */ cs_not_started, /* Not yet started. */ cs_deps_running, /* Dep commands running. */ cs_running, /* Commands running. */ cs_finished /* Commands finished. */ } command_state ENUM_BITFIELD (2); unsigned int precious:1; /* Non-0 means don't delete file on quit */ unsigned int tried_implicit:1; /* Nonzero if have searched for implicit rule for making this file; don't search again. */ unsigned int updating:1; /* Nonzero while updating deps of this file */ unsigned int updated:1; /* Nonzero if this file has been remade. */ unsigned int is_target:1; /* Nonzero if file is described as target. */ unsigned int cmd_target:1; /* Nonzero if file was given on cmd line. */ unsigned int phony:1; /* Nonzero if this is a phony file i.e., a dependency of .PHONY. */ unsigned int intermediate:1;/* Nonzero if this is an intermediate file. */ /* Nonzero, for an intermediate file, means remove_intermediates should not delete it. */ unsigned int secondary:1; unsigned int dontcare:1; /* Nonzero if no complaint is to be made if this target cannot be remade. */ unsigned int ignore_vpath:1;/* Nonzero if we threw out VPATH name. */ unsigned int pat_searched:1;/* Nonzero if we already searched for pattern-specific variables. */ unsigned int considered:1; /* equal to `considered' if file has been considered on current scan of goal chain */ }; /* Number of intermediate files entered. */ extern unsigned int num_intermediates; /* Current value for pruning the scan of the goal chain (toggle 0/1). */ extern unsigned int considered; extern struct file *default_goal_file, *suffix_file, *default_file; extern struct file *lookup_file PARAMS ((char *name)); extern struct file *enter_file PARAMS ((char *name)); extern void remove_intermediates PARAMS ((int sig)); extern void snap_deps PARAMS ((void)); extern void rename_file PARAMS ((struct file *file, char *name)); extern void rehash_file PARAMS ((struct file *file, char *name)); extern void file_hash_enter PARAMS ((struct file *file, char *name, unsigned int oldhash, char *oldname)); extern void set_command_state PARAMS ((struct file *file, int state)); extern void notice_finished_file PARAMS ((struct file *file)); #ifdef ST_MTIM_NSEC # define FILE_TIMESTAMP_STAT_MODTIME(st) \ FILE_TIMESTAMP_FROM_S_AND_NS ((st).st_mtime, \ (st).st_mtim.ST_MTIM_NSEC) # define FILE_TIMESTAMPS_PER_S \ MIN ((FILE_TIMESTAMP) 1000000000, \ (INTEGER_TYPE_MAXIMUM (FILE_TIMESTAMP) \ / INTEGER_TYPE_MAXIMUM (time_t))) #else # define FILE_TIMESTAMP_STAT_MODTIME(st) ((st).st_mtime) # define FILE_TIMESTAMPS_PER_S 1 #endif #define FILE_TIMESTAMP_FROM_S_AND_NS(s, ns) \ ((s) * FILE_TIMESTAMPS_PER_S \ + (ns) * FILE_TIMESTAMPS_PER_S / 1000000000) #define FILE_TIMESTAMP_DIV(a, b) ((a)/(b) - ((a)%(b) < 0)) #define FILE_TIMESTAMP_MOD(a, b) ((a)%(b) + ((a)%(b) < 0) * (b)) #define FILE_TIMESTAMP_S(ts) FILE_TIMESTAMP_DIV ((ts), FILE_TIMESTAMPS_PER_S) #define FILE_TIMESTAMP_NS(ts) \ (((FILE_TIMESTAMP_MOD ((ts), FILE_TIMESTAMPS_PER_S) * 1000000000) \ + (FILE_TIMESTAMPS_PER_S - 1)) \ / FILE_TIMESTAMPS_PER_S) /* Upper bound on length of string "YYYY-MM-DD HH:MM:SS.NNNNNNNNN" representing a file timestamp. The upper bound is not necessarily 19, since the year might be less than -999 or greater than 9999. Subtract one for the sign bit if in case file timestamps can be negative; subtract FLOOR_LOG2_SECONDS_PER_YEAR to yield an upper bound on how many file timestamp bits might affect the year; 302 / 1000 is log10 (2) rounded up; add one for integer division truncation; add one more for a minus sign if file timestamps can be negative; add 4 to allow for any 4-digit epoch year (e.g. 1970); add 25 to allow for "-MM-DD HH:MM:SS.NNNNNNNNN". */ #define FLOOR_LOG2_SECONDS_PER_YEAR 24 #define FILE_TIMESTAMP_PRINT_LEN_BOUND \ (((sizeof (FILE_TIMESTAMP) * CHAR_BIT - 1 - FLOOR_LOG2_SECONDS_PER_YEAR) \ * 302 / 1000) \ + 1 + 1 + 4 + 25) extern FILE_TIMESTAMP file_timestamp_now PARAMS ((void)); extern void file_timestamp_sprintf PARAMS ((char *p, FILE_TIMESTAMP ts)); /* Return the mtime of file F (a struct file *), caching it. The value is -1 if the file does not exist. */ #define file_mtime(f) file_mtime_1 ((f), 1) /* Return the mtime of file F (a struct file *), caching it. Don't search using vpath for the file--if it doesn't actually exist, we don't find it. The value is -1 if the file does not exist. */ #define file_mtime_no_search(f) file_mtime_1 ((f), 0) extern FILE_TIMESTAMP f_mtime PARAMS ((struct file *file, int search)); #define file_mtime_1(f, v) \ ((f)->last_mtime ? (f)->last_mtime : f_mtime ((f), v)) /* Modtime value to use for `infinitely new'. We used to get the current time from the system and use that whenever we wanted `new'. But that causes trouble when the machine running make and the machine holding a file have different ideas about what time it is; and can also lose for `force' targets, which need to be considered newer than anything that depends on them, even if said dependents' modtimes are in the future. If FILE_TIMESTAMP is unsigned, its maximum value is the same as ((FILE_TIMESTAMP) -1), so use one less than that, because -1 is used for non-existing files. */ #define NEW_MTIME \ (INTEGER_TYPE_SIGNED (FILE_TIMESTAMP) \ ? INTEGER_TYPE_MAXIMUM (FILE_TIMESTAMP) \ : (INTEGER_TYPE_MAXIMUM (FILE_TIMESTAMP) - 1)) #define check_renamed(file) \ while ((file)->renamed != 0) (file) = (file)->renamed /* No ; here. */