| /* Definition of target file data structures for GNU Make. |
| Copyright (C) 1988-2016 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 3 of the License, 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 |
| this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| |
| /* Structure that represents the info on one file |
| that the makefile says how to make. |
| All of these are chained together through 'next'. */ |
| |
| #include "hash.h" |
| |
| struct file |
| { |
| const char *name; |
| const char *hname; /* Hashed filename */ |
| const char *vpath; /* VPATH/vpath pathname */ |
| struct dep *deps; /* all dependencies, including duplicates */ |
| struct commands *cmds; /* Commands to execute for this target. */ |
| const char *stem; /* Implicit stem, if an implicit |
| rule has been used */ |
| struct dep *also_make; /* Targets that are made by making this. */ |
| struct file *prev; /* Previous entry for same file name; |
| used when there are multiple double-colon |
| entries for the same file. */ |
| struct file *last; /* Last entry for the same file name. */ |
| |
| /* 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; |
| |
| FILE_TIMESTAMP last_mtime; /* File's modtime, if already known. */ |
| FILE_TIMESTAMP mtime_before_update; /* File's modtime before any updating |
| has been performed. */ |
| int command_flags; /* Flags OR'd in for cmds; see commands.h. */ |
| enum update_status /* Status of the last attempt to update. */ |
| { |
| us_success = 0, /* Successfully updated. Must be 0! */ |
| us_none, /* No attempt to update has been made. */ |
| us_question, /* Needs to be updated (-q is is set). */ |
| us_failed /* Update failed. */ |
| } update_status ENUM_BITFIELD (2); |
| enum cmd_state /* State of the commands. */ |
| { |
| cs_not_started = 0, /* Not yet started. Must be 0! */ |
| cs_deps_running, /* Dep commands running. */ |
| cs_running, /* Commands running. */ |
| cs_finished /* Commands finished. */ |
| } command_state ENUM_BITFIELD (2); |
| |
| unsigned int builtin:1; /* True if the file is a builtin rule. */ |
| unsigned int precious:1; /* Non-0 means don't delete file on quit */ |
| unsigned int loaded:1; /* True if the file is a loaded object. */ |
| unsigned int low_resolution_time:1; /* Nonzero if this file's time stamp |
| has only one-second resolution. */ |
| 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 prerequisite of .PHONY. */ |
| unsigned int intermediate:1;/* Nonzero if this is an intermediate file. */ |
| unsigned int secondary:1; /* Nonzero means remove_intermediates should |
| not delete it. */ |
| 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 */ |
| unsigned int no_diag:1; /* True if the file failed to update and no |
| diagnostics has been issued (dontcare). */ |
| }; |
| |
| |
| extern struct file *suffix_file, *default_file; |
| |
| |
| struct file *lookup_file (const char *name); |
| struct file *enter_file (const char *name); |
| struct dep *split_prereqs (char *prereqstr); |
| struct dep *enter_prereqs (struct dep *prereqs, const char *stem); |
| void remove_intermediates (int sig); |
| void snap_deps (void); |
| void rename_file (struct file *file, const char *name); |
| void rehash_file (struct file *file, const char *name); |
| void set_command_state (struct file *file, enum cmd_state state); |
| void notice_finished_file (struct file *file); |
| void init_hash_files (void); |
| char *build_target_list (char *old_list); |
| void print_prereqs (const struct dep *deps); |
| void print_file_data_base (void); |
| |
| #if FILE_TIMESTAMP_HI_RES |
| # define FILE_TIMESTAMP_STAT_MODTIME(fname, st) \ |
| file_timestamp_cons (fname, (st).st_mtime, (st).ST_MTIM_NSEC) |
| #else |
| # define FILE_TIMESTAMP_STAT_MODTIME(fname, st) \ |
| file_timestamp_cons (fname, (st).st_mtime, 0) |
| #endif |
| |
| /* If FILE_TIMESTAMP is 64 bits (or more), use nanosecond resolution. |
| (Multiply by 2**30 instead of by 10**9 to save time at the cost of |
| slightly decreasing the number of available timestamps.) With |
| 64-bit FILE_TIMESTAMP, this stops working on 2514-05-30 01:53:04 |
| UTC, but by then uintmax_t should be larger than 64 bits. */ |
| #define FILE_TIMESTAMPS_PER_S (FILE_TIMESTAMP_HI_RES ? 1000000000 : 1) |
| #define FILE_TIMESTAMP_LO_BITS (FILE_TIMESTAMP_HI_RES ? 30 : 0) |
| |
| #define FILE_TIMESTAMP_S(ts) (((ts) - ORDINARY_MTIME_MIN) \ |
| >> FILE_TIMESTAMP_LO_BITS) |
| #define FILE_TIMESTAMP_NS(ts) ((int) (((ts) - ORDINARY_MTIME_MIN) \ |
| & ((1 << FILE_TIMESTAMP_LO_BITS) - 1))) |
| |
| /* Upper bound on length of string "YYYY-MM-DD HH:MM:SS.NNNNNNNNN" |
| representing a file timestamp. The upper bound is not necessarily 29, |
| 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) |
| |
| FILE_TIMESTAMP file_timestamp_cons (char const *, time_t, long int); |
| FILE_TIMESTAMP file_timestamp_now (int *); |
| void file_timestamp_sprintf (char *p, FILE_TIMESTAMP ts); |
| |
| /* Return the mtime of file F (a struct file *), caching it. |
| The value is NONEXISTENT_MTIME 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 NONEXISTENT_MTIME if the file does not exist. */ |
| #define file_mtime_no_search(f) file_mtime_1 ((f), 0) |
| FILE_TIMESTAMP f_mtime (struct file *file, int search); |
| #define file_mtime_1(f, v) \ |
| ((f)->last_mtime == UNKNOWN_MTIME ? f_mtime ((f), v) : (f)->last_mtime) |
| |
| /* Special timestamp values. */ |
| |
| /* The file's timestamp is not yet known. */ |
| #define UNKNOWN_MTIME 0 |
| |
| /* The file does not exist. */ |
| #define NONEXISTENT_MTIME 1 |
| |
| /* The file does not exist, and we assume that it is older than any |
| actual file. */ |
| #define OLD_MTIME 2 |
| |
| /* The smallest and largest ordinary timestamps. */ |
| #define ORDINARY_MTIME_MIN (OLD_MTIME + 1) |
| #define ORDINARY_MTIME_MAX ((FILE_TIMESTAMP_S (NEW_MTIME) \ |
| << FILE_TIMESTAMP_LO_BITS) \ |
| + ORDINARY_MTIME_MIN + FILE_TIMESTAMPS_PER_S - 1) |
| |
| /* 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. */ |
| #define NEW_MTIME INTEGER_TYPE_MAXIMUM (FILE_TIMESTAMP) |
| |
| #define check_renamed(file) \ |
| while ((file)->renamed != 0) (file) = (file)->renamed /* No ; here. */ |
| |
| /* Have we snapped deps yet? */ |
| extern int snapped_deps; |
