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/* Target file management for GNU Make.Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 Free SoftwareFoundation, Inc.This file is part of GNU Make.GNU Make is free software; you can redistribute it and/or modify it under theterms of the GNU General Public License as published by the Free SoftwareFoundation; either version 2, or (at your option) any later version.GNU Make is distributed in the hope that it will be useful, but WITHOUT ANYWARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FORA PARTICULAR PURPOSE. See the GNU General Public License for more details.You should have received a copy of the GNU General Public License along withGNU Make; see the file COPYING. If not, write to the Free SoftwareFoundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. */#include "make.h"#include <assert.h>#include "dep.h"#include "filedef.h"#include "job.h"#include "commands.h"#include "variable.h"#include "debug.h"#include "hash.h"/* Remember whether snap_deps has been invoked: we need this to be sure wedon't add new rules (via $(eval ...)) afterwards. In the future it wouldbe nice to support this, but it means we'd need to re-run snap_deps() orat least its functionality... it might mean changing snap_deps() to be runper-file, so we can invoke it after the eval... or remembering which filesin the hash have been snapped (a new boolean flag?) and having snap_deps()only work on files which have not yet been snapped. */int snapped_deps = 0;/* Hash table of files the makefile knows how to make. */static unsigned longfile_hash_1 (const void *key){return_ISTRING_HASH_1 (((struct file const *) key)->hname);}static unsigned longfile_hash_2 (const void *key){return_ISTRING_HASH_2 (((struct file const *) key)->hname);}static intfile_hash_cmp (const void *x, const void *y){return_ISTRING_COMPARE (((struct file const *) x)->hname,((struct file const *) y)->hname);}#ifndef FILE_BUCKETS#define FILE_BUCKETS 1007#endifstatic struct hash_table files;/* Whether or not .SECONDARY with no prerequisites was given. */static int all_secondary = 0;/* Access the hash table of all file records.lookup_file given a name, return the struct file * for that name,or nil if there is none.enter_file similar, but create one if there is none. */struct file *lookup_file (char *name){register struct file *f;struct file file_key;#if defined(VMS) && !defined(WANT_CASE_SENSITIVE_TARGETS)register char *lname, *ln;#endifassert (*name != '\0');/* This is also done in parse_file_seq, so this is redundantfor names read from makefiles. It is here for names passedon the command line. */#ifdef VMS# ifndef WANT_CASE_SENSITIVE_TARGETSif (*name != '.'){register char *n;lname = (char *) malloc (strlen (name) + 1);for (n = name, ln = lname; *n != '\0'; ++n, ++ln)*ln = isupper ((unsigned char)*n) ? tolower ((unsigned char)*n) : *n;*ln = '\0';name = lname;}# endifwhile (name[0] == '[' && name[1] == ']' && name[2] != '\0')name += 2;#endifwhile (name[0] == '.' && name[1] == '/' && name[2] != '\0'){name += 2;while (*name == '/')/* Skip following slashes: ".//foo" is "foo", not "/foo". */++name;}if (*name == '\0')/* It was all slashes after a dot. */#ifdef VMSname = "[]";#else#ifdef _AMIGAname = "";#elsename = "./";#endif /* AMIGA */#endif /* VMS */file_key.hname = name;f = (struct file *) hash_find_item (&files, &file_key);#if defined(VMS) && !defined(WANT_CASE_SENSITIVE_TARGETS)if (*name != '.')free (lname);#endifreturn f;}struct file *enter_file (char *name){register struct file *f;register struct file *new;register struct file **file_slot;struct file file_key;#if defined(VMS) && !defined(WANT_CASE_SENSITIVE_TARGETS)char *lname, *ln;#endifassert (*name != '\0');#if defined(VMS) && !defined(WANT_CASE_SENSITIVE_TARGETS)if (*name != '.'){register char *n;lname = (char *) malloc (strlen (name) + 1);for (n = name, ln = lname; *n != '\0'; ++n, ++ln){if (isupper ((unsigned char)*n))*ln = tolower ((unsigned char)*n);else*ln = *n;}*ln = 0;/* Creates a possible leak, old value of name is unreachable, but Icurrently don't know how to fix it. */name = lname;}#endiffile_key.hname = name;file_slot = (struct file **) hash_find_slot (&files, &file_key);f = *file_slot;if (! HASH_VACANT (f) && !f->double_colon){#if defined(VMS) && !defined(WANT_CASE_SENSITIVE_TARGETS)if (*name != '.')free (lname);#endifreturn f;}new = (struct file *) xmalloc (sizeof (struct file));bzero ((char *) new, sizeof (struct file));new->name = new->hname = name;new->update_status = -1;if (HASH_VACANT (f)){new->last = new;hash_insert_at (&files, new, file_slot);}else{/* There is already a double-colon entry for this file. */new->double_colon = f;f->last->prev = new;f->last = new;}return new;}/* Rename FILE to NAME. This is not as simple as resettingthe `name' member, since it must be put in a new hash bucket,and possibly merged with an existing file called NAME. */voidrename_file (struct file *from_file, char *to_hname){rehash_file (from_file, to_hname);while (from_file){from_file->name = from_file->hname;from_file = from_file->prev;}}/* Rehash FILE to NAME. This is not as simple as resettingthe `hname' member, since it must be put in a new hash bucket,and possibly merged with an existing file called NAME. */voidrehash_file (struct file *from_file, char *to_hname){struct file file_key;struct file **file_slot;struct file *to_file;struct file *deleted_file;struct file *f;file_key.hname = to_hname;if (0 == file_hash_cmp (from_file, &file_key))return;file_key.hname = from_file->hname;while (from_file->renamed != 0)from_file = from_file->renamed;if (file_hash_cmp (from_file, &file_key))/* hname changed unexpectedly */abort ();deleted_file = hash_delete (&files, from_file);if (deleted_file != from_file)/* from_file isn't the one stored in files */abort ();file_key.hname = to_hname;file_slot = (struct file **) hash_find_slot (&files, &file_key);to_file = *file_slot;from_file->hname = to_hname;for (f = from_file->double_colon; f != 0; f = f->prev)f->hname = to_hname;if (HASH_VACANT (to_file))hash_insert_at (&files, from_file, file_slot);else{/* TO_FILE already exists under TO_HNAME.We must retain TO_FILE and merge FROM_FILE into it. */if (from_file->cmds != 0){if (to_file->cmds == 0)to_file->cmds = from_file->cmds;else if (from_file->cmds != to_file->cmds){/* We have two sets of commands. We will go with theone given in the rule explicitly mentioning this name,but give a message to let the user know what's going on. */if (to_file->cmds->fileinfo.filenm != 0)error (&from_file->cmds->fileinfo,_("Commands were specified for file `%s' at %s:%lu,"),from_file->name, to_file->cmds->fileinfo.filenm,to_file->cmds->fileinfo.lineno);elseerror (&from_file->cmds->fileinfo,_("Commands for file `%s' were found by implicit rule search,"),from_file->name);error (&from_file->cmds->fileinfo,_("but `%s' is now considered the same file as `%s'."),from_file->name, to_hname);error (&from_file->cmds->fileinfo,_("Commands for `%s' will be ignored in favor of those for `%s'."),to_hname, from_file->name);}}/* Merge the dependencies of the two files. */if (to_file->deps == 0)to_file->deps = from_file->deps;else{register struct dep *deps = to_file->deps;while (deps->next != 0)deps = deps->next;deps->next = from_file->deps;}merge_variable_set_lists (&to_file->variables, from_file->variables);if (to_file->double_colon && from_file->is_target && !from_file->double_colon)fatal (NILF, _("can't rename single-colon `%s' to double-colon `%s'"),from_file->name, to_hname);if (!to_file->double_colon && from_file->double_colon){if (to_file->is_target)fatal (NILF, _("can't rename double-colon `%s' to single-colon `%s'"),from_file->name, to_hname);elseto_file->double_colon = from_file->double_colon;}if (from_file->last_mtime > to_file->last_mtime)/* %%% Kludge so -W wins on a file that gets vpathized. */to_file->last_mtime = from_file->last_mtime;to_file->mtime_before_update = from_file->mtime_before_update;#define MERGE(field) to_file->field |= from_file->fieldMERGE (precious);MERGE (tried_implicit);MERGE (updating);MERGE (updated);MERGE (is_target);MERGE (cmd_target);MERGE (phony);MERGE (ignore_vpath);#undef MERGEfrom_file->renamed = to_file;}}/* Remove all nonprecious intermediate files.If SIG is nonzero, this was caused by a fatal signal,meaning that a different message will be printed, andthe message will go to stderr rather than stdout. */voidremove_intermediates (int sig){register struct file **file_slot;register struct file **file_end;int doneany = 0;/* If there's no way we will ever remove anything anyway, punt early. */if (question_flag || touch_flag || all_secondary)return;if (sig && just_print_flag)return;file_slot = (struct file **) files.ht_vec;file_end = file_slot + files.ht_size;for ( ; file_slot < file_end; file_slot++)if (! HASH_VACANT (*file_slot)){register struct file *f = *file_slot;/* Is this file eligible for automatic deletion?Yes, IFF: it's marked intermediate, it's not secondary, it wasn'tgiven on the command-line, and it's either a -include makefile orit's not precious. */if (f->intermediate && (f->dontcare || !f->precious)&& !f->secondary && !f->cmd_target){int status;if (f->update_status == -1)/* If nothing would have created this file yet,don't print an "rm" command for it. */continue;if (just_print_flag)status = 0;else{status = unlink (f->name);if (status < 0 && errno == ENOENT)continue;}if (!f->dontcare){if (sig)error (NILF, _("*** Deleting intermediate file `%s'"), f->name);else{if (! doneany)DB (DB_BASIC, (_("Removing intermediate files...\n")));if (!silent_flag){if (! doneany){fputs ("rm ", stdout);doneany = 1;}elseputchar (' ');fputs (f->name, stdout);fflush (stdout);}}if (status < 0)perror_with_name ("unlink: ", f->name);}}}if (doneany && !sig){putchar ('\n');fflush (stdout);}}struct dep *parse_prereqs (char *p){struct dep *new = (struct dep *)multi_glob (parse_file_seq (&p, '|', sizeof (struct dep), 1),sizeof (struct dep));if (*p){/* Files that follow '|' are "order-only" prerequisites that satisfy thedependency by existing: their modification times are irrelevant. */struct dep *ood;++p;ood = (struct dep *)multi_glob (parse_file_seq (&p, '\0', sizeof (struct dep), 1),sizeof (struct dep));if (! new)new = ood;else{struct dep *dp;for (dp = new; dp->next != NULL; dp = dp->next);dp->next = ood;}for (; ood != NULL; ood = ood->next)ood->ignore_mtime = 1;}return new;}/* Set the intermediate flag. */static voidset_intermediate (const void *item){struct file *f = (struct file *) item;f->intermediate = 1;}/* Expand and parse each dependency line. */static voidexpand_deps (struct file *f){struct dep *d;struct dep *old = f->deps;char *file_stem = f->stem;unsigned int last_dep_has_cmds = f->updating;int initialized = 0;f->updating = 0;f->deps = 0;for (d = old; d != 0; d = d->next){struct dep *new, *d1;char *p;if (! d->name)continue;/* Create the dependency list.If we're not doing 2nd expansion, then it's just the name. */if (! d->need_2nd_expansion)p = d->name;else{/* If it's from a static pattern rule, convert the patterns into"$*" so they'll expand properly. */if (d->staticpattern){char *o;char *buffer = variable_expand ("");o = subst_expand (buffer, d->name, "%", "$*", 1, 2, 0);free (d->name);d->name = savestring (buffer, o - buffer);d->staticpattern = 0; /* Clear staticpattern so that we don'tre-expand %s below. */}/* We are going to do second expansion so initialize file variablesfor the file. Since the stem for static pattern rules comes fromindividual dep lines, we will temporarily set f->stem to d->stem.*/if (!initialized){initialize_file_variables (f, 0);initialized = 1;}if (d->stem != 0)f->stem = d->stem;set_file_variables (f);p = variable_expand_for_file (d->name, f);if (d->stem != 0)f->stem = file_stem;}/* Parse the prerequisites. */new = parse_prereqs (p);/* If this dep list was from a static pattern rule, expand the %s. Weuse patsubst_expand to translate the prerequisites' patterns intoplain prerequisite names. */if (new && d->staticpattern){char *pattern = "%";char *buffer = variable_expand ("");struct dep *dp = new, *dl = 0;while (dp != 0){char *percent = find_percent (dp->name);if (percent){/* We have to handle empty stems specially, because thatwould be equivalent to $(patsubst %,dp->name,) whichwill always be empty. */if (d->stem[0] == '\0')/* This needs memmove() in ISO C. */bcopy (percent+1, percent, strlen (percent));else{char *o = patsubst_expand (buffer, d->stem, pattern,dp->name, pattern+1,percent+1);if (o == buffer)dp->name[0] = '\0';else{free (dp->name);dp->name = savestring (buffer, o - buffer);}}/* If the name expanded to the empty string, ignore it. */if (dp->name[0] == '\0'){struct dep *df = dp;if (dp == new)dp = new = new->next;elsedp = dl->next = dp->next;/* @@ Are we leaking df->name here? */df->name = 0;free_dep (df);continue;}}dl = dp;dp = dp->next;}}/* Enter them as files. */for (d1 = new; d1 != 0; d1 = d1->next){d1->file = lookup_file (d1->name);if (d1->file == 0)d1->file = enter_file (d1->name);elsefree (d1->name);d1->name = 0;d1->staticpattern = 0;d1->need_2nd_expansion = 0;}/* Add newly parsed deps to f->deps. If this is the last dependencyline and this target has commands then put it in front so thelast dependency line (the one with commands) ends up being thefirst. This is important because people expect $< to hold firstprerequisite from the rule with commands. If it is not the lastdependency line or the rule does not have commands then link itat the end so it appears in makefile order. */if (new != 0){if (d->next == 0 && last_dep_has_cmds){struct dep **d_ptr;for (d_ptr = &new; *d_ptr; d_ptr = &(*d_ptr)->next);*d_ptr = f->deps;f->deps = new;}else{struct dep **d_ptr;for (d_ptr = &f->deps; *d_ptr; d_ptr = &(*d_ptr)->next);*d_ptr = new;}}}free_dep_chain (old);}/* For each dependency of each file, make the `struct dep' pointat the appropriate `struct file' (which may have to be created).Also mark the files depended on by .PRECIOUS, .PHONY, .SILENT,and various other special targets. */voidsnap_deps (void){struct file *f;struct file *f2;struct dep *d;struct file **file_slot_0;struct file **file_slot;struct file **file_end;/* Perform second expansion and enter each dependencyname as a file. *//* Expand .SUFFIXES first; it's dependencies are used for$$* calculation. */for (f = lookup_file (".SUFFIXES"); f != 0; f = f->prev)expand_deps (f);/* We must use hash_dump (), because within this loopwe might add new files to the table, possibly causingan in-situ table expansion. */file_slot_0 = (struct file **) hash_dump (&files, 0, 0);file_end = file_slot_0 + files.ht_fill;for (file_slot = file_slot_0; file_slot < file_end; file_slot++)for (f = *file_slot; f != 0; f = f->prev){if (strcmp (f->name, ".SUFFIXES") != 0)expand_deps (f);}free (file_slot_0);for (f = lookup_file (".PRECIOUS"); f != 0; f = f->prev)for (d = f->deps; d != 0; d = d->next)for (f2 = d->file; f2 != 0; f2 = f2->prev)f2->precious = 1;for (f = lookup_file (".LOW_RESOLUTION_TIME"); f != 0; f = f->prev)for (d = f->deps; d != 0; d = d->next)for (f2 = d->file; f2 != 0; f2 = f2->prev)f2->low_resolution_time = 1;for (f = lookup_file (".PHONY"); f != 0; f = f->prev)for (d = f->deps; d != 0; d = d->next)for (f2 = d->file; f2 != 0; f2 = f2->prev){/* Mark this file as phony nonexistent target. */f2->phony = 1;f2->is_target = 1;f2->last_mtime = NONEXISTENT_MTIME;f2->mtime_before_update = NONEXISTENT_MTIME;}for (f = lookup_file (".INTERMEDIATE"); f != 0; f = f->prev){/* .INTERMEDIATE with deps listedmarks those deps as intermediate files. */for (d = f->deps; d != 0; d = d->next)for (f2 = d->file; f2 != 0; f2 = f2->prev)f2->intermediate = 1;/* .INTERMEDIATE with no deps does nothing.Marking all files as intermediates is uselesssince the goal targets would be deleted after they are built. */}for (f = lookup_file (".SECONDARY"); f != 0; f = f->prev){/* .SECONDARY with deps listedmarks those deps as intermediate filesin that they don't get rebuilt if not actually needed;but unlike real intermediate files,these are not deleted after make finishes. */if (f->deps)for (d = f->deps; d != 0; d = d->next)for (f2 = d->file; f2 != 0; f2 = f2->prev)f2->intermediate = f2->secondary = 1;/* .SECONDARY with no deps listed marks *all* files that way. */else{all_secondary = 1;hash_map (&files, set_intermediate);}}f = lookup_file (".EXPORT_ALL_VARIABLES");if (f != 0 && f->is_target)export_all_variables = 1;f = lookup_file (".IGNORE");if (f != 0 && f->is_target){if (f->deps == 0)ignore_errors_flag = 1;elsefor (d = f->deps; d != 0; d = d->next)for (f2 = d->file; f2 != 0; f2 = f2->prev)f2->command_flags |= COMMANDS_NOERROR;}f = lookup_file (".SILENT");if (f != 0 && f->is_target){if (f->deps == 0)silent_flag = 1;elsefor (d = f->deps; d != 0; d = d->next)for (f2 = d->file; f2 != 0; f2 = f2->prev)f2->command_flags |= COMMANDS_SILENT;}f = lookup_file (".NOTPARALLEL");if (f != 0 && f->is_target)not_parallel = 1;#ifndef NO_MINUS_C_MINUS_O/* If .POSIX was defined, remove OUTPUT_OPTION to comply. *//* This needs more work: what if the user sets this in the makefile?if (posix_pedantic)define_variable (STRING_SIZE_TUPLE("OUTPUT_OPTION"), "", o_default, 1);*/#endif/* Remember that we've done this. */snapped_deps = 1;}/* Set the `command_state' member of FILE and all its `also_make's. */voidset_command_state (struct file *file, enum cmd_state state){struct dep *d;file->command_state = state;for (d = file->also_make; d != 0; d = d->next)d->file->command_state = state;}/* Convert an external file timestamp to internal form. */FILE_TIMESTAMPfile_timestamp_cons (const char *fname, time_t s, int ns){int offset = ORDINARY_MTIME_MIN + (FILE_TIMESTAMP_HI_RES ? ns : 0);FILE_TIMESTAMP product = (FILE_TIMESTAMP) s << FILE_TIMESTAMP_LO_BITS;FILE_TIMESTAMP ts = product + offset;if (! (s <= FILE_TIMESTAMP_S (ORDINARY_MTIME_MAX)&& product <= ts && ts <= ORDINARY_MTIME_MAX)){char buf[FILE_TIMESTAMP_PRINT_LEN_BOUND + 1];ts = s <= OLD_MTIME ? ORDINARY_MTIME_MIN : ORDINARY_MTIME_MAX;file_timestamp_sprintf (buf, ts);error (NILF, _("%s: Timestamp out of range; substituting %s"),fname ? fname : _("Current time"), buf);}return ts;}/* Return the current time as a file timestamp, setting *RESOLUTION toits resolution. */FILE_TIMESTAMPfile_timestamp_now (int *resolution){int r;time_t s;int ns;/* Don't bother with high-resolution clocks if file timestamps haveonly one-second resolution. The code below should work, but it'snot worth the hassle of debugging it on hosts where it fails. */#if FILE_TIMESTAMP_HI_RES# if HAVE_CLOCK_GETTIME && defined CLOCK_REALTIME{struct timespec timespec;if (clock_gettime (CLOCK_REALTIME, ×pec) == 0){r = 500000000; // 0.5 secondss = timespec.tv_sec;ns = timespec.tv_nsec;goto got_time;}}# endif# if HAVE_GETTIMEOFDAY{struct timeval timeval;if (gettimeofday (&timeval, 0) == 0){r = 1000;s = timeval.tv_sec;ns = timeval.tv_usec * 1000;goto got_time;}}# endif#endifr = 1000000000;s = time ((time_t *) 0);ns = 0;#if FILE_TIMESTAMP_HI_RESgot_time:#endif*resolution = r;return file_timestamp_cons (0, s, ns);}/* Place into the buffer P a printable representation of the filetimestamp TS. */voidfile_timestamp_sprintf (char *p, FILE_TIMESTAMP ts){time_t t = FILE_TIMESTAMP_S (ts);struct tm *tm = localtime (&t);if (tm)sprintf (p, "%04d-%02d-%02d %02d:%02d:%02d",tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,tm->tm_hour, tm->tm_min, tm->tm_sec);else if (t < 0)sprintf (p, "%ld", (long) t);elsesprintf (p, "%lu", (unsigned long) t);p += strlen (p);/* Append nanoseconds as a fraction, but remove trailing zeros.We don't know the actual timestamp resolution, since clock_getresapplies only to local times, whereas this timestamp might comefrom a remote filesystem. So removing trailing zeros is thebest guess that we can do. */sprintf (p, ".%09d", FILE_TIMESTAMP_NS (ts));p += strlen (p) - 1;while (*p == '0')p--;p += *p != '.';*p = '\0';}/* Print the data base of files. */static voidprint_file (const void *item){struct file *f = (struct file *) item;struct dep *d;struct dep *ood = 0;putchar ('\n');if (!f->is_target)puts (_("# Not a target:"));printf ("%s:%s", f->name, f->double_colon ? ":" : "");/* Print all normal dependencies; note any order-only deps. */for (d = f->deps; d != 0; d = d->next)if (! d->ignore_mtime)printf (" %s", dep_name (d));else if (! ood)ood = d;/* Print order-only deps, if we have any. */if (ood){printf (" | %s", dep_name (ood));for (d = ood->next; d != 0; d = d->next)if (d->ignore_mtime)printf (" %s", dep_name (d));}putchar ('\n');if (f->precious)puts (_("# Precious file (prerequisite of .PRECIOUS)."));if (f->phony)puts (_("# Phony target (prerequisite of .PHONY)."));if (f->cmd_target)puts (_("# Command-line target."));if (f->dontcare)puts (_("# A default, MAKEFILES, or -include/sinclude makefile."));puts (f->tried_implicit? _("# Implicit rule search has been done."): _("# Implicit rule search has not been done."));if (f->stem != 0)printf (_("# Implicit/static pattern stem: `%s'\n"), f->stem);if (f->intermediate)puts (_("# File is an intermediate prerequisite."));if (f->also_make != 0){fputs (_("# Also makes:"), stdout);for (d = f->also_make; d != 0; d = d->next)printf (" %s", dep_name (d));putchar ('\n');}if (f->last_mtime == UNKNOWN_MTIME)puts (_("# Modification time never checked."));else if (f->last_mtime == NONEXISTENT_MTIME)puts (_("# File does not exist."));else if (f->last_mtime == OLD_MTIME)puts (_("# File is very old."));else{char buf[FILE_TIMESTAMP_PRINT_LEN_BOUND + 1];file_timestamp_sprintf (buf, f->last_mtime);printf (_("# Last modified %s\n"), buf);}puts (f->updated? _("# File has been updated.") : _("# File has not been updated."));switch (f->command_state){case cs_running:puts (_("# Commands currently running (THIS IS A BUG)."));break;case cs_deps_running:puts (_("# Dependencies commands running (THIS IS A BUG)."));break;case cs_not_started:case cs_finished:switch (f->update_status){case -1:break;case 0:puts (_("# Successfully updated."));break;case 1:assert (question_flag);puts (_("# Needs to be updated (-q is set)."));break;case 2:puts (_("# Failed to be updated."));break;default:puts (_("# Invalid value in `update_status' member!"));fflush (stdout);fflush (stderr);abort ();}break;default:puts (_("# Invalid value in `command_state' member!"));fflush (stdout);fflush (stderr);abort ();}if (f->variables != 0)print_file_variables (f);if (f->cmds != 0)print_commands (f->cmds);if (f->prev)print_file ((const void *) f->prev);}voidprint_file_data_base (void){puts (_("\n# Files"));hash_map (&files, print_file);fputs (_("\n# files hash-table stats:\n# "), stdout);hash_print_stats (&files, stdout);}#define EXPANSION_INCREMENT(_l) ((((_l) / 500) + 1) * 500)char *build_target_list (char *value){static unsigned long last_targ_count = 0;if (files.ht_fill != last_targ_count){unsigned long max = EXPANSION_INCREMENT (strlen (value));unsigned long len;char *p;struct file **fp = (struct file **) files.ht_vec;struct file **end = &fp[files.ht_size];/* Make sure we have at least MAX bytes in the allocated buffer. */value = xrealloc (value, max);p = value;len = 0;for (; fp < end; ++fp)if (!HASH_VACANT (*fp) && (*fp)->is_target){struct file *f = *fp;int l = strlen (f->name);len += l + 1;if (len > max){unsigned long off = p - value;max += EXPANSION_INCREMENT (l + 1);value = xrealloc (value, max);p = &value[off];}bcopy (f->name, p, l);p += l;*(p++) = ' ';}*(p-1) = '\0';last_targ_count = files.ht_fill;}return value;}voidinit_hash_files (void){hash_init (&files, 1000, file_hash_1, file_hash_2, file_hash_cmp);}/* EOF */