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Diffstat (limited to 'implicit.c')
| -rw-r--r-- | implicit.c | 998 |
1 files changed, 998 insertions, 0 deletions
diff --git a/implicit.c b/implicit.c new file mode 100644 index 0000000..8e1d541 --- /dev/null +++ b/implicit.c @@ -0,0 +1,998 @@ +/* Implicit rule searching for GNU Make. +Copyright (C) 1988-2014 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/>. */ + +#include "makeint.h" +#include "filedef.h" +#include "rule.h" +#include "dep.h" +#include "debug.h" +#include "variable.h" +#include "job.h" /* struct child, used inside commands.h */ +#include "commands.h" /* set_file_variables */ + +static int pattern_search (struct file *file, int archive, + unsigned int depth, unsigned int recursions); + +/* For a FILE which has no commands specified, try to figure out some + from the implicit pattern rules. + Returns 1 if a suitable implicit rule was found, + after modifying FILE to contain the appropriate commands and deps, + or returns 0 if no implicit rule was found. */ + +int +try_implicit_rule (struct file *file, unsigned int depth) +{ + DBF (DB_IMPLICIT, _("Looking for an implicit rule for '%s'.\n")); + + /* The order of these searches was previously reversed. My logic now is + that since the non-archive search uses more information in the target + (the archive search omits the archive name), it is more specific and + should come first. */ + + if (pattern_search (file, 0, depth, 0)) + return 1; + +#ifndef NO_ARCHIVES + /* If this is an archive member reference, use just the + archive member name to search for implicit rules. */ + if (ar_name (file->name)) + { + DBF (DB_IMPLICIT, + _("Looking for archive-member implicit rule for '%s'.\n")); + if (pattern_search (file, 1, depth, 0)) + return 1; + } +#endif + + return 0; +} + + +/* Scans the BUFFER for the next word with whitespace as a separator. + Returns the pointer to the beginning of the word. LENGTH hold the + length of the word. */ + +static const char * +get_next_word (const char *buffer, unsigned int *length) +{ + const char *p = buffer, *beg; + char c; + + /* Skip any leading whitespace. */ + while (isblank ((unsigned char)*p)) + ++p; + + beg = p; + c = *(p++); + + if (c == '\0') + return 0; + + + /* We already found the first value of "c", above. */ + while (1) + { + char closeparen; + int count; + + switch (c) + { + case '\0': + case ' ': + case '\t': + goto done_word; + + case '$': + c = *(p++); + if (c == '$') + break; + + /* This is a variable reference, so read it to the matching + close paren. */ + + if (c == '(') + closeparen = ')'; + else if (c == '{') + closeparen = '}'; + else + /* This is a single-letter variable reference. */ + break; + + for (count = 0; *p != '\0'; ++p) + { + if (*p == c) + ++count; + else if (*p == closeparen && --count < 0) + { + ++p; + break; + } + } + break; + + case '|': + goto done; + + default: + break; + } + + c = *(p++); + } + done_word: + --p; + + done: + if (length) + *length = p - beg; + + return beg; +} + +/* This structure stores information about the expanded prerequisites for a + pattern rule. NAME is always set to the strcache'd name of the prereq. + FILE and PATTERN will be set for intermediate files only. IGNORE_MTIME is + copied from the prerequisite we expanded. + */ +struct patdeps + { + const char *name; + const char *pattern; + struct file *file; + unsigned int ignore_mtime : 1; + }; + +/* This structure stores information about pattern rules that we need + to try. +*/ +struct tryrule + { + struct rule *rule; + + /* Index of the target in this rule that matched the file. */ + unsigned int matches; + + /* Stem length for this match. */ + unsigned int stemlen; + + /* Definition order of this rule. Used to implement stable sort.*/ + unsigned int order; + + /* Nonzero if the LASTSLASH logic was used in matching this rule. */ + char checked_lastslash; + }; + +int +stemlen_compare (const void *v1, const void *v2) +{ + const struct tryrule *r1 = v1; + const struct tryrule *r2 = v2; + int r = r1->stemlen - r2->stemlen; + return r != 0 ? r : (int)(r1->order - r2->order); +} + +/* Search the pattern rules for a rule with an existing dependency to make + FILE. If a rule is found, the appropriate commands and deps are put in FILE + and 1 is returned. If not, 0 is returned. + + If ARCHIVE is nonzero, FILE->name is of the form "LIB(MEMBER)". A rule for + "(MEMBER)" will be searched for, and "(MEMBER)" will not be chopped up into + directory and filename parts. + + If an intermediate file is found by pattern search, the intermediate file + is set up as a target by the recursive call and is also made a dependency + of FILE. + + DEPTH is used for debugging messages. */ + +static int +pattern_search (struct file *file, int archive, + unsigned int depth, unsigned int recursions) +{ + /* Filename we are searching for a rule for. */ + const char *filename = archive ? strchr (file->name, '(') : file->name; + + /* Length of FILENAME. */ + unsigned int namelen = strlen (filename); + + /* The last slash in FILENAME (or nil if there is none). */ + const char *lastslash; + + /* This is a file-object used as an argument in + recursive calls. It never contains any data + except during a recursive call. */ + struct file *int_file = 0; + + /* List of dependencies found recursively. */ + unsigned int max_deps = max_pattern_deps; + struct patdeps *deplist = xmalloc (max_deps * sizeof (struct patdeps)); + struct patdeps *pat = deplist; + + /* Names of possible dependencies are constructed in this buffer. */ + char *depname = alloca (namelen + max_pattern_dep_length); + + /* The start and length of the stem of FILENAME for the current rule. */ + const char *stem = 0; + unsigned int stemlen = 0; + unsigned int fullstemlen = 0; + + /* Buffer in which we store all the rules that are possibly applicable. */ + struct tryrule *tryrules = xmalloc (num_pattern_rules * max_pattern_targets + * sizeof (struct tryrule)); + + /* Number of valid elements in TRYRULES. */ + unsigned int nrules; + + /* The index in TRYRULES of the rule we found. */ + unsigned int foundrule; + + /* Nonzero if should consider intermediate files as dependencies. */ + int intermed_ok; + + /* Nonzero if we have initialized file variables for this target. */ + int file_vars_initialized = 0; + + /* Nonzero if we have matched a pattern-rule target + that is not just '%'. */ + int specific_rule_matched = 0; + + unsigned int ri; /* uninit checks OK */ + struct rule *rule; + + char *pathdir = NULL; + unsigned long pathlen; + + PATH_VAR (stem_str); /* @@ Need to get rid of stem, stemlen, etc. */ + +#ifndef NO_ARCHIVES + if (archive || ar_name (filename)) + lastslash = 0; + else +#endif + { + /* Set LASTSLASH to point at the last slash in FILENAME + but not counting any slash at the end. (foo/bar/ counts as + bar/ in directory foo/, not empty in directory foo/bar/.) */ +#ifdef VMS + lastslash = strrchr (filename, ']'); + if (lastslash == 0) + lastslash = strrchr (filename, ':'); +#else + lastslash = strrchr (filename, '/'); +#ifdef HAVE_DOS_PATHS + /* Handle backslashes (possibly mixed with forward slashes) + and the case of "d:file". */ + { + char *bslash = strrchr (filename, '\\'); + if (lastslash == 0 || bslash > lastslash) + lastslash = bslash; + if (lastslash == 0 && filename[0] && filename[1] == ':') + lastslash = filename + 1; + } +#endif +#endif + if (lastslash != 0 && lastslash[1] == '\0') + lastslash = 0; + } + + pathlen = lastslash - filename + 1; + + /* First see which pattern rules match this target and may be considered. + Put them in TRYRULES. */ + + nrules = 0; + for (rule = pattern_rules; rule != 0; rule = rule->next) + { + unsigned int ti; + + /* If the pattern rule has deps but no commands, ignore it. + Users cancel built-in rules by redefining them without commands. */ + if (rule->deps != 0 && rule->cmds == 0) + continue; + + /* If this rule is in use by a parent pattern_search, + don't use it here. */ + if (rule->in_use) + { + DBS (DB_IMPLICIT, (_("Avoiding implicit rule recursion.\n"))); + continue; + } + + for (ti = 0; ti < rule->num; ++ti) + { + const char *target = rule->targets[ti]; + const char *suffix = rule->suffixes[ti]; + int check_lastslash; + + /* Rules that can match any filename and are not terminal + are ignored if we're recursing, so that they cannot be + intermediate files. */ + if (recursions > 0 && target[1] == '\0' && !rule->terminal) + continue; + + if (rule->lens[ti] > namelen) + /* It can't possibly match. */ + continue; + + /* From the lengths of the filename and the pattern parts, + find the stem: the part of the filename that matches the %. */ + stem = filename + (suffix - target - 1); + stemlen = namelen - rule->lens[ti] + 1; + + /* Set CHECK_LASTSLASH if FILENAME contains a directory + prefix and the target pattern does not contain a slash. */ + + check_lastslash = 0; + if (lastslash) + { +#ifdef VMS + check_lastslash = (strchr (target, ']') == 0 + && strchr (target, ':') == 0); +#else + check_lastslash = strchr (target, '/') == 0; +#ifdef HAVE_DOS_PATHS + /* Didn't find it yet: check for DOS-type directories. */ + if (check_lastslash) + { + char *b = strchr (target, '\\'); + check_lastslash = !(b || (target[0] && target[1] == ':')); + } +#endif +#endif + } + if (check_lastslash) + { + /* If so, don't include the directory prefix in STEM here. */ + if (pathlen > stemlen) + continue; + stemlen -= pathlen; + stem += pathlen; + } + + /* Check that the rule pattern matches the text before the stem. */ + if (check_lastslash) + { + if (stem > (lastslash + 1) + && !strneq (target, lastslash + 1, stem - lastslash - 1)) + continue; + } + else if (stem > filename + && !strneq (target, filename, stem - filename)) + continue; + + /* Check that the rule pattern matches the text after the stem. + We could test simply use streq, but this way we compare the + first two characters immediately. This saves time in the very + common case where the first character matches because it is a + period. */ + if (*suffix != stem[stemlen] + || (*suffix != '\0' && !streq (&suffix[1], &stem[stemlen + 1]))) + continue; + + /* Record if we match a rule that not all filenames will match. */ + if (target[1] != '\0') + specific_rule_matched = 1; + + /* A rule with no dependencies and no commands exists solely to set + specific_rule_matched when it matches. Don't try to use it. */ + if (rule->deps == 0 && rule->cmds == 0) + continue; + + /* Record this rule in TRYRULES and the index of the matching + target in MATCHES. If several targets of the same rule match, + that rule will be in TRYRULES more than once. */ + tryrules[nrules].rule = rule; + tryrules[nrules].matches = ti; + tryrules[nrules].stemlen = stemlen + (check_lastslash ? pathlen : 0); + tryrules[nrules].order = nrules; + tryrules[nrules].checked_lastslash = check_lastslash; + ++nrules; + } + } + + /* Bail out early if we haven't found any rules. */ + if (nrules == 0) + goto done; + + /* Sort the rules to place matches with the shortest stem first. This + way the most specific rules will be tried first. */ + if (nrules > 1) + qsort (tryrules, nrules, sizeof (struct tryrule), stemlen_compare); + + /* If we have found a matching rule that won't match all filenames, + retroactively reject any non-"terminal" rules that do always match. */ + if (specific_rule_matched) + for (ri = 0; ri < nrules; ++ri) + if (!tryrules[ri].rule->terminal) + { + unsigned int j; + for (j = 0; j < tryrules[ri].rule->num; ++j) + if (tryrules[ri].rule->targets[j][1] == '\0') + { + tryrules[ri].rule = 0; + break; + } + } + + /* Try each rule once without intermediate files, then once with them. */ + for (intermed_ok = 0; intermed_ok < 2; ++intermed_ok) + { + pat = deplist; + + /* Try each pattern rule till we find one that applies. If it does, + expand its dependencies (as substituted) and chain them in DEPS. */ + for (ri = 0; ri < nrules; ri++) + { + struct dep *dep; + int check_lastslash; + unsigned int failed = 0; + int file_variables_set = 0; + unsigned int deps_found = 0; + /* NPTR points to the part of the prereq we haven't processed. */ + const char *nptr = 0; + const char *dir = NULL; + int order_only = 0; + unsigned int matches; + + rule = tryrules[ri].rule; + + /* RULE is nil when we discover that a rule, already placed in + TRYRULES, should not be applied. */ + if (rule == 0) + continue; + + /* Reject any terminal rules if we're looking to make intermediate + files. */ + if (intermed_ok && rule->terminal) + continue; + + /* From the lengths of the filename and the matching pattern parts, + find the stem: the part of the filename that matches the %. */ + matches = tryrules[ri].matches; + stem = filename + (rule->suffixes[matches] + - rule->targets[matches]) - 1; + stemlen = (namelen - rule->lens[matches]) + 1; + check_lastslash = tryrules[ri].checked_lastslash; + if (check_lastslash) + { + stem += pathlen; + stemlen -= pathlen; + + /* We need to add the directory prefix, so set it up. */ + if (! pathdir) + { + pathdir = alloca (pathlen + 1); + memcpy (pathdir, filename, pathlen); + pathdir[pathlen] = '\0'; + } + dir = pathdir; + } + + if (stemlen > GET_PATH_MAX) + { + DBS (DB_IMPLICIT, (_("Stem too long: '%.*s'.\n"), + (int) stemlen, stem)); + continue; + } + + DBS (DB_IMPLICIT, (_("Trying pattern rule with stem '%.*s'.\n"), + (int) stemlen, stem)); + + strncpy (stem_str, stem, stemlen); + stem_str[stemlen] = '\0'; + + /* If there are no prerequisites, then this rule matches. */ + if (rule->deps == 0) + break; + + /* Temporary assign STEM to file->stem (needed to set file + variables below). */ + file->stem = stem_str; + + /* Mark this rule as in use so a recursive pattern_search won't try + to use it. */ + rule->in_use = 1; + + /* Try each prerequisite; see if it exists or can be created. We'll + build a list of prereq info in DEPLIST. Due to 2nd expansion we + may have to process multiple prereqs for a single dep entry. */ + + pat = deplist; + dep = rule->deps; + nptr = dep_name (dep); + while (1) + { + struct dep *dl, *d; + char *p; + + /* If we're out of name to parse, start the next prereq. */ + if (! nptr) + { + dep = dep->next; + if (dep == 0) + break; + nptr = dep_name (dep); + } + + /* If we don't need a second expansion, just replace the %. */ + if (! dep->need_2nd_expansion) + { + p = strchr (nptr, '%'); + if (p == 0) + strcpy (depname, nptr); + else + { + char *o = depname; + if (check_lastslash) + { + memcpy (o, filename, pathlen); + o += pathlen; + } + memcpy (o, nptr, p - nptr); + o += p - nptr; + memcpy (o, stem_str, stemlen); + o += stemlen; + strcpy (o, p + 1); + } + + /* Parse the expanded string. It might have wildcards. */ + p = depname; + dl = PARSE_SIMPLE_SEQ (&p, struct dep); + for (d = dl; d != NULL; d = d->next) + { + ++deps_found; + d->ignore_mtime = dep->ignore_mtime; + } + + /* We've used up this dep, so next time get a new one. */ + nptr = 0; + } + + /* We have to perform second expansion on this prereq. In an + ideal world we would take the dependency line, substitute the + stem, re-expand the whole line and chop it into individual + prerequisites. Unfortunately this won't work because of the + "check_lastslash" twist. Instead, we will have to go word by + word, taking $()'s into account. For each word we will + substitute the stem, re-expand, chop it up, and, if + check_lastslash != 0, add the directory part to each + resulting prerequisite. */ + else + { + int add_dir = 0; + unsigned int len; + struct dep **dptr; + + nptr = get_next_word (nptr, &len); + if (nptr == 0) + continue; + + /* See this is a transition to order-only prereqs. */ + if (! order_only && len == 1 && nptr[0] == '|') + { + order_only = 1; + nptr += len; + continue; + } + + /* If the dependency name has %, substitute the stem. If we + just replace % with the stem value then later, when we do + the 2nd expansion, we will re-expand this stem value + again. This is not good if you have certain characters + in your stem (like $). + + Instead, we will replace % with $* and allow the second + expansion to take care of it for us. This way (since $* + is a simple variable) there won't be additional + re-expansion of the stem. */ + + p = lindex (nptr, nptr + len, '%'); + if (p == 0) + { + memcpy (depname, nptr, len); + depname[len] = '\0'; + } + else + { + unsigned int i = p - nptr; + memcpy (depname, nptr, i); + memcpy (depname + i, "$*", 2); + memcpy (depname + i + 2, p + 1, len - i - 1); + depname[len + 2 - 1] = '\0'; + + if (check_lastslash) + add_dir = 1; + } + + /* Set up for the next word. */ + nptr += len; + + /* Initialize and set file variables if we haven't already + done so. */ + if (!file_vars_initialized) + { + initialize_file_variables (file, 0); + set_file_variables (file); + file_vars_initialized = 1; + } + /* Update the stem value in $* for this rule. */ + else if (!file_variables_set) + { + define_variable_for_file ( + "*", 1, file->stem, o_automatic, 0, file); + file_variables_set = 1; + } + + /* Perform the 2nd expansion. */ + p = variable_expand_for_file (depname, file); + dptr = &dl; + + /* Parse the results into a deps list. */ + do + { + /* Parse the expanded string. */ + struct dep *dp = PARSE_FILE_SEQ (&p, struct dep, + order_only ? MAP_NUL : MAP_PIPE, + add_dir ? dir : NULL, PARSEFS_NONE); + *dptr = dp; + + for (d = dp; d != NULL; d = d->next) + { + ++deps_found; + if (order_only) + d->ignore_mtime = 1; + dptr = &d->next; + } + + /* If we stopped due to an order-only token, note it. */ + if (*p == '|') + { + order_only = 1; + ++p; + } + } + while (*p != '\0'); + } + + /* If there are more than max_pattern_deps prerequisites (due to + 2nd expansion), reset it and realloc the arrays. */ + + if (deps_found > max_deps) + { + unsigned int l = pat - deplist; + /* This might have changed due to recursion. */ + max_pattern_deps = MAX(max_pattern_deps, deps_found); + max_deps = max_pattern_deps; + deplist = xrealloc (deplist, + max_deps * sizeof (struct patdeps)); + pat = deplist + l; + } + + /* Go through the nameseq and handle each as a prereq name. */ + for (d = dl; d != 0; d = d->next) + { + struct dep *expl_d; + int is_rule = d->name == dep_name (dep); + + if (file_impossible_p (d->name)) + { + /* If this prereq has already been ruled "impossible", + then the rule fails. Don't bother trying it on the + second pass either since we know that will fail. */ + DBS (DB_IMPLICIT, + (is_rule + ? _("Rejecting impossible rule prerequisite '%s'.\n") + : _("Rejecting impossible implicit prerequisite '%s'.\n"), + d->name)); + tryrules[ri].rule = 0; + + failed = 1; + break; + } + + memset (pat, '\0', sizeof (struct patdeps)); + pat->ignore_mtime = d->ignore_mtime; + + DBS (DB_IMPLICIT, + (is_rule + ? _("Trying rule prerequisite '%s'.\n") + : _("Trying implicit prerequisite '%s'.\n"), d->name)); + + /* If this prereq is also explicitly mentioned for FILE, + skip all tests below since it must be built no matter + which implicit rule we choose. */ + + for (expl_d = file->deps; expl_d != 0; expl_d = expl_d->next) + if (streq (dep_name (expl_d), d->name)) + break; + if (expl_d != 0) + { + (pat++)->name = d->name; + continue; + } + + /* The DEP->changed flag says that this dependency resides + in a nonexistent directory. So we normally can skip + looking for the file. However, if CHECK_LASTSLASH is + set, then the dependency file we are actually looking for + is in a different directory (the one gotten by prepending + FILENAME's directory), so it might actually exist. */ + + /* @@ dep->changed check is disabled. */ + if (lookup_file (d->name) != 0 + /*|| ((!dep->changed || check_lastslash) && */ + || file_exists_p (d->name)) + { + (pat++)->name = d->name; + continue; + } + + /* This code, given FILENAME = "lib/foo.o", dependency name + "lib/foo.c", and VPATH=src, searches for + "src/lib/foo.c". */ + { + const char *vname = vpath_search (d->name, 0, NULL, NULL); + if (vname) + { + DBS (DB_IMPLICIT, + (_("Found prerequisite '%s' as VPATH '%s'\n"), + d->name, vname)); + (pat++)->name = d->name; + continue; + } + } + + /* We could not find the file in any place we should look. + Try to make this dependency as an intermediate file, but + only on the second pass. */ + + if (intermed_ok) + { + DBS (DB_IMPLICIT, + (_("Looking for a rule with intermediate file '%s'.\n"), + d->name)); + + if (int_file == 0) + int_file = alloca (sizeof (struct file)); + memset (int_file, '\0', sizeof (struct file)); + int_file->name = d->name; + + if (pattern_search (int_file, + 0, + depth + 1, + recursions + 1)) + { + pat->pattern = int_file->name; + int_file->name = d->name; + pat->file = int_file; + int_file = 0; + (pat++)->name = d->name; + continue; + } + + /* If we have tried to find P as an intermediate file + and failed, mark that name as impossible so we won't + go through the search again later. */ + if (int_file->variables) + free_variable_set (int_file->variables); + if (int_file->pat_variables) + free_variable_set (int_file->pat_variables); + file_impossible (d->name); + } + + /* A dependency of this rule does not exist. Therefore, this + rule fails. */ + failed = 1; + break; + } + + /* Free the ns chain. */ + free_dep_chain (dl); + + if (failed) + break; + } + + /* Reset the stem in FILE. */ + + file->stem = 0; + + /* This rule is no longer 'in use' for recursive searches. */ + rule->in_use = 0; + + if (! failed) + /* This pattern rule does apply. Stop looking for one. */ + break; + + /* This pattern rule does not apply. Keep looking. */ + } + + /* If we found an applicable rule without intermediate files, don't try + with them. */ + if (ri < nrules) + break; + + rule = 0; + } + + /* RULE is nil if the loop went through the list but everything failed. */ + if (rule == 0) + goto done; + + foundrule = ri; + + /* If we are recursing, store the pattern that matched FILENAME in + FILE->name for use in upper levels. */ + + if (recursions > 0) + /* Kludge-o-matic */ + file->name = rule->targets[tryrules[foundrule].matches]; + + /* DEPLIST lists the prerequisites for the rule we found. This includes the + intermediate files, if any. Convert them into entries on the deps-chain + of FILE. */ + + while (pat-- > deplist) + { + struct dep *dep; + const char *s; + + if (pat->file != 0) + { + /* If we need to use an intermediate file, make sure it is entered + as a target, with the info that was found for it in the recursive + pattern_search call. We know that the intermediate file did not + already exist as a target; therefore we can assume that the deps + and cmds of F below are null before we change them. */ + + struct file *imf = pat->file; + struct file *f = lookup_file (imf->name); + + /* We don't want to delete an intermediate file that happened + to be a prerequisite of some (other) target. Mark it as + precious. */ + if (f != 0) + f->precious = 1; + else + f = enter_file (imf->name); + + f->deps = imf->deps; + f->cmds = imf->cmds; + f->stem = imf->stem; + f->variables = imf->variables; + f->pat_variables = imf->pat_variables; + f->pat_searched = imf->pat_searched; + f->also_make = imf->also_make; + f->is_target = 1; + f->intermediate = 1; + f->tried_implicit = 1; + + imf = lookup_file (pat->pattern); + if (imf != 0 && imf->precious) + f->precious = 1; + + for (dep = f->deps; dep != 0; dep = dep->next) + { + dep->file = enter_file (dep->name); + dep->name = 0; + dep->file->tried_implicit |= dep->changed; + } + } + + dep = alloc_dep (); + dep->ignore_mtime = pat->ignore_mtime; + s = strcache_add (pat->name); + if (recursions) + dep->name = s; + else + { + dep->file = lookup_file (s); + if (dep->file == 0) + dep->file = enter_file (s); + } + + if (pat->file == 0 && tryrules[foundrule].rule->terminal) + { + /* If the file actually existed (was not an intermediate file), and + the rule that found it was a terminal one, then we want to mark + the found file so that it will not have implicit rule search done + for it. If we are not entering a 'struct file' for it now, we + indicate this with the 'changed' flag. */ + if (dep->file == 0) + dep->changed = 1; + else + dep->file->tried_implicit = 1; + } + + dep->next = file->deps; + file->deps = dep; + } + + if (!tryrules[foundrule].checked_lastslash) + { + /* Always allocate new storage, since STEM might be on the stack for an + intermediate file. */ + file->stem = strcache_add_len (stem, stemlen); + fullstemlen = stemlen; + } + else + { + int dirlen = (lastslash + 1) - filename; + char *sp; + + /* We want to prepend the directory from + the original FILENAME onto the stem. */ + fullstemlen = dirlen + stemlen; + sp = alloca (fullstemlen + 1); + memcpy (sp, filename, dirlen); + memcpy (sp + dirlen, stem, stemlen); + sp[fullstemlen] = '\0'; + file->stem = strcache_add (sp); + } + + file->cmds = rule->cmds; + file->is_target = 1; + + /* Set precious flag. */ + { + struct file *f = lookup_file (rule->targets[tryrules[foundrule].matches]); + if (f && f->precious) + file->precious = 1; + } + + /* If this rule builds other targets, too, put the others into FILE's + 'also_make' member. */ + + if (rule->num > 1) + for (ri = 0; ri < rule->num; ++ri) + if (ri != tryrules[foundrule].matches) + { + char *nm = alloca (rule->lens[ri] + fullstemlen + 1); + char *p = nm; + struct file *f; + struct dep *new = alloc_dep (); + + /* GKM FIMXE: handle '|' here too */ + memcpy (p, rule->targets[ri], + rule->suffixes[ri] - rule->targets[ri] - 1); + p += rule->suffixes[ri] - rule->targets[ri] - 1; + memcpy (p, file->stem, fullstemlen); + p += fullstemlen; + memcpy (p, rule->suffixes[ri], + rule->lens[ri] - (rule->suffixes[ri] - rule->targets[ri])+1); + new->name = strcache_add (nm); + new->file = enter_file (new->name); + new->next = file->also_make; + + /* Set precious flag. */ + f = lookup_file (rule->targets[ri]); + if (f && f->precious) + new->file->precious = 1; + + /* Set the is_target flag so that this file is not treated as + intermediate by the pattern rule search algorithm and + file_exists_p cannot pick it up yet. */ + new->file->is_target = 1; + + file->also_make = new; + } + + done: + free (tryrules); + free (deplist); + + return rule != 0; +} |