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6ccf33cdbd
string into the strcache. As a side-effect, many more structure members and function arguments can/should be declared const. As mentioned in the changelog, unfortunately measurement shows that this change does not yet reduce memory. The problem is with secondary expansion: because of this we store all the prerequisites in the string cache twice. First we store the prerequisite string after initial expansion but before secondary expansion, then we store each individual file after secondary expansion and expand_deps(). I plan to change expand_deps() to be callable in either context (eval or snap_deps) then have non-second-expansion targets call expand_deps() during eval, so that we only need to store that dependency list once.
80 lines
2.8 KiB
C
80 lines
2.8 KiB
C
/* Definitions of dependency data structures for GNU Make.
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Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
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1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 Free Software
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Foundation, Inc.
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This file is part of GNU Make.
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GNU Make is free software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation; either version 2, or (at your option) any later version.
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GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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GNU Make; see the file COPYING. If not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. */
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/* Flag bits for the second argument to `read_makefile'.
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These flags are saved in the `changed' field of each
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`struct dep' in the chain returned by `read_all_makefiles'. */
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#define RM_NO_DEFAULT_GOAL (1 << 0) /* Do not set default goal. */
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#define RM_INCLUDED (1 << 1) /* Search makefile search path. */
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#define RM_DONTCARE (1 << 2) /* No error if it doesn't exist. */
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#define RM_NO_TILDE (1 << 3) /* Don't expand ~ in file name. */
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#define RM_NOFLAG 0
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/* Structure representing one dependency of a file.
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Each struct file's `deps' points to a chain of these,
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chained through the `next'. `stem' is the stem for this
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dep line of static pattern rule or NULL.
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Note that the first two words of this match a struct nameseq. */
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struct dep
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{
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struct dep *next;
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const char *name;
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const char *stem;
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struct file *file;
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unsigned int changed : 8;
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unsigned int ignore_mtime : 1;
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unsigned int staticpattern : 1;
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unsigned int need_2nd_expansion : 1;
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};
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/* Structure used in chains of names, for parsing and globbing. */
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struct nameseq
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{
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struct nameseq *next;
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const char *name;
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};
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struct nameseq *multi_glob (struct nameseq *chain, unsigned int size);
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#ifdef VMS
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struct nameseq *parse_file_seq ();
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#else
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struct nameseq *parse_file_seq (char **stringp, int stopchar, unsigned int size, int strip);
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#endif
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char *tilde_expand (const char *name);
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#ifndef NO_ARCHIVES
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struct nameseq *ar_glob (const char *arname, const char *member_pattern, unsigned int size);
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#endif
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#define dep_name(d) ((d)->name == 0 ? (d)->file->name : (d)->name)
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struct dep *alloc_dep (void);
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void free_dep (struct dep *d);
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struct dep *copy_dep_chain (const struct dep *d);
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void free_dep_chain (struct dep *d);
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void free_ns_chain (struct nameseq *n);
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struct dep *read_all_makefiles (const char **makefiles);
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int eval_buffer (char *buffer);
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int update_goal_chain (struct dep *goals);
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void uniquize_deps (struct dep *);
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