home *** CD-ROM | disk | FTP | other *** search
- /* Copyright (C) 1988, 1989, 1990, 1991, 1992 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, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- /* Codes in a variable definition saying where the definition came from.
- Increasing numeric values signify less-overridable definitions. */
- enum variable_origin
- {
- o_default, /* Variable from the default set. */
- o_env, /* Variable from environment. */
- o_file, /* Variable given in a makefile. */
- o_env_override, /* Variable from environment, if -e. */
- o_command, /* Variable given by user. */
- o_override, /* Variable from an `override' directive. */
- o_automatic, /* Automatic variable -- cannot be set. */
- o_invalid /* Core dump time. */
- };
-
- /* Structure that represents one variable definition.
- Each bucket of the hash table is a chain of these,
- chained through `next'. */
-
- struct variable
- {
- struct variable *next; /* Link in the chain. */
- char *name; /* Variable name. */
- char *value; /* Variable value. */
- enum variable_origin
- origin ENUM_BITFIELD (3); /* Variable origin. */
- unsigned int recursive:1; /* Gets recursively re-evaluated. */
- unsigned int expanding:1; /* Nonzero if currently being expanded. */
- enum
- {
- v_export, /* Export this variable. */
- v_noexport, /* Don't export this variable. */
- v_ifset, /* Export it if it has a non-default value. */
- v_default /* Decide in target_environment. */
- } export ENUM_BITFIELD (2);
- };
-
- /* Structure that represents a variable set. */
-
- struct variable_set
- {
- struct variable **table; /* Hash table of variables. */
- unsigned int buckets; /* Number of hash buckets in `table'. */
- };
-
- /* Structure that represents a list of variable sets. */
-
- struct variable_set_list
- {
- struct variable_set_list *next; /* Link in the chain. */
- struct variable_set *set; /* Variable set. */
- };
-
- extern struct variable_set_list *current_variable_set_list;
-
-
- extern void push_new_variable_scope (), pop_variable_scope ();
-
- extern int handle_function ();
-
- extern char *variable_buffer_output ();
- extern char *variable_expand (), *variable_expand_for_file ();
- extern char *allocated_variable_expand_for_file ();
- #define allocated_variable_expand(line) \
- allocated_variable_expand_for_file (line, (struct file *) 0)
- extern char *expand_argument ();
-
- extern void define_automatic_variables ();
- extern void initialize_file_variables ();
- extern void print_file_variables ();
-
- extern void merge_variable_set_lists ();
-
- extern struct variable *try_variable_definition ();
-
- extern struct variable *lookup_variable (), *define_variable ();
- extern struct variable *define_variable_for_file ();
-
- extern int pattern_matches ();
- extern char *subst_expand (), *patsubst_expand (), *recursively_expand ();
-
- extern char **target_environment ();
- extern int export_all_variables;
-