1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 1995 Sun Microsystems, Inc. All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25 
  26 /*
  27  * Included files
  28  */
  29 #include <mk/defs.h>
  30 #include <mksh/misc.h>            /* getmem() */
  31 
  32 /*
  33  * This file deals with "Dependency Variables".
  34  * The "-V var" command line option is used to indicate
  35  * that var is a dependency variable.  Used in conjunction with
  36  * the -P option the user is asking if the named variables affect
  37  * the dependencies of the given target.
  38  */
  39 
  40 struct _Depvar {
  41         Name            name;           /* Name of variable */
  42         struct _Depvar  *next;          /* Linked list */
  43         Boolean         cmdline;        /* Macro defined on the cmdline? */
  44 };
  45 
  46 typedef struct _Depvar  *Depvar;
  47 
  48 static  Depvar          depvar_list;
  49 static  Depvar          *bpatch = &depvar_list;
  50 static  Boolean         variant_deps;
  51 
  52 /*
  53  * Add a name to the list.
  54  */
  55 
  56 void
  57 depvar_add_to_list(Name name, Boolean cmdline)
  58 {
  59         Depvar          dv;
  60 
  61         dv = ALLOC(Depvar);
  62         dv->name = name;
  63         dv->next = NULL;
  64         dv->cmdline = cmdline;
  65         *bpatch = dv;
  66         bpatch = &dv->next;
  67 }
  68 
  69 /*
  70  * The macro `name' has been used in either the left-hand or
  71  * right-hand side of a dependency.  See if it is in the
  72  * list.  Two things are looked for.  Names given as args
  73  * to the -V list are checked so as to set the same/differ
  74  * output for the -P option.  Names given as macro=value
  75  * command-line args are checked and, if found, an NSE
  76  * warning is produced.
  77  */
  78 void
  79 depvar_dep_macro_used(Name name)
  80 {
  81         Depvar          dv;
  82 
  83         for (dv = depvar_list; dv != NULL; dv = dv->next) {
  84                 if (name == dv->name) {
  85                         variant_deps = true;
  86                         break;
  87                 }
  88         }
  89 }
  90 
  91 
  92 /*
  93  * Print the results.  If any of the Dependency Variables
  94  * affected the dependencies then the dependencies potentially
  95  * differ because of these variables.
  96  */
  97 void
  98 depvar_print_results(void)
  99 {
 100         if (variant_deps) {
 101                 printf(catgets(catd, 1, 234, "differ\n"));
 102         } else {
 103                 printf(catgets(catd, 1, 235, "same\n"));
 104         }
 105 }
 106