usr/src/cmd/make/bin/depvar.cc

   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 <libintl.h>
  30
  31 #include <mk/defs.h>
  32 #include <mksh/misc.h>          /* getmem() */
  33
  34 /*
  35  * This file deals with "Dependency Variables".
  36  * The "-V var" command line option is used to indicate
  37  * that var is a dependency variable.  Used in conjunction with
  38  * the -P option the user is asking if the named variables affect
  39  * the dependencies of the given target.
  40  */
  41
  42 struct _Depvar {
  43         Name            name;           /* Name of variable */
  44         struct _Depvar  *next;          /* Linked list */
  45         Boolean         cmdline;        /* Macro defined on the cmdline? */
  46 };
  47
  48 typedef struct _Depvar  *Depvar;
  49
  50 static  Depvar          depvar_list;
  51 static  Depvar          *bpatch = &depvar_list;
  52 static  Boolean         variant_deps;
  53
  54 /*
  55  * Add a name to the list.
  56  */
  57
  58 void
  59 depvar_add_to_list(Name name, Boolean cmdline)
  60 {
  61         Depvar          dv;
  62
  63         dv = ALLOC(Depvar);
  64         dv->name = name;
  65         dv->next = NULL;
  66         dv->cmdline = cmdline;
  67         *bpatch = dv;
  68         bpatch = &dv->next;
  69 }
  70
  71 /*
  72  * The macro `name' has been used in either the left-hand or
  73  * right-hand side of a dependency.  See if it is in the
  74  * list.  Two things are looked for.  Names given as args
  75  * to the -V list are checked so as to set the same/differ
  76  * output for the -P option.  Names given as macro=value
  77  * command-line args are checked and, if found, an NSE
  78  * warning is produced.
  79  */
  80 void
  81 depvar_dep_macro_used(Name name)
  82 {
  83         Depvar          dv;
  84
  85         for (dv = depvar_list; dv != NULL; dv = dv->next) {
  86                 if (name == dv->name) {
  87                         variant_deps = true;
  88                         break;
  89                 }
  90         }
  91 }
  92
  93
  94 /*
  95  * Print the results.  If any of the Dependency Variables
  96  * affected the dependencies then the dependencies potentially
  97  * differ because of these variables.
  98  */
  99 void
 100 depvar_print_results(void)
 101 {
 102         if (variant_deps) {
 103                 printf(gettext("differ\n"));
 104         } else {
 105                 printf(gettext("same\n"));
 106         }
 107 }
 108