Fix bug #940 (from the Savannah bug tracker): make sure that target-

specific variables work correctly in conjunction with double-colon
targets.

5 files changed, 94 insertions, 6 deletions

diff --git a/ChangeLog b/ChangeLog
index 9637eb1..e67c819 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,18 @@
+2002-09-17  Paul D. Smith  <psmith@gnu.org>
+
+	Fix Bug #940 (plus another bug I found while looking at this):
+
+	* read.c (record_target_var): enter_file() will add a new entry if
+	it's a double-colon target: we don't want to do that in this
+	situation.  Invoke lookup_file() and only enter_file() if it does
+	not already exist.  If the file we get back is a double-colon then
+	add this variable to the "root" double-colon target.
+
+	* variable.c (initialize_file_variables): If this file is a
+	double-colon target but is not the "root" target, then initialize
+	the root and make the root's variable list the parent of our
+	variable list.
+
 2002-09-12  Paul D. Smith  <psmith@gnu.org>
 
 	* Makefile.am (loadavg_SOURCES, loadavg.c): Tiptoe around automake
diff --git a/read.c b/read.c
index dd930f7..3488524 100644
--- a/read.c
+++ b/read.c
@@ -1671,8 +1671,16 @@ record_target_var (filenames, defn, two_colon, origin, flocp)
         {
           struct file *f;
 
-          /* Get a file reference for this file, and initialize it.  */
-          f = enter_file (name);
+          /* Get a file reference for this file, and initialize it.
+             We don't want to just call enter_file() because that allocates a
+             new entry if the file is a double-colon, which we don't want in
+             this situation.  */
+          f = lookup_file (name);
+          if (!f)
+            f = enter_file (name);
+          else if (f->double_colon)
+            f = f->double_colon;
+
           initialize_file_variables (f, 1);
           vlist = f->variables;
           fname = f->name;
diff --git a/tests/ChangeLog b/tests/ChangeLog
index fd6ef2a..a2edc50 100644
--- a/tests/ChangeLog
+++ b/tests/ChangeLog
@@ -1,3 +1,9 @@
+2002-09-17  Paul D. Smith  <psmith@gnu.org>
+
+	* scripts/features/targetvars: Tests for Bug #940: test
+	target-specific and pattern-specific variables in conjunction with
+	double-colon targets.
+
 2002-09-10  Paul D. Smith  <psmith@gnu.org>
 
 	* test_driver.pl (compare_output): Match the new format for time
diff --git a/tests/scripts/features/targetvars b/tests/scripts/features/targetvars
index a70d3ab..06328c2 100644
--- a/tests/scripts/features/targetvars
+++ b/tests/scripts/features/targetvars
@@ -194,5 +194,50 @@ close(MAKEFILE);
 $answer = "bar snafu bar\n";
 &compare_output($answer, &get_logfile(1));
 
+# Test #13
+# Test double-colon rules with target-specific variable values
+
+$makefile6 = &get_tmpfile;
+
+open(MAKEFILE, "> $makefile6");
+print MAKEFILE <<'EOF';
+W = bad
+X = bad
+foo: W = ok
+foo:: ; @echo $(W) $(X) $(Y) $(Z)
+foo:: ; @echo $(W) $(X) $(Y) $(Z)
+foo: X = ok
+
+Y = foo
+bar: foo
+bar: Y = bar
+
+Z = nopat
+ifdef PATTERN
+  fo% : Z = pat
+endif
+
+EOF
+close(MAKEFILE);
+
+&run_make_with_options("$makefile6", "foo", &get_logfile);
+$answer = "ok ok foo nopat\nok ok foo nopat\n";
+&compare_output($answer, &get_logfile(1));
+
+# Test #14
+# Test double-colon rules with target-specific variable values and
+# inheritance
+
+&run_make_with_options("$makefile6", "bar", &get_logfile);
+$answer = "ok ok bar nopat\nok ok bar nopat\n";
+&compare_output($answer, &get_logfile(1));
+
+# Test #15
+# Test double-colon rules with pattern-specific variable values
+
+&run_make_with_options("$makefile6", "foo PATTERN=yes", &get_logfile);
+$answer = "ok ok foo pat\nok ok foo pat\n";
+&compare_output($answer, &get_logfile(1));
+
 
 1;
diff --git a/variable.c b/variable.c
index 27a38e2..308ad75 100644
--- a/variable.c
+++ b/variable.c
@@ -372,9 +372,12 @@ lookup_variable_in_set (name, length, set)
 
 /* Initialize FILE's variable set list.  If FILE already has a variable set
    list, the topmost variable set is left intact, but the the rest of the
-   chain is replaced with FILE->parent's setlist.  If we're READing a
-   makefile, don't do the pattern variable search now, since the pattern
-   variable might not have been defined yet.  */
+   chain is replaced with FILE->parent's setlist.  If FILE is a double-colon
+   rule, then we will use the "root" double-colon target's variable set as the
+   parent of FILE's variable set.
+
+   If we're READing a makefile, don't do the pattern variable search now,
+   since the pattern variable might not have been defined yet.  */
 
 void
 initialize_file_variables (file, reading)
@@ -389,10 +392,21 @@ initialize_file_variables (file, reading)
 	xmalloc (sizeof (struct variable_set_list));
       l->set = (struct variable_set *) xmalloc (sizeof (struct variable_set));
       hash_init (&l->set->table, PERFILE_VARIABLE_BUCKETS,
-			     variable_hash_1, variable_hash_2, variable_hash_cmp);
+                 variable_hash_1, variable_hash_2, variable_hash_cmp);
       file->variables = l;
     }
 
+  /* If this is a double-colon, then our "parent" is the "root" target for
+     this double-colon rule.  Since that rule has the same name, parent,
+     etc. we can just use its variables as the "next" for ours.  */
+
+  if (file->double_colon && file->double_colon != file)
+    {
+      initialize_file_variables (file->double_colon, reading);
+      l->next = file->double_colon->variables;
+      return;
+    }
+
   if (file->parent == 0)
     l->next = &global_setlist;
   else