Fixed bug in implicit rule prerequisite evaluation code. Added test.

ChangeLog

@@ -1,3 +1,11 @@
+2004-09-21  Boris Kolpackov  <boris@kolpackov.net>
+
+	* file.c (snap_deps): Mark .PHONY prerequisites as targets.
+
+	* implicit.c (pattern_search): When considering an implicit rule's
+	prerequisite check that it is actually a target rather then
+	just an entry in the file hashtable.
+
 2004-09-21  Paul D. Smith  <psmith@gnu.org>
 
 	* read.c (readstring): Fix some logic errors in backslash handling.

file.c

@@ -455,8 +455,9 @@ snap_deps (void)
     for (d = f->deps; d != 0; d = d->next)
       for (f2 = d->file; f2 != 0; f2 = f2->prev)
 	{
-	  /* Mark this file as phony and nonexistent.  */
+	  /* Mark this file as phony nonexistent target.  */
 	  f2->phony = 1;
+          f2->is_target = 1;
 	  f2->last_mtime = NONEXISTENT_MTIME;
 	  f2->mtime_before_update = NONEXISTENT_MTIME;
 	}

implicit.c

@@ -342,6 +342,8 @@ pattern_search (struct file *file, int archive,
 	  deps_found = 0;
 	  for (dep = rule->deps; dep != 0; dep = dep->next)
 	    {
+              struct file *f;
+
 	      /* If the dependency name has a %, substitute the stem.  */
 	      p = strchr (dep_name (dep), '%');
 	      if (p != 0)
@@ -396,7 +398,7 @@ pattern_search (struct file *file, int archive,
 		 directory (the one gotten by prepending FILENAME's directory),
 		 so it might actually exist.  */
 
-	      if (lookup_file (p) != 0
+	      if (((f = lookup_file (p)) != 0 && f->is_target)
 		  || ((!dep->changed || check_lastslash) && file_exists_p (p)))
 		{
 		  found_files_im[deps_found] = dep->ignore_mtime;

tests/ChangeLog

@@ -1,3 +1,11 @@
+2004-09-21  Boris Kolpackov  <boris@kolpackov.net>
+
+	* run_make_tests.pl: Change `#!/usr/local/bin/perl' to be
+	`#!/usr/bin/env perl'.
+	
+	* scripts/features/implicit_prereq_eval: Test implicit rule
+	prerequisite evaluation code.
+
 2004-09-21  Paul D. Smith  <psmith@gnu.org>
 
 	* run_make_tests.pl (run_make_test): Enhance to allow the make

tests/run_make_tests.pl

@@ -1,4 +1,4 @@
-#!/usr/local/bin/perl
+#!/usr/bin/env perl
 # -*-perl-*-
 
 # Test driver for the Make test suite

tests/scripts/features/implicit_prereq_eval

@@ -0,0 +1,64 @@
+$description = "Test implicit rule prerequisite evaluation code.";
+
+$details = "The makefile created by this test has a set of implicit rule
+ pairs with the first rule usually not applying because its prerequisites
+ cannot be made and the second rule which should succeed.";
+
+open(MAKEFILE,"> $makefile");
+
+# The contents of the Makefile ...
+
+print MAKEFILE <<EOF;
+
+.PHONY: all
+
+all: case.1 case.2 case.3
+
+a: void
+
+# 1 - existing file
+#
+%.1: void
+	\@false
+
+%.1: $makefile
+	\@true
+
+
+# 2 - phony
+#
+%.2: void
+	\@false
+
+%.2: 2.phony
+	\@true
+
+.PHONY: 2.phony
+
+
+# 3 - implicit-phony
+#
+%.3: void
+	\@false
+
+%.3: 3.implicit-phony
+	\@true
+
+3.implicit-phony:
+
+EOF
+
+close(MAKEFILE);
+
+&run_make_with_options($makefile,
+                       "",
+                       &get_logfile,
+                       0);
+
+
+# This makefile doesn't produce anything except exit code.
+#
+&compare_output("",&get_logfile(1));
+
+# This tells the test driver that the perl test script executed properly.
+1;