Fix order-only prerequisites for pattern rules. (Savannah patch #2349).

Add a regression test for this.

Older libraries don't allow *alloc(0), so make sure we don't ever do that.

.cvsignore

@@ -11,7 +11,7 @@ makebook*
 *.dep *.dvi *.toc *.aux *.log
 *.cp *.cps *.fn *.fns *.vr *.vrs *.tp *.tps *.ky *.kys *.pg *.pgs
 
-README README.DOS README.W32
+README README.DOS README.W32 README.OS2
 aclocal.m4 autom4te.cache
 config.h.in config.h config.status config.cache configure
 Makefile.in Makefile

ChangeLog

@@ -1,3 +1,10 @@
+2004-01-07  Paul D. Smith  <psmith@gnu.org>
+
+	* implicit.c (pattern_search): When matching an implicit rule,
+	remember which dependencies have the ignore_mtime flag set.
+	Original fix provided in Savannah patch #2349, by Benoit
+	Poulot-Cazajous <Benoit.Poulot-Cazajous@jaluna.com>.
+
 2003-11-02  Paul D. Smith  <psmith@gnu.org>
 
 	* function.c (func_if): Strip all the trailing whitespace from the
@@ -17,6 +24,11 @@
 	(get-config/config.guess get-config/config.sub): Get these files
 	from the Savannah config project instead of ftp.gnu.org.
 
+2003-08-22  Paul D. Smith  <psmith@gnu.org>
+
+	* misc.c (xmalloc, xrealloc): Add one to 0 sizes, to cater to
+	systems which don't yet implement the C89 standard :-/.
+
 2003-07-18  Paul D. Smith  <psmith@gnu.org>
 
 	* dir.c (directory_contents_hash_1, directory_contents_hash_1)

implicit.c

@@ -103,6 +103,8 @@ pattern_search (struct file *file, int archive,
 
   /* This buffer records all the dependencies actually found for a rule.  */
   char **found_files = (char **) alloca (max_pattern_deps * sizeof (char *));
+  /* This list notes if the associated dep has an "ignore_mtime" flag set.  */
+  unsigned char *found_files_im = (unsigned char *) alloca (max_pattern_deps * sizeof (unsigned char));
   /* Number of dep names now in FOUND_FILES.  */
   unsigned int deps_found = 0;
 
@@ -397,6 +399,7 @@ pattern_search (struct file *file, int archive,
 	      if (lookup_file (p) != 0
 		  || ((!dep->changed || check_lastslash) && file_exists_p (p)))
 		{
+		  found_files_im[deps_found] = dep->ignore_mtime;
 		  found_files[deps_found++] = xstrdup (p);
 		  continue;
 		}
@@ -408,6 +411,7 @@ pattern_search (struct file *file, int archive,
 		  DBS (DB_IMPLICIT,
                        (_("Found prerequisite `%s' as VPATH `%s'\n"), p, vp));
 		  strcpy (vp, p);
+		  found_files_im[deps_found] = dep->ignore_mtime;
 		  found_files[deps_found++] = vp;
 		  continue;
 		}
@@ -437,11 +441,11 @@ pattern_search (struct file *file, int archive,
 		      intermediate_file->name = p;
 		      intermediate_files[deps_found] = intermediate_file;
 		      intermediate_file = 0;
+		      found_files_im[deps_found] = dep->ignore_mtime;
 		      /* Allocate an extra copy to go in FOUND_FILES,
 			 because every elt of FOUND_FILES is consumed
 			 or freed later.  */
-		      found_files[deps_found] = xstrdup (p);
-		      ++deps_found;
+		      found_files[deps_found++] = xstrdup (p);
 		      continue;
 		    }
 
@@ -541,7 +545,7 @@ pattern_search (struct file *file, int archive,
 	}
 
       dep = (struct dep *) xmalloc (sizeof (struct dep));
-      dep->ignore_mtime = 0;
+      dep->ignore_mtime = found_files_im[deps_found];
       s = found_files[deps_found];
       if (recursions == 0)
 	{

misc.c

@@ -357,7 +357,8 @@ pfatal_with_name (const char *name)
 char *
 xmalloc (unsigned int size)
 {
-  char *result = (char *) malloc (size);
+  /* Make sure we don't allocate 0, for pre-ANSI libraries.  */
+  char *result = (char *) malloc (size ? size : 1);
   if (result == 0)
     fatal (NILF, _("virtual memory exhausted"));
   return result;
@@ -370,6 +371,8 @@ xrealloc (char *ptr, unsigned int size)
   char *result;
 
   /* Some older implementations of realloc() don't conform to ANSI.  */
+  if (! size)
+    size = 1;
   result = ptr ? realloc (ptr, size) : malloc (size);
   if (result == 0)
     fatal (NILF, _("virtual memory exhausted"));

tests/ChangeLog

@@ -1,3 +1,8 @@
+2004-01-07  Paul D. Smith  <psmith@gnu.org>
+
+	* scripts/features/order_only: Test order-only prerequisites in
+	pattern rules (patch #2349).
+
 2003-11-02  Paul D. Smith  <psmith@gnu.org>
 
 	* scripts/functions/if: Test if on conditionals with trailing

tests/scripts/features/order_only

@@ -109,4 +109,39 @@ $answer = "touch baz\n";
 
 unlink(qw(foo baz));
 
+# Test order-only in pattern rules
+
+$makefile4 = &get_tmpfile;
+
+open(MAKEFILE,"> $makefile4");
+
+print MAKEFILE <<'EOF';
+%.w : %.x | baz
+	@echo '$$^ = $^'
+	@echo '$$| = $|'
+	touch $@
+
+all: foo.w
+
+.PHONY: baz
+foo.x baz:
+	touch $@
+EOF
+
+close(MAKEFILE);
+
+# TEST #7 -- make sure the parser was correct.
+
+&run_make_with_options($makefile4, "", &get_logfile);
+$answer = "touch foo.x\ntouch baz\n\$^ = foo.x\n\$| = baz\ntouch foo.w\n";
+&compare_output($answer,&get_logfile(1));
+
+# TEST #8 -- now we do it again: this time foo.w won't be built
+
+&run_make_with_options($makefile4, "", &get_logfile);
+$answer = "touch baz\n";
+&compare_output($answer,&get_logfile(1));
+
+unlink(qw(foo.w foo.x baz));
+
 1;