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.

1 files changed, 4 insertions, 1 deletions

diff --git a/misc.c b/misc.c
index ef754e5..9e5a516 100644
--- a/misc.c
+++ b/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"));