* cygmalloc.h: Remove MORECORE_CANNOT_TRIM. It's not true. # cygwin.din:

Export mallinfo.  # malloc_wrapper.cc (mallinfo): New function.

winsup/cygwin/malloc_wrapper.cc

@@ -25,6 +25,8 @@ details. */
 #include "sync.h"
 #include "perprocess.h"
 #include "cygmalloc.h"
+#include <malloc.h>
+extern "C" struct mallinfo dlmallinfo ();
 
 /* we provide these stubs to call into a user's
    provided malloc if there is one - otherwise
@@ -276,6 +278,22 @@ malloc_stats ()
   return;
 }
 
+extern "C" struct mallinfo
+mallinfo ()
+{
+  struct mallinfo m;
+  if (!use_internal_malloc)
+    set_errno (ENOSYS);
+  else
+    {
+      __malloc_lock ();
+      m = dlmallinfo ();
+      __malloc_unlock ();
+    }
+
+  return m;
+}
+
 extern "C" char *
 strdup (const char *s)
 {