This is the minimal version of the Darwin support patch from

Bruce Hartzler <bruceh@mail.utexas.edu>.  It contains shared library
support, regression test map, and the usual template files.  The dynamic
loader is missing, the spin lock code apparently doesn't assemble due to
syntax problems, and semaphores are to be hoped for from Apple.

src/backend/port/dynloader/darwin.c

@@ -0,0 +1,36 @@
+/*
+ * This is a place holder until someone supplies a dynamic loader
+ * interface for this platform.
+ *
+ * $Header: /cvsroot/pgsql/src/backend/port/dynloader/darwin.c,v 1.1 2000/10/31 19:55:19 petere Exp $
+ */
+
+#include "postgres.h"
+#include "fmgr.h"
+#include "utils/dynamic_loader.h"
+#include "dynloader.h"
+
+void *
+pg_dlopen(char *filename)
+{
+	return (void *) NULL;
+}
+
+PGFunction
+pg_dlsym(void *handle, char *funcname)
+{
+	return NULL;
+}
+
+void
+pg_dlclose(void *handle)
+{
+}
+
+char *
+pg_dlerror()
+{
+	static char errmsg[] = "the dynamic loader for darwin doesn't exist yet";
+
+	return errmsg;
+}

src/backend/port/dynloader/darwin.h

@@ -0,0 +1,5 @@
+/* $Header: /cvsroot/pgsql/src/backend/port/dynloader/darwin.h,v 1.1 2000/10/31 19:55:19 petere Exp $ */
+void	   *pg_dlopen(char *filename);
+PGFunction	pg_dlsym(void *handle, char *funcname);
+void		pg_dlclose(void *handle);
+char	   *pg_dlerror();