This should get the linux port to work...

src/backend/port/dynloader/linux.h

@@ -0,0 +1,42 @@
+/*-------------------------------------------------------------------------
+ *
+ * port-protos.h--
+ *	  port-specific prototypes for SunOS 4
+ *
+ *
+ * Copyright (c) 1994, Regents of the University of California
+ *
+ * $Id: linux.h,v 1.1 1997/12/20 02:36:18 scrappy Exp $
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef PORT_PROTOS_H
+#define PORT_PROTOS_H
+
+#include "fmgr.h"				/* for func_ptr */
+#include "utils/dynamic_loader.h"
+#ifdef LINUX_ELF
+#include "dlfcn.h"
+#endif
+
+/* dynloader.c */
+
+#ifndef LINUX_ELF
+#ifndef HAVE_DLD_H
+#define pg_dlsym(handle, funcname)		(NULL)
+#define pg_dlclose(handle)			   ({})
+#else
+#define pg_dlsym(handle, funcname)		((func_ptr) dld_get_func((funcname)))
+#define pg_dlclose(handle)			   ({ dld_unlink_by_file(handle, 1); free(handle); })
+#endif
+#else
+/* #define		pg_dlopen(f)	dlopen(f, 1) */
+#define pg_dlopen(f)	dlopen(f, 2)
+#define pg_dlsym		dlsym
+#define pg_dlclose		dlclose
+#define pg_dlerror		dlerror
+#endif
+
+/* port.c */
+
+#endif							/* PORT_PROTOS_H */