Add needed functions to glibc-compat for pkg

ports/glibc-compat/src/dirfd.c

Index: ports/glibc-compat/src/dirfd.c
diff --git a/ports/glibc-compat/src/dirfd.c b/ports/glibc-compat/src/dirfd.c
new file mode 100644
index 0000000000000000000000000000000000000000..0da98ef6154cdcee0b6db905cd84fe6dc69297a3
--- /dev/null
+++ b/ports/glibc-compat/src/dirfd.c
@@ -0,0 +1,45 @@
+/*-
+ * Copyright (c) 2011 Gleb Kurtsou <gleb@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD: release/10.1.0/lib/libc/gen/dirfd.c 235649 2012-05-19 14:30:49Z
+ * gleb $
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD: release/10.1.0/lib/libc/gen/dirfd.c 235649 2012-05-19 \
+14:30:49Z gleb $");
+
+#include <sys/param.h>
+
+#include <dirent.h>
+
+// pull from freebsd 10.1 lib/libc/gen/gen-private.h
+#define _dirfd(dirp) ((dirp)->dd_fd)
+
+int
+dirfd(DIR *dirp)
+{
+  return (_dirfd(dirp));
+}