Initial support for gambit-scheme v4.7.0

ports/gambc/build.sh

Index: ports/gambc/build.sh
diff --git a/ports/gambc/build.sh b/ports/gambc/build.sh
new file mode 100644
index 0000000000000000000000000000000000000000..7adf6ac5675054d260a68bff56ad41a56aa4a2dd
--- /dev/null
+++ b/ports/gambc/build.sh
@@ -0,0 +1,16 @@
+#!/bin/bash
+# Copyright (c) 2011 The Native Client Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+ConfigureStep() {
+  export BUILD_DIR=${NACL_PACKAGES_REPOSITORY}/${PACKAGE_DIR}
+  export NACL_CONFIGURE_PATH=./configure
+
+  if [ "${NACL_GLIBC}" != "1" ]; then
+    export LIBS=" -lglibc-compat"
+  else
+    export ac_cv_func_waitpid=yes
+  fi
+  DefaultConfigureStep --disable-debug --enable-single-host
+}