Allow re-targeting of naclports install

examples/games/nethack-3.4.3/nacl-nethack-3.4.3.sh

 #!/bin/bash
 # Copyright (c) 2012 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.
 #
 
 # nacl-nethack-343.sh
 #
 # usage:  nacl-nethack-343.sh
 #
 # this script downloads, patches, and builds nethack for Native Client
 #
 
 source pkg_info
 source ../../../build_tools/common.sh
 
 
 set -x
 
 
 CustomBuildStep() {
   Banner "Building ${PACKAGE_NAME}"
   # export the nacl tools
   export CC=${NACLCC}
   export CXX=${NACLCXX}
   # NOTE: we are using the non-standard vars NACL_CCFLAGS/NACL_LDFLAGS
   # because we are not running ./configure and the Makefile was hacked
   export NACL_CCFLAGS="-O"
-  export NACL_LDFLAGS=""
+  export NACL_LDFLAGS="${NACLPORTS_LDFLAGS}"
   if [ ${NACL_ARCH} = "pnacl" ] ; then
     export NACL_CCFLAGS="-O3 -g"
     export NACL_LDFLAGS="-O0 -static"
   fi
   export AR=${NACLAR}
   export RANLIB=${NACLRANLIB}
-  export PKG_CONFIG_PATH=${NACL_SDK_USR_LIB}/pkgconfig
-  export PKG_CONFIG_LIBDIR=${NACL_SDK_USR_LIB}
+  export PKG_CONFIG_PATH=${NACLPORTS_LIBDIR}/pkgconfig
+  export PKG_CONFIG_LIBDIR=${NACLPORTS_LIBDIR}
   export PATH=${NACL_BIN_PATH}:${PATH};
   export WINTTYLIB="-Wl,--whole-archive"
   export WINTTYLIB="$WINTTYLIB -lnacl-mounts -lncurses -lppapi -lppapi_cpp"
   export WINTTYLIB="$WINTTYLIB -Wl,--no-whole-archive"
-  export NACL_SDK_USR_INCLUDE
+  export NACLPORTS_INCLUDE
   export STRNCMPI=1
   local PACKAGE_DIR="${NACL_PACKAGES_REPOSITORY}/${PACKAGE_NAME}"
   ChangeDir ${PACKAGE_DIR}
   cp ${START_DIR}/nethack_pepper.cc ${PACKAGE_DIR}/src
   bash sys/unix/setup.sh
   make
   make install
   Banner "Installing ${PACKAGE_NAME}"
   local PUBLISH_DIR="${NACL_PACKAGES_PUBLISH}/${PACKAGE_NAME}"
   MakeDir ${PUBLISH_DIR}
@@ skipping 12 matching lines @@
         *.nexe \
         -L ${NACL_TOOLCHAIN_ROOT}/x86_64-nacl/lib32 \
         -L ${NACL_TOOLCHAIN_ROOT}/x86_64-nacl/lib64 \
         -D ${NACL_TOOLCHAIN_ROOT}/bin/x86_64-nacl-objdump \
         -s . \
         -o nethack.nmf
     popd
   else
     cp ${START_DIR}/nethack.nmf ${ASSEMBLY_DIR}
   fi
-  cp ${NACL_SDK_USR_LIB}/nacl-mounts/*.js ${ASSEMBLY_DIR}
+  cp ${NACLPORTS_LIBDIR}/nacl-mounts/*.js ${ASSEMBLY_DIR}
   cp ${START_DIR}/manifest.json ${ASSEMBLY_DIR}
   cp ${START_DIR}/icon_16.png ${ASSEMBLY_DIR}
   cp ${START_DIR}/icon_48.png ${ASSEMBLY_DIR}
   cp ${START_DIR}/icon_128.png ${ASSEMBLY_DIR}
   ChangeDir ${PUBLISH_DIR}
   zip -r nethack-3.4.3.zip nethack
 }
 
 CustomPackageInstall() {
   DefaultPreInstallStep
   DefaultDownloadStep
   DefaultExtractStep
   DefaultPatchStep
   CustomBuildStep
   if [ ${NACL_ARCH} = "pnacl" ] ; then
     # NOTE: nethack does not use a build subdir
     DefaultTranslateStep ${PACKAGE_NAME} src/nethack
   fi
   DefaultTouchStep
   DefaultCleanUpStep
 }
 
 CustomPackageInstall
 exit 0