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#!/bin/bash
#
# Copyright (C) 2012 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

# This script is useful for learning the path of the active toolchain
# components within the ndk.
# Run this script without parameters, for usage hints.

# show usage if no parameter given
WHICH=$1
if [ "$WHICH" == "" ]; then
  echo "USAGE: ndk-which <tool>"
  echo "where tool is 'gdb', 'gcc', 'objdump', etc."
  exit 1
fi

MYNDKDIR=`dirname $0`

# create a temporary skeleton project so that we can leverage build-local.mk
mkdir -p /tmp/ndk-which/jni
cat >/tmp/ndk-which/jni/Android.mk << "END_OF_FILE"
include $(CLEAR_VARS)
END_OF_FILE

# 'get_build_var_for_abi' was copied from ndk-gdb
get_build_var_for_abi ()
{
    if [ -z "$GNUMAKE" ] ; then
        GNUMAKE=make
    fi
    NDK_PROJECT_PATH=/tmp/ndk-which $GNUMAKE --no-print-dir -f $MYNDKDIR/build/core/build-local.mk DUMP_$1 APP_ABI=$2
}

TOOLCHAIN_PREFIX=`get_build_var_for_abi TOOLCHAIN_PREFIX armeabi`
rm -Rf /tmp/ndk-which

# fully qualified file name
FQFN=${TOOLCHAIN_PREFIX}$WHICH

# use the host system's 'which' to decide/report if the file exists or not, and is executable
which "$FQFN"