Created by: yeyupiaoling

在执行sh build.sh android命令时报错，错误信息如下：

test@test:~/android_linux/paddle-mobile/tools$ sh build.sh android
CMake Error at CMakeLists.txt:2 (project):
  The CMAKE_C_COMPILER:

    /home/test/android_linux/android-ndk-r17b/toolchains/llvm/prebuilt/linux-x86_64/bin/clang

  is not a full path to an existing compiler tool.

  Tell CMake where to find the compiler by setting either the environment
  variable "CC" or the CMake cache entry CMAKE_C_COMPILER to the full path to
  the compiler, or to the compiler name if it is in the PATH.


CMake Error at CMakeLists.txt:2 (project):
  The CMAKE_CXX_COMPILER:

    /home/test/android_linux/android-ndk-r17b/toolchains/llvm/prebuilt/linux-x86_64/bin/clang++

  is not a full path to an existing compiler tool.

  Tell CMake where to find the compiler by setting either the environment
  variable "CXX" or the CMake cache entry CMAKE_CXX_COMPILER to the full path
  to the compiler, or to the compiler name if it is in the PATH.


-- Configuring incomplete, errors occurred!
See also "/home/test/android_linux/paddle-mobile/build/release/arm-v7a/CMakeFiles/CMakeOutput.log".