I'm following this tutorial to compile this fork of Tesseract (an optical character recognition package) for Android. I'm at the step where I use Cygwin to build the NDK for the Tesseract Android project. I'm getting the following error when invoking ndk-build (from the tess-two directory):
c:/android-ndk-r8b-windows/android-ndk-r8b/toolchains/arm-linux-androideabi-4.6/prebuilt/windows/bin/../lib/gcc/arm-linux-androideabi/4.6.x-google/../../../../arm-linux-androideabi/bin/ld.exe: cannot find ./obj/local/armeabi-v7a/libgnustl_static.a: Permission denied
What could be causing this error? On a side note, is there an easier way to get Tesseract up and running on Android?
Under Windows, run your command prompt as an administrator and try again:
Search->cmd.exe->Right-click->Run as Administrator
Cygwin is unnecessary--just use Windows itself. You can follow the README build instructions on the Tesseract fork. The blog you're following makes the process more complicated than necessary.
First check whether you are able to compile samples in the ndk. And 'make' sure cygwin is installed.. Compilation problem occurs from installation or packages not yet installed. Early I worked with tesseract and have not found any problem.
Thus Tesseract OCR is used to refer a library to your project.. As example, check this . Use test-two and it worked.
来源：https://stackoverflow.com/questions/12469711/building-tesseract-with-android-ndk