Ubuntu环境下Android NDK编译报错求助：模块缺失与文件依赖问题

Hey Andy, let's tackle these two issues one by one—they're both basic setup snags that are easy to fix!

1. Error: ndk-build cannot find module with tag 'cxx-stl/system' in import path #

First off, the system STL is the default runtime for NDK builds, so you don't need to explicitly import it with an import-module call. That line in your Android.mk is unnecessary and causing the error.

Here's what to do:

• Open your jni/Android.mk file.
• Delete any line that looks like $(call import-module,cxx-stl/system).
• If you want to explicitly confirm you're using the system STL, add LOCAL_STL := system to your module definition (this is optional, since it's the default behavior).

Also, a quick heads-up: this error might also pop up if you're working directly with the compressed NDK archive instead of an extracted directory—we'll fix that in the next section.

2. Error: make: *** No rule to make target '/hello.c', needed by 'obj/local/armeabi/objs/helloARM/hello.o'. Stop. #

Looking at your command path, you're trying to run ndk-build directly on the .tar.bz2 compressed file like it's a folder—that's the core issue here! The NDK needs to be extracted to a regular directory first, otherwise the build system can't find the example source files.

Follow these steps to fix this:

1. Extract the NDK archive:
   Run this terminal command to unpack the NDK (adjust the path if your download is in a different location):

   tar -xvf ~/Downloads/android-ndk-r11-linux-x86_64.tar.bz2 -C ~/Downloads/
   

   This will create a directory named android-ndk-r11 in your Downloads folder.

2. Verify the example files exist:
   Navigate to the hello example's jni directory:

   cd ~/Downloads/android-ndk-r11/sources/hello/jni
   

   Run ls to check for hello.c—you should see it alongside Android.mk.

3. Run ndk-build correctly:
   From the jni directory, just run:

   ndk-build
   

   If you're running it from another location, use the -C flag to point to the hello example's root folder:

   ndk-build -C ~/Downloads/android-ndk-r11/sources/hello
   

Quick Final Check #

To make running ndk-build easier long-term, you can add the NDK's root directory to your system PATH, or always call it using the full path:

~/Downloads/android-ndk-r11/ndk-build

内容的提问来源于stack exchange，提问作者Andy Lee