$ meaning in Android.mk

Question

This morning when I was going through Android.mk file. I was just wondering what does $ in the following means

For Example in android.mk

LOCAL_PATH := $(call my-dir)

include $(BUILD_SHARED_LIBRARY)

I just have this doubt when do we use the $ in writing the android make file. To call the script that is previously defined by the built system or To call macros or... When?

Thanks in advance

Answer 1

You can take this as a shell prompt, that you use to call macro function, get predefined variable value etc. e.g. LOCAL_PATH := $(call my-dir) is used to return the path of the current directory, the macro function 'my-dir', provided by the build system. More about android.mk