customize macro when using ndk-build

Issue

To my understanding, I can customize a macro with LOCAL_CFLAGS += -DMY_DEFINITION in Android.mk, but Can I customize a macro when ndk-building projects? Such as:

$ ndk-build -DMy_DEFINITION 

Somewhat like cmake -DMY_DEFINITION .., which makes building configurations more flexible

Solution

Use:

ndk-build MY_DEFINITION=1

That will be visible from your Android.mk. Can see that it is set by using $(info):

$(info MY_DEFINITION=$(MY_DEFINITION))
# Rest of your Android.mk...

Answered By - Dan Albert