How to add a preprocessor definition in android globally -

i want add pre-processor definition in android project globally. in android, add modifications this:

#ifdef vendor_edit //zhiquan.huang@mmapp.camera, 2013/07/11 add hello module                                                                                                                 register_android_server_helloservice(env);  #endif/* vendor_edit */ 

i don't know add vendor_edit macro in android build system, can me?
thx

you need add declaration common_global_cflags , common_global_cppflags in build/core/config.mk add below line in config.mk or device specific make file.

common_global_cflags+=-dvendor_edit common_global_cppflags+=-dvendor_edit