"Set LOCAL_MODULE_TAGS to any number of whitespace-separated tags.
This variable controls what build flavors the package gets included
in. For example:
* user: include this in user/userdebug builds
* eng: include this in eng builds
* tests: the target is a testing target and makes it available for
tests
* optional: don't include this"
Are these the same as "variants" and if so, which name would affect
the build and how? I've noticed that everything mentioned in a
product's makefile will always get built. But what gets in the final
system.img not always the same as what gets built.
------解决方案--------------------
就是mk的标记啊，
直接给你上官方的吧
http://android.git.kernel.org/?p=platform/build.git;a=blob_plain;f=core/build-system.html;h=43bae03b6b7b9cba678b86d2faf424fa565497bf;hb=HEAD
------解决方案--------------------
user: 指该模块只在user版本下才编译
eng: 指该模块只在eng版本下才编译
tests: 指该模块只在tests版本下才编译
optional:指该模块在所有版本下都编译