eng, user, userdebug 的不同

The difference between Android source code compiler options eng, user, userdebug

The difference between Android source code compiler options eng, user, userdebug

1, A brief description of each option

eng: Debug version

User:release version

UserDebug version: debug version

2, Details

Android source code compiler options eng, user, userdebug is a Android.mk file in the LOCAL_MODULE_TAGS configuration to decide. Following its general form:

LOCAL_MODULE_TAGS := user eng optional test

The details are as follows: 

1, user: Only when the user version of the module was compiled.,

2, eng: Only when the eng version of the module was compiled.,

3, test: Only when the tests version of the module was compiled.,

4, optional: In all versions are compiled into the module.

One of the value can be set to 1 or more, respectively corresponding compiler options with one or more.

eng, user, Userdebug the difference is as follows:

1, When make eng, which is equivalent to make. When the BuildType is eng, then the compiler in include:

·Intended for platform-level debugging

·Installs modules tagged with: eng, debug, user, and/or development

·Installs non-APK modules that have no tags specified

·Installs APKs according to the product definition files, in addition to taggedAPKs

·Sets ro.secure=1

·Sets ro.debuggable=0

·Sets ro.kernel.android.checkjni=1

·adbd is enabled by default

2, When make user, then BuildType is user, then the compiler in include:

·Intended to be the final release

·Installs modules tagged as user

·Installs non-APK modules that have no tags specified

·Installs APKs according to the product definition files (tags are ignored forAPK modules)

·Sets ro.secure=1

·Sets ro.debuggable=0

·adbd is disabled by default

3, When make userdebug, then BuildType is userdebug, then the compiler in include:

thesame as user, except:

·Intended for limited debugging

·Installs modules tagged with debug

·Sets ro.debuggable=1

·adbd is enabled by default

3, Distribute :

eng	This is the default flavor. A plain "make " is the same as "make eng ". droid is an alias foreng . · Installs modules tagged with: eng , debug , user , and/or development . · Installs non-APK modules that have no tags specified. · Installs APKs according to the product definition files, in addition to tagged APKs. · ro.secure=0 · ro.debuggable=1 · ro.kernel.android.checkjni=1 · adb is enabled by default.
user	"make user " This is the flavor intended to be the final release bits. · Installs modules tagged with user . · Installs non-APK modules that have no tags specified. · Installs APKs according to the product definition files; tags are ignored for APK modules. · ro.secure=1 · ro.debuggable=0 · adb is disabled by default.
userdebug	"make userdebug " The same as user , except: · Also installs modules tagged with debug . · ro.debuggable=1 · adb is enabled by default.