如何单独编译Android模拟器中的android-emugl模块

Hey there! Let’s walk through exactly how to compile the android-emugl module on its own—no need to build the entire Android codebase. Here’s what you need to do:

Prerequisites #

First, make sure you’ve already set up your Android source code environment:

• You’ve run repo sync to pull the full emulator codebase
• You’re working from the root directory of your Android source tree

Step-by-Step Build Process #

1. Load the build environment scripts
   Open your terminal and run this command to initialize the Android build system:

   source build/envsetup.sh
   

   This sets up all the necessary environment variables and helper commands you’ll need for building.

2. Select your target device configuration (optional but recommended)
   Even though we’re building a single module, specifying a target ensures the build uses the right architecture and settings for the emulator. Run:

   lunch
   

   Then pick a target like sdk_phone_x86_64 (for 64-bit x86 emulators) or another emulator-compatible option from the list.

3. Compile the android-emugl module
   You have two easy ways to do this:

   • Option 1: Build from the module directory
     Navigate to the android-emugl directory first:

     cd hardware/google/emugl/
     

     Then run the mm command (which builds all modules in the current directory):

     mm
     

   • Option 2: Build directly from the source root
     If you don’t want to change directories, use the mmm command followed by the module’s path:

     mmm hardware/google/emugl/
     

What Happens Next? #

Once the build finishes successfully, you’ll find the compiled binaries and libraries in the out/target/product/<your-target>/obj/lib/ and out/target/product/<your-target>/system/lib/ directories (the exact location depends on the submodules within emugl).

Troubleshooting Tips #

• If you hit dependency errors, try running make clean in the emugl directory first, then re-run the build command.
• For first-time builds, it’s normal to wait a bit longer as the system pulls and compiles any missing dependencies.

内容的提问来源于stack exchange，提问作者Michel Roger