How to disable optimization when building AOSP?

[Xie Wu]

Hi, I found some optimized variables when debugging so, such as libart.so.

I tried "mma LOCAL_CFLAGS="-O0 -g"", but it does not work. (reference: How to make debug build of specific module under AOSP tree?)

How can I disable optimization?

Thanks.

[Colin Cross]

There is no generic way to disable optimization for a specific module.
For art-related modules you can use mma -j ART_DEBUG_OPT_FLAG=-O0, and
then use the version suffixed with "d", for example dex2oatd or
dalvikvm -XXlib:libartd.so

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[Xie Wu]

Thank you for your reply. if I want to build the whole AOSP without optimization, what should I do?

[Colin Cross]

You can try changing the default flags for the architecture you are
about, for example
https://android.git.corp.google.com/platform/build/soong/+/master/cc/config/arm64_device.go#49,
but it is likley to cause build problems in a few modules. For
example, ART sets strict stack frame size limits that will probably
fail with global -O0.

[Xie Wu]

The url you provided can not be accessed because it requires authentication, then I found a similar web site.

https://android.googlesource.com/platform/build/soong/+/master/cc/config/arm64_device.go#56

thank you for your reply.