Optimize Skia build for Android

[Md. Shamsul Arifin Mozumder]

Hi,

I have built skia for android and followed this tutorial:
https://sites.google.com/site/skiadocs/user-documentation/quick-start-guides/android

After building skia, my shared lib(libskia.so) file size has been around 50-60MB (for debug and release build).

Is there any way to optimize the build and make shared lib file size under 10MB?

Thanks,

Arifin

[Mike Klein]

If you're using our GYP files to build Skia, you're using build scripts mostly designed for development (even Release) where we don't pay much attention to library structure or size.  They're all built with -g, which bloats the file size considerably.

I can reproduce your issue:

$ platform_tools/android/bin/android_ninja -d arm_v7_neon -t Release skia_lib

...

$ ls -lh out/config/android-arm_v7_neon/Release/lib/libskia_android.so

-rwxr-xr-x  1 mtklein  staff    50M Aug 28 09:19 out/config/android-arm_v7_neon/Release/lib/libskia_android.so

Here's what I'd suggest to fix it:

$ env CPPFLAGS=-g0 platform_tools/android/bin/android_ninja -d arm_v7_neon -t Release skia_lib

...

$ ls -lh out/config/android-arm_v7_neon/Release/lib/libskia_android.so

-rwxr-xr-x  1 mtklein  staff   5.5M Aug 28 09:23 out/config/android-arm_v7_neon/Release/lib/libskia_android.so

There's still quite a lot in there you might not need, but that ought to get you within expected size.

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[Jim Van Verth]

Stripping out the debug symbols might also do what you need: strip --strip-unneeded libskia_android.so

[Mike Klein]

Yep, either way works.

[Mike Reed]

Lets try to capture this on our site or build-dox

[Heather Miller]

If someone hasn't yet, I will start a doc draft and share it for edits on our build output, options.

Heather