Adding a flag in Android.bp

[Minseong Kim]

Hi~

It is quite difficult to find information about handling Android.bp files.

Does anyone know how to add an additional Boolean flag to a module in a local Android.bp (e.g. bionic/libdl/Android.bp) and this newly added flag can be examined true/false when being parsed (e.g. at TransformSourceToObj function in build/soong/cc/builder.go where local flags from Android.bp files are parsed and constructed) ?

Your time and help is greatly appreciated in advance. 

cheers,

Min

[Colin Cross]

Can you describe more about the flag you are trying to add? It would
probably go in BaseCompilerProperties in build/soong/cc/compiler.go,
then be parsed in baseCompiler.compilerFlags into a something that is
passed to the compiler in TransformSourceToObj.

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[Minseong Kim]

Hi Colin,

Thanks for your time.

For example, I want to add a flag (local_flag) like the following in the bionic/libdl/Android.bp:

And when the module's flags are being parsed (for example in TransformSourceToObj function or other places where more appropriate), the local_flag can be examined in order to decide whether to add a additional flag or not as the following:

So that the "some compiler flag" can be appended to the cflags iff the module's local_flag is set to true.

Thank you very much for your help ^^

cheers,

Min