tree ee9f23a377f80ff8f764bfcf32ca54e581f6782d
parent 8f301d583fb41374c3a3b9041e5189e2640ab2ee
author Colin Cross <ccross@android.com> 1436475468 -0700
committer Colin Cross <ccross@android.com> 1440458408 -0700

Support product variables

Allow modules to vary their properties based on product variables.
For now, DEVICE_USES_LOGD, DEVICE_USES_JEMALLOC, and DEVICE_USES_DLMALLOC,
and BOARD_MALLOC_ALIGNMENT are supported.

Product variables can provide a value (only bool and int supported for
now), and if any of the product variable properties contains a "%d"
then Sprintf will be called with the property value as the format
and the product variable value convert to an int as the only argument.

For example:

    product_variables: {
        dlmalloc_alignment: {
            cflags: ["-DMALLOC_ALIGNMENT=%d"],
        },
    },

will cause -DMALLOC_ALIGNMENT=16 to be added to any top level
properties called "cflags".

Change-Id: I74882a6ab4914d3e222f8d06cfac371b7b829ae5