commit 19e0c40685b4088e553479231d3f93d29928452e
author Michael Spang <spang@google.com> Wed Aug 05 11:44:14 2020 -0400
committer GitHub <noreply@github.com> Wed Aug 05 11:44:14 2020 -0400
tree 07dce4f4b79fff1336893946c34128eff82c7099
parent 3a23f738ec092e0ef46e47ac8ca55d1ffc89518f

EFR32: Fix ARM arch setup when setting efr32_board in GN args (#1978)

* EFR32: Fix ARM arch setup when setting efr32_board in GN args

Currently examples/lock-app/efr32/args.gni tries to set the
ARM architecture flags based on a condition:

if (efr32_family == "efr32mg12") {
  arm_float_abi = "softfp"
  arm_fpu = "fpv4-sp-d16"
} else if (efr32_family == "efr32mg21") {
  arm_float_abi = "hard"
  arm_fpu = "fpv5-sp-d16"
}

This isn't working if the board is set via GN args, which is preferred
over the environment variable. The reason is that this file is providing
the default arguments, and it's not possible to use the user arguments
to set the defaults. We want explicit args to take precedence, and this
is necessary for toolchain specific arguments to work.

Fix this by adding a way for platforms to provide a config file that
sets up the default ARM architecture flags (and which can account for
other platform specific arguments in doing so, such as efr32_board).

* Fix building for nRF5 via gn_build.sh

* Share the build_overrides

* Add efr32_sdk.gni back to build_overrides