tree 147a15b6d2c6eb0e4788849c3b964dcd940c0a64
parent b59d2c968b458bedf130e63650ef38d044655fe8
author Wyatt Hepler <hepler@google.com> 1620758249 -0700
committer CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com> 1620948346 +0000

CMake: Check that backend targets are defined

Create a generator expression that fails to evaluate if a backend does
not exist. This avoids confusing compilation errors.

Change-Id: I5475fa53bf604b6cc445d9774b96fd8d5eb66f09
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/44564
Commit-Queue: Wyatt Hepler <hepler@google.com>
Reviewed-by: Vic Yang <victoryang@google.com>