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| author | Armando Montanez <amontanez@google.com> | 2023-11-01 00:16:44 +0000 |
|---|---|---|
| committer | CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com> | 2023-11-01 00:16:44 +0000 |
| commit | 050c2211536b89e0ec9e419cef91c7bc60b339ab (patch) | |
| tree | 73080cab9de6cf1698fd8e5cc77c7f3061ea7806 /pw_build | |
| parent | cde4af63efd7b35087dc2dc7b0ebadab26d04e27 (diff) | |
| download | pigweed-050c2211536b89e0ec9e419cef91c7bc60b339ab.tar.gz | |
pw_build: Add empty_cc_library
Adds an analog to GN's $dir_pw_build:empty target to the Bazel build.
Change-Id: I31f5994f597e57cc2f03b7fd01ba949d532f2e95
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/178555
Presubmit-Verified: CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>
Pigweed-Auto-Submit: Armando Montanez <amontanez@google.com>
Reviewed-by: Ted Pudlik <tpudlik@google.com>
Commit-Queue: Auto-Submit <auto-submit@pigweed-service-accounts.iam.gserviceaccount.com>
Diffstat (limited to 'pw_build')
| -rw-r--r-- | pw_build/BUILD.bazel | 14 | ||||
| -rw-r--r-- | pw_build/bazel.rst | 15 |
2 files changed, 26 insertions, 3 deletions
diff --git a/pw_build/BUILD.bazel b/pw_build/BUILD.bazel index cc7d1a145..6ee0e3890 100644 --- a/pw_build/BUILD.bazel +++ b/pw_build/BUILD.bazel @@ -72,9 +72,17 @@ pw_cc_test( ], ) -# Special target that may be used instead of a cc_library as the default -# condition in backend multiplexer select statements. This produces better -# error messages than e.g. using an invalid label. +# This empty library is used as a placeholder for label flags that need to +# point to a library of some kind, but don't actually need the dependency to +# amount to anything. +cc_library( + name = "empty_cc_library", +) + +# A special target used instead of a cc_library as the default condition in +# backend multiplexer select statements to signal that a facade is in an +# unconfigured state. This produces better error messages than e.g. using an +# invalid label. # # If you're a user whose build errored out because a library transitively # depended on this target: the platform you're targeting did not specify which diff --git a/pw_build/bazel.rst b/pw_build/bazel.rst index ec3ac9818..abec75ff2 100644 --- a/pw_build/bazel.rst +++ b/pw_build/bazel.rst @@ -330,6 +330,21 @@ Example } // namespace my::stuff +Miscellaneous utilities +----------------------- +empty_cc_library +^^^^^^^^^^^^^^^^ +This empty library is used as a placeholder for label flags that need to point +to a library of some kind, but don't actually need the dependency to amount to +anything. + +unspecified_backend +^^^^^^^^^^^^^^^^^^^ +A special target used instead of a cc_library as the default condition in +backend multiplexer select statements to signal that a facade is in an +unconfigured state. This produces better error messages than e.g. using an +invalid label. + Toolchains and platforms ------------------------ Pigweed provides clang-based host toolchains for Linux and Mac Arm gcc |