Bazel Platforms: Add `//cpu:any` constraint value for arch-indep builds (#75)
* Bazel Platforms: Add `//cpu:any` constraint value for arch-indep builds
Some builds are expected to only produce architecture-independent data files,
such as configuration files, database seed data, composited images, or even
some kinds of interpreted scripts (Shell, Python, Perl, etc).
When such a build is being performed, this constraint value may be used to
ensure that architecture-dependent builds cannot be performed (except by way
of another transition).
As a final example, consider building a package of NIC firmware images for
many different NIC models. The package overall is architecture-independent,
and should be built with `//cpu:any`, then each individual image rule has a
transition to the suitable architecture for that specific NIC model.
* Update BUILD
Changed "any" to "all"
* Update BUILD
Fix comment
---------
Co-authored-by: aiuto <aiuto@google.com>
diff --git a/cpu/BUILD b/cpu/BUILD
index 729d711..9670e0c 100644
--- a/cpu/BUILD
+++ b/cpu/BUILD
@@ -30,6 +30,25 @@
# Many of the name here are legacy values and probably violate these conditions.
# We'll try to clean those up over time.
+# Special case: Architecture-independent outputs only
+#
+# Some builds are expected to only produce architecture-independent data files,
+# such as configuration files, database seed data, composited images, or even
+# some kinds of interpreted scripts (Shell, Python, Perl, etc).
+#
+# When such a build is being performed, this constraint value may be used to
+# ensure that architecture-dependent builds cannot be performed (except by way
+# of another transition).
+#
+# As a final example, consider building a package of NIC firmware images for
+# many different NIC models. The package overall is architecture-independent,
+# and should be built with `//cpu:all`, then each individual image rule has a
+# transition to the suitable architecture for that specific NIC model.
+constraint_value(
+ name = "all",
+ constraint_setting = ":cpu",
+)
+
constraint_value(
name = "aarch32",
constraint_setting = ":cpu",
