fix: bazel build with customlabels

* BUILD.bazel
* MODULE.bazel

Author: elsa

BUILD.bazel

@@ -1,3 +1,8 @@
+config_setting(
+    name              = "is_linux",
+    constraint_values = ["@platforms//os:linux"],
+)
+
 cc_library(
     name = "dd_trace_cpp",
     srcs = [
@@ -67,6 +72,7 @@ cc_library(
       "src/datadog/limiter.h",
       "src/datadog/msgpack.h",
       "src/datadog/null_logger.h",
+      "src/datadog/otel_identifiers.h",
       "src/datadog/parse_util.h",
       "src/datadog/platform_util.h",
       "src/datadog/random.h",
@@ -134,5 +140,8 @@ cc_library(
     deps = [
         "@com_google_absl//absl/strings",
         "@com_google_absl//absl/types:optional",
-    ],
+    ] + select({
+        ":is_linux": ["@customlabels//:customlabels"],
+        "//conditions:default": [],
+    }),
 )

MODULE.bazel

@@ -11,10 +11,24 @@ bazel_dep(
     name = "rules_cc",
     version = "0.0.9",
 )
+bazel_dep(
+    name = "customlabels",
+    version = "1.0.0",
+)
+bazel_dep(
+    name = "platforms",
+    version = "0.0.11",
+)
 # -- bazel_dep definitions -- #
 
 non_module_dependencies = use_extension("//:extensions.bzl", "non_module_dependencies")
 use_repo(
     non_module_dependencies,
     "com_google_absl",
 )
+
+git_override(
+    module_name = "customlabels",
+    remote = "https://github.com/DataDog/custom-labels.git",
+    commit = "1bc74232c0e414f2c63139f7cf7ac0bdce57d258",
+)