[bazel] Build mcp server for lldb (#178437)

utils/bazel/llvm-project-overlay/lldb/BUILD.bazel

@@ -138,6 +138,7 @@ expand_template(
 
         # Defaults that could be configurable if needed
         "#cmakedefine01 LLDB_ENABLE_POSIX": "#define LLDB_ENABLE_POSIX 1",
+        "#cmakedefine01 LLDB_ENABLE_PROTOCOL_SERVERS": "#define LLDB_ENABLE_PROTOCOL_SERVERS 1",
         "#cmakedefine LLDB_GLOBAL_INIT_DIRECTORY R\"(${LLDB_GLOBAL_INIT_DIRECTORY})\"": "#define LLDB_GLOBAL_INIT_DIRECTORY \"\"",
         "${LLDB_INSTALL_LIBDIR_BASENAME}": "lib",
         "${LLDB_BUG_REPORT_URL}": "",
@@ -757,6 +758,27 @@ cc_library(
     includes = ["include"],
 )
 
+cc_library(
+    name = "ProtocolHeaders",
+    hdrs = glob(["include/lldb/Protocol/**/*.h"]),
+    includes = ["include"],
+    deps = [
+        ":Headers",
+        "//llvm:Telemetry",
+    ],
+)
+
+cc_library(
+    name = "ProtocolMCP",
+    srcs = glob(["source/Protocol/MCP/*.cpp"]),
+    deps = [
+        ":Host",
+        ":ProtocolHeaders",
+        ":Utility",
+        "//llvm:Support",
+    ],
+)
+
 cc_library(
     name = "Utility",
     srcs = glob(["source/Utility/**/*.cpp"]),

utils/bazel/llvm-project-overlay/lldb/source/Plugins/BUILD.bazel

@@ -136,6 +136,22 @@ cc_library(
     ],
 )
 
+cc_library(
+    name = "PluginProtocolServerMCP",
+    srcs = glob(["Protocol/MCP/*.cpp"]),
+    hdrs = glob(["Protocol/MCP/*.h"]),
+    deps = [
+        "//lldb:CoreHeaders",
+        "//lldb:Headers",
+        "//lldb:Host",
+        "//lldb:InterpreterHeaders",
+        "//lldb:ProtocolHeaders",
+        "//lldb:ProtocolMCP",
+        "//lldb:Utility",
+        "//llvm:Support",
+    ],
+)
+
 cc_library(
     name = "PluginTypeSystemClang",
     srcs = glob(["TypeSystem/Clang/*.cpp"]),

utils/bazel/llvm-project-overlay/lldb/source/Plugins/plugin_config.bzl

@@ -71,6 +71,7 @@ DEFAULT_PLUGINS = [
     "ProcessElfCore",
     "ProcessMachCore",
     "ProcessMinidump",
+    "ProtocolServerMCP",
     "RegisterTypeBuilderClang",
     "ScriptedProcess",
     "StructuredDataDarwinLog",