pw_rpc: Add the pw_rpc config to CMake

- Add the pw_rpc_CONFIG module configuration to the CMake build.
- Add pw_rpc.disable_global_mutex_config to simplify disabling the
  global pw_rpc mutex in CMake.

Change-Id: I0a776c4c8f5dde7c21b2eb0fd72070d1da268705
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/96202
Reviewed-by: Rob Mohr <mohrr@google.com>
Commit-Queue: Auto-Submit <auto-submit@pigweed.google.com.iam.gserviceaccount.com>
Pigweed-Auto-Submit: Wyatt Hepler <hepler@google.com>

pw_rpc/CMakeLists.txt

@@ -23,6 +23,17 @@ add_subdirectory(pwpb)
 add_subdirectory(raw)
 add_subdirectory(system_server)
 
+pw_add_module_config(pw_rpc_CONFIG)
+
+pw_add_module_library(pw_rpc.config
+  HEADERS
+    public/pw_rpc/internal/config.h
+  PUBLIC_INCLUDES
+    public
+  PUBLIC_DEPS
+    ${pw_rpc_CONFIG}
+)
+
 pw_add_module_library(pw_rpc.server
   SOURCES
     call.cc
@@ -85,10 +96,11 @@ pw_add_module_library(pw_rpc.common
     pw_bytes
     pw_containers
     pw_function
+    pw_rpc.config
+    pw_rpc.protos.pwpb
     pw_span
     pw_status
     pw_sync.lock_annotations
-    pw_rpc.protos.pwpb
   PRIVATE_DEPS
     pw_log
 )
@@ -129,6 +141,13 @@ pw_proto_library(pw_rpc.test_protos
     pw_rpc_test_protos/test.proto
 )
 
+# Set pw_rpc_CONFIG to this to disable the global mutex.
+add_library(pw_rpc.disable_global_mutex_config INTERFACE)
+target_compile_definitions(pw_rpc.disable_global_mutex_config
+  INTERFACE
+    PW_RPC_USE_GLOBAL_MUTEX=0
+)
+
 pw_auto_add_module_tests(pw_rpc
   PRIVATE_DEPS
     pw_rpc.client