File 0002-Add-ENABLE_PYPROTO_API-option-to-CMake-build-clean-u.patch of Package failed_pybind11_protobuf

From 23ca2be2902aa073aba0dfa80cb22030cf416732 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Stefan=20Br=C3=BCns?= <stefan.bruens@rwth-aachen.de>
Date: Sat, 15 Jun 2024 02:54:35 +0200
Subject: [PATCH 2/6] Add ENABLE_PYPROTO_API option to CMake build, clean up
 compilation

The PYBIND11_PROTOBUF_ENABLE_PYPROTO_API define was never set in
CMake builds, add a corresponding option.

As the check_unknown_fields code is only called dependent on the
define remove it from the build if not used.
---
 CMakeLists.txt | 34 ++++++++++++++++++++++++----------
 1 file changed, 24 insertions(+), 10 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 46388d1..b1a20f0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -17,6 +17,7 @@ set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 # Options
 
 option(BUILD_TESTS "Build tests." OFF)
+option(ENABLE_PYPROTO_API "Enable usage of proto_api." OFF)
 
 # ============================================================================
 # Find Python
@@ -68,10 +69,18 @@ add_library(
   # bazel: pybind_library: proto_cast_util
   pybind11_protobuf/proto_cast_util.cc
   pybind11_protobuf/proto_cast_util.h
-  pybind11_protobuf/proto_caster_impl.h
+  pybind11_protobuf/proto_caster_impl.h)
+
+target_sources(
   # bazel: cc_library::check_unknown_fields
-  pybind11_protobuf/check_unknown_fields.cc
-  pybind11_protobuf/check_unknown_fields.h)
+  pybind11_native_proto_caster #
+  PRIVATE pybind11_protobuf/check_unknown_fields.cc
+          pybind11_protobuf/check_unknown_fields.h)
+
+if(ENABLE_PYPROTO_API)
+  target_compile_definitions(pybind11_native_proto_caster
+                             PRIVATE PYBIND11_PROTOBUF_ENABLE_PYPROTO_API)
+endif()
 
 target_link_libraries(
   pybind11_native_proto_caster
@@ -98,10 +107,18 @@ add_library(
   # bazel: pybind_library: proto_cast_util
   pybind11_protobuf/proto_cast_util.cc
   pybind11_protobuf/proto_cast_util.h
-  pybind11_protobuf/proto_caster_impl.h
-  # bazel: cc_library: check_unknown_fields
-  pybind11_protobuf/check_unknown_fields.cc
-  pybind11_protobuf/check_unknown_fields.h)
+  pybind11_protobuf/proto_caster_impl.h)
+
+target_sources(
+  # bazel: cc_library::check_unknown_fields
+  pybind11_wrapped_proto_caster
+  PRIVATE pybind11_protobuf/check_unknown_fields.cc
+          pybind11_protobuf/check_unknown_fields.h)
+
+if(ENABLE_PYPROTO_API)
+  target_compile_definitions(pybind11_wrapped_proto_caster
+                             PRIVATE PYBIND11_PROTOBUF_ENABLE_PYPROTO_API)
+endif()
 
 target_link_libraries(
   pybind11_wrapped_proto_caster
@@ -119,9 +136,6 @@ target_include_directories(
   PRIVATE ${PROJECT_SOURCE_DIR} ${protobuf_INCLUDE_DIRS} ${protobuf_SOURCE_DIR}
           ${pybind11_INCLUDE_DIRS})
 
-# TODO set defines PYBIND11_PROTOBUF_ENABLE_PYPROTO_API see: bazel:
-# pybind_library: proto_cast_util
-
 # bazel equivs. checklist
 #
 # bazel: pybind_library: enum_type_caster - enum_type_caster.h
-- 
2.45.0