--- CMakeLists.txt.orig	2024-08-09 17:15:35 UTC
+++ CMakeLists.txt
@@ -39,9 +39,9 @@ if(USE_SYSTEM_PROTOBUF)
   set(_absl_package_args 20230125)
 endif()
 if(USE_SYSTEM_PROTOBUF)
-  set(_protobuf_package_args 4.23.3 REQUIRED)
+  set(_protobuf_package_args REQUIRED)
 else()
-  set(_protobuf_package_args 4.23.3)
+  set(_protobuf_package_args)
 endif()
 if(USE_SYSTEM_PYBIND)
   set(_pybind11_package_args 2.11.1 REQUIRED)
@@ -52,32 +52,11 @@ set(ABSL_ENABLE_INSTALL ON)
 set(ABSL_PROPAGATE_CXX_STD ON)
 set(ABSL_ENABLE_INSTALL ON)
 
-include(FetchContent)
-FetchContent_Declare(
-  absl
-  GIT_REPOSITORY "https://github.com/abseil/abseil-cpp.git"
-  GIT_TAG 20230125.3
-  FIND_PACKAGE_ARGS ${_absl_package_args} NAMES absl)
-
-# cmake-format: off
-FetchContent_Declare(
-  Protobuf
-  GIT_REPOSITORY "https://github.com/protocolbuffers/protobuf.git"
-  GIT_TAG v23.3
-  GIT_SUBMODULES ""
-  FIND_PACKAGE_ARGS ${_protobuf_package_args} NAMES protobuf)
-set(protobuf_BUILD_TESTS OFF CACHE INTERNAL "")
-# cmake-format: on
-
-FetchContent_Declare(
-  pybind11
-  GIT_REPOSITORY "https://github.com/pybind/pybind11.git"
-  GIT_TAG v2.11.1
-  FIND_PACKAGE_ARGS ${_pybind11_package_args} NAMES pybind11)
-
 message(CHECK_START "Checking for external dependencies")
+find_package(absl ${_absl_package_args})
+find_package(protobuf ${_protobuf_package_args})
+find_package(pybind11 ${_pybind11_package_args})
 list(APPEND CMAKE_MESSAGE_INDENT "  ")
-FetchContent_MakeAvailable(absl Protobuf pybind11)
 list(POP_BACK CMAKE_MESSAGE_INDENT)
 
 # ============================================================================
@@ -97,7 +76,7 @@ add_library(
 # ============================================================================
 # pybind11_native_proto_caster shared library
 add_library(
-  pybind11_native_proto_caster STATIC
+  pybind11_native_proto_caster SHARED
   # bazel: pybind_library: native_proto_caster
   pybind11_protobuf/native_proto_caster.h
   # bazel: pybind_library: enum_type_caster
@@ -106,6 +85,16 @@ add_library(
   pybind11_protobuf/proto_cast_util.cc
   pybind11_protobuf/proto_cast_util.h
   pybind11_protobuf/proto_caster_impl.h)
+add_library(
+  pybind11_native_proto_caster_static STATIC
+  # bazel: pybind_library: native_proto_caster
+  pybind11_protobuf/native_proto_caster.h
+  # bazel: pybind_library: enum_type_caster
+  pybind11_protobuf/enum_type_caster.h
+  # bazel: pybind_library: proto_cast_util
+  pybind11_protobuf/proto_cast_util.cc
+  pybind11_protobuf/proto_cast_util.h
+  pybind11_protobuf/proto_caster_impl.h)
 
 target_link_libraries(
   pybind11_native_proto_caster
@@ -117,22 +106,45 @@ target_link_libraries(
   protobuf::libprotobuf
   pybind11::pybind11
   ${Python_LIBRARIES})
+target_link_libraries(
+  pybind11_native_proto_caster_static
+  absl::flat_hash_map
+  absl::flat_hash_set
+  absl::hash
+  absl::strings
+  absl::optional
+  protobuf::libprotobuf
+  pybind11::pybind11
+  ${Python_LIBRARIES})
 
 target_include_directories(
   pybind11_native_proto_caster
   PRIVATE ${PROJECT_SOURCE_DIR} ${protobuf_INCLUDE_DIRS} ${protobuf_SOURCE_DIR}
           ${pybind11_INCLUDE_DIRS})
+target_include_directories(
+  pybind11_native_proto_caster_static
+  PRIVATE ${PROJECT_SOURCE_DIR} ${protobuf_INCLUDE_DIRS} ${protobuf_SOURCE_DIR}
+          ${pybind11_INCLUDE_DIRS})
+set_target_properties(pybind11_native_proto_caster_static PROPERTIES OUTPUT_NAME pybind11_native_proto_caster)
 
 # ============================================================================
 # pybind11_wrapped_proto_caster shared library
 add_library(
-  pybind11_wrapped_proto_caster STATIC
+  pybind11_wrapped_proto_caster SHARED
   # bazel: pybind_library: wrapped_proto_caster
   pybind11_protobuf/wrapped_proto_caster.h
   # bazel: pybind_library: proto_cast_util
   pybind11_protobuf/proto_cast_util.cc
   pybind11_protobuf/proto_cast_util.h
   pybind11_protobuf/proto_caster_impl.h)
+add_library(
+  pybind11_wrapped_proto_caster_static STATIC
+  # bazel: pybind_library: wrapped_proto_caster
+  pybind11_protobuf/wrapped_proto_caster.h
+  # bazel: pybind_library: proto_cast_util
+  pybind11_protobuf/proto_cast_util.cc
+  pybind11_protobuf/proto_cast_util.h
+  pybind11_protobuf/proto_caster_impl.h)
 
 target_link_libraries(
   pybind11_wrapped_proto_caster
@@ -144,11 +156,26 @@ target_link_libraries(
   protobuf::libprotobuf
   pybind11::pybind11
   ${Python_LIBRARIES})
+target_link_libraries(
+  pybind11_wrapped_proto_caster_static
+  absl::flat_hash_map
+  absl::flat_hash_set
+  absl::hash
+  absl::strings
+  absl::optional
+  protobuf::libprotobuf
+  pybind11::pybind11
+  ${Python_LIBRARIES})
 
 target_include_directories(
   pybind11_wrapped_proto_caster
   PRIVATE ${PROJECT_SOURCE_DIR} ${protobuf_INCLUDE_DIRS} ${protobuf_SOURCE_DIR}
           ${pybind11_INCLUDE_DIRS})
+target_include_directories(
+  pybind11_wrapped_proto_caster_static
+  PRIVATE ${PROJECT_SOURCE_DIR} ${protobuf_INCLUDE_DIRS} ${protobuf_SOURCE_DIR}
+          ${pybind11_INCLUDE_DIRS})
+set_target_properties(pybind11_wrapped_proto_caster_static PROPERTIES OUTPUT_NAME pybind11_wrapped_proto_caster)
 
 if(BUILD_TESTING)
   add_subdirectory(pybind11_protobuf/tests)
@@ -171,3 +198,18 @@ endif()
 #
 # proto_cast_util
 #
+
+install(
+  TARGETS pybind11_native_proto_caster pybind11_native_proto_caster_static pybind11_wrapped_proto_caster pybind11_wrapped_proto_caster_static
+  EXPORT pybind11_protobufTargets
+  LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+  ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+  RUNTIME DESTINATION ${CMAKE_INSTALL_LIBDIR}
+)
+install(
+  TARGETS pybind11_proto_utils
+  EXPORT pybind11_protobufTargets
+  LIBRARY DESTINATION ${CMAKE_INSTALL_PYDIR}
+  ARCHIVE DESTINATION ${CMAKE_INSTALL_PYDIR}
+  RUNTIME DESTINATION ${CMAKE_INSTALL_PYDIR}
+)