Use protobuf_generate instead of protobuf_generate_cpp

wpimath/CMakeLists.txt

@@ -8,19 +8,27 @@ include(DownloadAndCheck)
 # workaround for makefiles - for some reason parent directories aren't created.
 file(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/protobuf")
 file(GLOB wpimath_proto_src src/main/proto/*.proto)
-protobuf_generate_cpp(
-    WPIMATH_PROTO_SRCS
-    WPIMATH_PROTO_HDRS
-    # PROTOC_OUT_DIR
-    # "${CMAKE_CURRENT_BINARY_DIR}/protobuf"
-    # PROTOS
-    ${wpimath_proto_src}
+
+set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS TRUE)
+add_library(wpimathproto ${wpimath_proto_src})
+
+protobuf_generate(
+    TARGET
+    wpimathproto
+    LANGUAGE # This is the default, but have to make sure
+    cpp
+    OUR_VAR
+    test_proto_output
+    # EXPORT_MACRO?
+    PROTOC_OUT_DIR
+    "${CMAKE_CURRENT_BINARY_DIR}/protobuf"
+    IMPORT_DIRS
+    "src/main/proto"
 )
 
-message("WPIMATH_PROTO_SRCS: ${WPIMATH_PROTO_SRCS}")
-message("WPIMATH_PROTO_HDRS: ${WPIMATH_PROTO_HDRS}")
-# file(GLOB_RECURSE protoc_output RELATIVE "${CMAKE_CURRENT_BINARY_DIR}/protobuf" "${CMAKE_CURRENT_BINARY_DIR}/protobuf/*")
-# message("Output dir contents: ${protoc_output}")
+message("test_proto_output: ${test_proto_output}")
+file(GLOB_RECURSE protoc_output RELATIVE "${CMAKE_CURRENT_BINARY_DIR}/protobuf" "${CMAKE_CURRENT_BINARY_DIR}/protobuf/*")
+message("Output dir contents: ${protoc_output}")
 
 function(quickbuf_generate SRCS JAVA_PACKAGE)
     if(NOT ARGN)
@@ -207,8 +215,6 @@ endif()
 file(GLOB_RECURSE wpimath_native_src src/main/native/cpp/*.cpp)
 list(REMOVE_ITEM wpimath_native_src ${wpimath_jni_src})
 
-set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS TRUE)
-add_library(wpimathproto ${WPIMATH_PROTO_SRCS} ${WPIMATH_PROTO_HDRS})
 set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS FALSE)
 add_library(wpimath ${wpimath_native_src})
 set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS TRUE)
@@ -241,13 +247,13 @@ else()
     target_link_libraries(wpimath Eigen3::Eigen)
 endif()
 
-install(DIRECTORY WPIMATH_PROTO_HDRS DESTINATION "${include_dest}/wpimath")
-target_include_directories(
-    wpimathproto
-    PUBLIC
-        # $<BUILD_INTERFACE:${WPIMATH_PROTO_HDRS}>
-        $<INSTALL_INTERFACE:${include_dest}/wpimath>
-)
+# install(DIRECTORY WPIMATH_PROTO_HDRS DESTINATION "${include_dest}/wpimath")
+# target_include_directories(
+#     wpimathproto
+#     PUBLIC
+#         # $<BUILD_INTERFACE:${WPIMATH_PROTO_HDRS}>
+#         $<INSTALL_INTERFACE:${include_dest}/wpimath>
+# )
 
 install(DIRECTORY src/main/native/thirdparty/gcem/include/ DESTINATION "${include_dest}/wpimath")
 target_include_directories(