From 71f9a0069c752d1fc29234f3803321a56a01cff1 Mon Sep 17 00:00:00 2001
From: Joseph Eng <s-engjo@bsd405.org>
Date: Wed, 27 Dec 2023 20:56:40 -0800
Subject: [PATCH] Try using EXPORT_MACRO

---
 wpimath/CMakeLists.txt | 27 +++++++++++++++++++--------
 1 file changed, 19 insertions(+), 8 deletions(-)

diff --git a/wpimath/CMakeLists.txt b/wpimath/CMakeLists.txt
index 449f79d7cca..4d5735108d1 100644
--- a/wpimath/CMakeLists.txt
+++ b/wpimath/CMakeLists.txt
@@ -10,14 +10,25 @@ file(GLOB wpimath_proto_src src/main/proto/*.proto)
 set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS TRUE)
 add_library(wpimathproto ${wpimath_proto_src})
 
-protobuf_generate(
-    TARGET
-    wpimathproto
-    # EXPORT_MACRO?
-    PROTOC_OUT_DIR
-    "${CMAKE_CURRENT_BINARY_DIR}/protobuf"
-    APPEND_PATH
-)
+if(MSVC)
+    protobuf_generate(
+        TARGET
+        wpimathproto
+        EXPORT_MACRO
+        "__declspec(dllexport)"
+        PROTOC_OUT_DIR
+        "${CMAKE_CURRENT_BINARY_DIR}/protobuf"
+        APPEND_PATH
+    )
+else()
+    protobuf_generate(
+        TARGET
+        wpimathproto
+        PROTOC_OUT_DIR
+        "${CMAKE_CURRENT_BINARY_DIR}/protobuf"
+        APPEND_PATH
+    )
+endif()
 
 target_compile_features(wpimathproto PUBLIC cxx_std_14)