From 2a278e0756ee4c1a4590e90d363ff37ba10b9f44 Mon Sep 17 00:00:00 2001
From: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
Date: Thu, 18 Feb 2021 15:42:47 -0800
Subject: [PATCH] protoc-c: fix shared lib build on windows

Fixes #458

Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
---
 protoc-c/c_generator.h | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/protoc-c/c_generator.h b/protoc-c/c_generator.h
index 9d94bec..ac1ffaf 100644
--- a/protoc-c/c_generator.h
+++ b/protoc-c/c_generator.h
@@ -68,6 +68,12 @@
 #include <string>
 #include <google/protobuf/compiler/code_generator.h>
 
+#if defined(_WIN32) && defined(PROTOBUF_C_USE_SHARED_LIB)
+# define PROTOC_C_EXPORT __declspec(dllexport)
+#else
+# define PROTOC_C_EXPORT
+#endif
+
 namespace google {
 namespace protobuf {
 namespace compiler {
@@ -77,7 +83,7 @@ namespace c {
 // header.  If you create your own protocol compiler binary and you want
 // it to support C++ output, you can do so by registering an instance of this
 // CodeGenerator with the CommandLineInterface in your main() function.
-class LIBPROTOC_EXPORT CGenerator : public CodeGenerator {
+class PROTOC_C_EXPORT CGenerator : public CodeGenerator {
  public:
   CGenerator();
   ~CGenerator();