From bfbe3450ecce0c82066ef11e7e442d5093f85331 Mon Sep 17 00:00:00 2001
From: owent <admin@owent.net>
Date: Wed, 17 May 2023 15:25:10 +0800
Subject: [PATCH] Include gRPC's include directories for
 `opentelemetry_proto_grpc`.

Signed-off-by: owent <admin@owent.net>
---
 cmake/opentelemetry-proto.cmake | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/cmake/opentelemetry-proto.cmake b/cmake/opentelemetry-proto.cmake
index 1e5abec516..34b33d3cff 100644
--- a/cmake/opentelemetry-proto.cmake
+++ b/cmake/opentelemetry-proto.cmake
@@ -263,6 +263,13 @@ if(WITH_OTLP_GRPC)
   set_target_properties(opentelemetry_proto_grpc PROPERTIES EXPORT_NAME
                                                             proto_grpc)
   patch_protobuf_targets(opentelemetry_proto_grpc)
+  get_target_property(GRPC_INCLUDE_DIRECTORY gRPC::grpc++
+                      INTERFACE_INCLUDE_DIRECTORIES)
+  if(GRPC_INCLUDE_DIRECTORY)
+    target_include_directories(
+      opentelemetry_proto_grpc
+      PUBLIC "$<BUILD_INTERFACE:${GRPC_INCLUDE_DIRECTORY}>")
+  endif()
 endif()
 
 if(needs_proto_download)