try the fallback

recipe/patches/0004-ensure-we-correctly-link-to-protobuf.patch

@@ -1,23 +1,24 @@
-From bd1260daa9344b35cf719db3ca412198a57171cf Mon Sep 17 00:00:00 2001
+From 94174b0cc5e4f7f5cec3797a76e61266e7a05e62 Mon Sep 17 00:00:00 2001
 From: "H. Vetinari" <h.vetinari@gmx.com>
 Date: Sat, 27 May 2023 10:34:28 +1100
 Subject: [PATCH 4/4] ensure we correctly link to protobuf
 
 ---
- cmake/opentelemetry-proto.cmake | 3 ++-
- 1 file changed, 2 insertions(+), 1 deletion(-)
+ cmake/opentelemetry-proto.cmake | 4 +---
+ 1 file changed, 1 insertion(+), 3 deletions(-)
 
 diff --git a/cmake/opentelemetry-proto.cmake b/cmake/opentelemetry-proto.cmake
-index e869cb11..50a8101a 100644
+index e869cb11..a867a2c9 100644
 --- a/cmake/opentelemetry-proto.cmake
 +++ b/cmake/opentelemetry-proto.cmake
-@@ -291,7 +291,8 @@ if(OPENTELEMETRY_INSTALL)
+@@ -291,9 +291,7 @@ if(OPENTELEMETRY_INSTALL)
      PATTERN "*.h")
  endif()
 
 -if(TARGET protobuf::libprotobuf)
-+find_package(Protobuf REQUIRED)
+-  target_link_libraries(opentelemetry_proto PUBLIC protobuf::libprotobuf)
+-else() # cmake 3.8 or lower
 +if(TRUE)
-   target_link_libraries(opentelemetry_proto PUBLIC protobuf::libprotobuf)
- else() # cmake 3.8 or lower
    target_include_directories(opentelemetry_proto
+                              PUBLIC ${Protobuf_INCLUDE_DIRS})
+   target_link_libraries(opentelemetry_proto PUBLIC ${Protobuf_LIBRARIES})