From a69638409ca3816c9da8ae1166273eb7a8fe1b8d Mon Sep 17 00:00:00 2001
From: Tao He <sighingnow@gmail.com>
Date: Wed, 4 Aug 2021 11:27:56 +0800
Subject: [PATCH] The target protobuf::protoc exists since cmake 3.10.

Fixes for cmake version later than v3.10, e.g., cmake 3.9.

See also upstream patch:

    https://github.com/Kitware/CMake/commit/c281acf80768c56bbe12a9f017a856d8e966f084

Signed-off-by: Tao He <sighingnow@gmail.com>
---
 CMakeLists.txt | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c04d523..b47932b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -54,6 +54,15 @@ endif()
 
 find_package(OpenSSL REQUIRED)
 find_package(Protobuf REQUIRED)
+if(Protobuf_PROTOC_EXECUTABLE)
+    if(NOT TARGET protobuf::protoc)
+        add_executable(protobuf::protoc IMPORTED)
+        if(EXISTS "${Protobuf_PROTOC_EXECUTABLE}")
+            set_target_properties(protobuf::protoc PROPERTIES
+                IMPORTED_LOCATION "${Protobuf_PROTOC_EXECUTABLE}")
+        endif()
+    endif()
+endif()
 find_package(cpprestsdk QUIET)
 if(cpprestsdk_FOUND)
     set(CPPREST_INCLUDE_DIR)