From 4a1177246da0bee6cd48a122b9dcd12f105ab738 Mon Sep 17 00:00:00 2001
From: JiaRui Liu <SnowNF@outlook.com>
Date: Tue, 8 Oct 2024 08:33:35 +0800
Subject: FindProtobuf: Fail protobuf_generate early if protoc is missing

---
 Modules/FindProtobuf.cmake | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Modules/FindProtobuf.cmake b/Modules/FindProtobuf.cmake
index bdad4de..197e71f 100644
--- a/Modules/FindProtobuf.cmake
+++ b/Modules/FindProtobuf.cmake
@@ -292,6 +292,12 @@ function(protobuf_generate)
     return()
   endif()
 
+  if(NOT TARGET protobuf::protoc)
+    message(SEND_ERROR "protoc executable not found. "
+            "Please define the Protobuf_PROTOC_EXECUTABLE variable or ensure that protoc is in CMake's search path.")
+    return()
+  endif()
+
   if(protobuf_generate_APPEND_PATH)
     # Create an include path for each file specified
     foreach(_file ${protobuf_generate_PROTOS})
-- 
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