From 8c5557af6ff55b0dd806aa5205be7a11e92db990 Mon Sep 17 00:00:00 2001
From: dimitri staessens <dimitri.staessens@ugent.be>
Date: Wed, 13 Sep 2017 18:07:24 +0200
Subject: build: Clean up output with missing ProtobufC

---
 CMakeLists.txt | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 642c391c..624950bc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -85,7 +85,12 @@ endif ()
 enable_testing()
 add_custom_target(check COMMAND ${CMAKE_CTEST_COMMAND})
 
-find_package(ProtobufC REQUIRED QUIET)
+find_package(ProtobufC QUIET)
+if (NOT (PROTOBUF_C_INCLUDE_DIRS AND PROTOBUF_C_LIBRARY
+         AND PROTOBUF_PROTOC_C_EXECUTABLE))
+  message(FATAL_ERROR "Protobuf C compiler required but not found. "
+                      "Please install Google Protocol Buffers.")
+endif ()
 include_directories(${PROTOBUF_C_INCLUDE_DIRS})
 
 add_subdirectory(include)
-- 
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