unset PROTOBUF variable

gangliao · Jun 22, 2018 · 586fe1b · 586fe1b
1 parent 62a356d
commit 586fe1b
Showing 1 changed file with 13 additions and 0 deletions.
diff --git a/cmake/external/protobuf.cmake b/cmake/external/protobuf.cmake
@@ -17,6 +17,19 @@ INCLUDE(ExternalProject)
 # Always invoke `FIND_PACKAGE(Protobuf)` for importing function protobuf_generate_cpp
 FIND_PACKAGE(Protobuf QUIET)
 
+macro(UNSET_VAR VAR_NAME)
+    UNSET(${VAR_NAME} CACHE)
+    UNSET(${VAR_NAME})
+endmacro()
+UNSET_VAR(PROTOBUF_INCLUDE_DIR)
+UNSET_VAR(PROTOBUF_FOUND)
+UNSET_VAR(PROTOBUF_PROTOC_EXECUTABLE)
+UNSET_VAR(PROTOBUF_PROTOC_LIBRARY)
+UNSET_VAR(PROTOBUF_LITE_LIBRARY)
+UNSET_VAR(PROTOBUF_LIBRARY)
+UNSET_VAR(PROTOBUF_INCLUDE_DIR)
+UNSET_VAR(Protobuf_PROTOC_EXECUTABLE)
+
 function(_protobuf_generate_cpp SRCS HDRS)
   if(NOT ARGN)
     message(SEND_ERROR "Error: _protobuf_generate_cpp() called without any proto files")