Reset internal variables before use (#2975)

This commit revises Protobuf_Generate to reset internal variables before
using them.

Signed-off-by: Jonghyun Park <jh1302.park@samsung.com>

diff --git a/cmake/packages/ProtobufConfig.cmake b/cmake/packages/ProtobufConfig.cmake
index ddd7c4d..ed38859 100644 (file)
--- a/cmake/packages/ProtobufConfig.cmake
+++ b/cmake/packages/ProtobufConfig.cmake
@@ -110,6 +110,11 @@ if(Protobuf_FOUND)
     get_filename_component(abs_output_dir ${OUTPUT_DIR} ABSOLUTE)
     get_filename_component(abs_proto_dir ${PROTO_DIR} ABSOLUTE)
 
+    # Let's reset variables before using them
+    # NOTE This DOES NOT AFFECT variables in the parent scope
+    unset(PROTO_FILES)
+    unset(OUTPUT_FILES)
+
     foreach(proto ${ARGN})
       get_filename_component(fil "${proto}" NAME)
       get_filename_component(dir "${proto}" DIRECTORY)