Changes in cmake files :

Disable error on parentheses warning
Add include dir jsoncpp to libstratum

cmake/EthCompilerSettings.cmake

@@ -3,7 +3,7 @@
 # C++11 check and activation
 if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU")
 
-	set(CMAKE_CXX_FLAGS "-std=c++11 -Wall -Wno-unknown-pragmas -Wextra -Werror -pedantic -DSHAREDLIB -fPIC ${CMAKE_CXX_FLAGS}")
+	set(CMAKE_CXX_FLAGS "-std=c++11 -Wall -Wno-unknown-pragmas -Wextra -Wno-error=parentheses -pedantic -DSHAREDLIB -fPIC ${CMAKE_CXX_FLAGS}")
 	set(CMAKE_CXX_FLAGS_DEBUG          "-O0 -g -DETH_DEBUG")
 	set(CMAKE_CXX_FLAGS_MINSIZEREL     "-Os -DNDEBUG -DETH_RELEASE")
 	set(CMAKE_CXX_FLAGS_RELEASE        "-O3 -DNDEBUG -DETH_RELEASE")

libstratum/CMakeLists.txt

@@ -4,6 +4,7 @@ aux_source_directory(. SRC_LIST)
 
 include_directories(..)
 include_directories(${Boost_INCLUDE_DIRS})
+include_directories(${JSONCPP_INCLUDE_DIRS})
 
 file(GLOB HEADERS "*.h")