add local zmqpp build support via submodule

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "lib/zmqpp"]
+ path = lib/zmqpp
+ url = [email protected]:zeromq/zmqpp.git

CMakeLists.txt

@@ -287,8 +287,6 @@ endif()
 # Library pack
 find_package(GMP REQUIRED)
 find_package(Json REQUIRED)
-find_package(Zmq REQUIRED)
-find_package(Zmqpp REQUIRED)
 find_package(Lua REQUIRED)
 find_package(Zmq REQUIRED)
 find_package(Zmqpp REQUIRED)

cmake/Modules/FindZmqpp.cmake

@@ -1,10 +1,36 @@
+option(ENABLE_SYSTEM_ZMQPP "Use ZMQPP from system" TRUE)
 mark_as_advanced(ZMQPP_LIBRARY ZMQPP_INCLUDE_DIR)
+set(USE_SYSTEM_ZMQPP FALSE)
 
-find_path(ZMQPP_INCLUDE_DIR NAMES zmqpp.hpp PATH_SUFFIXES zmqpp)
-message(${ZMQPP_INCLUDE_DIR})
 
-find_library(ZMQPP_LIBRARY NAMES zmqpp)
-message(${ZMQPP_LIBRARY})
+if(ENABLE_SYSTEM_ZMQPP)
+ find_library(ZMQPP_LIBRARY NAMES zmqpp)
+ find_path(ZMQPP_INCLUDE_DIR NAMES zmqpp.hpp PATH_SUFFIXES zmqpp)
+
+ if(ZMQPP_LIBRARY AND ZMQPP_INCLUDE_DIR)
+ message (STATUS "Using GMP provided by system.")
+ set(USE_SYSTEM_GMP TRUE)
+ else()
+ message (STATUS "Detecting GMP from system failed.")
+ endif()
 
+endif()
+
+if(NOT USE_SYSTEM_GMP)
+ message(STATUS "Using zmqpp submodule")
+ find_path(ZMQPP_INCLUDE_DIR NAMES zmqpp.hpp 
+ PATHS
+ ${CMAKE_SOURCE_DIR}/lib/zmqpp/src/zmqpp)
+
+ find_library(ZMQPP_LIBRARY NAMES zmqpp 
+ PATHS ${CMAKE_SOURCE_DIR}/lib/zmqpp/build/max-g++)
+
+ if(ZMQPP_LIBRARY AND ZMQPP_INCLUDE_DIR)
+ message (STATUS "Using ZMQPP provided by the submodule.")
+ set(USE_SYSTEM_GMP TRUE)
+ else()
+ message (STATUS "ZMQPP submodule detection failed, please navigate to lib/zmqpp, initialize the submodule with \"git submodule update --init\", and then use \"make\" to build zmqpp")
+ endif()
+endif()
 include(FindPackageHandleStandardArgs)
 find_package_handle_standard_args(Zmqpp DEFAULT_MSG ZMQPP_LIBRARY ZMQPP_INCLUDE_DIR)