Add Schedd plugin to synch with CC.

This should be much more reliable, albeit being more prone to crash a HTCondor component (the schedd) if there's a bug...

CMakeLists.txt

@@ -0,0 +1,44 @@
+project(htcondor-cc-sync-plugin LANGUAGES CXX)
+cmake_minimum_required(VERSION 3.12)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_EXTENSIONS OFF)
+
+if(NOT DEFINED CONDOR_SRC OR NOT EXISTS ${CONDOR_SRC})
+    message(FATAL_ERROR "No valid path to HTCondor source directory provided! Provide -DCONDOR_SRC=..")
+else()
+    set(CONDOR_SRC ${CONDOR_SRC} CACHE STRING "Path to HTCondor source directory")
+    set(CONDOR_SRC_SRC ${CONDOR_SRC}/src/)
+endif()
+
+if(NOT DEFINED CONDOR_BUILD OR NOT EXISTS ${CONDOR_BUILD})
+    message(FATAL_ERROR "No valid path to HTCondor build directory provided! Provide -DCONDOR_BUILD=..")
+else()
+    set(CONDOR_BUILD ${CONDOR_SRC} CACHE STRING "Path to HTCondor build directory")
+    set(CONDOR_BUILD_SRC ${CONDOR_BUILD}/src/)
+endif()
+
+add_subdirectory(curlpp)
+set_property(TARGET curlpp_static PROPERTY POSITION_INDEPENDENT_CODE ON)
+
+add_library(htcondor_cc_sync_plugin MODULE htcondor_cc_sync_plugin.cpp)
+
+target_include_directories(htcondor_cc_sync_plugin PRIVATE
+    ${CONDOR_SRC_SRC}
+    ${CONDOR_SRC_SRC}condor_includes
+    ${CONDOR_SRC_SRC}condor_utils
+    ${CONDOR_SRC_SRC}classad
+    ${CONDOR_SRC_SRC}safefile
+    ${CONDOR_BUILD_SRC}condor_includes
+    ${CONDOR_BUILD_SRC}condor_utils
+    ${CONDOR_BUILD_SRC}safefile
+    ${CURLPP_INCLUDE_DIRS})
+
+target_link_libraries(htcondor_cc_sync_plugin PRIVATE curlpp_static)
+target_link_options(htcondor_cc_sync_plugin PRIVATE -rdynamic)
+set_target_properties(htcondor_cc_sync_plugin PROPERTIES ENABLE_EXPORTS 1)
+target_include_directories(htcondor_cc_sync_plugin PRIVATE ${CMAKE_SOURCE_DIR}/curlpp/include)
+
+target_compile_options(htcondor_cc_sync_plugin PRIVATE
+    -DCONDOR_VERSION=\"10.0.0\" -DENABLE_STATE_DUMP -DGLIBC219=GLIBC219 -DGLIBC=GLIBC -DHAVE_CONFIG_H -DLINUX=\"LINUX_3.13.0-30-GENERIC\" -DPLATFORM=\"X86_64-Linux_17\" -DPRE_RELEASE_STR=\"\" -DWITH_OPENSSL -DX86_64=X86_64 -Dcondorapi_shared_EXPORTS -DWITH_IPV6)