[meta,cmake] Restructure project and introduce CMake tooling

Rearrange project to conform to current best-practices in modern C++ repo organization.

Introduce initial configuration file for the CMake meta-build system, based on the restructured organization.

CMakeLists.txt

@@ -31,6 +31,7 @@ add_library(LibSCDAQ ${SOURCE_FILES})
 set(CMAKE_MODULE_PATH "${CMAKE_MODULE_PATH}" "${SCDAQ_CMAKE_MODS_DIR}")
 set(Boost_USE_MULTITHREADED ON)
 set(micron_USE_STATIC_LIBS ON)
+set(Threads_PREFER_PTHREAD_FLAG ON)
 
 find_package(Threads REQUIRED)
 find_package(crypto REQUIRED MODULE)
@@ -47,14 +48,14 @@ find_library(micron_STATIC_LIBRARY
 if (Boost_FOUND AND TBB_FOUND AND CURL_FOUND)
     # For older compilers that do not devise *.cc as C++
     set_target_properties(LibSCDAQ PROPERTIES LINKER_LANGUAGE CXX)
-    set_target_properties(${SCDAQ_TARGET}  PROPERTIES LINKER_LANGUAGE CXX)
     # Build library and link to dependencies
     target_include_directories(LibSCDAQ PRIVATE ${Boost_INCLUDE_DIRS} ${CURL_INCLUDE_DIR})
-    target_link_libraries(LibSCDAQ PUBLIC ${Boost_LIBRARIES} ${CURL_LIBRARIES} ${TBB_LIBRARIES} ${Threads_LIBRARIES} crypto micron)
+    target_link_libraries(LibSCDAQ PUBLIC ${Boost_LIBRARIES} ${CURL_LIBRARIES} ${TBB_LIBRARIES} -pthread crypto micron)
     # Public options for library are imposed on dependants (i.e., main executable)
     target_compile_options(LibSCDAQ PUBLIC -std=c++11 -Wall -Wextra -Wpedantic)
     # Build main executable and link it to SCDAQ library
     add_executable(${SCDAQ_TARGET} ${SCDAQ_SOURCE_DIR}/scdaq.cc)
+    set_target_properties(${SCDAQ_TARGET}  PROPERTIES LINKER_LANGUAGE CXX)
     target_link_libraries(${SCDAQ_TARGET} PUBLIC LibSCDAQ)
     # Toggle CLI Debug build option
     target_compile_definitions(${SCDAQ_TARGET} PRIVATE $<$<CONFIG:Debug>: ${SCDAQ_TARGET}_DEBUG=1 >)