scaffold some common services

common/CMakeLists.txt

@@ -0,0 +1,20 @@
+
+add_library(accordion-common STATIC
+    LoggerService.cpp
+    config/ConfigService.cpp
+)
+
+target_include_directories(accordion-common PUBLIC
+    ${CMAKE_CURRENT_SOURCE_DIR}/../
+    ${libconfig_SOURCE_DIR}/lib
+)
+
+target_link_libraries(accordion-common PUBLIC
+    config++ # note: differs on windows (ld automatically adds 'lib' to library searches and would look for 'liblibconfig++' if we didnt strip it)
+             # rare linux < windows right hereg
+)
+
+target_compile_definitions(accordion-common PRIVATE
+    # pass in some compiler macros
+    BINARY_DIR="${CMAKE_BINARY_DIR}" # useful for runtime filepaths
+)