add logging, use boost.log.

lichao

2021-05-06 0117d5f8ff386075b0c4cbec0cbe460fe3cfa680

 box/CMakeLists.txt

@@ -6,6 +6,7 @@
set(BinTarget ${Target}-bin)

include_directories(../src)
include_directories(../log)
add_library(${Target} ${lib_sources})
add_executable(${BinTarget} ${exe_sources})