fix unit test with old versions of boost

gcontini

2020-02-10 205c71575c272a685011c641a33d26cf66cf60a0

 src/library/os/CMakeLists.txt

@@ -1,17 +1,22 @@
IF(UNIX OR OPENSSL_FOUND)
   IF(UNIX)
      target_sources(licensecc_static PRIVATE
          ${CMAKE_CURRENT_SOURCE_DIR}/openssl/signature_verifier.cpp
          ${CMAKE_CURRENT_SOURCE_DIR}/os-linux.c 
          ${CMAKE_CURRENT_SOURCE_DIR}/network_id.c)
      add_library(os OBJECT
          openssl/signature_verifier.cpp
          linux/execution_environment.cpp
          cpu_info_common.cpp
          linux/cpu_info.cpp
          linux/network.cpp
          linux/os-linux.c) 
   ELSE(UNIX)
         target_sources(licensecc_static PRIVATE
          ${CMAKE_CURRENT_SOURCE_DIR}/openssl/signature_verifier.cpp
            ${CMAKE_CURRENT_SOURCE_DIR}/os-win.c)
         add_library(os OBJECT 
         cpu_info_common.cpp openssl/signature_verifier.cpp windows/os-win.c)
   ENDIF(UNIX)
ELSE(UNIX OR OPENSSL_FOUND)
    target_sources(licensecc_static PRIVATE
        ${CMAKE_CURRENT_SOURCE_DIR}/windows/signature_verifier.cpp
        ${CMAKE_CURRENT_SOURCE_DIR}/os-win.c)
    target_sources(os OBJECT
        cpu_info_common.cpp windows/signature_verifier.cpp windows/os-win.c)
ENDIF(UNIX OR OPENSSL_FOUND)

if(CODE_COVERAGE AND UNIX)
     MESSAGE(STATUS "Enabling code coverage")
     target_compile_options(os PUBLIC -O0 -g --coverage)
endif(CODE_COVERAGE AND UNIX)