Hi all, I'm trying to build boost.log. I had it built and working against boost 1_47. I now have a clean 1_47 install on OSX (10.7.2) and I pulled boost.log from the trunk in sourceforge: https://boost-log.svn.sourceforge.net/svnroot/boost-log/trunk/ but when I build it, it reports that it needs 1_48. no problem - i'l build a boost 1_48 install and try that… boost 1_48 installed fine. I downloaded the boost.log from trunk and updated my kit and ran: ./bootstrap.sh -with-libraries=log --prefix=/usr/local --includedir=/usr/local/include --libdir=/usr/local/lib followed by: sudo ./b2 and I get the following: ...found 2606 targets... ...updating 9 targets... darwin.compile.c++ bin.v2/libs/log/build/darwin-4.2.1/release/threading-multi/tick_count.o libs/log/src/tick_count.cpp:220:5: error: #error Boost.Log: POSIX timers not supported on your platform "g++" -ftemplate-depth-128 -O3 -finline-functions -Wno-inline -Wall -dynamic -no-cpp- precomp -gdwarf-2 -fexceptions -fPIC -DBOOST_ALL_NO_LIB=1 DBOOST_DATE_TIME_DYN_LINK=1 - DBOOST_FILESYSTEM_DYN_LINK=1 -DBOOST_LOG_BUILDING_THE_LIB=1 -DBOOST_LOG_DLL - DBOOST_LOG_USE_NATIVE_SYSLOG=1 -DBOOST_SYSTEM_DYN_LINK=1 -DBOOST_THREAD_POSIX - DBOOST_THREAD_USE_DLL=1 - DDATE_TIME_INLINE -DNDEBUG -I"." -c -o "bin.v2/libs/log/build/darwin-4.2.1/release/threading-multi/tick_count.o" "libs/log/src/tick_count.cpp" Anyone shed any light on this? has the latest version of boost.log not been built on OSX lion? any help gratefully received, Chris