Hi, I have two locally built g++'s and want to build boosts to go with them. Unfortunately I've never used jam and despite reading the docs haven't succeeded. I created a user-config.jam file with the single line: using gcc : 4.7 : /home/mark/opt/gcc47/bin/g++ : <compileflags>-std=c++11 -pedantic <linkflags>-lstdc++ -lpthread -L/home/mark/opt/gcc47/lib -L/home/mark/opt/gcc47/lib64 <address-model>64; but this seems to be ignored. All I want to do is build boost for my local g++ 4.6 in ~/opt/gcc46 and my local g++ 4.7 in ~/opt/gcc47. Can anyone give me or point me to some simple instructions for doing this? I did not find http://www.boost.org/doc/libs/1_49_0/more/getting_started/unix-variants.html at all helpful for my situation. In particular, section 5.2 didn't help and b2 just keeps using the system's /usr/bin/g++. (I want boost primarily for its regex library.) Thanks! PS I'm not a subscriber so would appreciate being cc'd in any reply. -- Mark Summerfield, Qtrac Ltd, www.qtrac.eu C++, Python, Qt, PyQt - training and consultancy "Programming in Go" - ISBN 0321774639 http://www.qtrac.eu/gobook.html