Dear all, I have built boost under windows by using Cygwin and the usual configure, make, make install approach and for the gcc toolset I think this was the default one so that I have not done any configuration changes.(however i got a message that not all boost libraries are not properly installed.) I am trying to compile a very simple program to see whether things are going fine or not, (Since I have a program which is actually written under LINUX by using boost library, I have to port that to windows for a small project.) I am using the cygwin command line tool . I am supplying the include file directories for include options(-I/usr/local/include/boost-1_33_1/boost/ since I use Cygwin) but I do not know what to supply for link options(I was supplying "-L/usr/local/opt/boost-1_33_1/ lib -lboost_filesystem-gcc" under linux but did not work for windows, I have changed the path to proper values.) I have check the libboost_... under libs/ but confused me more. I am quite new to library build and compilation and linkage with the library(at least under windows since under linux pre-built packages are easily downloaded by an apt-get), maybe I am mistaken at some points above, but I appreciate advice and help. Have fun, UMUT