Hello, I tried to compile boost with gcc 3.4.x and 4.0.2 on Linux. With the latter I finally managed to build boost but let's come to this later. I tried gcc 3.4.2 and 3.4.4 both producing the following errors: `.L17959' referenced in section `.rodata' of bin/boost/libs/regex/build/libboost_regex.so/gcc/release/shared-linkable-true/ instances.o: defined in discarded section `.gnu.linkonce.t._ZN5boost9re_detail12perl_matcherIN9__gnu_cxx17__normal_iterator IPKcSsEESaINS_9sub_matchIS6_EEENS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEE15match_startmarkEv' of bin/boost/libs/regex/ build/libboost_regex.so/gcc/release/shared-linkable-true/instances.o ... see the complete logfile at http://lospalmos.net/boost-logs/boost-gcc-3.4.4.log This happens with different versions of binutils. With gcc4 these linker errors vanished, but I figured out that there are hardcoded depencies on libicu even when the build system claims that it has switched ICU off. So the log says: Building Boost.Regex with the optional Unicode/ICU support disabled. Please refer to the Boost.Regex documentation for more information (and if you don't know what ICU is then you probably don't need it). but later I found that errors on 8 targets: /usr/lib/gcc/i586-unknown-linux-gnu/4.0.2/../../../../i586-unknown-linux-gnu/bin/ld: cannot find -licui18n collect2: ld returned 1 exit status see the complete log at http://lospalmos.net/boost-logs/boost-gcc-4.0.2.log I "fixed" this by installing ICU but still consider it a bug. Cheers, Daniel who is currently working on the boost package for ROCK Linux