Hi, When I build the library (1.55.0 rc2) on x86_64 linux using a gcc cross-compiler to target i686-w64-mingw32 or x86_64-w64-mingw32, I get this error in the 'log' library: gcc.compile.c++ bin.v2/libs/log/build/gcc-mingw-4.8.2/release/address-model-32/link-static/log-api-winnt/target-os-windows/threadapi-win32/threading-multi/event_log_backend.o "i686-w64-mingw32-g++-4.8.2" -ftemplate-depth-128 -O3 -finline-functions -Wno-inline -Wall -mthreads -m32 -fno-strict-aliasing -ftemplate-depth-1024 -DBOOST_ALL_NO_LIB=1 -DBOOST_CHRONO_STATIC_LINK=1 -DBOOST_FILESYSTEM_STATIC_LINK=1 -DBOOST_LOG_BUILDING_THE_LIB=1 -DBOOST_LOG_USE_AVX2 -DBOOST_LOG_USE_SSSE3 -DBOOST_SPIRIT_USE_PHOENIX_V3=1 -DBOOST_SYSTEM_NO_DEPRECATED -DBOOST_SYSTEM_STATIC_LINK=1 -DBOOST_THREAD_BUILD_LIB=1 -DBOOST_THREAD_DONT_USE_CHRONO=1 -DBOOST_THREAD_USE_LIB=1 -DDATE_TIME_INLINE -DNDEBUG -I"." -I"bin.v2/libs/log/build/gcc-mingw-4.8.2/release/address-model-32/link-static/log-api-winnt/target-os-windows/threadapi-win32/threading-multi" -c -o "bin.v2/libs/log/build/gcc-mingw-4.8.2/release/address-model-32/link-static/log-api-winnt/target-os-windows/threadapi-win32/threading-multi/event_log_backend.o" "libs/log/src/event_log_backend.cpp" libs/log/src/event_log_backend.cpp:36:30: fatal error: simple_event_log.h: No such file or directory #include "simple_event_log.h" ^ compilation terminated. ...failed gcc.compile.c++ bin.v2/libs/log/build/gcc-mingw-4.8.2/release/address-model-32/link-static/log-api-winnt/target-os-windows/threadapi-win32/threading-multi/event_log_backend.o... Here are my commands: $ CC="i686-w64-mingw32-gcc-4.8.2" CFLAGS="-O2 -DNDEBUG -ffloat-store" CXX="i686-w64-mingw32-g++-4.8.2" CXXFLAGS="-O2 -DNDEBUG -ffloat-store -std=c++98 -DBOOST_THREAD_USE_LIB" AR="i686-w64-mingw32-ar" AS="i686-w64-mingw32-as" RANLIB="i686-w64-mingw32-ranlib" ./bootstrap.sh --without-icu --prefix=/cm/shared/apps/soft/bal/usr/mingw32-4.8.2-c++98-release/boost --with-toolset=gcc $ ./b2 -d2 -j16 -sBZIP2_INCLUDE=/path/to/mingw32-4.8.2-c++98-release/bzip2/include -sBZIP2_LIBPATH=/path/to/mingw32-4.8.2-c++98-release/bzip2/lib -sZLIB_INCLUDE=/path/to/mingw32-4.8.2-c++98-release/zlib/include -sZLIB_LIBPATH=/path/to/mingw32-4.8.2-c++98-release/zlib/lib --layout=system --user-config=user-config.jam --without-mpi --without-python --without-context --without-coroutine link=static threading=multi runtime-link=shared target-os=windows threadapi=win32 address-model=32 variant=release install