Hi, my log file was scrubbed in my previous post. So I'm posting it again, sorry. I'm a newbie and I'm trying to build boost on a Mac OS X 10.4.11. I'm not able to generate the dylib files so something is going wrong. dhcp25:/usr/local/lib/boost_1_37_0 root# ./configure --with- libraries=iostreams Building Boost.Jam with toolset darwin... tools/jam/src/bin.macosxx86/ bjam Unicode/ICU support for Boost.Regex?... not found. Backing up existing Boost.Build configuration in user-config.jam.4 Generating Boost.Build configuration in user-config.jam... Generating Makefile... dhcp25:/usr/local/lib/boost_1_37_0 root# make install ./tools/jam/src/bin.macosxx86/bjam --user-config=user-config.jam -- prefix=/usr/local --exec-prefix=/usr/local --libdir=/usr/local/lib -- includedir=/usr/local/include --with-iostreams install ...patience... ...found 14372 targets... ...updating 21 targets... MkDir1-quick-fix-for-unix bin.v2/libs/iostreams MkDir1-quick-fix-for-unix bin.v2/libs/iostreams/build MkDir1-quick-fix-for-unix bin.v2/libs/iostreams/build/darwin-4.0.1 MkDir1-quick-fix-for-unix bin.v2/libs/iostreams/build/darwin-4.0.1/ release MkDir1-quick-fix-for-unix bin.v2/libs/iostreams/build/darwin-4.0.1/ release/threading-multi darwin.compile.c++ bin.v2/libs/iostreams/build/darwin-4.0.1/release/ threading-multi/file_descriptor.o /var/tmp//cc3iqlUI.s:7843:Complex expression. Absolute segment assumed. /var/tmp//cc3iqlUI.s:7845:Complex expression. Absolute segment assumed. /var/tmp//cc3iqlUI.s:7850:Complex expression. Absolute segment assumed. /var/tmp//cc3iqlUI.s:7852:Complex expression. Absolute segment assumed. /var/tmp//cc3iqlUI.s:7856:Complex expression. Absolute segment assumed. ... "g++" -ftemplate-depth-128 -O3 -finline-functions -Wno-inline - Wall -dynamic -no-cpp-precomp -gdwarf-2 -Wno-long-double -fPIC - DBOOST_ALL_NO_LIB=1 -DBOOST_IOSTREAMS_DYN_LINK=1 -DNDEBUG -I"." -c - o "bin.v2/libs/iostreams/build/darwin-4.0.1/release/threading-multi/ file_descriptor.o" "libs/iostreams/src/file_descriptor.cpp" ...failed darwin.compile.c++ bin.v2/libs/iostreams/build/darwin-4.0.1/ release/threading-multi/file_descriptor.o... darwin.compile.c++ bin.v2/libs/iostreams/build/darwin-4.0.1/release/ threading-multi/mapped_file.o /var/tmp//ccuFxoHi.s:15391:Complex expression. Absolute segment assumed. /var/tmp//ccuFxoHi.s:15393:Complex expression. Absolute segment assumed. /var/tmp//ccuFxoHi.s:15398:Complex expression. Absolute segment assumed. /var/tmp//ccuFxoHi.s:15400:Complex expression. Absolute segment assumed. .... "g++" -ftemplate-depth-128 -O3 -finline-functions -Wno-inline - Wall -dynamic -no-cpp-precomp -gdwarf-2 -Wno-long-double -fPIC - DBOOST_ALL_NO_LIB=1 -DBOOST_IOSTREAMS_DYN_LINK=1 -DNDEBUG -I"." -c - o "bin.v2/libs/iostreams/build/darwin-4.0.1/release/threading-multi/ mapped_file.o" "libs/iostreams/src/mapped_file.cpp" ...failed darwin.compile.c++ bin.v2/libs/iostreams/build/darwin-4.0.1/ release/threading-multi/mapped_file.o... darwin.compile.c++ bin.v2/libs/iostreams/build/darwin-4.0.1/release/ threading-multi/zlib.o darwin.compile.c++ bin.v2/libs/iostreams/build/darwin-4.0.1/release/ threading-multi/bzip2.o ...skipped <pbin.v2/libs/iostreams/build/darwin-4.0.1/release/ threading-multi>libboost_iostreams-xgcc40-mt-1_37.dylib for lack of <pbin.v2/libs/iostreams/build/darwin-4.0.1/release/threading- multi>file_descriptor.o... ...skipped <p/usr/local/lib>libboost_iostreams-xgcc40-mt-1_37.dylib for lack of <pbin.v2/libs/iostreams/build/darwin-4.0.1/release/ threading-multi>libboost_iostreams-xgcc40-mt-1_37.dylib... ...skipped <p/usr/local/lib>libboost_iostreams-xgcc40-mt.dylib for lack of <p/usr/local/lib>libboost_iostreams-xgcc40-mt-1_37.dylib... MkDir1-quick-fix-for-unix bin.v2/libs/iostreams/build/darwin-4.0.1/ release/link-static MkDir1-quick-fix-for-unix bin.v2/libs/iostreams/build/darwin-4.0.1/ release/link-static/threading-multi darwin.compile.c++ bin.v2/libs/iostreams/build/darwin-4.0.1/release/ link-static/threading-multi/file_descriptor.o /var/tmp//ccgEKwgZ.s:7843:Complex expression. Absolute segment assumed. / "g++" -ftemplate-depth-128 -O3 -finline-functions -Wno-inline - Wall -no-cpp-precomp -gdwarf-2 -Wno-long-double -DBOOST_ALL_NO_LIB=1 -DNDEBUG -I"." -c -o "bin.v2/libs/iostreams/build/darwin-4.0.1/ release/link-static/threading-multi/file_descriptor.o" "libs/ iostreams/src/file_descriptor.cpp" ...failed darwin.compile.c++ bin.v2/libs/iostreams/build/darwin-4.0.1/ release/link-static/threading-multi/file_descriptor.o... darwin.compile.c++ bin.v2/libs/iostreams/build/darwin-4.0.1/release/ link-static/threading-multi/mapped_file.o /var/tmp//ccDow0aV.s:15391:Complex expression. Absolute segment assumed. /var/tmp//ccDow0aV.s:15393:Complex expression. Absolute segment assumed. /var/tmp//ccDow0aV.s:15398:Complex expression. Absolute segment assumed. /var/tmp//ccDow0aV.s:15400:Complex expression. Absolute segment assumed. /var/tmp//ccDow0aV.s:15404:Complex expression. Absolute segment assumed. /var/tmp//ccDow0aV.s:35405:Complex expression. Absolute segment assumed. "g++" -ftemplate-depth-128 -O3 -finline-functions -Wno-inline - Wall -no-cpp-precomp -gdwarf-2 -Wno-long-double -DBOOST_ALL_NO_LIB=1 -DNDEBUG -I"." -c -o "bin.v2/libs/iostreams/build/darwin-4.0.1/ release/link-static/threading-multi/mapped_file.o" "libs/iostreams/ src/mapped_file.cpp" ...failed darwin.compile.c++ bin.v2/libs/iostreams/build/darwin-4.0.1/ release/link-static/threading-multi/mapped_file.o... darwin.compile.c++ bin.v2/libs/iostreams/build/darwin-4.0.1/release/ link-static/threading-multi/zlib.o darwin.compile.c++ bin.v2/libs/iostreams/build/darwin-4.0.1/release/ link-static/threading-multi/bzip2.o ...skipped <pbin.v2/libs/iostreams/build/darwin-4.0.1/release/link- static/threading-multi>libboost_iostreams-xgcc40-mt-1_37.a for lack of <pbin.v2/libs/iostreams/build/darwin-4.0.1/release/link-static/ threading-multi>file_descriptor.o... ...skipped <p/usr/local/lib>libboost_iostreams-xgcc40-mt-1_37.a for lack of <pbin.v2/libs/iostreams/build/darwin-4.0.1/release/link- static/threading-multi>libboost_iostreams-xgcc40-mt-1_37.a... ...skipped <p/usr/local/lib>libboost_iostreams-xgcc40-mt.a for lack of <p/usr/local/lib>libboost_iostreams-xgcc40-mt-1_37.a... ...failed updating 4 targets... ...skipped 6 targets... ...updated 11 targets... Not all Boost libraries built properly. Thanks a lot for your help. Best, Vincenzo