building project Jamfile</path/to/here>  ('object(project-target)@54') with

     Building target './a'
         Build request:  object(property-set)@9
         Command line free features: 
         Target requirements:  <threading>multi <toolset>msvc,<runtime-link>shared:<threading>multi

         Common properties:  <asynch-exceptions>off <debug-store>object <debug-symbols>on <embed-manifest>on <exception-handling>on <extern-c-nothrow>off <hardcode-dll-paths>true <host-os>freebsd <inlining>off <install-dependencies>off <link>shared <midl-robust>yes <midl-stubless-proxy>yes <optimization>off <os>FREEBSD <pch>on <profiling>off <rtti>on <runtime-debugging>on <runtime-link>shared <stdlib>native <strip>off <suppress-import-lib>false <symlink-location>project-relative <target-os>freebsd <threading>multi <toolset-gcc:version>4.5 <toolset>gcc <user-interface>console <variant>debug <warnings-as-errors>off <warnings>on

         Usage requirements for a: 
         Build properties:  <asynch-exceptions>off <debug-store>object <debug-symbols>on <embed-manifest>on <exception-handling>on <extern-c-nothrow>off <hardcode-dll-paths>true <host-os>freebsd <inlining>off <install-dependencies>off <link>shared <midl-robust>yes <midl-stubless-proxy>yes <optimization>off <os>FREEBSD <pch>on <profiling>off <rtti>on <runtime-debugging>on <runtime-link>shared <stdlib>native <strip>off <suppress-import-lib>false <symlink-location>project-relative <target-os>freebsd <threading>multi <toolset-gcc:version>4.5 <toolset>gcc <user-interface>console <variant>debug <warnings-as-errors>off <warnings>on
         Usage requirements from a:  <threading>multi <xdll-path>/path/to/here/bin/gcc-4.5/debug/threading-multi

     Building target './e'
         Build request:  object(property-set)@9
         Command line free features: 
         Target requirements:  <toolset>msvc,<runtime-link>shared:<threading>multi

         Common properties:  <asynch-exceptions>off <debug-store>object <debug-symbols>on <embed-manifest>on <exception-handling>on <extern-c-nothrow>off <hardcode-dll-paths>true <host-os>freebsd <inlining>off <install-dependencies>off <link>shared <midl-robust>yes <midl-stubless-proxy>yes <optimization>off <os>FREEBSD <pch>on <profiling>off <rtti>on <runtime-debugging>on <runtime-link>shared <stdlib>native <strip>off <suppress-import-lib>false <symlink-location>project-relative <target-os>freebsd <threading>single <toolset-gcc:version>4.5 <toolset>gcc <user-interface>console <variant>debug <warnings-as-errors>off <warnings>on

         Building target './a'
             Build request:  object(property-set)@82 <asynch-exceptions>off <debug-store>object <debug-symbols>on <embed-manifest>on <exception-handling>on <extern-c-nothrow>off <inlining>off <link>shared <midl-robust>yes <midl-stubless-proxy>yes <optimization>off <os>FREEBSD <pch>on <profiling>off <rtti>on <runtime-debugging>on <runtime-link>shared <stdlib>native <strip>off <target-os>freebsd <threading>single <toolset-gcc:version>4.5 <toolset>gcc <variant>debug <warnings-as-errors>off <warnings>on
             Command line free features: 
             Target requirements:  <threading>multi <toolset>msvc,<runtime-link>shared:<threading>multi

             Common properties:  <asynch-exceptions>off <debug-store>object <debug-symbols>on <embed-manifest>on <exception-handling>on <extern-c-nothrow>off <hardcode-dll-paths>true <host-os>freebsd <inlining>off <install-dependencies>off <link>shared <midl-robust>yes <midl-stubless-proxy>yes <optimization>off <os>FREEBSD <pch>on <profiling>off <rtti>on <runtime-debugging>on <runtime-link>shared <stdlib>native <strip>off <suppress-import-lib>false <symlink-location>project-relative <target-os>freebsd <threading>multi <toolset-gcc:version>4.5 <toolset>gcc <user-interface>console <variant>debug <warnings-as-errors>off <warnings>on

             Usage requirements for a: 
             Build properties:  <asynch-exceptions>off <debug-store>object <debug-symbols>on <embed-manifest>on <exception-handling>on <extern-c-nothrow>off <hardcode-dll-paths>true <host-os>freebsd <inlining>off <install-dependencies>off <link>shared <midl-robust>yes <midl-stubless-proxy>yes <optimization>off <os>FREEBSD <pch>on <profiling>off <rtti>on <runtime-debugging>on <runtime-link>shared <stdlib>native <strip>off <suppress-import-lib>false <symlink-location>project-relative <target-os>freebsd <threading>multi <toolset-gcc:version>4.5 <toolset>gcc <user-interface>console <variant>debug <warnings-as-errors>off <warnings>on
             Usage requirements from a:  <threading>multi <xdll-path>/path/to/here/bin/gcc-4.5/debug/threading-multi

         Usage requirements for e:  <threading>multi <xdll-path>/path/to/here/bin/gcc-4.5/debug/threading-multi
         Build properties:  <asynch-exceptions>off <debug-store>object <debug-symbols>on <embed-manifest>on <exception-handling>on <extern-c-nothrow>off <hardcode-dll-paths>true <host-os>freebsd <inlining>off <install-dependencies>off <link>shared <midl-robust>yes <midl-stubless-proxy>yes <optimization>off <os>FREEBSD <pch>on <profiling>off <rtti>on <runtime-debugging>on <runtime-link>shared <stdlib>native <strip>off <suppress-import-lib>false <symlink-location>project-relative <target-os>freebsd <threading>multi <threading>single <toolset-gcc:version>4.5 <toolset>gcc <user-interface>console <variant>debug <warnings-as-errors>off <warnings>on <xdll-path>/path/to/here/bin/gcc-4.5/debug/threading-multi
         Usage requirements from e:  <threading>multi <xdll-path>/path/to/here/bin/gcc-4.5/debug/threading-multi
...found 14 targets...
...updating 4 targets...
gcc.compile.c++ bin/gcc-4.5/debug/threading-multi/a.o
gcc.link.dll bin/gcc-4.5/debug/threading-multi/liba.so
gcc.compile.c++ bin/gcc-4.5/debug/threading-multi/e.o
gcc.link bin/gcc-4.5/debug/threading-multi/e
bin/gcc-4.5/debug/threading-multi/liba.so: undefined reference to `pthread_create'
collect2: ld returned 1 exit status

    "/usr/local/bin/g++"  -Wl,-R -Wl,"/path/to/here/bin/gcc-4.5/debug/threading-multi" -Wl,-rpath-link -Wl,"/path/to/here/bin/gcc-4.5/debug/threading-multi" -o "bin/gcc-4.5/debug/threading-multi/e" -Wl,--start-group "bin/gcc-4.5/debug/threading-multi/e.o" "bin/gcc-4.5/debug/threading-multi/liba.so"  -Wl,-Bstatic  -Wl,-Bdynamic  -Wl,--end-group -g 


...failed gcc.link bin/gcc-4.5/debug/threading-multi/e...
...failed updating 1 target...
...updated 3 targets...