Problems with building boost system library using mingw

[piotrek.orzechowski@…]

I'm trying to build 'system' library from Boost under Windows using command:

bjam --toolset=gcc target-os=qnx --build-dir=c:\boost_1_57_0 --build-type=complete --with-system stage

and keep getting error:

C:\boost_1_57_0>bjam --toolset=gcc target-os=qnx --build-dir=c:\boost_1_57_0 --build-type=complete --with-system stage ...found 1 target... ...updating 1 target... config-cache.write c:\boost_1_57_0\boost\bin.v2\project-cache.jam ...updated 1 target...

Component configuration:

• atomic : not building
• chrono : not building
• container : not building
• context : not building
• coroutine : not building
• date_time : not building
• exception : not building
• filesystem : not building
• graph : not building
• graph_parallel : not building
• iostreams : not building
• locale : not building
• log : not building
• math : not building
• mpi : not building
• program_options : not building
• python : not building
• random : not building
• regex : not building
• serialization : not building
• signals : not building
• system : building
• test : not building
• thread : not building
• timer : not building
• wave : not building

...found 205 targets... ...updating 4 targets... gcc.link.dll c:\boost_1_57_0\boost\bin.v2\libs\system\build\gcc-mingw-4.8.1\debug\target-os-qnx\threading-multi\libboost_system-mgw48-mt-d-1_57.so.1.57.0 c:/mingw/bin/../lib/gcc/mingw32/4.8.1/../../../../mingw32/bin/ld.exe: cannot find -lrt collect2.exe: error: ld returned 1 exit status

"g++" -o "c:\boost_1_57_0\boost\bin.v2\libs\system\build\gcc-mingw-4.8.1\debug\target-os-qnx\threading-multi\libboost_system-mgw48-mt-d-1_57.so.1.57.0"

-shared -Wl,--start-group "c:\boost_1_57 _0\boost\bin.v2\libs\system\build\gcc-mingw-4.8.1\debug\target-os-qnx\threading-multi\error_code.o" -Wl,-Bstatic -Wl,-Bdynamic -lrt -Wl,--end-group -g -pthread

...failed gcc.link.dll c:\boost_1_57_0\boost\bin.v2\libs\system\build\gcc-mingw-4.8.1\debug\target-os-qnx\threading-multi\libboost_system-mgw48-mt-d-1_57.so.1.57.0... ...skipped <pstage\lib>libboost_system-mgw48-mt-d-1_57.so.1.57.0 for lack of <pc:\boost_1_57_0\boost\bin.v2\libs\system\build\gcc-mingw-4.8.1\debug\target-os-qnx\threading-multi>libboost_system-mgw48- mt-d-1_57.so.1.57.0... gcc.link.dll c:\boost_1_57_0\boost\bin.v2\libs\system\build\gcc-mingw-4.8.1\release\target-os-qnx\threading-multi\libboost_system-mgw48-mt-1_57.so.1.57.0 c:/mingw/bin/../lib/gcc/mingw32/4.8.1/../../../../mingw32/bin/ld.exe: cannot find -lrt collect2.exe: error: ld returned 1 exit status

"g++" -o "c:\boost_1_57_0\boost\bin.v2\libs\system\build\gcc-mingw-4.8.1\release\target-os-qnx\threading-multi\libboost_system-mgw48-mt-1_57.so.1.57.0"

-shared -Wl,--start-group "c:\boost_1_57 _0\boost\bin.v2\libs\system\build\gcc-mingw-4.8.1\release\target-os-qnx\threading-multi\error_code.o" -Wl,-Bstatic -Wl,-Bdynamic -lrt -Wl,--end-group -pthread

...failed gcc.link.dll c:\boost_1_57_0\boost\bin.v2\libs\system\build\gcc-mingw-4.8.1\release\target-os-qnx\threading-multi\libboost_system-mgw48-mt-1_57.so.1.57.0... ...skipped <pstage\lib>libboost_system-mgw48-mt-1_57.so.1.57.0 for lack of <pc:\boost_1_57_0\boost\bin.v2\libs\system\build\gcc-mingw-4.8.1\release\target-os-qnx\threading-multi>libboost_system-mgw48- mt-1_57.so.1.57.0... ...failed updating 2 targets... ...skipped 2 targets...

The rt lib seems to be missing, where can I obtain such lib to successfully compile 'system' lib?

Changing bootstrap argument between gcc / mingw doesn't help. Before using bootstrap I set path to mingw using:

set PATH=c:\mingw\bin;%PATH%

and change bootstrap.bat in line 38 to:

set toolset=gcc

Any idea how to successfully compile system library under windows for QNX?