Re: [Boost-build] zlib and bipz2 not linking?

Subject: Re: [Boost-build] zlib and bipz2 not linking?
From: Kuhl, Brian (brian.kuhl_at_[hidden])
Date: 2018-09-07 20:55:55

Hi Steven,
So I have several '<library>object(file-target)@' but I don't think they are for /zlib and /bzip2?  There are 6  '<library>object' and 6 dependent Boost libraries on the link line.

If zlib and bzip2 were being passed I think I should see 8, do you agree?

Brian

../../../run_a_test.sh gzip_test  --debug-building  -n -d0  > out.txt
cat out.txt

Building target './gzip_test'
     Build request: object(property-set)@2701 <address-model>64 <cross-compile>vxworks    ...

... lots more stuff ...

     Usage requirements for gzip_test:  <include>../../.. <include>../../.. <library>object(searched-lib-target)@2717 <library>object(searched-lib-target)@2932 <relevant>context-impl   ...   <library>object(file-target)@3078 <library>object(file-target)@3102 <library>object(file-target)@3138 <relevant>context-impl  ...
     Build properties:   ...
     Usage requirements from gzip_test:  <define>BOOST_CHRONO_STATIC_LINK=1  ...  <include>../../.. <library>object(file-target)@3078 <library>object(file-target)@3102 <library>object(file-target)@3138 <library>object(searched-lib-target)@2717 ...  <use>object(file-target)@3138

    /yow-build62-lx2/bkuhl/vx7/compilers/llvm-6.0.0.2/LINUX386/bin/ldpentium -m elf_x86_64  -L"/yow-build62-lx2/bkuhl/work/VSB/usr/lib/common" -o "../../../bin.v2/libs/iostreams/test/gzip_test.test/clang-vxworks-4.2.1/debug/cross-compile-vxworks/static-only-on/gzip_test.vxe" /yow-build62-lx2/bkuhl/work/VSB/usr/lib/common//crt0.o "../../../bin.v2/libs/iostreams/test/gzip_test.test/clang-vxworks-4.2.1/debug/cross-compile-vxworks/static-only-on/gzip_test.o" "../../../bin.v2/libs/iostreams/build/clang-vxworks-4.2.1/debug/cross-compile-vxworks/static-only-on/libboost_iostreams.a" "../../../bin.v2/libs/test/build/clang-vxworks-4.2.1/debug/cross-compile-vxworks/static-only-on/libboost_unit_test_framework.a" "../../../bin.v2/libs/filesystem/build/clang-vxworks-4.2.1/debug/cross-compile-vxworks/static-only-on/libboost_filesystem.a" "../../../bin.v2/libs/timer/build/clang-vxworks-4.2.1/debug/cross-compile-vxworks/static-only-on/libboost_timer.a" "../../../bin.v2/libs/chrono/build/clang-vxworks-4.2.1/debug/cross-compile-vxworks/static-only-on/libboost_chrono.a" "../../../bin.v2/libs/system/build/clang-vxworks-4.2.1/debug/cross-compile-vxworks/static-only-on/libboost_system.a" --start-group -lunix -lnet  -lc  -lc_internal  -lllvm  -lcplusplus  -lllvmcplus  -ldl  -lsyscall      --end-group  --defsym __wrs_rtp_base=0x200000000 -u __tls__  -u __wr_need_frame_add -T/yow-build62-lx2/bkuhl/vx7/helix/guests/vxworks-7/build/tool/llvm_2016_04/usr/ldscript.vxe.x86-64   -L/yow-build62-lx2/bkuhl/work/VSB/usr/lib/common -z common-page-size=8192  -static

> -----Original Message-----
> From: Steven Watanabe [mailto:watanabesj_at_[hidden]]
> Sent: Friday, September 07, 2018 10:50 AM
> To: Boost.Build developer's and user's list
> Cc: Kuhl, Brian; Krejsa, Dan
> Subject: Re: [Boost-build] zlib and bipz2 not linking?
>
> AMDG
>
> On 09/06/2018 09:43 PM, Kuhl, Brian via Boost-build wrote:
> > Hi Experts,
> > When cross compiling for VxWorks on Linux  ...
> > In previous versions of Boost the presence of libz.a and libbz2.a were detected
> and linked into iostreams tests.
> > But with v1.68 the libraries are not being added to the link line.
> > Please see below for an example error.
> >
> > The config-cache and the build console indicate that libz and bzip are being
> found, it's just not being used when required.
> >
> > I'm having trouble deciphering ac.jam, so I was hopping someone could help
> me understand  how a dependency on /zlib//zlib is supposed to add -lz to the link
> line?
> > And why it might not work in my case?
> >
>
>   What's supposed to happen is that ac-library.construct returns a target
> representing -lz.  When boost_iostreams is built as a static library, it propagates
> this target to its dependencies as a <library> usage requirement.
> I would recommend --debug-building and/or --debug-generators, but that just
> shows the dependency as <library>object(file-target)@NNN which is not really
> useful.
>
>   Okay, try building just one test target with `--debug-building --debug-
> generators -n -d0`.
> There are two things that you should be looking for in the output.  First of all,
> there should be two lines like this:
>
>          Usage requirements for boost_iostreams:  ...
>          Build properties:  ... <install-dependencies>off
> <library>object(file-target)@4855 ...
>
> If the <library> is missing, then that means that zlib is not being passed to the
> boost_iostreams target.
>
> The second line to look for is:
>          Usage requirements from boost_iostreams:  <include>.
> <library>object(file-target)@4855 <relevant>address-model ...
>
> If there is no library here, then that means the problem is in the propagation of
> static libraries.
>
> > Many thanks,
> >
> > Brian Kuhl
> > Wind River
> >
> >
> > . ./vxworks_env.sh &&  cd status   &&  \
> >                     BOOST_TELNET_ADDR="localhost 20023"  \
> >                     LAYER_SRC_PATH="yow-build62-
> lx:VSB/3pp/BOOST/boost_1_68_0" \
> >                     PKG_SRC_BUILD_DIR="/yow-build62-
> lx2/bkuhl/work/VSB/3pp/BOOST/boost_1_68_0"  \
> >                     VSB_LD_LIBRARY_PATH="yow-build62-
> lx:VSB/usr/root/llvm/bin;yow-build62-lx:VSB/usr/lib/common" \
> > ../b2 -j1 --prefix=/yow-build62-lx2/bkuhl/work/VSB/usr/root --libdir=/yow-
> build62-lx2/bkuhl/work/VSB/usr/lib/common --includedir=/yow-build62-
> lx2/bkuhl/work/VSB/usr/h/public    toolset=clang-vxworks cross-
> compile=vxworks --reconfigure target-os=vxworks "variant=debug" address-
> model=64  static-only=on  "testing.launcher=./vxworks_boost_test_run.exp" "--
> limit-tests=iostreams|system" "--exclude-
> tests=coroutine2|function_types|functional|logic|rational" -d2
> > Performing configuration checks
> >     - default address-model    : 64-bit
> >     - default architecture     : x86
> >     - default address-model    : 64-bit
> >     - default architecture     : x86
> >     - symlinks supported       : yes
> >     - BOOST_COMP_GNUC >= 4.3.0 : no
> >     - zlib                     : yes
> >     - bzip2                    : yes
> >     - lzma                     : no
> > <snip>
> >
> >
> > clang-vxworks.link ../bin.v2/libs/iostreams/test/bzip2_test.test/clang-
> vxworks-4.2.1/debug/cross-compile-vxworks/static-only-on/bzip2_test.vxe
> >     /yow-build62-lx2/bkuhl/vx7/compilers/llvm-
> 6.0.0.2/LINUX386/bin/ldpentium -m elf_x86_64  -L"/yow-build62-
> lx2/bkuhl/work/VSB/usr/lib/common" -o
> "../bin.v2/libs/iostreams/test/bzip2_test.test/clang-vxworks-4.2.1/debug/cross-
> compile-vxworks/static-only-on/bzip2_test.vxe" /yow-build62-
> lx2/bkuhl/work/VSB/usr/lib/common//crt0.o
> "../bin.v2/libs/iostreams/test/bzip2_test.test/clang-vxworks-4.2.1/debug/cross-
> compile-vxworks/static-only-on/bzip2_test.o"
> "../bin.v2/libs/iostreams/build/clang-vxworks-4.2.1/debug/cross-compile-
> vxworks/static-only-on/libboost_iostreams.a" "../bin.v2/libs/test/build/clang-
> vxworks-4.2.1/debug/cross-compile-vxworks/static-only-
> on/libboost_unit_test_framework.a" "../bin.v2/libs/filesystem/build/clang-
> vxworks-4.2.1/debug/cross-compile-vxworks/static-only-
> on/libboost_filesystem.a" "../bin.v2/libs/timer/build/clang-vxworks-
> 4.2.1/debug/cross-compile-vxworks/static-only-on/libboost_timer.a"
> "../bin.v2/libs/chrono/build/clang-vxworks-4.2.1/debug/cross-compile-
> vxworks/static-only-on/libboost_chrono.a" "../bin.v2/libs/system/build/clang-
> vxworks-4.2.1/debug/cross-compile-vxworks/static-only-on/libboost_system.a"
> --start-group -lunix -lnet  -lc  -lc_internal  -lllvm  -lcplusplus  -lllvmcplus  -ldl  -
> lsyscall      --end-group  --defsym __wrs_rtp_base=0x200000000 -u __tls__  -u
> __wr_need_frame_add -T/yow-build62-lx2/bkuhl/vx7/helix/guests/vxworks-
> 7/build/tool/llvm_2016_04/usr/ldscript.vxe.x86-64   -L/yow-build62-
> lx2/bkuhl/work/VSB/usr/lib/common -z common-page-size=8192  -static
> > ../bin.v2/libs/iostreams/build/clang-vxworks-4.2.1/debug/cross-compile-
> vxworks/static-only-on/libboost_iostreams.a(bzip2.o): In function
> `boost::iostreams::detail::bzip2_base::end(bool)':
> > /yow-build62-
> lx2/bkuhl/work/VSB/3pp/BOOST/boost_1_68_0/status/../libs/iostreams/src/bzi
> p2.cpp:121: undefined reference to `BZ2_bzCompressEnd'
> > <snip>