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Subject: Re: [Boost-users] [bjam] Generated path approaches 255 character OS limit
From: Mat Marcus (mat-lists_at_[hidden])
Date: 2008-11-06 13:52:13

On Thu, Nov 6, 2008 at 9:54 AM, Vladimir Prus <vladimir_at_[hidden]> wrote:
> Steven Watanabe wrote:
>> Peter Klotz wrote:
>>> When compiling Boost 1.37.0 using this bjam command line under Windows I obtained the error
>>> message below:
>>> bjam -q -sNO_COMPRESSION=1 --build-type=complete --without-graph --without-math --without-mpi
>>> --without-python --without-serialization --without-signals --without-wave --toolset=msvc-8.0
>>> architecture=x86 address-model=64
>>> failed to write output file
>>> 'bin.v2\libs\test\build\msvc-8.0\debug\address-model-64\architecture-x86\asynch-exceptions-on\link-static\runtime-link-static\threading-multi\libboost_prg_exec_monitor-vc80-mt-sgd-1_37.lib.rsp'!
>>> Obviously the path I started from (70 characters) combined with the bjam generated path (192
>>> characters) exceeds the OS limit of 255 characters per filename.
>>> Does the bjam generated path really have to be this long? Can I shorten it somehow?
>> You can pass --abbreviate-paths to bjam
> Probably I should just go ahead and implement MD5 paths.
> - Volodya

Is there a way to get boost build to generate the same paths when
using either an msvc-compiled bjam or a cygwin compiled-bjam? Right
now, if I understand correctly, if I invoke bjam with:

    some_path/bin.cygwinx86/bjam.exe threadapi=posix target-os=cygwin gcc

target-os-cygwin doesn't show up in the generated path. But if I invoke:

    some_path/bin.ntx86/bjam.exe threadapi=posix target-os=cygwin gcc

the generated path will include


I would like to force the same path (or hash) to be used. As far as I
know, this is not possible today. It would be nice if hashes were
implemented to contain all features used in the build, since the 255
character ceiling should no longer be a problem. Then it would be
possible to share the directory used for built artifacts, regardless
of how the build tool was compiled.

 - Mat

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