[Boost-build] Problems with -j option on Windows

Subject: [Boost-build] Problems with -j option on Windows
From: Kirit Sælensminde (kirit.saelensminde_at_[hidden])
Date: 2008-10-18 08:58:18

I'm seeing some odd behaviour building on Windows that I don't notice 
using Linux. Basically I set the -j option on bjam to 2 as I have 2 
processors and want faster builds. I get random errors with files being 
in use or builds not succeeding with other errors. If I re-run the build 
command then these clear up -- I can just keep redoing the same build 
command until it succeeds.

I don't *think* I'm doing anything too stupid.

Kirit

--
The build command that I use is:
     bjam -j2 debug --toolset=msvc
(I've built bjam from the Boost 1.36 tag in the Subversion repo and I'm 
using its Boost.Build files.)
My Jamroot looks like this:
     project
         :
             requirements
             <include>../Boost/install/include/boost-1_36/
             <include>../OpenSSL/install/include/
             <threading>multi
             <runtime-link>shared
             <exception-handling>on
             <asynch-exceptions>on
             <extern-c-nothrow>off
             <target-os>windows:<define>WIN32
             <target-os>windows:<define>_AFXDLL
             <target-os>windows:<define>UNICODE
             <target-os>windows:<define>_UNICODE
         :
             default-build debug
         :
             build-dir build.tmp
         ;
     build-project Cpp/fost-ftest/ ;
     build-project Cpp/fost-core-test/ ;
     build-project Cpp/fost-crypto-test/ ;
And one of the Jamfiles like this:
     lib fost-core
         :
             ../../../libs//dload
             ../../../libs//uuid
             ../../../Boost//boost-date_time-dll
             ../../../Boost//boost-thread-dll
             ../../../Boost//boost-regex-dll
             coerce.cpp
             dynlib.cpp
             exception.cpp
             json.cpp
             json-coerce.cpp
             json-parse.cpp
             json-unparse.cpp
             setting.cpp
             string.cpp
             string-utilities.cpp
             thread.cpp
             unicode.cpp
             variant.cpp
             variant-coerce.cpp
         :
             <include>../include
         :
         ;