Re: [Boost-users] boost.build : need help/bug specifying struct-alignment ?

From: Rene Rivera (grafik.list_at_[hidden])
Date: 2005-06-18 10:56:01

Seb Martel wrote:
> Seb Martel wrote:
> 
>>Hi,
>>
>>I am trying to build boost.threads 1.32 statically with struct alignment 
>>set to 1.
>>
>>I dug up from the documentation that this should do the trick:
>>
>>bjam -sTOOLS=vc-7_1 "-sBUILD=debug <struct-alignment>1" -a -d+2
>>
>>however, I don't see the alignment switch '/Zp1' on the command line  :
>>
>>
>>     "cl"  /Zm800 -nologo /EHsc -c  -DBOOST_THREAD_LIB_NAME=boost_thread 
>>-DBOOST_THREAD_BUILD_LIB=1  /Z7 /Od /Ob0 /EHsc /GR /MDd /Op  Zc:forScope 
>>/Zc:wchar_t  -I"..\..\..\bin\boost\libs\thread\build"  -I"C:\Program 
>>Files\Microsoft Visual Studio .NET 2003\VC7\include"  I"G:\boost_1_32_0" 
>> 
>>-Fo"..\..\..\bin\boost\libs\thread\build\libboost_thread.lib\vc-7_1\debug\threading-multi\tss.obj" 
>>-Tp"..\..\..\libs\thread\build\..\src\tss.cpp"
>>
>>Is there something I am missing ?
>>
>>-seb
> 
> 
> I am getting in the habit of answering to myself :

I would have answered earlier but I was on vacation :-)

> Here is a patch to msvc-tools.jam that implements support for
> feature struct-alignment, as documented in features.jam
> 
> http://boost.org/tools/build/v1/features.jam
> 
> G:\boost_1_32_0\tools\build\v1> diff orig.jam msvc-tools.jam
> 81a82,87
>  > flags msvc CFLAGS <struct-alignment>1 : /Zp1 ;
>  > flags msvc CFLAGS <struct-alignment>2 : /Zp2 ;
>  > flags msvc CFLAGS <struct-alignment>4 : /Zp4 ;
>  > flags msvc CFLAGS <struct-alignment>8 : /Zp8 ;
>  > flags msvc CFLAGS <struct-alignment>16 : /Zp16 ;
>  > flags msvc CFLAGS <struct-alignment>auto :  ;
>  >

I'll add that in, thanks.

> Is there a better way to do this ?

If by better you mean without modifying msvc-tools.jam. You could add 
the option generically:

   bjam -sTOOLS=vc-7_1 "-sBUILD=debug <cflags>/Zp1" -a -d+2

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