[Boost-build] Translating mpicxx output into command line args

Subject: [Boost-build] Translating mpicxx output into command line args
From: K. Noel Belcourt (kbelco_at_[hidden])
Date: 2009-11-27 14:20:10

Hi,

I've attached part of the bjam.log output from nightly trunk tests to  
demonstrate a problem with how the build system translates mpicxx - 
show output into Boost-build link line arguments.

[ output from mpicxx -show ]

<linkflags>-Wl,-rpath <linkflags>-Wl,/home/sntools/extras/mpi/ 
mpich-1.2.7p1-gcc-4.4.1-64Bit/lib <linkflags>-Wl,-rpath <linkflags>- 
Wl,/home/sntools/extras/compilers/gcc-4.4.1/lib64
<linkflags>-Wl,-rpath <linkflags>-Wl,/home/sntools/extras/compilers/ 
gcc-4.4.1/lib

The mpicxx output is not correctly translated into link line  
arguments by Boost-build.  Here you can see that the above mpicxx - 
show output is converted to these invalid link line arguments.

-Wl,-rpath -Wl,/home/sntools/extras/compilers/gcc-4.4.1/lib -Wl,/home/ 
sntools/extras/compilers/gcc-4.4.1/lib64 -Wl,/home/sntools/extras/mpi/ 
mpich-1.2.7p1-gcc-4.4.1-64Bit/lib

Notice the missing -Wl,-rpath before the second and third library  
paths (plus the secondary issue that the library search directories  
have been reordered).  A fair number of MPI tests fail because of  
this error.  Does anyone know of a clever way to fix this?

Thanks.

-- Noel