[petsc-dev] (no subject)

[Matthew Knepley]

We decided a long time ago that using the compiler as the linker was
necessary to
assure that compiler libraries were picked up. I was asked to remove those
options
to cut down on people screwing themselves. Do we need another linker?

Our conceptual model is currently:

  compiler/linker which should generate things that run unless we are in
batch mode

  archiver

  shared linker

  dynamic linker

  Matt

On Thu, Jun 17, 2010 at 5:08 PM, Barry Smith <bsmith at mcs.anl.gov> wrote:

>
>  Matt,
>
>    It is a good thing you don't come to the new building at the lab,
> because I would throw you off the top balcony down to the stones. Then I
> would haul your carcass back up seven flights of stairs and throw you down a
> second time.
>
>   BuildSystem seems to assume that the C compiler (and also c++ compiler)
> are ALWAYS also used as the C and C++ linker and there is no way to set a
> different linker and no way to even figure out how one can set a different
> linker. Why are the LD arguments commented out and never used?
>
>   Barry
>
>
>
>  help.addArgument('Compilers', '-CFLAGS=<string>',       nargs.Arg(None,
> '',   'Specify the C compiler options'))
>    help.addArgument('Compilers', '-CXX=<prog>',            nargs.Arg(None,
> None, 'Specify the C++ compiler'))
>    help.addArgument('Compilers', '-CXXFLAGS=<string>',     nargs.Arg(None,
> '',   'Specify the C++ compiler options'))
>    help.addArgument('Compilers', '-CXX_CXXFLAGS=<string>', nargs.Arg(None,
> '',   'Specify the C++ compiler-only options'))
>    help.addArgument('Compilers', '-CXXCPPFLAGS=<string>',  nargs.Arg(None,
> '',   'Specify the C++ preprocessor options'))
>    help.addArgument('Compilers', '-FC=<prog>',             nargs.Arg(None,
> None, 'Specify the Fortran compiler'))
>    help.addArgument('Compilers', '-FFLAGS=<string>',       nargs.Arg(None,
> '',   'Specify the Fortran compiler options'))
>
> ##    help.addArgument('Compilers', '-LD=<prog>',
>  nargs.Arg(None, None, 'Specify the executable linker'))
> ##    help.addArgument('Compilers', '-CC_LD=<prog>',
> nargs.Arg(None, None, 'Specify the linker for C only'))
> ##    help.addArgument('Compilers', '-CXX_LD=<prog>',
>  nargs.Arg(None, None, 'Specify the linker for C++ only'))
> ##    help.addArgument('Compilers', '-FC_LD=<prog>',
> nargs.Arg(None, None, 'Specify the linker for Fortran only'))
>    help.addArgument('Compilers', '-LD_SHARED=<prog>',       nargs.Arg(None,
> None, 'Specify the shared linker'))
>
>


-- 
What most experimenters take for granted before they begin their experiments
is infinitely more interesting than any results to which their experiments
lead.
-- Norbert Wiener
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