Re: [jamboost] Re: Patch for tools/gcc.jam in BBv2

From: Vladimir Prus (ghost_at_[hidden])
Date: 2005-05-03 09:42:15

On Friday 29 April 2005 16:34, David Abrahams wrote:
> Vladimir Prus <ghost_at_[hidden]> writes:
> > On Thursday 28 April 2005 19:46, David Abrahams wrote:
> >> > This file was just copied to the gcc.jam file in v2.
> >> >
> >> > I don't know what the motivation was for that change, nor why
> >> > it breaks mingw now.
> >>
> >> The motivation is that cmd.exe has a much more restricted command-line
> >> length than the method that is used when JAMSHELL=%, and we were
> >> violating that length when building static libraries. Since GCC
> >> doesn't support response (.rsp) files, we needed a workaround.
> >
> > Why JAMSHELL=% is not global default, then?
>
> Probably because A) I wanted to disturb the normal operation of jam as
> little as possible and B) No shell variable expansion, pipes, or &&/||
> work when JAMSHELL=%.

Ah, so global JAMSHELL=% will break testing.jam, and whatnot. Understood.
Can you copy-paste your explanation above to gcc.jam, to avoid questions in 
future?

- Volodya

-- 
Vladimir Prus
http://vladimir_prus.blogspot.com
Boost.Build V2: http://boost.org/boost-build2