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Subject: Re: [Boost-build] [Boost][build] Bjam ordering source $(>) list
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2009-06-25 18:49:58


K. Noel Belcourt wrote:
> In jam/src/make1.c, make1list(), I find this comment
> * make1list() - turn a list of targets into a LIST, for $(<) and $(>).
> which seems like the place where I could ensure that sources for, say
> a link action $(>) are ordered so that objects occur before archives
> or shared libraries. Some background.
> We're bringing up support for linking Fortran programs and have
> discovered that when linking C programs, the objects in $(>) always
> precede the libraries, which is good since the main is often in an
> object file. This is an issue if, for example, your linker doesn't
> support start / end group and the library precedes the object
> containing main (you get linker errors).

I'm not quite sure that I follow. Libraries ought to be in a separate
variable from sources.

> In our case, it seems that our objects always precede any libraries
> when linking with C, but when linking with Fortran, we find the
> libraries precede the objects and, hence, we get linker errors.
> Back to make1list(). It seems like this is the place where the list
> of sources and targets for an action are turned into a list for $(<)
> and $(>). Does anyone know (1) if bjam intentionally sorts objects
> before libraries for $(>) and, if it does as it seems to, (2) where is
> to code in bjam that does this?

The order of the targets ought to be controlled by Boost.Build in for example.

In Christ,
Steven Watanabe

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