From: Juergen Hunold (juergen.hunold_at_[hidden])
Date: 2008-02-15 14:19:52
Hi Rene !
On Friday 15 February 2008, Rene Rivera wrote:
> Juergen Hunold wrote:
> > I've been bitten by issue #83 again
> > https://zigzag.cs.msu.su:7813/boost.build/ticket/83
> > and decided to get a go and revive the last try recorded in
> > http://svn.boost.org/trac/boost/changeset/34062
> Since I'm terrible at reading those diffs without the extra work, and
> reading the ticket did illuminate either... Could you explain *what*
> and *how* this fixes.
Well, I just dug out this two-year old patch ;-)
Okay, I'll try to explain the idea I figured out from the ticket and the
Assume you got a Jamfile containing:
exe a : dir1/a.cpp dir2/a.cpp ;
The current Boost.Build would complain about colliding targets "a.o"
because the build/generators.jam would simply do (at line 410...)
- # Names of sources might include directory. We should strip it.
- name = $(name:D=) ;
and produce identical target names.
I've refactored the old patch to a new routine
rule determine-target-name ( fullname : prefix ? postfix ? )
which will produce two targets
and add those two without clash.
So we get two object files
and all's well ;-))
Well, the old patch did this, but forgot to consider filename prefixes.
Let's take the Qt4-toolset for example. The "moc" toolset will convert
a.h -> moc_a.cpp and compile this to the final target moc_a.o
The patch from rev.34062 produced
dir1/a.h -> moc_dir1/a.h -> moc_dir1/a.o
which is not clearly not the intended result. I've modified the code to
add the prefix at the right place and get
dir1/a.h -> dir1/moc_a.h -> dir1/moc_a.o
which is what most Qt-related tools would expect...
> And since I've fixed this outside BBv2 in my
> own projects, which I'm posted code to that effect here before... How
> your solution differs to mine of renaming the produced object files?
Well, it seems that I somehow missed your code. This is very unfortunate
Could you please post a pointer again, so I can investigate your
The first try was done during the infamous v1->v2 translation period and
reverted because no one had the time (and nerves :-(( ) to get this
thing right then. I thought this would be a better occasion to get
_some_ fix into the code base right after 1.35 is out and before 1.36
I've got no internet access over the weekend, so no hurry ;-))
-- * Dipl.-Math. Jürgen Hunold ! Ingenieurgesellschaft für * voice: ++49 511 262926 57 ! Verkehrs- und Eisenbahnwesen mbH * fax : ++49 511 262926 99 ! Lister Straße 15 * juergen.hunold_at_[hidden] ! www.ivembh.de * * Geschäftsführer: ! Sitz des Unternehmens: Hannover * Prof. Dr.-Ing. Thomas Siefer ! Amtsgericht Hannover, HRB 56965 * PD Dr.-Ing. Alfons Radtke !
Boost-Build list run by bdawes at acm.org, david.abrahams at rcn.com, gregod at cs.rpi.edu, cpdaniel at pacbell.net, john at johnmaddock.co.uk