Re[2]: [Gc] Should libatomic_ops be inside bdwgc?

Ivan Maidanski ivmai at
Mon Aug 15 01:48:29 PDT 2011

Hi Petter,

I've committed your changes to libatomic_ops (with minor additions to .gitingore).

About make maintainer-clean: it does not clean /m4 contents. Is it expected?


14 08 2011, 15:34 Petter Urkedal <urkedal at>:
> On 2011-08-12, Petter Urkedal wrote:
> > On 2011-08-12, Ivan Maidanski wrote:
> > > Now I have another issue with make distcheck (I have libatomic_ops folder inside bdwgc):
> > > configure: error: libatomic_ops is required.  You can either install it on your system, or fetch and unpack a resent version into the source directory and link or rename it to libatomic_ops.
> >
> > The issue is that distcheck needs everything to be automated, so I think
> > the option of unpacking libatomic_ops in the source directory has to be
> > secondary.  We'll need to use a pre-installed one ourselves.  To test
> > that the other option worked, I passed --without-libatomic-ops and used
> > the regular build target.
> I realized that I'm probably working a bit different from you.  When I
> have several dependent libraries which I work with at the same time, I
> use a feature of pkg-config (and libtool) which allows linking in one
> library from the build-directory of the other.  I've done the necessary
> changes to libatomic_ops and bdwgc and will send you pull requests so
> you can have a look.  This works by setting
> PKG_CONFIG_PATH=path-to-libatomic_ops-build-dir/pkgconfig (it's
> colon-separated if you have several).  pkg-config will then pick up the
> "-uninstalled.pc" version if present.
> The different modes of the somewhat bloated libatomic_ops detection in
> bdwgc can be tested as follows assuming PKG_CONFIG_PATH is set:
>   * Configure and build libatomic_ops, then configure and distcheck
>     bdwgc.
>   * Issue "make install; make maintainer-clean" in libatomic_ops.
>     Now, bdwgc should pick up the installed version and one can do
>     distcheck again.  Issue uninstall in libatomic_ops afterwards.
>   * After an uninstall and maitainer-clean in libatomic_ops, one can try
>     to link the directory under bdwgc, and run check.  As mentioned
>     distcheck won't work.  Remove the link and build libatomic_ops again
>     to get back to "normal".
> I should mention that the whole "Atomic Ops" section in
> bdwgc/ can be reduced to one line,
> if we skip support extracting/linking libatomic_ops in the source dir.
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