Re: [Plplot-devel] D language support topic (success for test_d on Darwin!)

[Alan W. I. <Ala...@gm...>]

On 2019-09-24 17:24-0700 Alan W. Irwin wrote:

> But the other issue (where our various thread library needs are met by
> the -pthread *compiler* option used for linking which neither dmd nor
> ldc2 understands) has proved much more difficult to solve (even though it
> is extremely easy to solve the issue by hand) *within the current
> constraints imposed by CMake*.

See <https://gitlab.kitware.com/cmake/cmake/issues/19757> for a CMake
feature request that would elegantly solve this issue.  But meanwhile,
I have implemented (commit ab8a90546 git-described as
plplot-5.15.0-44-gab8a90546) for the test_d project a workaround for
the current lack of am implementation for the 19757 feature
request. That workaround gives good results for dmd and ldc2 for an
updated test_d project and gdc (which does not require the workaround)
continues to work well for that updated test_d where (as in the plplot
project case) the test_d C library is linked with the -pthread option.
So this commit is a considerable step forward for test_d and
implements a workaround for the above issue that should also work
(once I implement it) for the plplot project case.

@Takeshi: would you please test the (updated) test_d project on your
Mac OS platform following what the (updated) cmake/test_d/README file
says?  Note, that file tells you how to build an extremely specific
version of dmd that has the -Xcc capability that my current D language
support for dmd needs.  This variant of dmd is being considered for
the next release of dmd, and likely the dmd developers will favor it
for inclusion the more platforms we use to test it (see the latter
part of the discussion at <https://github.com/dlang/dmd/pull/10438>
and also the on-going discussion at
<https://github.com/dlang/dmd/pull/10441>).  So we are right at the
"cutting edge" of dmd development now with a lot of care required to
build the dmd versions that we need, but in a year from now I am
hoping that the -Xcc dmd capability is just part of mainstream dmd
versions that are being released with no special version of dmd being
required for our D language support.

More later as I transfer from the test_d project to the plplot project
what I have learned about a solution to the above -pthread issue.

Alan
__________________________
Alan W. Irwin

Programming affiliations with the FreeEOS equation-of-state
implementation for stellar interiors (freeeos.sf.net); the Time
Ephemerides project (timeephem.sf.net); PLplot scientific plotting
software package (plplot.org); the libLASi project
(unifont.org/lasi); the Loads of Linux Links project (loll.sf.net);
and the Linux Brochure Project (lbproject.sf.net).
__________________________

Linux-powered Science
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