[CMake] How to set _default_ timeout for the ctest command?

[Alan W. Irwin]

For the lapack CMake-based build and test system, some of the ctests
can exceed 1500 seconds (the default limit) for special conditions
(e.g, a quadruple-precision build of lapack that can be very slow). 
To reduce such issues without forcing users to use the ctest --timeout
<excessive number> option, the lapack developers would like to
increase the default limit substantially above 1500 seconds.  Does
anyone here know how to do that?

I guessed that setting CTEST_TEST_TIMEOUT might do that, but when I
experimentally set that to a small number (actually 1) (just before
the first add_test command of another project I am completely familiar
with (PLplot, natch)) the ctests that ran beyond that one second limit
did not error out (i.e., I presume they were still using the 1500
second default).  Note, the ctests I am referring to are simply run
using the ctest command from the command line and are not submitted to
a dashboard server.

I presume another way to do it would be to set the TIMEOUT test property
for every ctest, but that constitutes a maintanence issue, i.e., it
is a pretty clumsy way to do it.

So any ideas for setting the default timeout (either higher or lower
than 1500) for ctests would be welcome.

Alan
__________________________
Alan W. Irwin

Astronomical research affiliation with Department of Physics and Astronomy,
University of Victoria (astrowww.phys.uvic.ca).

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.sf.net); 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
__________________________