Hi Andrew:

Thanks very much for all your Linux GCC visibility fixups this morning.
As of revision 8761, I get a completely clean build of a fully configured
plplot.  To be specific my cmake options for this full configuration were
my usual ones, i.e.,

-DCMAKE_INSTALL_PREFIX=$prefix and
-DBUILD_TEST=ON -DPLD_wxwidgets=ON -DHAVE_PTHREAD=ON -DENABLE_pdl=ON
-DHAVE_ADA_2007=ON

So basically I add wxwidgets and perl/pdl to the usual default mix of
large numbers of device drivers and bindings.

Here are the complete ctest results for the

export CC='gcc -fvisibility=hidden'

case.

   1/ 16 Testing examples_c                       Passed
   2/ 16 Testing examples_cxx                     Passed
   3/ 16 Testing examples_f77                     Passed
   4/ 16 Testing examples_f95                     Passed
   5/ 16 Testing examples_octave                  Passed
   6/ 16 Testing examples_python                  Passed
   7/ 16 Testing examples_tcl                     Passed
   8/ 16 Testing examples_perl                 ***Failed
   9/ 16 Testing examples_ada                     Passed
  10/ 16 Testing examples_ocaml                   Passed
  11/ 16 Testing examples_psttfc               ***Failed
  12/ 16 Testing examples_png                     Passed
  13/ 16 Testing examples_svg                     Passed
  14/ 16 Testing examples_pscairo              ***Failed
  15/ 16 Testing examples_pngcairo             ***Failed
  16/ 16 Testing examples_compare              ***Failed

I checked and perl/pdl has no visibility issues for examples 1 through 19.
That error continues to caused by pdl not covering our full API for example
20.  The errors for psttfc, pscairo, and pngcairo were all segfaults in
example 1 (and presumably the other examples as well if ctest had gotten
to them).  Those segfaults disappear and in fact psttfc, pscairo, and pngcairo
change from "Failed" to "Passed" (i.e., all examples ran without problems)
if I clear CC using

CC=

before a clean build.

So it appears there are still some visibility issues left for the psttf and
cairo device drivers.  Nevertheless, the above is an amazing improvement
over what I had last night, and many thanks for figuring out what to do to
make this possible.

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); 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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