On 2013-10-11 16:16-0700 Alan W. Irwin wrote:
I did try the obvious step of building the Debian packages for libhpdf
using "apt-src build libhpdf". All seemed well with that build, but
when I installed the corresponding debs, none of the critical symbols
for the library as revealed by
objdump --dynamic-syms /usr/lib/libhpdf.so
were available, and as a result all PLplot tests with the
corresponding plot device failed. Is there something special
I have to do to get "apt-src build" to work for this package?
For this reason, I was unable to test the attached patch for the
Debian source of version 2.2.1 of this library, but I am virtually
positive this patch will work because it is only a two-line patch that
does apply cleanly to 2.2.1.
I have now figured out the source of these unexpected objdump results.
Those were an artifact of having
CFLAGS=-O3 -fvisibility=hidden
defined as an environment variable for the PLplot build I was
doing at the same time. Sorry this issue obscured the simple
issue which I now repeat for clarity.
The patch I attached to the original report applies cleanly to the
Debian version of the libharu (a.k.a., libhpdf) source code, the
apt-src build of that patched result proceeds cleanly, and when the
resulting debs are installed, they produce
-rw-r--r-- 1 root root 747408 Oct 16 21:23 /usr/lib/libhpdf-2.2.1.so
lrwxrwxrwx 1 root root 16 Oct 16 21:23 /usr/lib/libhpdf.so ->
libhpdf-2.2.1.so
The PLplot build of our pdf device against the above patched library
proceeds without issues as does all our tests of that device (which is
linked with the above device). In particular the segfault that
appeared for our example 24 in the unpatched case is now gone, and
valgrind shows no memory management errors for that example now.
Therefore, please apply this patch when you create debs for libhpdf
from now on.
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
__________________________
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