On Thu, Mar 13, 2008 at 12:53 AM, Jonathan Woithe <[EMAIL PROTECTED]> wrote: > > On Wed, Mar 12, 2008 at 11:12 PM, Jonathan Woithe > > <[EMAIL PROTECTED]> wrote: > > > I agree. What about running ldd on <prefix>/lib/plplot-*/cairo.so? > > > Anything differences in this between the two working directories? > > > > > > The drivers are loaded dynamically on demand I think which is why the > cairo > > > libraries (for example) aren't explicitly required by the test > application. > > > > This looks like it may be the culprit, though I don't know why. > > > > from the segfaulting location: > > ~/Projects/ocaml/tmp$ ldd > ~/Applications/plplot/lib/plplot5.9.0/driversd/cairo.so > > > libplplotd.so.9 => /usr/lib/libplplotd.so.9 (0xb7f16000) > > > libcsirocsa.so.0 => ~/Applications/plplot/lib/libcsirocsa.so.0 > > (0xb7e6d000) > > libcsironn.so.0 => ~/Applications/plplot/lib/libcsironn.so.0 > (0xb7e65000) > > > > > from the build directory (no segfaults): > > ~/tmp/BUILD/plplot/plplot-svn/build/drivers$ ldd cairo.so > > > libplplotd.so.9 => > > ~/tmp/BUILD/plplot/plplot-svn/build/src/libplplotd.so.9 (0xb7eda000) > > > libcsirocsa.so.0 => > > ~/tmp/BUILD/plplot/plplot-svn/build/lib/csa/libcsirocsa.so.0 (0xb7bd7000) > > libcsironn.so.0 => > ~/tmp/BUILD/plplot/plplot-svn/build/lib/nn/libcsironn.so.0 (0xb7bcf000) > > > > > ~/Applications/plplot/* is my plplot-svn install, while /usr/lib/* > > holds the Debian packages. > > How do you normally switch between these two plplot environments? Do you > use LD_LIBRARY_PATH? If so, was it active for any of the above tests?
LD_LIBRARY_PATH was set in both cases to $HOME/Applications/plplot/lib > What command line did you use to compile the test application? The test was in OCaml, one was in octave. I don't know if it will help much, but the compilation command was: ocamlfind ocamlopt -package plplot -linkpkg -o plot.native plot.ml I checked the relevant files for the OCaml -> C PLplot interface and they all point (according to ldd) to the ~/Applications/plplot/lib/ files. > I guess I'm curious to know how the compiler knows which of these to use > when compiling and linking your test application. There is also the small > matter of how your test application seemingly correctly picks > libplplotd.so.9 from ~/Applications/plplot/lib/ in both cases - this puzzles > me a bit. pkg-config is used to find the appropriate compilation flags. For compiling the OCaml PLplot interface I use pkg-config, with PKG_CONFIG_PATH=$HOME/Applications/plplot/lib/pkgconfig:$PKG_CONFIG_PATH. A test of pkg-config --libs plplotd gives the expected results, pointing to the files under ~. > In the above, the libplplotd.so.9 is found in the build directory in the > second test because the uninstalled cairo.so probably has a hardcoded path > to it; this might be done to assist in debugging as it allows one to run > things from the build directory without installing. > > The situation in the first test is a concern since the wrong libplplot.so > is found. What's not clear is why, given that the ~/Applications/ version > is located by the test application. This seems to be confirmed by Alan's reply. > > Is there a way to make LD_LIBRARY_PATH or similar hold for the dynamically > > loaded cairo.so? > > In theory at least LD_LIBRARY_PATH should be consulted when loading cairo.so > unless the underlying application is a setuid or setgid binary. Refer to > the dlopen() manpage for details. > > I've just checked the plplot source code. The call to dlopen() uses a path > to the driver which is returned by plGetDrvDir() in plcore.c. If you are > anywhere in the build tree then the directory is forced to refer to the > driver's directory in the build tree. If not, it tries to find the driver > in the following places: > > * The directory specified by the PLPLOT_DRV_DIR environment variable > * The ultimate install location of the drivers > > This explains how the driver itself is found. Resolving the driver's > dependencies should occur as previously explained. > > I suspect there might be some issue going on between the different versions > of plplot on your system. It would be nice to pinpoint the exact cause. > > Regards > jonathan > Any suggestions on how to further track this down? If I have left out anything that can help please let me know. If I remove the installed plplot-svn from ~/Applications/plplot/ and unset PKG_CONFIG_PATH and LD_LIBRARY_PATH, I still get the segmentation fault building everything against the Debian Sid PLplot packages. Hez -- Hezekiah M. Carty Graduate Research Assistant University of Maryland Department of Atmospheric and Oceanic Science ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
