On 2007-06-04 21:17-0400 Hazen Babcock wrote: > On Jun 3, 2007, at 7:30 PM, Alan W. Irwin wrote:
>> (1) the 'ldd -r cairo.so' test showed the >> following problems: >> >> undefined symbol: cairo_ps_surface_create (./cairo.so) >> undefined symbol: cairo_pdf_surface_create (./cairo.so) >> undefined symbol: cairo_svg_surface_create (./cairo.so) >> >> It's fairly urgent to solve these problems since it excludes any testing >> of >> the pscairo, pdfcairo, or svgcairo devices on Linux. > > Maybe this is because I have Cairo v1.2.6 and debian testing is v1.2.4? > According the cairo docs these functions have been in the library since 1.2. Actually, my platform is Ubuntu Dapper (released almost exactly a year ago) which has version 1.0.4 of the cairo library. So that explains the missing symbols for my platform. Note, _some_ Ubuntu Dapper platforms are going to be around for a long time since Canonical plans to support it for 3 years on the desktop (and 5 years on the server). However, I am not sure the majority of desktop users will actually use Ubuntu Dapper that long since even a one-year old Linux desktop is already way out of date thanks to the huge pace of change for Linux development. (A case in point is this already old libcairo version for Ubuntu Dapper). For example, I plan to move to Debian testing as soon as I can find the time to do the install. That's the best background I can give you about how relevant libcairo-1.0.4 will be in the future, and I will let you be the judge whether you want to support this older version of libcairo or not. I hope to install debian testing some time this summer after I finish my current research project, and after that old libcairo versions won't be an issue for me. > >> (2) ./x08c -dev xcairo shows only the first page of that example. > > Hm. On OS-X I get a bus error. It is interesting that it works fine if you > just type ./x08c and then choose the driver. ./x08c -dev xcairo now actually pretty much works for me. I finally figured out that you should hit CR in the xterm where that command-line is typed and not the GUI (at least when threading is not turned on). Now that I know how to run it, "./x08c -dev xcairo" shows some issues. (1) The 3D labelling needs work on the transformation to determine the rotation and slew of each letter. I thought there was now standard code in the plplot library for that? Or is it a bug in that standard code? (2) Memory management issues Here is the associated error message (after I hit one additional CR after the last page of example 8 is displayed) *** glibc detected *** double free or corruption (!prev): 0x08050358 *** Unless there is some internal problem in the Ubuntu Dapper libraries (this is possible since these are old versions of each library) it sounds like your code might be trying to free something that has already been freed. 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 __________________________ ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
