Werner, there is an important question for you below: On 2006-10-17 20:16+0200 Werner Smekal wrote:
> [...] cd /home/smekal/DevZone/plplot/buildcygwin/drivers && ./get-drv-info > hpgl > > /home/smekal/DevZone/plplot/buildcygwin/drivers/hpgl.rc > Could not open driver module hpgl > libltdl error: No such file or directory > > get-drv-info doesn't find hpgl even if i run the program with > ./get-drv-info hpgl.so First some background to explain this problem. On Linux here are the (different) results with hpgl and hpgl.so: [EMAIL PROTECTED]> ./get-drv-info hpgl hp7470:HP 7470 Plotter File (HPGL Cartridge, Small Plotter):0:hpgl:34:hp7470 hp7580:HP 7580 Plotter File (Large Plotter):0:hpgl:35:hp7580 lj_hpgl:HP Laserjet III, HPGL emulation mode:0:hpgl:36:lj_hpgl [EMAIL PROTECTED]> ./get-drv-info hpgl.so Could not read symbol plD_DEVICE_INFO_hpgl.so in driver module hpgl.so libltdl error: /home/software/autotools/install/lib/libltdl.so.3: undefined symbol: plD_DEVICE_INFO_hpgl.so Have a look at drivers/get-drv-info.c to see what is going on for these two cases. * In the first (hpgl) case, lt_dlopenext is called with "hpgl". According to the documentation of lt_dlopenext (see info libtool on any Linux distro) it first tries the filename hpgl, then hpgl.la, then hpgl.extension where _for Linux_ ".extension" is ".so" and therefore that try succeeds on Linux. I presume all tries are failing on Cygwin (explaining your error above) because ".extension" (as understood by libltdl on Cygwin is not ".so"). In other words, libltdl is too smart for what I have done in our CBS which is to always (regardless of platform) create the shared object with the .so extension. * In the second (hpgl.so) case it immediately finds the file, but then it looks for the symbol plD_DEVICE_INFO_hpgl.so rather than the correct plD_DEVICE_INFO_hpgl in that shared object and therefore fails with the above error message. Important question: do you get that same error message about undefined symbol on Cygwin for the hpgl.so case? If so, then in your case libltdl is finding and reading hpgl.so properly, and it should be straightforward to fix the symbol problem. Here is my proposed fix (assuming you are getting the undefined symbol error with hpgl.so rather than not being able to open that shared object at all). Note, the input to get-drv-info must continue to be free of specific suffixes so that the correct symbol will be found in the file. However, I suggest we change get-drv-info.c so that it first searches for the shared object with the ".so" suffix (what we create on all platforms for our CBS system). We can use lt_dlopen for that purpose rather than lt_dlopenext. If that fails it should fall back to the normal lt_dlopenext call without the .so suffix that is currently done. Thus,our ABS should be unaffected by the proposed fix. Once we get the fixed get-drv-info to work on Cygwin (and Linux), we also have to make parallel changes to plcore.c. 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 Yorick front-end to PLplot (yplot.sf.net); the Loads of Linux Links project (loll.sf.net); and the Linux Brochure Project (lbproject.sf.net). __________________________ Linux-powered Science __________________________ ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
