On 2010-07-12 10:56-0600 Orion Poplawski wrote: > On 07/08/2010 06:43 PM, Jerry wrote: >> >> On Jul 8, 2010, at 9:37 AM, Orion Poplawski wrote: >> >>> gcc 4.5 just landed in Fedora rawhide. Now getting the following >>> error >>> building Ada examples. Looks like we may need to add -llapack to >>> the link, >>> but not sure where this should be done. >> >> GNAT (GNU Ada Translator) 2005 and 2012 require LAPACK and BLAS >> libraries to implement certain numeric functionality. I'm not sure >> where in the gcc series this entered but I think it was 4.3. In the >> Ada Reference Manual this functionality is described in Annex G.3. >> >> You might have both C and Fortran versions of these libraries--OS X >> does. Ada can handle either (in principle) and I don't think it >> matters which one is used. I don't know which is currently being >> linked on OS X without looking into it. (Actually, I think OS X puts >> them both into the same framework which could mean in the same library.) >> >> There is a build flag in PLplot to indicate the presence or absence of >> Ada 2005 (versus Ada 95) but we should probably move towards using it >> when possible as this compiler becomes more widespread. >> >> In PLplot, there is minimal usage of this functionality--only some >> type declarations for arrays of floating point numbers. If the flag >> for Ada 2005 is not set, cmake causes these declarations to be made in >> the bindings themselves. So if you don't want to link the libraries, >> you should be able to proceed with PLplot by adjusting the flag. > > It seems to me then that if I specify Ada 2005(7), the plplot build system > should add lapack and blas to the appropriate link command.
The current situation is more primitive than that (see ada.cmake). If you specify HAVE_ADA_2007, then our Ada interface takes advantage of certain limited Ada 2005 capabilities, but there is no check that the Ada compiler has such capabilities, and that option certainly has nothing directly to do with whether the Ada compiler requires lapack/blas or not. Ideally, what we would like to do is an Ada version check to see whether the current version is greater than or equal to the first version (4.5?) where lapack/blas need to be linked in and the first version (4.0?) which has the limited Ada 2005 capabilities required by HAVE_ADA_2007. Once we have those version checks implemented, no intervention by the user will be required, and we can simply do the right thing (link in lapack/blas when needed, and set HAVE_ADA_2007 when possible). I am willing to add those version checks with 4.5 and 4.0 tentatively used for the two separate version limits, but, Jerry, can you get me more refined numbers for those limits (especially the last one which is just a crude guess on my part at this time)? 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 Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first _______________________________________________ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
