On 01/28/2013 07:54 PM, Alan W. Irwin wrote: > On 2013-01-28 17:01-0700 Orion Poplawski wrote: > >> Fedora rawhide has moved to gcc 3.8 and I'm seeing: >> >> $ ./x02a -dev psc -o x02a.psc >> >> raised CONSTRAINT_ERROR : x02a.adb:138 overflow check failed >> >> I'm taking that this is due to some increased checking with ada in >> 3.8. Thoughts? > > Hi Orion: > > I am virtually positive you meant the gcc-4.8 development effort which > (as far as I can tell) has not had a single release yet. So I am > changing the subject line accordingly. But please confirm that is > what you meant. > > If you meant gcc-4.8, there is always the chance that the symptom you > are seeing is a general problem caused by some recently introduced > version incompatibilty between gcc and Ada that still needs to be > worked out, i.e., a compiler inconsistency issue that has nothing to > do with PLplot development. On the other hand, it might be a PLplot > Ada issue that has been detected by (presumably) better error checking > for the latest versions of gcc/Ada as you have suggested. To help > decide between those two possibilities, could you give more details? > > For example, if you use the make -k option (to keep going despite > errors) are you able to compile all the Ada examples other than the > second one? If the issue is confined to just one of our examples, then > it is much more likely a PLplot Ada issue with that example (or the > API tested with that example) as you have suggested.
Sorry, yes it is 4.8. Fedora is very tight with gcc development so we get things early - fun! The example compiles fine, it just doesn't run. Some others don't run either (see below). It looks very much like a floating point overflow condition is being triggered. With a debug statement it aborts at the start of the loop: i = 0 r1 = 3.00000000000000E-01 I suspect that: 138 r(i+16) := Integer((r1 * 255.001) - 0.499999999999999); Has too many digits to be properly expressed. The comments indicate that it is dealing with some rounding/truncating differences. I suspect that gcc in 4.8 traps these conditions by default. Others: raised CONSTRAINT_ERROR : x02a.adb:141 overflow check failed raised CONSTRAINT_ERROR : x03a.adb:92 overflow check failed raised CONSTRAINT_ERROR : plplot_thin.adb:179 overflow check failed raised CONSTRAINT_ERROR : x12a.adb:105 overflow check failed raised CONSTRAINT_ERROR : x13a.adb:73 overflow check failed raised CONSTRAINT_ERROR : x14a.adb:218 overflow check failed raised CONSTRAINT_ERROR : plplot_thin.adb:179 overflow check failed raised CONSTRAINT_ERROR : x18a.adb:156 overflow check failed raised CONSTRAINT_ERROR : x19a.adb:192 overflow check failed raised CONSTRAINT_ERROR : plplot_thin.adb:241 overflow check failed raised CONSTRAINT_ERROR : plplot_auxiliary.adb:40 overflow check failed raised CONSTRAINT_ERROR : xthick02a.adb:136 overflow check failed raised CONSTRAINT_ERROR : xthick03a.adb:92 overflow check failed raised CONSTRAINT_ERROR : xthick12a.adb:104 overflow check failed raised CONSTRAINT_ERROR : xthick13a.adb:73 overflow check failed raised CONSTRAINT_ERROR : xthick14a.adb:218 overflow check failed raised CONSTRAINT_ERROR : xthick18a.adb:155 overflow check failed raised CONSTRAINT_ERROR : xthick19a.adb:192 overflow check failed -- Orion Poplawski Technical Manager 303-415-9701 x222 NWRA/CoRA Division FAX: 303-415-9702 3380 Mitchell Lane or...@cora.nwra.com Boulder, CO 80301 http://www.cora.nwra.com ------------------------------------------------------------------------------ Master Visual Studio, SharePoint, SQL, ASP.NET, C# 2012, HTML5, CSS, MVC, Windows 8 Apps, JavaScript and much more. Keep your skills current with LearnDevNow - 3,200 step-by-step video tutorials by Microsoft MVPs and experts. ON SALE this month only -- learn more at: http://p.sf.net/sfu/learnnow-d2d _______________________________________________ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
