For my recent testing of the BUILD_SHARED_LIBS=ON/ENABLE_DYNDRIVERS=OFF case I noticed a peculiar stdout result for example 14 for f77 and f95 which was
Enter graphics output file name: Demo of multiple output streams via the psc driver. Running with the second stream as slave to the first. Notice the "Enter graphics output file name:" output is first rather than last as in the other examples. That message is output via the C library and is a result of the second plinit which occurs far after the fortran write statements that produce "Demo of multiple output stream..." etc., messages. The issue for this example is gfortran and the C library use independent buffers to buffer what they send to stdout, and the C library finished its output first under these circumstances. I suspect it is just by chance that we haven't seen this issue for the default BUILD_SHARED_LIBS=ON/ENABLE_DYNDRIVERS=ON case. A gfortran workaround for this issue is to export GFORTRAN_UNBUFFERED_PRECONNECTED=y before running the fortran examples. That confirms it has to do with the stdout buffering, but the above is not a general fix. I have committed (revision 9319) a general fix for this issue which involves "call flush(6)". I have checked in the appropriate documentation that the flush routine is available in fortran support libraries for the g77, gfortran, absoft, intel, and Portland group compilers so I think this fix should probably be okay on most if not all platforms. However, I don't know whether "call flush(6)" works for the native Windows fortran compiler so I hope those with access to that compiler will comment. 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: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword _______________________________________________ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
