------- Comment #3 from wielemak at science dot uva dot nl 2006-03-02 09:24 ------- Andrew,
If you think this is a real and still present bug I could try to add a little main() to the file and turn the file into a stand-alone program. I guess it is pretty likely it depends on nasty details in the structure definitions and it will be a lot of work to cut down the headers and still be able to compile the program and reproduce the bug. If you simply want to reproduce, fetch pl-5.6.6.tar.gz from http://gollem.science.uva.nl/cgi-bin/nph-download/SWI-Prolog/pl-5.6.6.tar.gz Unpack, goto pl-5.6.6/src, type ./configure, add -g to COFLAGS in Makefile, make (few warnings, these are fixed already but do not affect this problem), abort Prolog which will be crashing in a loop using ^\. Now gdb pl (gdb) break initPrologThreads (gdb) run (gdb) finish (gdb) print *info And you see the problem. The nasty thing is that if you add a print-statement reading the info->pl_tid, it is compiled correctly. It gives the impression that somehow gcc thinks the value is never used and it thus can ignore the assignment. As the structure is in global memory (part of the threads[] array) and it *is* used, this is of course completely wrong. Cheers --- Jan -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26511
