Hi again, I see this bug is not yet closed. Very well.
While the original problem had disappeared in late gcc4.1 series and not come back, the “-fwhole-program --combine” option combination is broken in early gcc4.4 series again. Luckily, the mksh-38.1-1 in the sid archive did not yet suffer from it (probably because it seems to have been built with gcc4.3), but the problem appeared in Ubuntu. https://bugs.launchpad.net/ubuntu/+source/gcc-4.4/+bug/352475 The interesting thing is that it’s very hard to get a reduced testcase, but I did manage to reproduce it with preprocessed versions of the original source and much less CFLAGS (-O2 seems to be instrumental, -std=gnu99 is sometimes needed to exhibit the problem too). @doko: maybe one should suggest to the gcc developers that they run “sh /path/to/mksh/Build.sh -r -combine” every once in a while to check if similar bugs pop up again? FWIW, the gcc-snapshot packages in both Debian sid and Ubuntu are free of that bug, but I think they’re from what will become gcc4.5 and I don't know about gcc 4.4.1. Right while writing this, it comes to my attention that gcc4.4 on Fedora 11 seems to pass compiling mksh with -combine too. │gcc-Version 4.4.0 20090427 (Red Hat 4.4.0-3) (GCC) I don’t know how much patched that one is. Maybe someone will pick this up? While I do not use gcc4 on MirBSD, I think whole-programme optimisations are interesting and GNU/Linux users may benefit from it. (I also do appreciate the testing with a *lot* of compilers – if the bugs I discover in the compilers are fixed then ☺) bye, //mirabilos -- In traditional syntax ' is ignored, but in c99 everything between two ' is handled as character constant. Therefore you cannot use ' in a preproces- sing file in c99 mode. -- Ragge No faith left in ISO C99, undefined behaviour, and C compiler authors. -- To UNSUBSCRIBE, email to debian-gcc-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
