Hi, i'd like to submit a bug report. I read the instructions on http://gcc.gnu.org/bugs, but i do not really know where the crash happens and what causes the crash to happen. I therefore just wrote the instructions below - they're simple. If you still need more specific stuff, please send me a private message and help me a little bit...
I have a library which uses automake/autoconf; it does not have dependencies. If i build the non-debug version, files are compiled with -O3. Then the library causes a segfault. If i compile with -O2, everything works. Actually it's enough if i compile 2 files with -O2, all others with -O3, and everything's fine. If i run the program under valgrind, it runs without failure. gdb shows that a pointer is bogus. My system is a 64bit Ubuntu 9.04 linux, but i also saw it on other 64bit distributions (but it works fine on 32bit). uname -a says: Linux wintermute 2.6.31-17-generic #54-Ubuntu SMP Thu Dec 10 17:01:44 UTC 2009 x86_64 GNU/Linux My gcc is Using built-in specs. Target: x86_64-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Ubuntu 4.4.1-4ubuntu8' --with-bugurl=file:///usr/share/doc/gcc-4.4/README.Bugs --enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --enable-shared --enable-multiarch --enable-linker-build-id --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.4 --program-suffix=-4.4 --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug --enable-objc-gc --disable-werror --with-arch-32=i486 --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu Thread model: posix gcc version 4.4.1 (Ubuntu 4.4.1-4ubuntu8) I did some tests with the following versions (again, only x86_64. x86 works fine): 4.1.3 20080704 (prerelease) (Debian 4.1.2-27) - works 4.3.4 (Debian 4.3.4-6) - works 4.4.1 on Gentoo - fails 4.4.3 20100108 (prerelease) (Ubuntu 4.4.2-9ubuntu3) - fails To reproduce, these steps are necessary: wget http://crupp.de/dl/hamsterdb-1.1.1.tar.gz tar -zxvf hamsterdb-1.1.1.tar.gz cd hamsterdb-1.1.1 ./configure --enable-internal make make test # this will segfault after a few tests Now change the CFLAGS to -O2 in src/Makefile, and rebuild the two files which depend on freelist.c cd src vi Makefile # -O3 -> -O2 touch freelist.c make # will build two files - freelist.c and freelist_v2.c cd ../unittests make ./test # this will run Best regards Christoph
