Apologies in advance for not being able to create a small code sample.
The code is in SourceForge GIT repository for treedb.
To build treedb you will need v3c - the GIT version.
First download v3c and "make prefix=[install-location] && [sudo] make install".
cd [treedb-dir]
"make debug check" works but "make git branch=master check" fails - hangs.
The release build ("make release") is definately incorrect.
The code has some hacks for strict aliasing but contrary to the documentation,
these aren't caught with "-fstrict-aliasing -Wstrict-aliasing".
The makefile I used to build gcc and it's required libraries follows.
all:
cd build/gmp && ../../gmp-4.3.2/configure --prefix=/opt/gcc
--enable-cxx && \
make && sudo make install
cd build/mpfr && ../../mpfr-3.0.0/configure --prefix=/opt/gcc
--with-gmp=/opt/gcc && \
make && sudo make install
cd build/mpc && ../../mpc-0.8.2/configure --prefix=/opt/gcc
--with-mpfr=/opt/gcc && \
make && sudo make install
cd build/ppl && ../../ppl-0.10.2/configure --prefix=/opt/gcc
--with-libgmp-prefix=/opt/gcc --with-libgmpxx-prefix=/opt/gcc --enable-cxx
--no-create --no-recursion && \
make && sudo make install
cd build/cloog-ppl && ../../cloog-ppl-0.15.9/configure
--with-ppl=/opt/gcc --with-gmp=/opt/gcc --prefix=/opt/gcc && \
make && sudo make install
cd build/gcc-4.5.1 && ../../gcc-4.5.1/configure -v
--with-pkgversion="Philip Ashmore's build 4.5.1-1"
--with-bugurl=file:///opt/gcc/share/doc/gcc-4.5/README.Bugs
--enable-languages=c,c++ --prefix=/opt/gcc --enable-shared
--enable-linker-build-id --with-system-zlib --libexecdir=/opt/gcc/lib
--without-included-gettext --enable-threads=posix
--with-gxx-include-dir=/opt/gcc/include/c++/4.5 --program-suffix=-4.5
--enable-nls --enable-clocale=gnu --enable-libstdcxx-debug --with-arch-32=i586
--with-tune=core2 --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu --with-mpc=/opt/gcc
--with-mpfr=/opt/gcc --with-gmp=/opt/gcc --with-ppl=/opt/gcc
--with-cloog=/opt/gcc && \
make && sudo make install
--
Summary: gcc generates incorrect code
Product: gcc
Version: 4.5.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: contact at philipashmore dot com
GCC build triplet: x86_64-linux-gnu
GCC host triplet: x86_64-linux-gnu
GCC target triplet: x86_64-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45204
