I've been testing the gm2 development branch (based on gcc-12)
against lto and non lto builds.
git clone git://gcc.gnu.org/git/gcc.git gcc-git
cd gcc-git
git checkout devel/modula-2
I'm using the configure options:
CXXFLAGS="-g" CFLAGS="-g $PROFILE" ${absdir}/configure \
--prefix=$HOME/${INSTALLDIR} \
--libexecdir=$HOME/${INSTALLDIR}/lib \
--enable-threads=posix \
--enable-clocale=gnu --enable-languages=${LANGUAGES} \
--disable-multilib --enable-checking \
--enable-long-longx \
--enable-bootstrap
and building using: make -j 12.
Without lto the repro above (from Dec 9th) passes all gm2 regressions
on the amd64 architecture and does not introduce any regression tests
for the languages (c,c++,go,fortran).
With lto there are no extra errors introduced compared between other
languages. However I do see many large set regression test failures
in gm2 when lto is enabled. I'm using the configure arguments:
CXXFLAGS="-g" CFLAGS="-g $PROFILE" ${absdir}/configure \
--prefix=$HOME/${INSTALLDIR} \
--libexecdir=$HOME/${INSTALLDIR}/lib \
--enable-threads=posix \
--enable-clocale=gnu --enable-languages=${LANGUAGES} \
--disable-multilib --enable-checking \
--enable-long-longx \
--enable-bootstrap \
--with-build-config=bootstrap-lto-lean
and building with
make -j 12 profiledbootstrap-lean
The good news is that I can test and hunt for the large set failures
(diff the execution of the cc1gm2 built with/without lto) and also good
that gm2 builds with lto. [Interestingly there has been a problem with
large sets and sparc64 and a 64 bit powerppc variant - so hopefully this
could all be the same bug.. maybe]. From some time ago I have a python
script which will run two copies of gdb/cc1gm2 and single step both in
lock step and dump out when they differ.
Aside from the bug(s) above it is looking pretty stable - and was
wondering when or if it would be a good time to merge gm2 into the
trunk?
In the meantime I'll hunt the gm2/lto bug above and keep git merging
(approx weekly) and feed in small patches to the gm2 development
branch,
regards,
Gaius
