Regression: bootstrap failure of gcc-4.0-20041212 on OpenDarwin 7.2.1/x86 (i686-apple-darwin7.2.1)

[Lars Sonchocky-Helldorf <Lars dot Sonchocky-Helldorf at interone dot de>]

The system:
===========

uname -a
Darwin localhost 7.2.1 Darwin Kernel Version 7.2.1: Wed Jul 14 03:00:02 
PDT 2004; root:tmp/xnu-7.2.1-1-root.obj/RELEASE_I386  x86 i386

gcc -v
Reading specs from /usr/libexec/gcc/darwin/i386/3.3/specs
Thread model: posix
gcc version 3.3 20030304 (Apple Computer, Inc. build 1495)


Prerequisites:
==============

# link libmx to libSystem

# this is necessary because some libraries are missing 
# from OpenDarwin, in this case the -lmx argument results in:
# /usr/bin/ld: can't locate file for: -lmx
# see http://www.opendarwin.org/bugzilla/show_bug.cgi?id=2194
#
# note: this is just enough to bootstrap the compiler, 
# some floating point compiliations might fail

sudo ln -s /usr/lib/libSystem.B.dylib /usr/lib/libmx.dylib

# install new cctools

# according to: http://gcc.gnu.org/ml/gcc-patches/2004-08/msg00104.html
# and: http://gcc.gnu.org/ml/gcc-patches/2004-10/msg01222.html
# newer cctools are needed to build HEAD of gcc
# Since building Apples cctools is somewhat complicated and
# won't work on (Open)Darwin/x86 better use OpenDarwin cctools (odcctools)
# see: http://www.opendarwin.org/projects/odcctools/
# and: http://www.opendarwin.org/projects/odcctools/usingodcctools.html 
# and: 
http://www.opendarwin.org/pipermail/odcctools/2004-October/000033.html

ftp http://www.opendarwin.org/downloads/odcctools-20041018.tar.bz2
tar -jxf odcctools-20041018.tar.bz2
mkdir odcctools-build
cd odcctools-build/
../odcctools-20041018/configure --prefix=/usr
make
sudo make install
cd ..


Bootstrapped like:
==================

# bootstrap the compiler

# note: those STAGE1_CFLAGS are needed to avoid
# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14780

ftp 
ftp://gcc.gnu.org/pub/gcc/snapshots/4.0-20041212/gcc-4.0-20041212.tar.bz2
openssl md5 gcc-4.0-20041212.tar.bz2
tar -jxf gcc-4.0-20041212.tar.bz2
cd gcc-build/
rm -rf *
../gcc-4.0-20041212/configure --prefix=/tmp/gcc
make bootstrap STAGE1_CFLAGS="-no-cpp-precomp -Wa,-force_cpusubtype_ALL"



Result of attempted bootstrap:
==============================

Comparing stage2 and stage3 of the compiler
rm -f .bad_compare
case "gnucompare" in *compare | *compare-lean ) stage=2 ;; * ) stage=`echo 
gnucompare | sed -e 's,^[a-z]*compare\([0-9][0-9]*\).*,\1,'` ;; esac; \
for dir in . cp java objc build; do \
  if [ "`echo $dir/*.o`" != "$dir/*.o" ] ; then \
    for file in $dir/*.o; do \
      case "gnucompare" in \
        slowcompare* ) \
          tail +16c ./$file > tmp-foo1; \
          tail +16c stage$stage/$file > tmp-foo2 \
            && (cmp tmp-foo1 tmp-foo2 > /dev/null 2>&1 || echo $file 
differs >> .bad_compare) || true; \
          ;; \
        fastcompare* ) \
          cmp $file stage$stage/$file 16 16 > /dev/null 2>&1; \
          test $? -eq 1 && echo $file differs >> .bad_compare || true; \
          ;; \
        gnucompare* ) \
          cmp --ignore-initial=16 $file stage$stage/$file > /dev/null 
2>&1; \
          test $? -eq 1 && echo $file differs >> .bad_compare || true; \
          ;; \
      esac ; \
    done; \
  else true; fi; \
done
rm -f tmp-foo*
case "gnucompare" in *compare | *compare-lean ) stage=2 ;; * ) stage=`echo 
gnucompare | sed -e 's,^[a-z]*compare\([0-9][0-9]*\).*,\1,'` ;; esac; \
if [ -f .bad_compare ]; then \
  echo "Bootstrap comparison failure!"; \
  cat .bad_compare; \
  exit 1; \
else \
  case "gnucompare" in \
    *-lean ) rm -rf stage$stage ;; \
    *) ;; \
  esac; true; \
fi
Bootstrap comparison failure!
./reload.o differs
make[1]: *** [gnucompare] Error 1
make: *** [bootstrap] Error 2




This is a regression since bootstrap worked for 4.0.0 20041205. 
See: http://gcc.gnu.org/ml/gcc-testresults/2004-12/msg00276.html

I'll open a bug report on this later the day (don't have my bugzilla 
password handy here ...)



regards, Lars