gcc-h8300-hms version 1:3.4.6-5 failed to build on i386

gcc-h8300-hms version 1:3.4.6-5 failed to build on i386
Link to failed build: https://launchpad.net/ubuntu/+archive/test-rebuild-20110329/+buildjob/2393253

Direct link to the build log: https://launchpad.net/ubuntu/+archive/test-rebuild-20110329/+buildjob/2393253/+files/buildlog_ubuntu-natty-i386.gcc-h8300-hms_1%3A3.4.6-5_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 5826 lines into the build log:

cc -Wall -O2 -DIN_GCC -DCROSS_COMPILE -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -pedantic -Wno-long-long -DHAVE_CONFIG_H -I. -I. -I../../gcc -I../../gcc/. -I../../gcc/../include \
 -DTARGET_MACHINE=\"h8300-hitachi-coff\" \
 -c ../../gcc/collect2.c -o collect2.o
In file included from /usr/include/fcntl.h:252:0,
                 from ../../gcc/system.h:214,
                 from ../../gcc/collect2.c:30:
In function 'open',
    inlined from 'collect_execute' at ../../gcc/collect2.c:1537:20:
/usr/include/bits/fcntl2.h:51:24: error: call to '__open_missing_mode' declared with attribute error: open with O_CREAT in second argument needs 3 arguments
make[2]: *** [collect2.o] Error 1
make[2]: Leaving directory `/build/buildd/gcc-h8300-hms-3.4.6/builddir-h8300-hitachi-coff/gcc'
make[1]: *** [all-gcc] Error 2
make[1]: Leaving directory `/build/buildd/gcc-h8300-hms-3.4.6/builddir-h8300-hitachi-coff'
make: *** [build-stamp] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20110408-1857
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/gcc-h8300-hms-3.4.6