ghdl version 0.29+gcc4.3.4+dfsg-1build1 failed to build on amd64 with GCC-4.6/oneiric

ghdl version 0.29+gcc4.3.4+dfsg-1build1 failed to build on amd64 with GCC-4.6/oneiric
Link to failed build: https://launchpad.net/ubuntu/+archive/test-rebuild-20110413/+buildjob/2450991

Details about the rebuild:
https://lists.ubuntu.com/archives/ubuntu-devel/2011-April/033042.html

Direct link to the build log: https://launchpad.net/ubuntu/+archive/test-rebuild-20110413/+buildjob/2450991/+files/buildlog_ubuntu-natty-amd64.ghdl_0.29%2Bgcc4.3.4%2Bdfsg-1build1_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 4196 lines into the build log:

/build/buildd/ghdl-0.29+gcc4.3.4+dfsg/gcc/build/./gcc/xgcc -B/build/buildd/ghdl-0.29+gcc4.3.4+dfsg/gcc/build/./gcc/ -B/usr/lib/ghdl/x86_64-linux-gnu/bin/ -B/usr/lib/ghdl/x86_64-linux-gnu/lib/ -isystem /usr/lib/ghdl/x86_64-linux-gnu/include -isystem /usr/lib/ghdl/x86_64-linux-gnu/sys-include -O2 -g -O -O2 -O2 -g -O -DIN_GCC -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -isystem ./include -fPIC -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED -I. -I. -I../.././gcc -I../../../libgcc -I../../../libgcc/. -I../../../libgcc/../gcc -I../../../libgcc/../include -I../../../libgcc/config/libbid -DENABLE_DECIMAL_BID_FORMAT -DHAVE_CC_TLS -DUSE_TLS -o _muldi3.o -MT _muldi3.o -MD -MP -MF _muldi3.dep -DL_muldi3 -c ../../../libgcc/../gcc/libgcc2.c \

In file included from /usr/include/bits/errno.h:25,
                 from /usr/include/errno.h:36,
                 from ../../../libgcc/../gcc/tsystem.h:96,
                 from ../../../libgcc/../gcc/libgcc2.c:33:
/usr/include/linux/errno.h:4:23: error: asm/errno.h: No such file or directory
make[3]: *** [_muldi3.o] Error 1
make[3]: Leaving directory `/build/buildd/ghdl-0.29+gcc4.3.4+dfsg/gcc/build/x86_64-linux-gnu/libgcc'
make[2]: *** [all-target-libgcc] Error 2
make[2]: Leaving directory `/build/buildd/ghdl-0.29+gcc4.3.4+dfsg/gcc/build'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/build/buildd/ghdl-0.29+gcc4.3.4+dfsg/gcc/build'
make: *** [build-stamp] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20110422-2202
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/ghdl-0.29+gcc4.3.4+dfsg