Hey.
I don't know what commit did this, but it worked last time I tried in november. I'm building master x86_64
make.conf:
WORLD_CCVER=gcc44
NO_WERROR=yes
cc -O -pipe -march=athlon64 -I/usr/obj/usr/src/world_x86_64/usr/src/gnu/usr.bin/cc41/libbackend//../cc_prep -I/usr/src/gnu/usr.bin/cc41/libbackend//../cc_prep -I/usr/src/gnu/usr.bin/cc41/libbackend//../cc_prep/config -I/usr/src/gnu/usr.bin/cc41/libbackend//../../../../contrib/gcc-4.1/gcc -I/usr/src/gnu/usr.bin/cc41/libbackend//../../../../contrib/gcc-4.1/gcc/config -I/usr/src/gnu/usr.bin/cc41/libbackend//../../../../contrib/gcc-4.1/include -I/usr/src/gnu/usr.bin/cc41/libbackend//../../../../contrib/gcc-4.1/libcpp/include -DIN_GCC -DHAVE_CONFIG_H -DPREFIX=\"/usr\" -DPREFIX1=\"/usr\" -DPREFIX2=\"/usr\" -I/usr/obj/usr/src/world_x86_64/usr/src/gnu/usr.bin/cc41/libbackend//../cc_tools/gen -I/usr/src/gnu/usr.bin/cc41/libbackend/../config -I. -DTARGET_NAME=\"x86_64-pc-dragonflybsd\" -std=gnu99 -c /usr/src/gnu/usr.bin/cc41/libbackend//../../../../contrib/gcc-4.1/gcc/toplev.c -o toplev.o
/usr/src/gnu/usr.bin/cc41/libbackend//../../../../contrib/gcc-4.1/gcc/toplev.c:524: error: redefinition of 'floor_log2'
/usr/src/gnu/usr.bin/cc41/libbackend//../../../../contrib/gcc-4.1/gcc/toplev.h:175: note: previous definition of 'floor_log2' was here
/usr/src/gnu/usr.bin/cc41/libbackend//../../../../contrib/gcc-4.1/gcc/toplev.c:559: error: redefinition of 'exact_log2'
/usr/src/gnu/usr.bin/cc41/libbackend//../../../../contrib/gcc-4.1/gcc/toplev.h:181: note: previous definition of 'exact_log2' was here
*** Error code 1
Stop in /usr/src/gnu/usr.bin/cc41/libbackend.
*** Error code 1
Stop in /usr/src/gnu/usr.bin/cc41.
*** Error code 1
Stop in /usr/src/gnu/usr.bin.
*** Error code 1
Stop in /usr/src/gnu.
*** Error code 1
Stop in /usr/src.
*** Error code 1