I'm trying to build the latest gumstix buildroot revision (1211) with the 'generic development system' board support option. Unfortunately, making ed failed. It appears to be a linking problem but I don't know enough to do anything about it..

make -j3 CC=/home/alex/gumstix/gumstix-buildroot/build_arm_nofpu/staging_dir/bin/arm-linux-uclibcgnueabi-gcc -C /home/alex/gumstix/gumstix-buildroot/build_arm_nofpu/ed-0.2
make[1]: Entering directory `/home/alex/gumstix/gumstix-buildroot/build_arm_nofpu/ed- 0.2'
/home/alex/gumstix/gumstix-buildroot/build_arm_nofpu/staging_dir/bin/arm-linux-uclibcgnueabi-gcc  -o ed buf.o glbl.o io.o main.o re.o signal.o sub.o undo.o version.o
io.o: In function `put_tty_line':
io.c:(.text+0x52c): undefined reference to `index'
main.o: In function `is_legal_filename':
main.c:(.text+0xd4): undefined reference to `index'
collect2: ld returned 1 exit status
make[1]: *** [ed] Error 1
make[1]: Leaving directory `/home/alex/gumstix/gumstix-buildroot/build_arm_nofpu/ed-0.2'
make: *** [/home/alex/gumstix/gumstix-buildroot/build_arm_nofpu/ed-0.2/ed] Error 2

Is there a problem with my system? Can other people get this to build?