Loader.img make fails

[nordoff]

I'm trying to build this demo and the build fails when making the loader.img.
$ make Demo.bin succeeds, but
$ make loader.img always fails with

arm-none-eabi-gcc -Tcortex-a9.lds -mcpu=cortex-a9 -o loader.out loader.c
/usr/bin/../lib/gcc/arm-none-eabi/4.7.3/../../../../arm-none-eabi/lib/armv7-ar/thumb/crt0.o: In function `start':
(.text+0x64): undefined reference to `__bss_start__'
/usr/bin/../lib/gcc/arm-none-eabi/4.7.3/../../../../arm-none-eabi/lib/armv7-ar/thumb/crt0.o: In function `start':
(.text+0x68): undefined reference to `__bss_end__'
/usr/bin/../lib/gcc/arm-none-eabi/4.7.3/../../../../arm-none-eabi/lib/armv7-ar/thumb/libc.a(lib_a-exit.o): In function `exit':
exit.c:(.text.exit+0x16): undefined reference to `_exit'
/usr/bin/../lib/gcc/arm-none-eabi/4.7.3/../../../../arm-none-eabi/lib/armv7-ar/thumb/libc.a(lib_a-fini.o): In function `__libc_fini_array':
fini.c:(.text.__libc_fini_array+0x20): undefined reference to `_fini'
/usr/bin/../lib/gcc/arm-none-eabi/4.7.3/../../../../arm-none-eabi/lib/armv7-ar/thumb/libc.a(lib_a-init.o): In function `__libc_init_array':
init.c:(.text.__libc_init_array+0x1e): undefined reference to `_init'
collect2: error: ld returned 1 exit status

I'm compiling on the Pandaboard with Ubuntu 12.04LTS server:

$ uname -a
Linux pandaes1-bf 3.2.0-1412-omap4 #16-Ubuntu SMP PREEMPT Tue Apr 17 19:38:42 UTC 2012 armv7l armv7l armv7l GNU/Linux
$ arm-none-eabi-gcc -v
Using built-in specs.
COLLECT_GCC=arm-none-eabi-gcc
COLLECT_LTO_WRAPPER=/usr/bin/../lib/gcc/arm-none-eabi/4.7.3/lto-wrapper
Target: arm-none-eabi
Configured with: /build/buildd/gcc-arm-none-eabi-4-7-2013q1/src/gcc/configure --target=arm-none-eabi --prefix=/build/buildd/gcc-arm-none-eabi-4-7-2013q1/install-native --libexecdir=/build/buildd/gcc-arm-none-eabi-4-7-2013q1/install-native/lib --infodir=/build/buildd/gcc-arm-none-eabi-4-7-2013q1/install-native/share/doc/gcc-arm-none-eabi/info --mandir=/build/buildd/gcc-arm-none-eabi-4-7-2013q1/install-native/share/doc/gcc-arm-none-eabi/man --htmldir=/build/buildd/gcc-arm-none-eabi-4-7-2013q1/install-native/share/doc/gcc-arm-none-eabi/html --pdfdir=/build/buildd/gcc-arm-none-eabi-4-7-2013q1/install-native/share/doc/gcc-arm-none-eabi/pdf --enable-languages=c,c++ --disable-decimal-float --disable-libffi --disable-libgomp --disable-libmudflap --disable-libquadmath --disable-libssp --disable-libstdcxx-pch --disable-nls --disable-shared --disable-threads --disable-tls --with-gnu-as --with-gnu-ld --with-newlib --with-headers=yes --with-python-dir=share/gcc-arm-none-eabi --with-sysroot=/build/buildd/gcc-arm-none-eabi-4-7-2013q1/install-native/arm-none-eabi --with-host-libstdcxx='-static-libgcc -Wl,-Bstatic,-lstdc++,-Bdynamic -lm' --with-pkgversion='GNU Tools for ARM Embedded Processors' --with-multilib-list=armv6-m,armv7-m,armv7e-m,armv7-r
Thread model: single
gcc version 4.7.3 20130312 (release) [ARM/embedded-4_7-branch revision 196615] (GNU Tools for ARM Embedded Processors)
$ mkimage -V
mkimage version 2011.09

What am I missing here?