u-boot fails to build in trusty on powerpc with toolchain updates. seen at
https://launchpad.net/ubuntu/+archive/test-rebuild-20150317/+build/7081894
make[2]: Leaving directory `/build/buildd/u-boot-2013.10/board/evb64260'
cd /build/buildd/u-boot-2013.10/debian/build/ZUMA && ld.bfd -n -T /build/buildd/u-boot-2013.10/debian/build/ZUMA/u-boot.lds --gc-sections -Bstatic -Ttext 0xfff00000 arch/powerpc/cpu/74xx_7xx/start.o --start-group api/libapi.o arch/powerpc/cpu/74xx_7xx/lib74xx_7xx.o arch/powerpc/lib/libpowerpc.o common/libcommon.o disk/libdisk.o drivers/bios_emulator/libatibiosemu.o drivers/block/libblock.o drivers/crypto/libcrypto.o drivers/dfu/libdfu.o drivers/dma/libdma.o drivers/fpga/libfpga.o drivers/gpio/libgpio.o drivers/hwmon/libhwmon.o drivers/i2c/libi2c.o drivers/input/libinput.o drivers/misc/libmisc.o drivers/mmc/libmmc.o drivers/mtd/libmtd.o drivers/mtd/nand/libnand.o drivers/mtd/onenand/libonenand.o drivers/mtd/spi/libspi_flash.o drivers/mtd/ubi/libubi.o drivers/net/libnet.o drivers/net/phy/libphy.o drivers/pci/libpci.o drivers/pcmcia/libpcmcia.o drivers/power/battery/libbattery.o drivers/power/fuel_gauge/libfuel_gauge.o drivers/power/libpower.o drivers/power/mfd/libmfd.o drivers/power/pmic/libpmic.o drivers/rtc/librtc.o drivers/serial/libserial.o drivers/sound/libsound.o drivers/spi/libspi.o drivers/tpm/libtpm.o drivers/twserial/libtws.o drivers/usb/eth/libusb_eth.o drivers/usb/gadget/libusb_gadget.o drivers/usb/host/libusb_host.o drivers/usb/musb-new/libusb_musb-new.o drivers/usb/musb/libusb_musb.o drivers/usb/phy/libusb_phy.o drivers/usb/ulpi/libusb_ulpi.o drivers/video/libvideo.o drivers/watchdog/libwatchdog.o fs/cbfs/libcbfs.o fs/cramfs/libcramfs.o fs/ext4/libext4fs.o fs/fat/libfat.o fs/fdos/libfdos.o fs/jffs2/libjffs2.o fs/libfs.o fs/reiserfs/libreiserfs.o fs/sandbox/libsandboxfs.o fs/ubifs/libubifs.o fs/yaffs2/libyaffs2.o fs/zfs/libzfs.o lib/libfdt/libfdt.o lib/libgeneric.o lib/lzma/liblzma.o lib/lzo/liblzo.o lib/rsa/librsa.o lib/zlib/libz.o net/libnet.o post/libpost.o test/libtest.o board/evb64260/libevb64260.o --end-group -L /usr/lib/gcc/powerpc-linux-gnu/4.8 -lgcc -Map u-boot.map -o u-boot
ld.bfd: _GLOBAL_OFFSET_TABLE_ not defined in linker created .got
ld.bfd: final link failed: Bad value
make[1]: *** [/build/buildd/u-boot-2013.10/debian/build/ZUMA/u-boot] Error 1
make[1]: Leaving directory `/build/buildd/u-boot-2013.10'
make: *** [build-arch] Error 2
dpkg-buildpackage: error: debian/rules build-arch gave error exit status 2
