After enable the UMS command in U-boot i get error message
cmd/built-in.o: In function `do_usb_mass_storage':
/home/angu/bbx15_test/ti-u-boot/cmd/usb_mass_storage.c:217: undefined reference to `fsg_main_thread'
/home/angu/bbx15_test/ti-u-boot/cmd/usb_mass_storage.c:170: undefined reference to `fsg_init'
/home/angu/bbx15_test/gcc-linaro-6.4.1-2017.11-x86_64_arm-linux-gnueabihf/bin/arm-linux-gnueabihf-ld.bfd: BFD (Linaro_Binutils-2017.11) 2.27.0.20161229 assertion fail /home/tcwg-buildslave/workspace/tcwg-make-release/builder_arch/amd64/label/tcwg-x86_64-build/target/arm-linux-gnueabihf/snapshots/binutils-gdb.git~users~linaro~binutils-2_27-branch/bfd/elf32-arm.c:8784
/home/angu/bbx15_test/gcc-linaro-6.4.1-2017.11-x86_64_arm-linux-gnueabihf/bin/arm-linux-gnueabihf-ld.bfd: BFD (Linaro_Binutils-2017.11) 2.27.0.20161229 assertion fail /home/tcwg-buildslave/workspace/tcwg-make-release/builder_arch/amd64/label/tcwg-x86_64-build/target/arm-linux-gnueabihf/snapshots/binutils-gdb.git~users~linaro~binutils-2_27-branch/bfd/elf32-arm.c:8784