使用ubuntu64位，编译SDK时出现arm-none-eabi-ld: cannot find -lgcc 错我，尝试了更新gcc的库还是不行,
-L/Debug -o Debug_MMCSD/boot.out -Map Debug_MMCSD/boot.map \
Debug_MMCSD/*.o* --defsym BOOT_START_ADDR=0x402F0400 -T boot.lds -ldrivers -lutils -lplatform -lmmcsd -lc -lgcc -ldrivers -lutils -lplatform -lmmcsd -lc -lgcc
arm-none-eabi-ld: cannot find -lc
arm-none-eabi-ld: cannot find -lgcc
arm-none-eabi-ld: cannot find -lc
arm-none-eabi-ld: cannot find -lgcc
makefile:139: recipe for target 'bin' failed
