с этой ошибкой разобрался. сейчас вылезла вот такая
make mx23sk /build
/bin/bash: arm-linux-gcc: command not found
/bin/bash: arm-linux-gcc: command not found
dirname: missing operand
Try `dirname --help' for more information.
Configuring for mx23sk board...
make
/bin/bash: arm-linux-gcc: command not found
/bin/bash: arm-linux-gcc: command not found
dirname: missing operand
Try `dirname --help' for more information.
make[1]: Entering directory `/home/artem/u-boot-sk'
Generating include/autoconf.mk
/bin/bash: line 3: arm-linux-gcc: command not found
Generating include/autoconf.mk.dep
/bin/bash: line 3: arm-linux-gcc: command not found
make[1]: Leaving directory `/home/artem/u-boot-sk'
/bin/bash: arm-linux-gcc: command not found
/bin/bash: arm-linux-gcc: command not found
dirname: missing operand
Try `dirname --help' for more information.
make[1]: Entering directory `/home/artem/u-boot-sk'
/bin/bash: arm-linux-gcc: command not found
/bin/bash: arm-linux-ld: command not found
arm-linux-gcc -DDO_DEPS_ONLY \
-g -Os -fno-common -ffixed-r8 -msoft-float -D__KERNEL__ -I/home/artem/u-boot-sk/include -fno-builtin -ffreestanding -nostdinc -isystem -pipe -DCONFIG_ARM -D__ARM__ -march=armv5te -Wall -Wstrict-prototypes \
-o lib/asm-offsets.s lib/asm-offsets.c -c -S
/bin/bash: arm-linux-gcc: command not found
make[1]: *** [lib/asm-offsets.s] Error 127
make[1]: Leaving directory `/home/artem/u-boot-sk'
make: *** [mx23sk] Error 2
вот подсказка ^^^
у вас вероятно что-то типа arm-none-bla-bla
смотрите в переменных окружения (printenv) или в Makefile - меняете на то, что у вас в системе..