Imx6 DTC, sysroot error

Technical Support
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1

Hello.

I am using Apalis iMX6Q, Ixora board.
I follow the article [Build U-Boot and Linux Kernel from Source Code].
I installed the toolchain and compiled U-Boot.
However, I have 2 problems.

  1. when I set DTC, I get an error message.

    ubuntu16-2:~$ dtc -v
    Version: DTC 1.4.0
    ubuntu16-2:~$ cd dtc/
    ubuntu16-2:~/dtc$ make
    CHK version_gen.h
    LEX convert-dtsv0-lexer.lex.c
    make: flex: Command not found
    BISON dtc-parser.tab.c
    make: bison: Command not found
    LEX dtc-lexer.lex.c
    make: flex: Command not found
    make: *** No rule to make target ‘convert-dtsv0-lexer.lex.c’, needed by ‘convert-dtsv0-lexer.lex.o’. Stop.

  2. when I set sysroot, I get an error message.

  3. List item

And my computer has a oe-core/build/tmp-glibc/sysroots
directory instead of the oe-core/build/out-libc/sysroots
directory.
But the directory is empty.

~/u-boot-toradex$ make CC='arm-angstrom-linux-gnueabi-gcc  --sysroot=${HOME}/oe-core/build/out-glibc/sysroots/colibri-vf'
make: arm-angstrom-linux-gnueabi-gcc: Command not found
./scripts/gcc-version.sh: line 25: arm-angstrom-linux-gnueabi-gcc: command not found
./scripts/gcc-version.sh: line 26: arm-angstrom-linux-gnueabi-gcc: command not found
*** Your GCC does not produce working binaries in THUMB mode.
*** Your board is configured for THUMB mode.
arch/arm/config.mk:49: recipe for target 'checkthumb' failed
make: *** [checkthumb] Error 1

I don’t know what to do to solve this problem.
Help me, please.

Apalis iMX6Q 1GB V1.1B

Ixora V1.1A

LINUX

Toolchain: gcc-linaro-7.3.1-2018.05-x86_64_arm-linux-gnueabihf.tar.xz