u-boot build fail issue

[inhwa]

Please help me to solve this issue.
I am newbie of embedded linux and studying with MELP book.
I built crosstool-ng successfully. but with this compiler, the u-boot.v2017.01 won't.
what i used defconfig are am335x_boneblack_defconfig and am335x_boneblack_vboot_defconfig.
So I tried the latest u-boot (v2024.01), and the build is done successfully.
Unfortunately, in the v2024.01 code, there is only am335x_boneblack_vboot_defconfig. I can't make sure that using vboot_deconfig is good or not.
And I tried with other cross compiler, gcc-linaro-6.5.0-2018.12-x86_64_arm-linux-gnueabihf.
With linaro compiler, the build was done successfully.
I want to know what is problem.

• error says missing argument to '-march='. So I added -march=armv7-a into make command (make CROSS_COMPILE=~~, -march=armv7-a), but it was not working... Invalid option.. Please let me know how to add '-march=' armument in order to solve this error
• With the compiler built by me(arm-cortex_a8~~), the build is fail. But with the linaro compiler, the build is done successfully.
  I wonder if my build might have some problem. But I tried 3 times... Ubuntu 20.04 on my laptop, Ubuntu 18.04 on VirtualBox and Ubuntu 14.04 on HyberV. but all these work are fail.
  Please give me some clue to solve this error.

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ihchoi@ihchoi-laptop:~/Xilinx/Project/BeagleBoneBlack/u-boot-2017.01$ make
scripts/kconfig/conf --silentoldconfig Kconfig
CHK include/config.h
UPD include/config.h
CFG u-boot.cfg
GEN include/autoconf.mk
GEN include/autoconf.mk.dep
CFG spl/u-boot.cfg
GEN spl/include/autoconf.mk
CHK include/config/uboot.release
UPD include/config/uboot.release
CHK include/generated/version_autogenerated.h
UPD include/generated/version_autogenerated.h
CHK include/generated/timestamp_autogenerated.h
UPD include/generated/timestamp_autogenerated.h
CC lib/asm-offsets.s
arm-cortex_a8-linux-gnueabihf-gcc: error: unrecognized -march target: armv5
arm-cortex_a8-linux-gnueabihf-gcc: note: valid arguments are: armv4 armv4t armv5t armv5te armv5tej armv6 armv6j armv6k armv6z armv6kz armv6zk armv6t2 armv6-m armv6s-m armv7 armv7-a armv7ve armv7-r armv7-m armv7e-m armv8-a armv8.1-a armv8.2-a armv8.3-a armv8.4-a armv8.5-a armv8.6-a armv8-m.base armv8-m.main armv8-r armv8.1-m.main armv9-a iwmmxt iwmmxt2; did you mean 'armv4'?
arm-cortex_a8-linux-gnueabihf-gcc: error: missing argument to '-march='
make[1]: *** [Kbuild:44: lib/asm-offsets.s] Error 1
make: *** [Makefile:1270: prepare0] Error 2