U-Boot build issue

[atian]

Hi, we need to build the U-boot in standalone environment for 8MMINILPD4-EVK , but it's not working properly.. Please advise the solution for build the U-boot and solve our problem.

①Version：
Ubuntu 16.04 LTS
imx-yocto-L4.14.98_2.0.0_ga
gcc (Ubuntu 5.4.0-6ubuntu1~16.04.12) 5.4.0 20160609
sdk：DISTRO=fsl-imx-fb MACHINE=imx8mmevk bitbake core-image-minimal -c populate_sdk
defconfig：imx8mm_evk_defconfig
②Reference documents：i.MX_Porting_GuideL4.14.98-2.0.0_ga.pdf
③Error message：
gcc: error: unrecognized command line option ‘-mgeneral-regs-only’

[Forlinx]

we have i.MX8M Mini based EVK and SoM with supporting of Linux4.14.78 with QT5.10, and also supporting of Android9.0, if you need help, you can send us email to grace@forlinx.com