When enabling CONFIG_ENV_IS_IN_EXT4 the environment might be stored on an mmc device similar to the CONFIG_ENV_IS_IN_FAT case. Enable CONFIG_SYS_MMC_ENV_DEV in this case.
bananapi_m64_defconfig with CONFIG_ENV_IS_NOWHERE results in:
board/sunxi/board.c: In function 'mmc_get_env_dev': board/sunxi/board.c:535:24: error: 'CONFIG_SYS_MMC_ENV_DEV' undeclared (first use in this function) 535 | return CONFIG_SYS_MMC_ENV_DEV; | ^~~~~~~~~~~~~~~~~~~~~~
Check if CONFIG_SYS_MMC_ENV_DEV is defined.
Heinrich Schuchardt (2): env: ENV_IS_IN_EXT4 should enable SYS_MMC_ENV_DEV sunxi: CONFIG_SYS_MMC_ENV_DEV undeclared
board/sunxi/board.c | 2 +- env/Kconfig | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)