warning: attempt to assign the value '8' to the undefined symbol LV_Z_MEM_POOL_NUMBER_BLOCKS when upgrading toolchain to 2.6.0

Question

I was just updating a the nrf Connect toolchain version from 2.5.2 to 2.6 and got this error message: 
 
 warning: attempt to assign the value '8' to the undefined symbol LV_Z_MEM_POOL_NUMBER_BLOCKS

ovrebekk · Accepted Answer

Hi Leo 
 It seems the way the LVGL heap is configured is handled a bit differently in the latest version. 
 In v2.5.2 the heap was scaled based on the LV_Z_MEM_POOL_MAX_SIZE and LV_Z_MEM_POOL_NUMBER_BLOCKS parameters as seen here . 
 In the later version this was simplified to use just a single parameter, LV_Z_MEM_POOL_SIZE, as seen here . 
 In other words you should change your project configuration to use this new parameter. 
 The commit log provides a bit more context: https://github.com/nrfconnect/sdk-zephyr/commit/c7f8033f2b982a0d5548da458e00bee2e3a19502 
 Best regards Torbjørn

warning: attempt to assign the value '8' to the undefined symbol LV_Z_MEM_POOL_NUMBER_BLOCKS when upgrading toolchain to 2.6.0

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