Re: unmet direct dependencies in -next

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Am 10.08.2015 um 13:12 schrieb Michal Marek:
> On 2015-08-10 11:14, Richard Weinberger wrote:
>> Am 10.08.2015 um 11:10 schrieb Lee Jones:
>>> On Sun, 09 Aug 2015, Richard Weinberger wrote:
>>>
>>>> Hi!
>>>>
>>>> -next faces some build issues on UML because of unmet direct dependencies.
>>>> Mostly due to HAS_IOMEM and I2C.
>>>>
>>>> warning: (MEDIA_SUBDRV_AUTOSELECT && VIDEO_CX231XX && INV_MPU6050_IIO) selects I2C_MUX which has unmet direct dependencies (I2C && HAS_IOMEM)
>>>> warning: (ST_IRQCHIP && HIP04_ETH && STMMAC_PLATFORM && DWMAC_IPQ806X && DWMAC_LPC18XX && DWMAC_ROCKCHIP && DWMAC_SOCFPGA && DWMAC_STI && TI_CPSW && PINCTRL_ROCKCHIP &&
>>>> PINCTRL_DOVE && POWER_RESET_KEYSTONE && POWER_RESET_SYSCON && POWER_RESET_SYSCON_POWEROFF && S3C2410_WATCHDOG && VIDEO_OMAP3 && VIDEO_S5P_FIMC && RTC_DRV_AT91SAM9 && VIDEO_OMAP4 &&
>>>> HWSPINLOCK_QCOM && ATMEL_ST && QCOM_GSBI) selects MFD_SYSCON which has unmet direct dependencies (HAS_IOMEM)
>>>> warning: (MEDIA_SUBDRV_AUTOSELECT && VIDEO_CX231XX && INV_MPU6050_IIO) selects I2C_MUX which has unmet direct dependencies (I2C && HAS_IOMEM)
>>>> warning: (ST_IRQCHIP && HIP04_ETH && STMMAC_PLATFORM && DWMAC_IPQ806X && DWMAC_LPC18XX && DWMAC_ROCKCHIP && DWMAC_SOCFPGA && DWMAC_STI && TI_CPSW && PINCTRL_ROCKCHIP &&
>>>> PINCTRL_DOVE && POWER_RESET_KEYSTONE && POWER_RESET_SYSCON && POWER_RESET_SYSCON_POWEROFF && S3C2410_WATCHDOG && VIDEO_OMAP3 && VIDEO_S5P_FIMC && RTC_DRV_AT91SAM9 && VIDEO_OMAP4 &&
>>>> HWSPINLOCK_QCOM && ATMEL_ST && QCOM_GSBI) selects MFD_SYSCON which has unmet direct dependencies (HAS_IOMEM)
>>>>
>>>> For example MFD_SYSCON cannot build on UML as it depends on HAS_IOMEM.
>>>> While the symbol MFD_SYSCON has correct dependencies some users of MFD_SYSCON
>>>> just issue a "select MFD_SYSCON" and bypass the HAS_IOMEM dependency and causing the build to fail.
>>>>
>>>> This brings me to a question on kconfig itself, wouldn't it be better to just disable a symbol if it has
>>>> unmet direct dependencies?
> 
> The result of the given .config does not matter as much. The point of
> the warnings is that there are missing select statements in the Kconfig
> files.

IMHO the situation could be improved.
What about of failing hard "Your Kconfig is broken" or as I wrote disabling affected symbols?

The current warning is something between.
Kbuild detects that something is broken but produces a .config file.

Thanks,
//richard
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