Re: [gentoo-user] Raiders of the lost package...

[Dale <rdalek1967@gmail.com>]

meino.cramer@gmx.de wrote:
> Hi,
>
> Debain everywhere...
> Ubuntu everywhere...
>
> "To use this library just do a apt-get build-essential, apt-get this
> and apt-get that...your done".
>
> Hrrrmpppfff....
>
> What the heck is "build-essential?" What's hidden behind it?
>
> I am currently facing a similiar problem: I am trying to get
> a TFT display running. For using this library to access this TFT 
> one "only" needs to do a ...guess... "apt-get python smbus".
>
> Neither "smbus' nor "I2C" produces any match in the output of
> eix...
>
> What's that package? Is it in Gentoo?
>
> Any help is very appreciated :)
>
> Best regards,
> mcc
>

I2c is in the kernel.  I use it to access my temps and such here.  Just
a small snippet:

root@fireball / # zcat /proc/config.gz | grep -i i2c
# CONFIG_BMP085_I2C is not set
# CONFIG_SENSORS_LIS3_I2C is not set
CONFIG_MOUSE_SYNAPTICS_I2C=y
CONFIG_I2C=y
CONFIG_I2C_BOARDINFO=y
CONFIG_I2C_COMPAT=y
CONFIG_I2C_CHARDEV=y
# CONFIG_I2C_MUX is not set
CONFIG_I2C_HELPER_AUTO=y
CONFIG_I2C_ALGOBIT=y


SMBUS I think is in the same category.  From a search for smbus from
within menuconfig:

 Symbol: I2C_SMBUS
[=n]                                                                                                                                                               
│ 
  │ Type  :
tristate                                                                                                                                                                     
│ 
  │ Prompt: SMBus-specific
protocols                                                                                                                                                     
│ 
  │  
Location:                                                                                                                                                                          
│ 
  │     -> Device
Drivers                                                                                                                                                                
│ 
  │       -> I2C support (I2C
[=y])                                                                                                                                                      
│ 
  │ (1)     -> Autoselect pertinent helper modules (I2C_HELPER_AUTO
[=y])                                                                                                                
│ 
  │   Defined at
drivers/i2c/Kconfig:76                                                                                                                                                  
│ 
  │   Depends on: I2C
[=y]                                                                                                                                                               
│ 
  │   Selected by: I2C_PARPORT [=n] && I2C [=y] && HAS_IOMEM [=y] &&
PARPORT [=y] || I2C_PARPORT_LIGHT [=n] && I2C [=y] && HAS_IOMEM
[=y]                                                 │ 
  │

If I recall correctly, SMBUS and I2C work together on getting temps and
fan speeds and such. 

Also, some folks use lm-sensors.  I think it does the same but in user
space instead of kernel space.  That's my understanding anyway. 

Hope that helps.

Dale

:-)  :-)