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REmaxer
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Joined: 03 Sep 2011
Posts: 143

PostPosted: Sun Oct 16, 2011 10:42 am    Post subject: Bluetooth subsystem support module depends Reply with quote

I wanna build as built-in bluetooth-subsystem-support but when i try to do it i get an warning message:
Code:

This feature depends on another which has been configured as a module.As a result, this feature will be built as a module.



What's another feature?
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wklam
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Joined: 09 May 2005
Posts: 40

PostPosted: Thu Oct 04, 2012 10:05 pm    Post subject: Reply with quote

I bumped into the very same problem. A google search brought me to this.

Here is what worked for me to have bluetooth-subsystem-support built-in to the kernel instead of a module.

If you look at:

Code:

/usr/src/linux/net/bluetooth/Kconfig


This is where it has all the dependency listed for kernel menuconfig for bluetooth.

So on bluetooth subsystem support "BT" It says:

Code:


menuconfig BT
        tristate "Bluetooth subsystem support"
        depends on NET && !S390
        depends on RFKILL || !RFKILL
        select CRC16
        select CRYPTO
        select CRYPTO_BLKCIPHER
        select CRYPTO_AES
        select CRYPTO_ECB
...


Please note that the logical operations like "||" and "&&" and "!" are not simple logical operations just like in programming languages. They are actually calculation to refer to 0 (N), 1 (Y) or 2 (M).

If you are curious what these operators actually mean:

http://www.kernel.org/doc/Documentation/kbuild/kconfig-language.txt

For the above BT, it means, it depends on
1) (NET) Networking, and
2) (RFKILL) RF switch subsystem support (RF kill switch)

Once you select RFKILL and NET as built-in, then it will go ahead and select CRC16, CRYPTO, CRYPTO_BLKCIPHER, CRYPT_AES and CRYPT_ECB as built in for you too.

RF kill switch is under:

Code:

Networking support -->
   RF switch subsystem support


Hope this helps people with the same problem.

-William
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Budoka
Guru
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Joined: 03 Jun 2012
Posts: 338
Location: Tokyo, Japan

PostPosted: Mon Feb 18, 2013 4:11 am    Post subject: Reply with quote

wklam wrote:
I bumped into the very same problem. A google search brought me to this.

Here is what worked for me to have bluetooth-subsystem-support built-in to the kernel instead of a module.

If you look at:

Code:

/usr/src/linux/net/bluetooth/Kconfig


This is where it has all the dependency listed for kernel menuconfig for bluetooth.

So on bluetooth subsystem support "BT" It says:

Code:


menuconfig BT
        tristate "Bluetooth subsystem support"
        depends on NET && !S390
        depends on RFKILL || !RFKILL
        select CRC16
        select CRYPTO
        select CRYPTO_BLKCIPHER
        select CRYPTO_AES
        select CRYPTO_ECB
...


Please note that the logical operations like "||" and "&&" and "!" are not simple logical operations just like in programming languages. They are actually calculation to refer to 0 (N), 1 (Y) or 2 (M).

If you are curious what these operators actually mean:

http://www.kernel.org/doc/Documentation/kbuild/kconfig-language.txt

For the above BT, it means, it depends on
1) (NET) Networking, and
2) (RFKILL) RF switch subsystem support (RF kill switch)

Once you select RFKILL and NET as built-in, then it will go ahead and select CRC16, CRYPTO, CRYPTO_BLKCIPHER, CRYPT_AES and CRYPT_ECB as built in for you too.

RF kill switch is under:

Code:

Networking support -->
   RF switch subsystem support


Hope this helps people with the same problem.

-William


I had this same problem. I was able to find and select rfkill,
Quote:
--- RF switch subsystem support │ │
│ │ [*] RF switch input support │ │
│ │ <*> Generic rfkill regulator driver


and this allowed me to then select bluetooth subsystem support,
Quote:
--- Bluetooth subsystem support │ │
│ │ <M> RFCOMM protocol support │ │
│ │ [*] RFCOMM TTY support │ │
│ │ <M> BNEP protocol support │ │
│ │ [*] Multicast filter support │ │
│ │ [*] Protocol filter support │ │
│ │ <M> HIDP protocol support │ │
│ │ Bluetooth device drivers --->


but I can't find where NET is located in the kernel config. Can you point me to it? My Bluetooth radio is still not detected and want to make sure I have the kernel compiled correctly before starting a new thread to deal with it.
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wklam
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Joined: 09 May 2005
Posts: 40

PostPosted: Mon Feb 18, 2013 4:57 am    Post subject: Reply with quote

Quote:
but I can't find where NET is located in the kernel config. Can you point me to it? My Bluetooth radio is still not detected and want to make sure I have the kernel compiled correctly before starting a new thread to deal with it.


NET was referring to Networking. In the following figure, at the top.

http://sourceforge.net/apps/trac/wdtvtools/attachment/wiki/Tutorials/CompileKernelModulesForTheWDTV/kernel-menuconfig-bt-network.png

Make sure it is a star [*]. If you start from the kernel at portage, it should be enabled by default.

It should be at the top-level "Networking" at menuconfig.

http://sourceforge.net/apps/trac/wdtvtools/raw-attachment/wiki/Tutorials/CompileKernelModulesForTheWDTV/kernel-menuconfig-main.png

Hope this helps.

-William
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Budoka
Guru
Guru


Joined: 03 Jun 2012
Posts: 338
Location: Tokyo, Japan

PostPosted: Mon Feb 18, 2013 5:12 am    Post subject: Reply with quote

wklam wrote:
Quote:
but I can't find where NET is located in the kernel config. Can you point me to it? My Bluetooth radio is still not detected and want to make sure I have the kernel compiled correctly before starting a new thread to deal with it.


NET was referring to Networking. In the following figure, at the top.

http://sourceforge.net/apps/trac/wdtvtools/attachment/wiki/Tutorials/CompileKernelModulesForTheWDTV/kernel-menuconfig-bt-network.png

Make sure it is a star [*]. If you start from the kernel at portage, it should be enabled by default.

It should be at the top-level "Networking" at menuconfig.

http://sourceforge.net/apps/trac/wdtvtools/raw-attachment/wiki/Tutorials/CompileKernelModulesForTheWDTV/kernel-menuconfig-main.png

Hope this helps.

-William


Thanks. Yes it does have a star next to it. Anyway, I will start another thread to try to sort out my bluetooth issue.
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