linux-kernel - Re: [build bug] SCTP, net/sctp/auth.c, ./net/rxrpc/ar-key.c fails to build

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Date:	Wed, 28 Nov 2007 10:24:16 -0500
From:	Vlad Yasevich <vladislav.yasevich@...com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	linux-kernel@...r.kernel.org, David Howells <dhowells@...hat.com>,
	"David S. Miller" <davem@...emloft.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: [build bug] SCTP, net/sctp/auth.c, ./net/rxrpc/ar-key.c fails
 to build

Ingo Molnar wrote:
> * Ingo Molnar <mingo@...e.hu> wrote:
> 
>> a similar build bug happens with latest -git as well, with SCTP:
>>
>>  net/built-in.o: In function `rxrpc_destroy_s':
>>  ar-key.c:(.text+0xc5a2b): undefined reference to `crypto_free_tfm'
>>  net/built-in.o: In function `rxrpc_instantiate_s':
>>  ar-key.c:(.text+0xc5ed9): undefined reference to `crypto_alloc_base'

looks like rx-rpc should select CRYPTO as well..

>>  net/built-in.o: In function `sctp_endpoint_put':
>>  : undefined reference to `crypto_free_tfm'
>>  net/built-in.o: In function `sctp_inet_listen':
>>  : undefined reference to `crypto_free_tfm'
>>  net/built-in.o: In function `sctp_auth_destroy_hmacs':
>>  : undefined reference to `crypto_free_tfm'
>>  net/built-in.o: In function `sctp_auth_init_hmacs':
>>  : undefined reference to `crypto_alloc_base'
>>
>> this is a build regression over v2.6.23. config attached.
> 
> the patch below fix it (or rather, works it around).
>

The patch is an OK workaround, but may not yield a working SCTP.

Let me see if I can do better..

-vlad
 
> 	Ingo
> 
> ------------->
> Subject: SCTP: fix build bug
> From: Ingo Molnar <mingo@...e.hu>
> 
> fix build bug:
> 
>  net/built-in.o: In function `rxrpc_destroy_s':
>  ar-key.c:(.text+0xc5a2b): undefined reference to `crypto_free_tfm'
>  net/built-in.o: In function `rxrpc_instantiate_s':
>  ar-key.c:(.text+0xc5ed9): undefined reference to `crypto_alloc_base'
>  net/built-in.o: In function `sctp_endpoint_put':
>  : undefined reference to `crypto_free_tfm'
>  net/built-in.o: In function `sctp_inet_listen':
>  : undefined reference to `crypto_free_tfm'
>  net/built-in.o: In function `sctp_auth_destroy_hmacs':
>  : undefined reference to `crypto_free_tfm'
>  net/built-in.o: In function `sctp_auth_init_hmacs':
>  : undefined reference to `crypto_alloc_base'
> 
> Signed-off-by: Ingo Molnar <mingo@...e.hu>
> ---
>  net/sctp/Kconfig |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> Index: linux/net/sctp/Kconfig
> ===================================================================
> --- linux.orig/net/sctp/Kconfig
> +++ linux/net/sctp/Kconfig
> @@ -6,7 +6,7 @@ menuconfig IP_SCTP
>  	tristate "The SCTP Protocol (EXPERIMENTAL)"
>  	depends on INET && EXPERIMENTAL
>  	depends on IPV6 || IPV6=n
> -	select CRYPTO if SCTP_HMAC_SHA1 || SCTP_HMAC_MD5
> +	select CRYPTO
>  	select CRYPTO_HMAC if SCTP_HMAC_SHA1 || SCTP_HMAC_MD5
>  	select CRYPTO_SHA1 if SCTP_HMAC_SHA1
>  	select CRYPTO_MD5 if SCTP_HMAC_MD5
> 

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