[OE-core] [PATCH] db: disable the ARM assembler mutex code

[Khem Raj]

On 11/4/16 2:07 AM, Li Zhou wrote:
> The swpb in macro MUTEX_SET will cause "undefined instruction" error
> on the new arm arches which don't support this assembly instruction
> any more. If use ldrex/strex to replace swpb, the old arm arches don't
> support them. So to avoid this issue, just disable the ARM assembler
> mutex code, and use the default pthreads mutex.
> 
> Signed-off-by: Li Zhou <li.zhou at windriver.com>
> ---
>  meta/recipes-support/db/db_6.0.30.bb | 9 ---------
>  1 file changed, 9 deletions(-)
> 
> diff --git a/meta/recipes-support/db/db_6.0.30.bb b/meta/recipes-support/db/db_6.0.30.bb
> index 50a469b..2d08b5e 100644
> --- a/meta/recipes-support/db/db_6.0.30.bb
> +++ b/meta/recipes-support/db/db_6.0.30.bb
> @@ -74,15 +74,6 @@ DB6_CONFIG ?= "--enable-o_direct --disable-cryptography --disable-queue --disabl
>  
>  EXTRA_OECONF = "${DB6_CONFIG} --enable-shared --enable-cxx --with-sysroot"
>  
> -# Override the MUTEX setting here, the POSIX library is
> -# the default - "POSIX/pthreads/library".
> -# Don't ignore the nice SWP instruction on the ARM:
> -# These enable the ARM assembler mutex code
> -ARM_MUTEX = "--with-mutex=ARM/gcc-assembly"
> -MUTEX = ""
> -MUTEX_arm = "${ARM_MUTEX}"
> -MUTEX_armeb = "${ARM_MUTEX}"
> -EXTRA_OECONF += "${MUTEX}"

it would be good to keep this for older < armv5 arches

>  EXTRA_OEMAKE_class-target = "LIBTOOL=${STAGING_BINDIR_CROSS}/${HOST_SYS}-libtool"
>  
>  # Cancel the site stuff - it's set for db3 and destroys the
> 

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