[Buildroot] [PATCH] uclibc: proper thread default on m68k and Microblaze
Yann E. MORIN
yann.morin.1998 at free.fr
Sun Aug 7 20:15:52 UTC 2016
Thomas, All,
On 2016-08-05 18:35 +0200, Thomas Petazzoni spake thusly:
> Traditionally, Buildroot has a default of enabling thread
> support. However, with the current construct of the thread choice in the
> uclibc package, the m68k and microblaze architecture end up with no
> thread support as the default.
>
> In order to avoid having to explicit a more complicated "default" value
> for the choice, we take a simple approach:
>
> - The "none" choice is moved at the end of the list, so that it is not
> selected as the default unless there is really no other thread
> implementation available.
>
> - We make NPTL the default thread implementation.
>
> - On architectures where NPTL is not available, the NPTL option will
> not be available, so Kconfig will automatically fallback to
> linuxthreads.
And to make things even more simple, why not move NPTL first, then LT,
then none, and remove the default?
Thus, when NPTL is avbailable, it is used; if not, LT is used; if not,
then none is used.
Regards,
Yann E. MORIN.
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
> ---
> package/uclibc/Config.in | 10 ++++++----
> 1 file changed, 6 insertions(+), 4 deletions(-)
>
> diff --git a/package/uclibc/Config.in b/package/uclibc/Config.in
> index 7c99195..b7714d4 100644
> --- a/package/uclibc/Config.in
> +++ b/package/uclibc/Config.in
> @@ -47,15 +47,13 @@ config BR2_TOOLCHAIN_BUILDROOT_LOCALE
>
> choice
> prompt "Thread library implementation"
> + # Use NPTL when available. If not available, kconfig will
> + # automatically fall back to linuxthreads.
> default BR2_PTHREADS_NATIVE
> - default BR2_PTHREADS if !BR2_USE_MMU
> help
> Use this option to select the thread library implementation
> that should be used in your toolchain.
>
> - config BR2_PTHREADS_NONE
> - bool "none"
> -
> config BR2_PTHREADS
> bool "linuxthreads"
> select BR2_TOOLCHAIN_HAS_THREADS
> @@ -67,6 +65,10 @@ choice
> select BR2_TOOLCHAIN_HAS_THREADS_NPTL
> depends on BR2_USE_MMU
> depends on !BR2_m68k && !BR2_microblaze
> +
> + config BR2_PTHREADS_NONE
> + bool "none"
> +
> endchoice
>
> config BR2_PTHREAD_DEBUG
> --
> 2.7.4
>
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