[Buildroot] [PATCH 1/1] xerces: enable threads if available

[Matthew Weber]

Fabrice,

On Sat, Oct 6, 2018 at 3:13 PM Fabrice Fontaine
<fontaine.fabrice at gmail.com> wrote:
>
> Signed-off-by: Fabrice Fontaine <fontaine.fabrice at gmail.com>

Reviewed-by: Matt Weber <matthew.weber at rockwellcollins.com>

> ---
>  package/xerces/xerces.mk | 10 +++++++---
>  1 file changed, 7 insertions(+), 3 deletions(-)
>
> diff --git a/package/xerces/xerces.mk b/package/xerces/xerces.mk
> index a25641fb45..da088d8e1c 100644
> --- a/package/xerces/xerces.mk
> +++ b/package/xerces/xerces.mk
> @@ -10,9 +10,7 @@ XERCES_SITE = http://archive.apache.org/dist/xerces/c/3/sources
>  XERCES_LICENSE = Apache-2.0
>  XERCES_LICENSE_FILES = LICENSE
>  XERCES_INSTALL_STAGING = YES
> -XERCES_CONF_OPTS = \
> -       --disable-threads \

I went back and checked the history on why threading was disabled by
default.  It looks like there wasn't a specific reason.  Just a
package bump and change of configuration style.
https://git.busybox.net/buildroot/commit/package/xerces/xerces.mk?id=324f61f7982c64ebd4a457467b33a6984bd8a584

> +ifeq ($(BR2_TOOLCHAIN_HAS_THREADS),y)
> +XERCES_CONF_OPTS += --enable-threads
> +else
> +XERCES_CONF_OPTS += --disable-threads
> +endif
> +

Does this yield a pretty good performance increase?  Wonder how they
bound the thread number to use on target when it runs.

Matt