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toolchain: rework thread options

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The selection of linuxthreads, linuxthreads old or NPTL doesn't make a
lot of sense for external toolchains. So, instead, we :

 * Introduce an hidden BR2_TOOLCHAIN_HAS_THREADS option, which must be
   selected by toolchain specific options when thread support is
   available. Package needing to test thread support should use this
   option.

 * Move the none/linuxthreads/linuxthreads old/NPTL selection to
   Buildroot internal toolchain configuration.

 * Add an option in external toolchain to tell if thread support is
   available or not in the external toolchain. We assume that glibc
   without threads is not possible, as Ulrich Drepper said in
   http://sourceware.org/ml/libc-alpha/2005-08/msg00091.html

ffmpeg, dmalloc and openvpn are fixed to use the new
BR2_TOOLCHAIN_HAS_THREADS option. For openvpn, --enable-threads=posix
is no longer used, as the configure script doesn't even understand
this option.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
This commit is contained in:
Thomas Petazzoni
2010-12-13 17:27:44 +01:00
committed by Peter Korsgaard
parent a72a670489
commit 9eaad202f1
11 changed files with 62 additions and 48 deletions
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6
package/multimedia/ffmpeg/ffmpeg.mk
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@@ -111,10 +111,10 @@ else
FFMPEG_CONF_OPT += --disable-outdevs
endif
ifeq ($(BR2_PTHREADS_NONE),y)
FFMPEG_CONF_OPT += --disable-pthreads
else
ifeq ($(BR2_TOOLCHAIN_HAS_THREADS),y)
FFMPEG_CONF_OPT += --enable-pthreads
else
FFMPEG_CONF_OPT += --disable-pthreads
endif
ifeq ($(BR2_PACKAGE_ZLIB),y)