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boost: fix build problem by always building a threaded version

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Boost normally allows to build a non-threaded variant by passing
threading=single or a multi-threaded variant by passing
threading=multi.

Unfortunately, the build of threading=single doesn't seem to work any
more, due to bizarre things in the build system. We get "duplicate
target" errors, that according to
http://lists.boost.org/boost-build/2012/11/26582.php should appear if
we ask for both threading=single,multi. But it seems to happen even in
the threading=single case.

Since Boost is such a big C++ beast, it probably doesn't make much
sense to try to support it on toolchains that don't have thread
support. So, we make the boost package depend on thread support. If
someone cares enough in getting Boost to work in a non-threaded
environment, then we can always revert back.

Note that the boost package has no reverse dependencies in Buildroot,
so we don't need to propagate this new dependency anywhere.

Fixes:

  http://autobuild.buildroot.org/results/439e72ac74c8058f30977e6abc39acd6379a17d3/build-end.log

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 2013-01-15 00:45:26 +00:00 committed by Peter Korsgaard
parent 2a78641583
commit 87dfeb10ad
2 changed files with 8 additions and 11 deletions
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15
package/boost/Config.in
View File

@ -1,10 +1,14 @@
comment "boost requires a toolchain with C++ and large file support enabled"
depends on !BR2_INSTALL_LIBSTDCPP || !BR2_LARGEFILE
comment "boost requires a toolchain with C++, large file and thread support enabled"
depends on !BR2_INSTALL_LIBSTDCPP || !BR2_LARGEFILE || !BR2_TOOLCHAIN_HAS_THREADS
config BR2_PACKAGE_BOOST
bool "boost"
depends on BR2_INSTALL_LIBSTDCPP
depends on BR2_LARGEFILE
# Boost could theorically be built with threading=single, but
# that unfortunately doesn't work. Until someone fixes that,
# let's depend on threads.
depends on BR2_TOOLCHAIN_HAS_THREADS
select BR2_PACKAGE_BZIP2
select BR2_PACKAGE_ZLIB
help
@ -14,12 +18,6 @@ config BR2_PACKAGE_BOOST
if BR2_PACKAGE_BOOST
config BR2_PACKAGE_BOOST_MULTITHREADED
depends on BR2_TOOLCHAIN_HAS_THREADS
bool "boost-multithreaded"
help
Build the boost libraries as multithreaded
config BR2_PACKAGE_BOOST_CHRONO
bool "boost-chrono"
@ -76,7 +74,6 @@ config BR2_PACKAGE_BOOST_TEST
bool "boost-test"
config BR2_PACKAGE_BOOST_THREAD
depends on BR2_TOOLCHAIN_HAS_THREADS
bool "boost-thread"
config BR2_PACKAGE_BOOST_TIMER

4
package/boost/boost.mk
View File

@ -46,10 +46,10 @@ BOOST_FLAGS += --without-icu
endif
BOOST_OPT += toolset=gcc \
threading=multi \
variant=$(if $(BR2_ENABLE_DEBUG),debug,release) \
link=$(if $(BR2_PREFER_STATIC_LIB),static,shared) \
runtime-link=$(if $(BR2_PREFER_STATIC_LIB),static,shared) \
threading=$(if $(BR2_PACKAGE_BOOST_MULTITHREADED),multi,single)
runtime-link=$(if $(BR2_PREFER_STATIC_LIB),static,shared)
ifeq ($(BR2_PACKAGE_BOOST_LOCALE),y)
ifeq ($(BR2_TOOLCHAIN_BUILDROOT)$(BR2_TOOLCHAIN_EXTERNAL_UCLIBC)$(BR2_TOOLCHAIN_CTNG_uClibc),y)