kumquat-buildroot/package/liburcu/Config.in

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config BR2_PACKAGE_LIBURCU_ARCH_SUPPORTS
bool
depends on BR2_arm || BR2_armeb || BR2_aarch64 || BR2_i386 || BR2_powerpc || BR2_x86_64
default y
config BR2_PACKAGE_LIBURCU
bool "liburcu"
depends on BR2_PACKAGE_LIBURCU_ARCH_SUPPORTS
depends on !BR2_TOOLCHAIN_HAS_GCC_BUG_58854 # liburcu/gcc-4.8.x bug
depends on BR2_TOOLCHAIN_HAS_THREADS
help
Userspace implementation of the Read-Copy-Update (RCU)
synchronization mechanism. This library is mainly used by
the LTTng tracing infrastructure, but can be used for other
purposes as well.
On ARM, because of bug:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58854
liburcu cannot be built using gcc 4.8.0, 4.8.1 or 4.8.2 without the
following bug fix:
http://gcc.gnu.org/viewcvs/gcc?view=revision&revision=204665
http://lttng.org/urcu
comment "liburcu needs a toolchain w/ threads"
depends on BR2_PACKAGE_LIBURCU_ARCH_SUPPORTS
depends on !BR2_TOOLCHAIN_HAS_GCC_BUG_58854 # liburcu/gcc-4.8.x bug
depends on !BR2_TOOLCHAIN_HAS_THREADS
comment "liburcu needs a toolchain not affected by GCC bug 58854"
depends on BR2_TOOLCHAIN_HAS_GCC_BUG_58854