GCC added __sync_synchronize() in 4.4.0 but it was broken on ARM until 4.4.3, see the GCC bug report for more details :
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=42263 Signed-off-by: Michael Jeanson <mjean...@efficios.com> Change-Id: I629e3c8b4baaccb34b2311e220f30d0ad8b69a19 --- include/urcu/arch/arm.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/include/urcu/arch/arm.h b/include/urcu/arch/arm.h index 5d1c608..e904b06 100644 --- a/include/urcu/arch/arm.h +++ b/include/urcu/arch/arm.h @@ -70,6 +70,15 @@ extern "C" { # endif #endif +/* + * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=42263 + */ +#ifdef URCU_GCC_VERSION +# if URCU_GCC_VERSION >= 40400 && URCU_GCC_VERSION <= 40402 +# error Your gcc version has a non-functional __sync_synchronize() +# endif +#endif + #ifdef __cplusplus } #endif -- 2.29.2 _______________________________________________ lttng-dev mailing list lttng-dev@lists.lttng.org https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
