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-rw-r--r--configure.ac6
1 files changed, 6 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac
index 32764aa..758cd58 100644
--- a/configure.ac
+++ b/configure.ac
@@ -143,6 +143,12 @@ AH_TEMPLATE([AO_USE_SYNC_CAS_BUILTIN],
AH_TEMPLATE([AO_WEAK_DOUBLE_CAS_EMULATION],
[Emulate double-width CAS via pthread locking in case of no hardware \
support (only gcc/x86_64, the emulation is unsafe)])
+AH_TEMPLATE([AO_DISABLE_GCC_ATOMICS],
+ [Do not use C11 atomic intrinsics even if available])
+AH_TEMPLATE([AO_PREFER_BUILTIN_ATOMICS],
+ [Prefer C11 atomic intrinsics over assembly-based implementation \
+ even in case of inefficient implementation (do not use assembly for \
+ any atomic_ops primitive if C11/GCC atomic intrinsics available)])
AC_DEFINE(_REENTRANT, 1, [Required define if using POSIX threads.])