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-rw-r--r--lib/libcxx/src/thread.cpp4
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/libcxx/src/thread.cpp b/lib/libcxx/src/thread.cpp
index 467402b6b42..d4977cd9a73 100644
--- a/lib/libcxx/src/thread.cpp
+++ b/lib/libcxx/src/thread.cpp
@@ -78,9 +78,9 @@ thread::detach()
unsigned
thread::hardware_concurrency() _NOEXCEPT
{
-#if defined(CTL_HW) && defined(HW_NCPU)
+#if defined(CTL_HW) && defined(HW_NCPUONLINE)
unsigned n;
- int mib[2] = {CTL_HW, HW_NCPU};
+ int mib[2] = {CTL_HW, HW_NCPUONLINE};
std::size_t s = sizeof(n);
sysctl(mib, 2, &n, &s, 0, 0);
return n;