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-rw-r--r--src/corelib/kernel/qcore_unix_p.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/corelib/kernel/qcore_unix_p.h b/src/corelib/kernel/qcore_unix_p.h
index 1f3fe39..61d8401 100644
--- a/src/corelib/kernel/qcore_unix_p.h
+++ b/src/corelib/kernel/qcore_unix_p.h
@@ -71,7 +71,7 @@ struct sockaddr;
QT_BEGIN_NAMESPACE
-#if defined(Q_OS_LINUX) && defined(__GLIBC__) && (__GLIBC__ * 0x100 + __GLIBC_MINOR__) >= 0x0204
+#if defined(Q_OS_LINUX) && defined(O_CLOEXEC) && defined(__GLIBC__) && (__GLIBC__ * 0x100 + __GLIBC_MINOR__) >= 0x0204
// Linux supports thread-safe FD_CLOEXEC
# define QT_UNIX_SUPPORTS_THREADSAFE_CLOEXEC 1