Merge topic 'bootstrap-libuv-macos'

e771330dd4 bootstrap: Fix libuv target platform conditions on macOS

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !5044
diff --git a/Utilities/cmlibuv/include/uv/unix.h b/Utilities/cmlibuv/include/uv/unix.h
index 82778ff..f30562e 100644
--- a/Utilities/cmlibuv/include/uv/unix.h
+++ b/Utilities/cmlibuv/include/uv/unix.h
@@ -47,6 +47,9 @@
 
 #ifdef CMAKE_BOOTSTRAP
 # include "posix.h"
+# if defined(__APPLE__)
+#  include <TargetConditionals.h>
+# endif
 #elif defined(__linux__)
 # include "linux.h"
 #elif defined (__MVS__)