Add a test for bug 827866

debian/qualify-clang.sh

@@ -76,6 +76,15 @@ fi
 echo '#include <emmintrin.h>' > foo.cc
 clang++-$VERSION -c foo.cc
 
+# bug 827866
+echo 'bool testAndSet(void *atomic) {
+    return __atomic_test_and_set(atomic, __ATOMIC_SEQ_CST);
+}'> foo.cpp
+clang++-$VERSION -c -target aarch64-linux-gnu foo.cpp
+if ! file foo.o 2>&1 | grep -q "aarch64"; then
+    echo "Could not find the string 'aarch64' in the output of file"
+    exit 42
+fi
 echo '
 #include <string.h>
 int