add into beam_search.cc test=develop (#2506)

e8ea4a56 · huzhiqiang · GitHub · 1fa9d2e8 · e8ea4a56
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lite/backends/x86/math/beam_search.cc lite/backends/x86/math/beam_search.cc +1 -0

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--- a/lite/backends/x86/math/beam_search.cc
+++ b/lite/backends/x86/math/beam_search.cc
@@ -14,6 +14,7 @@ limitations under the License. */
 #include "lite/backends/x86/math/beam_search.h"
 #include <algorithm>
+#include <cmath>
 #include <map>
 #include "lite/fluid/lod.h"