https://github.com/rime/librime/issues/462
https://github.com/rime/librime/pull/463
https://github.com/rime/librime/commit/57cffcd02ac70148e21ce982be834876b3df87db

--- a/src/rime/gear/script_translator.cc
+++ b/src/rime/gear/script_translator.cc
@@ -8,6 +8,7 @@
 //
 #include <algorithm>
 #include <stack>
+#include <cmath>
 #include <boost/algorithm/string/join.hpp>
 #include <boost/range/adaptor/reversed.hpp>
 #include <rime/composition.h>
--- a/src/rime/gear/table_translator.cc
+++ b/src/rime/gear/table_translator.cc
@@ -6,6 +6,7 @@
 //
 #include <boost/algorithm/string.hpp>
 #include <boost/range/adaptor/reversed.hpp>
+#include <cmath>
 #include <utf8.h>
 #include <rime/candidate.h>
 #include <rime/common.h>