portability: global structs cant be statically initialized with exter…

…nal symbols

quickjs.c

@@ -42193,14 +42193,29 @@ static JSValue js_math_random(JSContext *ctx, JSValueConst this_val,
     return __JS_NewFloat64(ctx, u.d - 1.0);
 }
 
+static double qjs_ceil(double x)
+{
+    return ceil(x);
+}
+
+static double qjs_floor(double x)
+{
+    return floor(x);
+}
+
+static double qjs_sqrt(double x)
+{
+    return sqrt(x);
+}
+
 static const JSCFunctionListEntry js_math_funcs[] = {
     JS_CFUNC_MAGIC_DEF("min", 2, js_math_min_max, 0 ),
     JS_CFUNC_MAGIC_DEF("max", 2, js_math_min_max, 1 ),
     JS_CFUNC_SPECIAL_DEF("abs", 1, f_f, fabs ),
-    JS_CFUNC_SPECIAL_DEF("floor", 1, f_f, floor ),
-    JS_CFUNC_SPECIAL_DEF("ceil", 1, f_f, ceil ),
+    JS_CFUNC_SPECIAL_DEF("floor", 1, f_f, qjs_floor ),
+    JS_CFUNC_SPECIAL_DEF("ceil", 1, f_f, qjs_ceil ),
     JS_CFUNC_SPECIAL_DEF("round", 1, f_f, js_math_round ),
-    JS_CFUNC_SPECIAL_DEF("sqrt", 1, f_f, sqrt ),
+    JS_CFUNC_SPECIAL_DEF("sqrt", 1, f_f, qjs_sqrt ),
 
     JS_CFUNC_SPECIAL_DEF("acos", 1, f_f, acos ),
     JS_CFUNC_SPECIAL_DEF("asin", 1, f_f, asin ),