Made use of std::numeric_limits::is_iec559

src/compile_time_tests/ieee_754.cpp

@@ -1,18 +1,11 @@
-#include <cstdint>
+#include <limits>
 
 // This test verifies that floating point numbers are represented in the IEEE 754 format.
 // Wesnoth requires that.
 int main()
 {
-	union
-	{
-		double floating_point_number;
-		uint64_t integer;
-	} number;
-
-	number.floating_point_number = 1.2;
-	bool match = (number.integer == 0x3FF3333333333333ull);
 	// Return code zero means success.
 	// Thus, check that the bit representation is *not* what IEEE 754 specifies.
+	bool match = std::numeric_limits<double>::is_iec559;
 	return !match;
 }