Reduce dependencies, added scalar EXT extensions

test/ext/ext_scalar_float_sized.cpp

@@ -0,0 +1,37 @@
+#include <glm/ext/scalar_float_sized.hpp>
+
+GLM_STATIC_ASSERT(sizeof(glm::float32) == 4, "float32 size isn't 4 bytes on this platform");
+
+#ifndef GLM_FORCE_SINGLE_ONLY
+	GLM_STATIC_ASSERT(sizeof(glm::float64) == 8, "float64 size isn't 8 bytes on this platform");
+#endif//GLM_FORCE_SINGLE_ONLY
+
+static int test_float_size()
+{
+	int Error = 0;
+
+	Error += sizeof(glm::float32) == sizeof(float) ? 0 : 1;
+	Error += sizeof(glm::float64) == sizeof(double) ? 0 : 1;
+
+	return Error;
+}
+
+static int test_float_precision()
+{
+	int Error = 0;
+
+	Error += sizeof(float) <= sizeof(double) ? 0 : 1;
+	Error += sizeof(glm::float32) < sizeof(glm::float64) ? 0 : 1;
+
+	return Error;
+}
+
+int main()
+{
+	int Error = 0;
+
+	Error += test_float_size();
+	Error += test_float_precision();
+
+	return Error;
+}