add MSVC 16 compatibility

src/vm/interp/vm_tgc_c.cpp

@@ -30,23 +30,21 @@
  *
  *******************************************************************************/
 
-#include "../fp_functions.h"
-#include <iss/arch/tgc_c.h>
-#include <iss/arch/riscv_hart_m_p.h>
+// clang-format off
 #include <iss/debugger/gdb_session.h>
 #include <iss/debugger/server.h>
 #include <iss/iss.h>
+#include <iss/arch/tgc_c.h>
+#include <iss/arch/riscv_hart_m_p.h>
 #include <iss/interp/vm_base.h>
+#include "../fp_functions.h"
 #include <util/logging.h>
 #include <sstream>
-
-#ifndef FMT_HEADER_ONLY
-#define FMT_HEADER_ONLY
-#endif
 #include <fmt/format.h>
 
 #include <array>
 #include <iss/debugger/riscv_target_adapter.h>
+// clang-format on
 
 namespace iss {
 namespace interp {