[iQue] Define EGCS macro instead of relying on __GNUC__ (#2423)

* [iQue] Define EGCS macro instead of relying on __GNUC__

* Revert longlong.h

include/libc/stdarg.h

@@ -1,16 +1,7 @@
 #ifndef STDARG_H
 #define STDARG_H
 
-// When building with modern GCC, use the official vaarg macros to avoid warnings and possibly bad codegen.
-
-#if __GNUC__ >= 3
-
-#define va_list  __builtin_va_list
-#define va_start __builtin_va_start
-#define va_arg   __builtin_va_arg
-#define va_end   __builtin_va_end
-
-#elif defined(__sgi) /* IDO */
+#if defined(__sgi) /* IDO */
 
 #ifndef _VA_LIST_
 # define _VA_LIST_
@@ -52,7 +43,7 @@ typedef char* va_list;
 /* No cleanup processing is required for the end of a varargs list: */
 #define va_end(__list)
 
-#else /* EGCS */
+#elif defined(EGCS) /* EGCS */
 
 typedef char * __gnuc_va_list;
 
@@ -75,6 +66,14 @@ typedef char * __gnuc_va_list;
 
 typedef __gnuc_va_list va_list;
 
+#else /* Modern GCC */
+
+// When building with modern GCC, use the official vaarg macros to avoid warnings and possibly bad codegen.
+#define va_list  __builtin_va_list
+#define va_start __builtin_va_start
+#define va_arg   __builtin_va_arg
+#define va_end   __builtin_va_end
+
 #endif
 
 #endif

include/macros.h

@@ -52,10 +52,10 @@
 
 #if DEBUG_FEATURES
 #define PRINTF osSyncPrintf
+#elif defined(EGCS)
+#define PRINTF(format, args...) while (0) osSyncPrintf(format, ##args)
 #elif IDO_PRINTF_WORKAROUND
 #define PRINTF(args) (void)0
-#elif defined(__GNUC__) && __GNUC__ < 3
-#define PRINTF(format, args...) while (0) osSyncPrintf(format, ##args)
 #else
 #define PRINTF(format, ...) (void)0
 #endif