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[mirror_edk2.git] / StdLib / Include / stdarg.h

diff --git a/StdLib/Include/stdarg.h b/StdLib/Include/stdarg.h
index 226e3156951bdc0dd63524f47f4a72113aeb73cc..b966a5ce2b24016d43e96d2afa5c56884028e20a 100644 (file)
--- a/StdLib/Include/stdarg.h
+++ b/StdLib/Include/stdarg.h
@@ -41,10 +41,12 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 \r
 /** The type va_list is a type suitable for holding information needed by the\r
     macros va_start, va_arg, and va_end.\r
-\r
-    This implementation aliases va_list to VA_LIST, declared in MdePkg/Base.h.\r
 **/\r
+#if defined(__GNUC__)\r
+typedef __builtin_va_list   va_list;\r
+#else\r
 #define va_list   VA_LIST\r
+#endif\r
 \r
 /** The va_start macro shall be invoked before any access to the unnamed arguments.\r
     The va_start macro initializes ap for subsequent use by va_arg and va_end.\r
@@ -63,11 +65,12 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
                     is not compatible with the type that results after\r
                     application of the default argument promotions, the\r
                     behavior is undefined.\r
-\r
-    This implementation aliases va_start to VA_START, declared in MdePkg/Base.h.\r
 **/\r
-//#define va_start(ap, ParamN)    VA_START(ap, ParamN)\r
+#if defined(__GNUC__)\r
+#define va_start    __builtin_va_start\r
+#else\r
 #define va_start    VA_START\r
+#endif\r
 \r
 /** The va_arg macro expands to an expression that has the type and value of\r
     the next argument in the call.  The parameter ap shall be the same as the\r
@@ -90,11 +93,12 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
                   va_start macro returns the value of the argument after that\r
                   specified by paramN.  Successive invocations return the values\r
                   of the remaining arguments in succession.\r
-\r
-    This implementation aliases va_arg to VA_ARG, declared in MdePkg/Base.h.\r
 **/\r
-//#define va_arg(ap, type)        VA_ARG(ap, type)\r
+#if defined(__GNUC__)\r
+#define va_arg        __builtin_va_arg\r
+#else\r
 #define va_arg        VA_ARG\r
+#endif\r
 \r
 /** The va_end macro facillitates a normal return from the function whose\r
     variable argument list was referred to by the expansion of va_start that\r
@@ -109,13 +113,18 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 \r
     @param  ap    An object of type va_list, initialized by a prior\r
                   invocation of va_start, that will no longer be referenced.\r
-\r
-    This implementation aliases va_end to VA_END, declared in MdePkg/Base.h.\r
 **/\r
-//#define va_end(ap)              VA_END(ap)\r
+#if defined(__GNUC__)\r
+#define va_end              __builtin_va_end\r
+#else\r
 #define va_end              VA_END\r
+#endif\r
 \r
 /** For BSD compatibility. **/\r
+#if defined(__GNUC__)\r
+#define va_copy         __builtin_va_copy\r
+#else\r
 #define va_copy(s,d)      (s) = (d)\r
+#endif\r
 \r
 #endif  /* _STDARG_H */\r