[4.8] Disable warning: the mangling of <va_list> has changed in GCC 4.4

Please see commit message of the same fix in previous GCC
  GCC 4.7 3800bda255b20023e993ed786674f70c909d60b5
  GCC 4.6 a9fcd9b1ecb8954f67738a94b8553ab234d6def5
  GCC 4.4.3 329ca6fa5d9972ad6dad8387036b4dbe9cfa1f27

Change-Id: I288f349d2140918babf3a872728da02c5706a971

1 files changed, 23 insertions, 1 deletions

diff --git a/gcc-4.8/gcc/config/arm/arm.c b/gcc-4.8/gcc/config/arm/arm.c
index ca367608c..2077b97c9 100644
--- a/gcc-4.8/gcc/config/arm/arm.c
+++ b/gcc-4.8/gcc/config/arm/arm.c
@@ -25902,7 +25902,29 @@ arm_mangle_type (const_tree type)
      has to be managled as if it is in the "std" namespace.  */
   if (TARGET_AAPCS_BASED
       && lang_hooks.types_compatible_p (CONST_CAST_TREE (type), va_list_type))
-    return "St9__va_list";
+    {
+  /* Disable this obsolete warning for Android, because none of the exposed APIs
+     by NDK is impacted by this change of ARM ABI. This warning can be triggered
+     very easily by compiling the following code using arm-linux-androideabi-g++:
+
+         typedef __builtin_va_list __gnuc_va_list;
+         typedef __gnuc_va_list va_list;
+         void foo(va_list v) { }
+
+     We could advise developer to add "-Wno-psabi", but doing so also categorically
+     deny other cases guarded by "warn_psabi".  Hence the decision to disable it
+     case by case here.
+
+      static bool warned;
+      if (!warned && warn_psabi && !in_system_header)
+	{
+	  warned = true;
+	  inform (input_location,
+		  "the mangling of %<va_list%> has changed in GCC 4.4");
+	}
+   */
+      return "St9__va_list";
+    }
 
   /* Half-precision float.  */
   if (TREE_CODE (type) == REAL_TYPE && TYPE_PRECISION (type) == 16)