Fix a -Wunused-function warning with win/clang.

src/trusted/platform_qualify/arch/x86/vcpuid.c

Index: src/trusted/platform_qualify/arch/x86/vcpuid.c
diff --git a/src/trusted/platform_qualify/arch/x86/vcpuid.c b/src/trusted/platform_qualify/arch/x86/vcpuid.c
index 9d123062bbedd88c67bd8fa76ee27f8f7b592002..93c1f5b17a9f471a3f3cc9cb1985d1cde19809cc 100644
--- a/src/trusted/platform_qualify/arch/x86/vcpuid.c
+++ b/src/trusted/platform_qualify/arch/x86/vcpuid.c
@@ -490,6 +490,7 @@ static int DoTest(int (*thetest)(void), const char *s) {
 # error Please specify platform as NACL_LINUX, NACL_OSX or NACL_WINDOWS
 #endif
 
+#if !(NACL_WINDOWS && (NACL_BUILD_SUBARCH == 64))

[Roland McGrath, 2015/12/05 11:07:46]

It would be better to factor out the caller code that is under the same #if
condition below into a subroutine that can go inside this same #if block, with a
stub function in the #else block so there does not need to be yet another
instance of this same #if condition below.

[Nico, 2015/12/05 15:35:38]

Done, but seems somewhat out of scope for this particular cl maybe.

 static int DoCPUFeatureTest(NaClCPUFeaturesX86 *features,
                             NaClCPUFeatureX86ID id,
                             int (*thetest)(void)) {
@@ -498,6 +499,7 @@ static int DoCPUFeatureTest(NaClCPUFeaturesX86 *features,
   else
     return 0;
 }
+#endif  /* 64-bit Windows */
 
 static void PrintFail(const char *why) {
   fprintf(stderr, "ERROR: %s.\n", why);