Fixed use of undeclared identifier '__cpuidex' error on mingw

thirdparty/embree/common/sys/sysinfo.cpp

@@ -295,7 +295,7 @@ namespace embree
     if (nIds >= 1) __cpuid (cpuid_leaf_1,0x00000001);
 #if _WIN32
 #if _MSC_VER && (_MSC_FULL_VER < 160040219)
-#else
+#elif defined(_MSC_VER)
     if (nIds >= 7) __cpuidex(cpuid_leaf_7,0x00000007,0);
 #endif
 #else

thirdparty/embree/patches/mingw-no-cpuidex.patch

@@ -0,0 +1,13 @@
+diff --git a/thirdparty/embree/common/sys/sysinfo.cpp b/thirdparty/embree/common/sys/sysinfo.cpp
+index d01eab3c9d..4ecab05265 100644
+--- a/thirdparty/embree/common/sys/sysinfo.cpp
++++ b/thirdparty/embree/common/sys/sysinfo.cpp
+@@ -295,7 +295,7 @@ namespace embree
+     if (nIds >= 1) __cpuid (cpuid_leaf_1,0x00000001);
+ #if _WIN32
+ #if _MSC_VER && (_MSC_FULL_VER < 160040219)
+-#else
++#elif defined(_MSC_VER)
+     if (nIds >= 7) __cpuidex(cpuid_leaf_7,0x00000007,0);
+ #endif
+ #else