third_party/libyuv/README.libaom

Name: libyuv
URL: https://chromium.googlesource.com/libyuv/libyuv/
Version: dfaf7534e0e536f7e5ef8ddd7326797bd09b8622
License: BSD
License File: LICENSE

Description:
libyuv is an open source project that includes YUV conversion and scaling
functionality.

The optimized scaler in libyuv is used in multiple resolution encoder example,
which down-samples the original input video (f.g. 1280x720) a number of times
in order to encode multiple resolution bit streams.

Local Modifications:

diff --git a/third_party/libyuv/source/cpu_id.cc b/third_party/libyuv/source/cpu_id.cc
index fe89452b7..72a7fb82f 100644
--- a/third_party/libyuv/source/cpu_id.cc
+++ b/third_party/libyuv/source/cpu_id.cc
@@ -108,7 +108,7 @@ void CpuId(int eax, int ecx, int* cpu_info) {
 //  }
 // For VS2013 and earlier 32 bit, the _xgetbv(0) optimizer produces bad code.
 // https://code.google.com/p/libyuv/issues/detail?id=529
-#if defined(_M_IX86) && (_MSC_VER < 1900)
+#if defined(_M_IX86) && defined(_MSC_VER) && (_MSC_VER < 1900)
 #pragma optimize("g", off)
 #endif
 #if (defined(_M_IX86) || defined(_M_X64) || defined(__i386__) || \
@@ -129,7 +129,7 @@ int GetXCR0() {
 #define GetXCR0() 0
 #endif  // defined(_M_IX86) || defined(_M_X64) ..
 // Return optimization to previous setting.
-#if defined(_M_IX86) && (_MSC_VER < 1900)
+#if defined(_M_IX86) && defined(_MSC_VER) && (_MSC_VER < 1900)
 #pragma optimize("g", on)
 #endif