Frontend: further document __BYTE_ORDER__
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161494 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/InitPreprocessor.cpp b/lib/Frontend/InitPreprocessor.cpp
index e8ae8e3..6b9965e 100644
--- a/lib/Frontend/InitPreprocessor.cpp
+++ b/lib/Frontend/InitPreprocessor.cpp
@@ -445,7 +445,9 @@
// Initialize target-specific preprocessor defines.
- // __BYTE_ORDER__ was added in GCC 4.6.
+ // __BYTE_ORDER__ was added in GCC 4.6. It's analogous
+ // to the macro __BYTE_ORDER (no trailing underscores)
+ // from glibc's <endian.h> header.
// We don't support the PDP-11 as a target, but include
// the define so it can still be compared against.
Builder.defineMacro("__ORDER_LITTLE_ENDIAN__", "1234");
