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-rw-r--r--site/dev/contrib/c++11.md4
1 files changed, 3 insertions, 1 deletions
diff --git a/site/dev/contrib/c++11.md b/site/dev/contrib/c++11.md
index 1854feb3b6..432ad88f3a 100644
--- a/site/dev/contrib/c++11.md
+++ b/site/dev/contrib/c++11.md
@@ -24,7 +24,9 @@ internal Google projects.
Chrome builds with a recent Clang on Mac and Linux and with a recent MSVC on
Windows. These toolchains are new enough to not be the weak link to use any
-C++11 language feature.
+C++11 language feature. Chromium, however, builds against libstdc++4.6.4
+(STL and runtime) on Linux. This precludes direct use of a number of type
+traits.
Chrome intentionally disables thread-safe initialization of static variables,
so we cannot rely on that. Our bots disable this too, so keep an eye on TSAN.