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-rw-r--r--docs/users_guide/8.12.1-notes.rst6
1 files changed, 6 insertions, 0 deletions
diff --git a/docs/users_guide/8.12.1-notes.rst b/docs/users_guide/8.12.1-notes.rst
index bc8450417f..0117b537d9 100644
--- a/docs/users_guide/8.12.1-notes.rst
+++ b/docs/users_guide/8.12.1-notes.rst
@@ -244,6 +244,12 @@ Arrow notation
Build system
~~~~~~~~~~~~
+Bootstrapping requirements
+--------------------------
+
+- GHC now requires a C compiler which supports
+ ``__atomic_op_n`` builtins. This raises the requirement for GCC to 4.7.
+
Included libraries
------------------