[ReleaseProcess] Document requirement to set MACOSX_DEPLOYMENT_TARGET
llvm-svn: 373356
diff --git a/llvm/docs/ReleaseProcess.rst b/llvm/docs/ReleaseProcess.rst
index 5822360..0cd455f 100644
--- a/llvm/docs/ReleaseProcess.rst
+++ b/llvm/docs/ReleaseProcess.rst
@@ -90,6 +90,9 @@
* On the final candidate you just need Release builds, and that's the binary
directory you'll have to pack.
+* On macOS, you must export ``MACOSX_DEPLOYMENT_TARGET=10.9`` before running
+ the script.
+
This script builds three phases of Clang+LLVM twice each (Release and
Release+Asserts), so use screen or nohup to avoid headaches, since it'll take
a long time.