From a51b90a31399a8826e590da8e327bd65dd29e5a4 Mon Sep 17 00:00:00 2001
From: Barry Warsaw <barry@python.org>
Date: Fri, 6 Oct 2017 09:53:48 -0400
Subject: Document Py_GETENV() (#3890)

---
 Doc/c-api/intro.rst | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Doc/c-api/intro.rst b/Doc/c-api/intro.rst
index 4942b1a..e654c4c 100644
--- a/Doc/c-api/intro.rst
+++ b/Doc/c-api/intro.rst
@@ -132,6 +132,11 @@ complete listing.
    Argument must be a character or an integer in the range [-128, 127] or [0,
    255].  This macro returns ``c`` cast to an ``unsigned char``.
 
+.. c:macro:: Py_GETENV(s)
+
+   Like ``getenv(s)``, but returns *NULL* if :option:`-E` was passed on the
+   command line (i.e. if ``Py_IgnoreEnvironmentFlag`` is set).
+
 
 .. _api-objects:
 
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