From 42199256afa566acd0a6935d3e772773d1dc18ef Mon Sep 17 00:00:00 2001
From: tofraa <torfaas@gmail.com>
Date: Sat, 2 Jul 2022 06:09:30 -0400
Subject: FindOpenSSL: Document use of pkg-config

Issue: #17548
---
 Modules/FindOpenSSL.cmake | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Modules/FindOpenSSL.cmake b/Modules/FindOpenSSL.cmake
index 6f80d8e..352c4cc 100644
--- a/Modules/FindOpenSSL.cmake
+++ b/Modules/FindOpenSSL.cmake
@@ -104,6 +104,11 @@ The following variables may be set to control search behavior:
   .. versionadded:: 3.5
 
   Set to ``TRUE`` to choose the MT version of the lib.
+
+``ENV{PKG_CONFIG_PATH}``
+  On UNIX-like systems, ``pkg-config`` is used to locate the system OpenSSL.
+  Set the ``PKG_CONFIG_PATH`` environment varialbe to look in alternate
+  locations.  Useful on multi-lib systems.
 #]=======================================================================]
 
 macro(_OpenSSL_test_and_find_dependencies ssl_library crypto_library)
-- 
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