From 133063fc68729b424468fd88f993a9cf35814660 Mon Sep 17 00:00:00 2001
From: Ferenc Gerlits <fgerlits@gmail.com>
Date: Mon, 10 Jan 2022 16:46:10 +0100
Subject: [PATCH] cmake: fix compilation with OpenSSL subproject

https://github.com/warmcat/libwebsockets/pull/2535
---
 lib/tls/CMakeLists.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/tls/CMakeLists.txt b/lib/tls/CMakeLists.txt
index 3ab5524b0..70cbb68a4 100644
--- a/lib/tls/CMakeLists.txt
+++ b/lib/tls/CMakeLists.txt
@@ -254,6 +254,10 @@ if (LWS_WITH_SSL)
 	endif()
 
 	if (NOT chose_ssl)
+		if (OPENSSL_FOUND AND "${OPENSSL_INCLUDE_DIRS}" STREQUAL "")
+			set(OPENSSL_INCLUDE_DIRS "${OPENSSL_INCLUDE_DIR}")
+		endif()
+
 		if (NOT OPENSSL_FOUND AND NOT LWS_WITH_BORINGSSL)
 			# TODO: Add support for STATIC also.
 			if (NOT LWS_PLAT_FREERTOS)