Merge topic 'FindOpenSSL-trust-root-dir' into release-3.27

791d4fd350 FindOpenSSL: Prefer OPENSSL_ROOT_DIR only if non-empty

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !8643

Modules/FindOpenSSL.cmake

diff --git a/Modules/FindOpenSSL.cmake b/Modules/FindOpenSSL.cmake
index 426d00d..10282a0 100644
--- a/Modules/FindOpenSSL.cmake
+++ b/Modules/FindOpenSSL.cmake
@@ -230,7 +230,7 @@
   set(_OPENSSL_FIND_PATH_SUFFIX "include")
 endif()
 
-if ((DEFINED OPENSSL_ROOT_DIR) OR (DEFINED ENV{OPENSSL_ROOT_DIR}))
+if (OPENSSL_ROOT_DIR OR NOT "$ENV{OPENSSL_ROOT_DIR}" STREQUAL "")
   set(_OPENSSL_ROOT_HINTS HINTS ${OPENSSL_ROOT_DIR} ENV OPENSSL_ROOT_DIR)
   set(_OPENSSL_ROOT_PATHS NO_DEFAULT_PATH)
 elseif (MSVC)