From 17ae4e1befb0e9a81b70e1792a4ae50a2fee8183 Mon Sep 17 00:00:00 2001
From: Ben Boeckel <ben.boeckel@kitware.com>
Date: Sat, 13 Feb 2021 08:55:03 -0500
Subject: FindPNG: only mark used variables as advanced

The `PNG_LIBRARY` variable is an output and not a cache variable.

Fixes some CMP0102 warnings.
---
 Modules/FindPNG.cmake | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/Modules/FindPNG.cmake b/Modules/FindPNG.cmake
index 51f2c7d..94d15db 100644
--- a/Modules/FindPNG.cmake
+++ b/Modules/FindPNG.cmake
@@ -55,6 +55,7 @@ find_package(ZLIB ${_FIND_ZLIB_ARG})
 
 if(ZLIB_FOUND)
   find_path(PNG_PNG_INCLUDE_DIR png.h PATH_SUFFIXES include/libpng)
+  mark_as_advanced(PNG_PNG_INCLUDE_DIR)
 
   list(APPEND PNG_NAMES png libpng)
   unset(PNG_NAMES_DEBUG)
@@ -158,5 +159,3 @@ include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
 find_package_handle_standard_args(PNG
                                   REQUIRED_VARS PNG_LIBRARY PNG_PNG_INCLUDE_DIR
                                   VERSION_VAR PNG_VERSION_STRING)
-
-mark_as_advanced(PNG_PNG_INCLUDE_DIR PNG_LIBRARY )
-- 
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