From 7611b3476856ac9b949840fb826fcac4d6e9c3e5 Mon Sep 17 00:00:00 2001
From: Davis King <davis@dlib.net>
Date: Fri, 15 Mar 2019 08:28:12 -0400
Subject: [PATCH] Set png include paths for test.

---
 dlib/cmake_utils/test_for_libpng/CMakeLists.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/dlib/cmake_utils/test_for_libpng/CMakeLists.txt b/dlib/cmake_utils/test_for_libpng/CMakeLists.txt
index 0f504f141..65cd85a4d 100644
--- a/dlib/cmake_utils/test_for_libpng/CMakeLists.txt
+++ b/dlib/cmake_utils/test_for_libpng/CMakeLists.txt
@@ -4,6 +4,7 @@ project(test_if_libpng_is_broken)
 
 find_package(PNG)
 
+include_directories(${PNG_INCLUDE_DIR})
 add_executable(libpng_test libpng_test.cpp)
 target_link_libraries(libpng_test ${PNG_LIBRARIES})