From 8fb32c0a3908b6202ea895c865a08b55bbb49bca Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Kornel=20Lesi=C5=84ski?= <kornel@geekhood.net>
Date: Sat, 15 Aug 2020 17:49:12 +0100
Subject: [PATCH] Work around fussy zlib on macOS

---
 CMakeLists.txt | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6596f0107..096e14d59 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -681,9 +681,14 @@ if(ENABLE_STATIC)
   endif()
 
   if(PNG_SUPPORTED)
+    if (APPLE)
+      find_package(ZLIB REQUIRED) # macos doesn't have static zlib
+    endif()
     set(CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_STATIC_LIBRARY_SUFFIX})
     find_package(PNG 1.6 REQUIRED)
-    find_package(ZLIB REQUIRED)
+    if (NOT APPLE)
+      find_package(ZLIB REQUIRED)
+    endif()
     target_include_directories(cjpeg-static PUBLIC ${PNG_INCLUDE_DIR} ${ZLIB_INCLUDE_DIR})
     target_link_libraries(cjpeg-static ${PNG_LIBRARY} ${ZLIB_LIBRARY})
   endif()