From eefd1fdd488eba88834a41d1008e0a8f1ae2a41c Mon Sep 17 00:00:00 2001
From: Konstantin Podsvirov <konstantin@podsvirov.pro>
Date: Tue, 2 Aug 2016 22:37:36 +0300
Subject: CMake: Auto find ZLIB from package config if nedded

---
 cmake/CMakeLists.txt           | 2 ++
 cmake/protobuf-config.cmake.in | 3 +++
 2 files changed, 5 insertions(+)

(limited to 'cmake')

diff --git a/cmake/CMakeLists.txt b/cmake/CMakeLists.txt
index 07b176d9..f947b741 100644
--- a/cmake/CMakeLists.txt
+++ b/cmake/CMakeLists.txt
@@ -86,6 +86,7 @@ if (CMAKE_USE_PTHREADS_INIT)
   add_definitions(-DHAVE_PTHREAD)
 endif (CMAKE_USE_PTHREADS_INIT)
 
+set(_protobuf_FIND_ZLIB)
 if (protobuf_WITH_ZLIB)
   find_package(ZLIB)
   if (ZLIB_FOUND)
@@ -96,6 +97,7 @@ if (protobuf_WITH_ZLIB)
     # Using imported target if exists
     if (TARGET ZLIB::ZLIB)
       set(ZLIB_LIBRARIES ZLIB::ZLIB)
+      set(_protobuf_FIND_ZLIB "if(NOT ZLIB_FOUND)\n  find_package(ZLIB)\nendif()")
     endif (TARGET ZLIB::ZLIB)
   else (ZLIB_FOUND)
     set(HAVE_ZLIB 0)
diff --git a/cmake/protobuf-config.cmake.in b/cmake/protobuf-config.cmake.in
index 37315510..a044fe5c 100644
--- a/cmake/protobuf-config.cmake.in
+++ b/cmake/protobuf-config.cmake.in
@@ -1,6 +1,9 @@
 # User options
 include("${CMAKE_CURRENT_LIST_DIR}/protobuf-options.cmake")
 
+# Depend packages
+@_protobuf_FIND_ZLIB@
+
 # Imported targets
 include("${CMAKE_CURRENT_LIST_DIR}/protobuf-targets.cmake")
 
-- 
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