From d369d18ac9e8f249a6bfc4ed70cdeaf6a861e931 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Dan=20Hor=C3=A1k?= <dan[at]danny.cz>
Date: Wed, 18 Jan 2012 20:39:05 +0100
Subject: [PATCH 03/11] use system zlib if available

---
 CMakeLists.txt            |    6 +++++-
 src/zipios/CMakeLists.txt |   16 +++++++++++++---
 2 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 397f138..b627129 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -42,11 +42,15 @@ set( CMAKE_OSX_SYSROOT "/Developer/SDKs/MacOSX10.6.sdk" )
 # Universal builds for mac
 set( CMAKE_OSX_ARCHITECTURES "i386;x86_64" )
 
+find_package( ZLIB )
+
 # The parsing order is significant!
 add_subdirectory( src/BoostParts )
 add_subdirectory( src/Xerces )
 add_subdirectory( src/XercesExtensions )
-add_subdirectory( src/zlib )
+if( NOT ZLIB_FOUND )
+    add_subdirectory( src/zlib )
+endif()
 add_subdirectory( src/zipios )
 add_subdirectory( src/googlemock )
 add_subdirectory( src/FlightCrew )
diff --git a/src/zipios/CMakeLists.txt b/src/zipios/CMakeLists.txt
index 1c135c1..9b4d039 100644
--- a/src/zipios/CMakeLists.txt
+++ b/src/zipios/CMakeLists.txt
@@ -17,15 +17,25 @@ file( GLOB_RECURSE SOURCES *.cpp *.h )
 # and the headers for the linked-to libraries
 include_directories( ${CMAKE_CURRENT_SOURCE_DIR}
                      ${BoostParts_SOURCE_DIR}
-                     ${zlib_SOURCE_DIR}
-                     ${zlib_BINARY_DIR}
                      )
 
+if( ZLIB_FOUND )
+    include_directories( ${ZLIB_INCLUDE_DIRS} )
+else()
+    include_directories( ${zlib_SOURCE_DIR} ${zlib_BINARY_DIR} )
+endif()
+
 link_directories ( ${PROJECT_BINARY_DIR}/lib )
 
 add_library( ${PROJECT_NAME} ${SOURCES} )
 
-target_link_libraries( ${PROJECT_NAME} zlib BoostParts )
+target_link_libraries( ${PROJECT_NAME} BoostParts )
+if( ZLIB_FOUND )
+    target_link_libraries( ${PROJECT_NAME} ${ZLIB_LIBRARIES} )
+else()
+    target_link_libraries( ${PROJECT_NAME} zlib )
+endif()
+
 
 #############################################################################
 
-- 
1.7.7.4