From 7b5ff72987d413c0051744cf53b453f70f160f6f Mon Sep 17 00:00:00 2001
From: Alexandre Abadie <alexandre.abadie@therapixel.com>
Date: Wed, 21 Oct 2015 18:20:08 +0200
Subject: [PATCH] Add option to use FindDCMTK modules or not.

---
 CMakeLists.txt         | 10 +++++++++-
 example/CMakeLists.txt |  2 +-
 src/CMakeLists.txt     |  8 ++++----
 3 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 281e5df..1cde67e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.1)
+cmake_minimum_required(VERSION 3.0.2)
 
 project(QTDCM VERSION "2.1.0")
 
@@ -14,6 +14,14 @@ else()
 endif()
 mark_as_advanced(LIBRARY_OUTPUT_PATH EXECUTABLE_OUTPUT_PATH)
 
+option(DCMTK_FIND_PACKAGE_USE_CONFIG_ONLY 
+  "Do not use any FindDCMTK.cmake module found in the CMAKE_MODULE_PATH to find DCMTK." 
+  OFF)
+
+if(DCMTK_FIND_PACKAGE_USE_CONFIG_ONLY)
+  set(DCMTK_FIND_PACKAGE_STATEGY NO_MODULE)
+endif()
+
 set(${PROJECT_NAME}_CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake)
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${${PROJECT_NAME}_CMAKE_MODULE_PATH}")
 
diff --git a/example/CMakeLists.txt b/example/CMakeLists.txt
index 721a25c..d3fbf2d 100644
--- a/example/CMakeLists.txt
+++ b/example/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.1)
+cmake_minimum_required(VERSION 3.0.2)
 
 project(dicom)
 
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index af5c962..cdb4462 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.1)
+cmake_minimum_required(VERSION 3.0.2)
 
 project(qtdcm)
 
@@ -7,10 +7,10 @@ find_package( Qt5 REQUIRED COMPONENTS Core Widgets Network)
 get_target_property(QT5_QMAKE_EXECUTABLE Qt5::qmake LOCATION)
 get_filename_component(QT5_BINARY_DIR ${QT5_QMAKE_EXECUTABLE} PATH)
 
-find_package(DCMTK REQUIRED)
+find_package(DCMTK REQUIRED ${DCMTK_FIND_PACKAGE_STATEGY})
 include_directories(${DCMTK_INCLUDE_DIRS})
 
-if(APPLE)
+if(APPLE AND NOT DCMTK_FIND_PACKAGE_USE_CONFIG_ONLY)
   include(FixDCMTKMacInstall)
   FixDCMTKMacInstall()
 endif()
@@ -146,7 +146,7 @@ target_link_libraries(${PROJECT_NAME} ${${PROJECT_NAME}_LIBRARIES})
 source_group("Header Files" REGULAR_EXPRESSION .*\\.h\$)
 source_group("Generated Files" FILES ${${PROJECT_NAME}_MOC_SRCS})
 
-if(APPLE)
+if(APPLE AND NOT DCMTK_FIND_PACKAGE_USE_CONFIG_ONLY)
   include(FixDCMTKMacLink)
   FixDCMTKMacLibLink(${PROJECT_NAME})
 endif()