From 3425c90b66584a56b67a5d2cb11ef23e7a41a262 Mon Sep 17 00:00:00 2001
From: Alexander Smorkalov <alexander.smorkalov@itseez.com>
Date: Tue, 13 Jan 2015 14:39:56 +0300
Subject: [PATCH] GPU samples with NVIDIA specific API excluded from build if
 CUDA disabled.

---
 samples/gpu/CMakeLists.txt                   | 33 +++++++++++++++++---
 samples/gpu/cascadeclassifier_nvidia_api.cpp | 21 ++-----------
 samples/gpu/opticalflow_nvidia_api.cpp       | 14 ---------
 3 files changed, 31 insertions(+), 37 deletions(-)

diff --git a/samples/gpu/CMakeLists.txt b/samples/gpu/CMakeLists.txt
index 56aaf0c587..030283c8ba 100644
--- a/samples/gpu/CMakeLists.txt
+++ b/samples/gpu/CMakeLists.txt
@@ -69,11 +69,27 @@ if(BUILD_EXAMPLES AND OCV_DEPENDENCIES_FOUND)
     endif()
   ENDMACRO()
 
+  # remove all matching elements from the list
+  MACRO(list_filterout lst regex)
+    foreach(item ${${lst}})
+      if(item MATCHES "${regex}")
+        list(REMOVE_ITEM ${lst} "${item}")
+      endif()
+    endforeach()
+  ENDMACRO()
+
   file(GLOB all_samples RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} *.cpp)
 
-  if(NOT WITH_OPENGL)
+  if(NOT HAVE_OPENGL)
     list(REMOVE_ITEM all_samples "opengl.cpp")
-  endif(NOT WITH_OPENGL)
+  endif()
+
+  if(NOT HAVE_CUDA)
+    list(REMOVE_ITEM all_samples "opticalflow_nvidia_api.cpp")
+    list(REMOVE_ITEM all_samples "cascadeclassifier_nvidia_api.cpp")
+    list(REMOVE_ITEM all_samples "driver_api_multi.cpp")
+    list(REMOVE_ITEM all_samples "driver_api_stereo_multi.cpp")
+  endif()
 
   foreach(sample_filename ${all_samples})
     get_filename_component(sample ${sample_filename} NAME_WE)
@@ -86,9 +102,16 @@ endif()
 
 if (OCV_DEPENDENCIES_FOUND AND INSTALL_C_EXAMPLES AND NOT WIN32)
   file(GLOB install_list *.c *.cpp *.jpg *.png *.data makefile.* build_all.sh *.dsp *.cmd )
-  if(NOT WITH_OPENGL)
-    list(REMOVE_ITEM all_samples "opengl.cpp")
-  endif(NOT WITH_OPENGL)
+  message(" install_list: ${install_list}")
+  if(NOT HAVE_OPENGL)
+    list_filterout(install_list ".*opengl.cpp")
+  endif()
+  if(NOT HAVE_CUDA)
+    list_filterout(install_list ".*opticalflow_nvidia_api.cpp")
+    list_filterout(install_list ".*cascadeclassifier_nvidia_api.cpp")
+    list_filterout(install_list ".*driver_api_multi.cpp")
+    list_filterout(install_list ".*driver_api_stereo_multi.cpp")
+  endif()
   install(FILES ${install_list}
           DESTINATION ${OPENCV_SAMPLES_SRC_INSTALL_PATH}/gpu
           PERMISSIONS OWNER_READ GROUP_READ WORLD_READ COMPONENT samples)
diff --git a/samples/gpu/cascadeclassifier_nvidia_api.cpp b/samples/gpu/cascadeclassifier_nvidia_api.cpp
index 98195b35c2..87258b9a05 100644
--- a/samples/gpu/cascadeclassifier_nvidia_api.cpp
+++ b/samples/gpu/cascadeclassifier_nvidia_api.cpp
@@ -2,39 +2,24 @@
 #pragma warning( disable : 4201 4408 4127 4100)
 #endif
 
-#include "cvconfig.h"
 #include <iostream>
 #include <iomanip>
 #include <cstdio>
 #include "opencv2/gpu/gpu.hpp"
 #include "opencv2/highgui/highgui.hpp"
-
-#ifdef HAVE_CUDA
 #include "NCVHaarObjectDetection.hpp"
-#endif
 
 using namespace std;
 using namespace cv;
 
-
-#if !defined(HAVE_CUDA) || defined(__arm__)
-
-int main( int, const char** )
-{
-#if !defined(HAVE_CUDA)
-    std::cout << "CUDA support is required (CMake key 'WITH_CUDA' must be true)." << std::endl;
-#endif
-
 #if defined(__arm__)
+int main()
+{
     std::cout << "Unsupported for ARM CUDA library." << std::endl;
-#endif
-
     return 0;
 }
-
 #else
 
-
 const Size2i preferredVideoFrameSize(640, 480);
 const string wndTitle = "NVIDIA Computer Vision :: Haar Classifiers Cascade";
 
@@ -386,4 +371,4 @@ int main(int argc, const char** argv)
     return 0;
 }
 
-#endif //!defined(HAVE_CUDA)
+#endif
diff --git a/samples/gpu/opticalflow_nvidia_api.cpp b/samples/gpu/opticalflow_nvidia_api.cpp
index 31ee569788..d0b071f64c 100644
--- a/samples/gpu/opticalflow_nvidia_api.cpp
+++ b/samples/gpu/opticalflow_nvidia_api.cpp
@@ -9,26 +9,14 @@
 #include <ctime>
 #include <ctype.h>
 
-#include "cvconfig.h"
 #include <iostream>
 #include <iomanip>
 #include "opencv2/gpu/gpu.hpp"
 #include "opencv2/highgui/highgui.hpp"
 
-#ifdef HAVE_CUDA
 #include "NPP_staging/NPP_staging.hpp"
 #include "NCVBroxOpticalFlow.hpp"
-#endif
-
-#if !defined(HAVE_CUDA)
-int main( int, const char** )
-{
-    std::cout << "Please compile the library with CUDA support" << std::endl;
-    return -1;
-}
-#else
 
-//using std::tr1::shared_ptr;
 using cv::Ptr;
 
 #define PARAM_LEFT  "--left"
@@ -649,5 +637,3 @@ int main(int argc, char **argv)
 
     return 0;
 }
-
-#endif