#645 Added cv::getBuildInformation function (with sample) to get OpenCV build configuration

CMakeLists.txt

@@ -667,9 +667,12 @@ endif()
 status("")
 status("  C++:")
 status("    Built as dynamic libs?:" BUILD_SHARED_LIBS THEN YES ELSE NO)
-status("    C++ Compiler:"           CMAKE_COMPILER    THEN "${CMAKE_COMPILER}" ELSE "${CMAKE_CXX_COMPILER}")
+status("    C++ Compiler:"           ${CMAKE_CXX_COMPILER})
 status("    C++ flags (Release):"    ${CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS_RELEASE})
 status("    C++ flags (Debug):"      ${CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS_DEBUG})
+status("    C Compiler:"             ${CMAKE_C_COMPILER})
+status("    C flags (Release):"      ${CMAKE_C_FLAGS} ${CMAKE_C_FLAGS_RELEASE})
+status("    C flags (Debug):"        ${CMAKE_C_FLAGS} ${CMAKE_C_FLAGS_DEBUG})
 if(WIN32)
   status("    Linker flags (Release):" ${CMAKE_EXE_LINKER_FLAGS} ${CMAKE_EXE_LINKER_FLAGS_RELEASE})
   status("    Linker flags (Debug):"   ${CMAKE_EXE_LINKER_FLAGS} ${CMAKE_EXE_LINKER_FLAGS_DEBUG})
@@ -770,7 +773,7 @@ else()
   status("    JPEG 2000:"  "NO")
 endif()
 
-status("    OpenEXR:"   WITH_OPENEXR AND OPENEXR_FOUND     THEN YES             ELSE NO)
+status("    OpenEXR:"   WITH_OPENEXR AND OPENEXR_FOUND     THEN ${OPENEXR_LIBRARIES} ELSE NO)
 status("    OpenNI:"    HAVE_OPENNI                        THEN YES             ELSE NO)
 status("    OpenNI PrimeSensor Modules:"
                         HAVE_OPENNI_PRIME_SENSOR_MODULE    THEN YES             ELSE NO)
@@ -814,7 +817,7 @@ elseif(APPLE)
     status("  Video I/O: AVFoundation")
   endif()
 elseif(WIN32)
-  status("  Video I/O:"        HAVE_VIDEOINPUT     THEN DirectShow ELSE NO)
+  status("  Video I/O:"      HAVE_VIDEOINPUT     THEN DirectShow ELSE NO)
 endif()
 
 # Other third-party libraries

cmake/OpenCVUtils.cmake

@@ -104,6 +104,16 @@ macro(CHECK_MODULE module_name define)
 endmacro()
 
 
+set(OPENCV_BUILD_INFO_FILE "${OpenCV_BINARY_DIR}/version_string.tmp")
+file(REMOVE "${OPENCV_BUILD_INFO_FILE}")
+function(ocv_output_status msg)
+  message(STATUS "${msg}")
+  if(msg MATCHES "\"")
+    string(REPLACE "\"" "\\\"" msg "${msg}")
+  endif()
+  file(APPEND "${OPENCV_BUILD_INFO_FILE}" "\"${msg}\\n\"\n")
+endfunction()
+
 # Status report function.
 # Automatically align right column and selects text based on condition.
 # Usage:
@@ -133,7 +143,7 @@ function(status text)
     if(status_text_length LESS status_placeholder_length)
       string(SUBSTRING "${text}${status_placeholder}" 0 ${status_placeholder_length} status_text)
     elseif(DEFINED status_then OR DEFINED status_else)
-      message(STATUS "${text}")
+      ocv_output_status("${text}")
       set(status_text "${status_placeholder}")
     else()
       set(status_text "${text}")
@@ -142,17 +152,17 @@ function(status text)
     if(DEFINED status_then OR DEFINED status_else)
       if(${status_cond})
         string(REPLACE ";" " " status_then "${status_then}")
-        message(STATUS "${status_text}" "${status_then}")
+        ocv_output_status("${status_text} ${status_then}")
       else()
         string(REPLACE ";" " " status_else "${status_else}")
-        message(STATUS "${status_text}" "${status_else}")
+        ocv_output_status("${status_text} ${status_else}")
       endif()
     else()
       string(REPLACE ";" " " status_cond "${status_cond}")
-      message(STATUS "${status_text}" "${status_cond}")
+      ocv_output_status("${status_text} ${status_cond}")
     endif()
   else()
-    message(STATUS "${text}")
+    ocv_output_status("${text}")
   endif()
 endfunction()
 
@@ -265,4 +275,4 @@ macro(ocv_to_full_paths VAR)
     set(${VAR} ${__tmp})
     unset(__tmp)
   endif()
-endmacro()
+endmacro()

modules/core/CMakeLists.txt

@@ -16,7 +16,13 @@ else()
   set(cuda_link_libs "")
 endif()
 
-ocv_glob_module_sources(SOURCES ${lib_cuda} ${cuda_objs})
+set(OPENCV_VERSION_FILE "${opencv_core_BINARY_DIR}/version_string.inc")
+add_custom_command(OUTPUT "${OPENCV_VERSION_FILE}"
+                   COMMAND ${CMAKE_COMMAND} -E copy_if_different "${OPENCV_BUILD_INFO_FILE}" "${OPENCV_VERSION_FILE}"
+                   MAIN_DEPENDENCY "${OPENCV_BUILD_INFO_FILE}"
+                   COMMENT "")
+
+ocv_glob_module_sources(SOURCES ${lib_cuda} ${cuda_objs} "${OPENCV_VERSION_FILE}")
 
 ocv_create_module(${cuda_link_libs})
 ocv_add_precompiled_headers(${the_module})
@@ -24,6 +30,3 @@ ocv_add_precompiled_headers(${the_module})
 ocv_add_accuracy_tests()
 ocv_add_perf_tests()
 
-
-
-

modules/core/include/opencv2/core/core.hpp

@@ -218,6 +218,8 @@ CV_EXPORTS void setNumThreads(int nthreads);
 CV_EXPORTS int getNumThreads();
 CV_EXPORTS int getThreadNum();
 
+CV_EXPORTS_W const std::string& getBuildInformation();
+
 //! Returns the number of ticks.
 
 /*!

modules/core/src/system.cpp

@@ -410,6 +410,14 @@ int getNumberOfCPUs(void)
 #endif
 }
 
+const std::string& getBuildInformation()
+{
+    static std::string build_info =
+#include "version_string.inc"
+    ;
+    return build_info;
+}
+
 string format( const char* fmt, ... )
 {
     char buf[1 << 16];

samples/cpp/opencv_version.cpp

@@ -0,0 +1,28 @@
+#include "opencv2/core/core.hpp"
+#include <iostream>
+
+const char* keys = 
+{
+    "{ b |build |false | print complete build info }"
+    "{ h |help  |false | print this help           }"
+};
+
+int main(int argc, const char* argv[])
+{
+    cv::CommandLineParser parser(argc, argv, keys);
+
+    if (parser.get<bool>("help"))
+    {
+        parser.printParams();
+    }
+    else if (parser.get<bool>("build"))
+    {
+        std::cout << cv::getBuildInformation() << std::endl;
+    }
+    else
+    {
+        std::cout << "OpenCV " << CV_VERSION << std::endl;	
+    }
+
+    return 0;
+}