Merge pull request spmallick#264 from saumyakswain/master

Resolved [-fpermissive] error while issuing make

Author: spmallick

QRCode-OpenCV/CMakeLists.txt

@@ -2,7 +2,9 @@ cmake_minimum_required(VERSION 2.8.12)
 
 PROJECT(opencv_tests)
 
-set(OpenCV_DIR <specify your path to the opencv installation directory>installations/OpenCV4/lib/cmake/opencv4/)
+if(NOT OpenCV_DIR)
+  set(OpenCV_DIR <specify your path to the opencv installation directory>installations/OpenCV4/lib/cmake/opencv4/)
+endif()
 find_package( OpenCV REQUIRED )
 
 set(CMAKE_CXX_STANDARD 11)

QRCode-OpenCV/README.md

@@ -6,7 +6,15 @@ This directory contains code for using OpenCV QR code. This code requires **Open
 # For C++
 
 ## How to compile the code
-First Specify the **OpenCV_DIR** in CMakeLists.txt file. Then,
+
+Specify the **OpenCV_DIR** in CMake option
+
+```
+cmake -D OpenCV_DIR=<path to opencv install directory>/lib/cmake/opencv4/ .
+make
+```
+
+OR First Specify the **OpenCV_DIR** in CMakeLists.txt file. Then,
 
 ```
 cmake .

QRCode-OpenCV/qrCodeOpencv.cpp

@@ -27,7 +27,7 @@ int main(int argc, char* argv[])
   else
     inputImage = imread("qrcode-learnopencv.jpg");
 
-  QRCodeDetector qrDecoder = QRCodeDetector::QRCodeDetector();
+  QRCodeDetector qrDecoder;
 
   Mat bbox, rectifiedImage;