OpenCV with gcc and CMake: Cannot find source file [closed]

edit

It seems that's not a problem with opencv install but with file DisplayImage.cpp. Are you sure of file name ( uppercase , lowercase)?

Yes, the name are the same. I just copied it from the tutorial

My CMakeLists.txt

cmake_minimum_required(VERSION 2.8)
project( DisplayImage )
find_package( OpenCV REQUIRED )
include_directories( ${OpenCV_INCLUDE_DIRS} )
add_executable( DisplayImage DisplayImage.cpp )
target_link_libraries( DisplayImage ${OpenCV_LIBS} )

May be I'm wrong but I still think your filename is wrong not your CMakefLists.txt. you can try like this

cmake_minimum_required(VERSION 2.8)
project( DisplayImage )
find_package( OpenCV REQUIRED )

file(GLOB DisplayImage_SRCS
    "*.h"
    "*.cpp")

ADD_EXECUTABLE (DisplayImage ${DisplayImage_SRCS})

include_directories( ${OpenCV_INCLUDE_DIRS} )
target_link_libraries( DisplayImage ${OpenCV_LIBS} )

I changed the CMakeLists.txt with your code and there is the result:

CMake Error at CMakeLists.txt:9 (ADD_EXECUTABLE):
  add_executable called with incorrect number of arguments

CMake Error at CMakeLists.txt:12 (target_link_libraries):
  Cannot specify link libraries for target "DisplayImage" which is not built
  by this project.

-- Configuring incomplete, errors occurred!

What's that meaning?

The folder where I execute cmake . is that

[doliveira@localhost OpenCV_tests]$ ll
total 8
-rwxrwxr-x. 1 doliveira doliveira 239 Ago 23 22:10 CMakeLists.txt
-rwxrwxr-x. 1 doliveira doliveira 478 Ago 23 11:57 DisplayImage.cpp 
[doliveira@localhost OpenCV_tests]$

It means that cmake cannot find any source file in folder. You're using linux and called cmake from a terminal I think. So simple way is :

cd folder_where source files and CMakeLists.txt are
cmake

So nowmay be I'm wrong your name file is good but CMakeLists.txt is not in same directory than sourcefile or you don't call cmake from directory where are CMakeLists.txt and DisplayImage.cpp

I call cmake in the same directory where are CMakeLists.txt and DisplayImage.cpp.

[doliveira@localhost OpenCV_tests]$ ll
total 8
-rwxrwxr-x. 1 doliveira doliveira 239 Ago 23 22:11 CMakeLists.txt
-rwxrwxr-x. 1 doliveira doliveira 478 Ago 23 11:57 DisplayImage.cpp 
[doliveira@localhost OpenCV_tests]$ cmake .
CMake Error at CMakeLists.txt:5 (add_executable):
  Cannot find source file:

    DisplayImage.cpp

  Tried extensions .c .C .c++ .cc .cpp .cxx .m .M .mm .h .hh .h++ .hm .hpp
  .hxx .in .txx

-- Generating done
-- Build files have been written to: /home/doliveira/Documentos/OpenCV_tests

How can I sprecifie the directory of DisplayImage.cpp in the CMakeLists.txt?

It's really weird.

yes it's possible go to cmake site. But you can specify source_dir in command line

cmake-D CMAKE_SOURCE_DIR="/home/doliveira/Documentos/OpenCV_tests" -D CMAKE_BINARY_DIR="/home/doliveira/Documentos/OpenCV_tests/bin"

Now I still think you've got problem with file name. Have you copy cmakelist from web? May be you've got some invisible character. When I select this line

-rwxrwxr-x. 1 doliveira doliveira 478 Ago 23 11:57 DisplayImage.cpp

I have got a white character after cpp Try to rename DisplayImage.cpp in Displayimage.cc...

The problem was the name!

The white character after the .cpp.

I will never see that detail.

Thank you @LBerger for your time!

@sturkmen Yes, I did but didn't work to

ok. anyhow you got solution i think. while i was writing my comment you post stating the problem was about filename.