将dlib添加到C ++ Eclipse

Question

I am trying to add dlib library to eclipse. I downloaded dlib from http://dlib.net/ and copied the dlib folder into my project folder.

Then I do the following:

(1) Project -> C/C++ General -> Paths and Symbols (2) Choose GNU C++ (3) Choose Add (4) Choose Variables (5) Type "ProjDirPath"

I copy the code from http://dlib.net/optimization_ex.cpp.html into a source file. Everything seems okay (ie nothing underlined in red).

I try build the file and I get:

Info: Internal Builder is used for build g++ "-IC:/Users/..." -O0 -g3 -Wall -c -fmessage-length=0 -o main.o "..\\main.cpp" In file included from c:... ... ... " Is there something I am doing wrong? Why cannot I not run the code on their website?

I have also tried adding the dlib library as follows (same as here How to add a library to an Eclipse project )

(1) Project -> Properties -> C/C++ Build -> Settings -> MinGW C++ Linker -> Libraries

(2) I add dlib to the top (Libraries(-l)) and the location of the dlib folder library at the bottom (Libraries(-L)).

I then get the error

Info: Internal Builder is used for build g++ "-LC:\\Users..." -o myfile.exe main.o -ldlib c:/mingw/bin/../lib/gcc/x86_64-w64-mingw32/7.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -ldlib collect2.exe: error: ld returned 1 exit status

Finally, I'll mention that I'm new to C++.

Answer 1

Since you are new to C++ you should use cmake to generate your project. If you type something like this:

cd dlib/examples
mkdir build
cd build
cmake -G "Eclipse CDT4 - Unix Makefiles" ..

cmake will create an Eclipse project for you that will be correctly configured. CMake can generate a lot of different project types. If you type cmake -h you will see a list of "generators" supported by cmake like visual studio, sublime text, etc.

Writing CMake configure files is also very easy. The one for the dlib examples serves double purpose as a simple cmake tutorial and is worth looking at: http://dlib.net/examples/CMakeLists.txt.html