[SOLVED] Unable to build any KDevelop project C++ (complete noob)

[Predator106]

Hello, I'm a complete noob to any non-Microshaft development environments, and I decided to go with KDevelop and the SDL library, to do game programming, this is in C++ by the way.
So I tried creating a new project as one guide had pointed out, to support that library, but unfortunately I couldn't build it. So I figured OK, I'll create a standard C++ project, which should surely build successfully. I was wrong.

Here is the error that I get, I have not modified anything really(unless you count colors :) ).

I hope nobody gets mad or anything about the size of the screenie. I just wanted it to display what was going on basically. And by the way, I have wordwrap in the output window.

To simplify it for you, this is what it says:

cd '/home/shaun/Programming/test' && WANT_AUTOCONF_2_5="1" WANT_AUTOMAKE_1_6="1" LC_MESSAGES="C" LC_CTYPE="C" make -f Makefile.cvs && mkdir '/home/shaun/Programming/test/debug' && cd '/home/shaun/Programming/test/debug' && CXXFLAGS="-O0 -g3" "/home/shaun/Programming/test/configure" --enable-debug=full && cd '/home/shaun/Programming/test/debug' && WANT_AUTOCONF_2_5="1" WANT_AUTOMAKE_1_6="1" LC_MESSAGES="C" LC_CTYPE="C" make -k
aclocal
make: aclocal: Command not found
make: *** [all] Error 127
*** Exited with status: 2 ***

Hopefully you guys can help me figure out what is wrong.




http://ubuntuforums.org/attachment.php?attachmentid=74752&stc=1&d=1213973281

[geirha]

I've never used kdevelop, but the error message says it can't find the aclocal program. aclocal is part of the automake (apt:automake) package, so installing that package should fix that error.

[diaa]

GCC(the compiler) doesn't come with ubuntu so you have to install it manually, I think that's what you need.
To install the compiler and required tools:
sudo apt-get install essential make

also you may need the packages autoconf automake so install then also
sudo apt-get install automake autoconf

[Predator106]

Well the first one doesn't work, it says no such package 'essential'.
The second one did work and download stuff, but then this made me realize that I was missing dependencies for KDevelop, so I found their page and am installing them now... Hopefully it will work perfectly.

[diaa]

sorry, it was supposed to be
sudo apt-get install build-essential make

[WW]

sorry, it was supposed to be
sudo apt-get install build-essential make
build-essential (http://packages.ubuntu.com/hardy/build-essential) depends on make, so you don't have to explicitly list make; apt-get will do that for you (but there is no harm in including it).

[Predator106]

Oh Okay. The only problem is now, it seems that the compiler/linker can't find SDL. But the thing is, it shows no problems with the #include "SDL/SDL.h".

The problem is when it comes across SDL commands like...SDL_INIT_AUDIO
It says that it can't find it. I am using the template from KDevelop for SDL, so it should be bug free code...

cd '/home/shaun/Programming/SDL_Test/debug' && WANT_AUTOCONF_2_5="1" WANT_AUTOMAKE_1_6="1" LC_MESSAGES="C" LC_CTYPE="C" make
make all-recursive
Making all in src
linking sdl_test (g++)
linking sdl_test (g++)
sdl_test.o: In function `main':
/home/shaun/Programming/SDL_Test/src/sdl_test.cpp:37: undefined reference to `SDL_Init'
/home/shaun/Programming/SDL_Test/src/sdl_test.cpp:38: undefined reference to `SDL_GetError'
/home/shaun/Programming/SDL_Test/src/sdl_test.cpp:39: undefined reference to `SDL_Quit'
/home/shaun/Programming/SDL_Test/src/sdl_test.cpp:43: undefined reference to `SDL_CDNumDrives'
/home/shaun/Programming/SDL_Test/src/sdl_test.cpp:45: undefined reference to `SDL_CDName'
/home/shaun/Programming/SDL_Test/src/sdl_test.cpp:44: undefined reference to `SDL_CDNumDrives'
/home/shaun/Programming/SDL_Test/src/sdl_test.cpp:48: undefined reference to `SDL_Quit'
collect2: ld returned 1 exit status
make[2]: *** [sdl_test] Error 1
make[1]: *** [all-recursive] Error 1
make: *** [all] Error 2
*** Exited with status: 2 ***

I didn't mess with any of the linker options or anything either...Could that be the problem?

[diaa]

you need SDL libraries:
sudo apt-get install libsdl-dev

[diaa]

you need SDL libraries:
sudo apt-get install libsdl-dev

Oh, you said it compiles properly so I think you have the headers and the libraries , you need to tell the compiler to link with SDL libraries, the following command returns the options that should be passed to the compiler to link with SDL libraries

pkg-config sdl --libs--cflags

so if compiling manually you do the following:
gcc -o app app.cpp `pkg-config sdl --libs--cflags`

notice that these are backticks, it makes the terminal evaluate the command in between and replace it with its output so it becomes
gcc -o app app.cpp <output of pkg-config sdl --libs--cflags>

you need to figure out how to do this in KDevelop but it shouldn't be hard

[Predator106]

YES!! YES!! Man, you have no idea how grateful I am, the solution now outputs to the console.

Just FYI, and in case someone ever has this same problem, and happens to be searching for it or something, to get it working I did the following in KDevelop.

(in system terminal)

pkg-config sdl --libs --cflags

For me, it returned the following:

-D_GNU_SOURCE=1 -D_REENTRANT -I/usr/include/SDL -lSDL

I then did the following:

Project-> Project Options :: Configure Options :: C++.Compiler Flags(CXXFLAGS)

I just appended the line I got from the terminal at the end of the textbox.

Thanks so much everyone, now I should finally be able to continue learning C++, and try out and learn SDL.

[Can+~]

Please learn how to compile with the command line before jumping with IDEs. That knowledge will make you a better programmer, you can compile it on almost any *nix OS even without an IDE (or a GUI frontend for that matter), and get a deeper knowledge on how compiler works, and how to use them properly.

[Predator106]

Okay, I'll think about it.

[tito.112]

Oh, you said it compiles properly so I think you have the headers and the libraries , you need to tell the compiler to link with SDL libraries, the following command returns the options that should be passed to the compiler to link with SDL libraries

pkg-config sdl --libs--cflags

so if compiling manually you do the following:
gcc -o app app.cpp `pkg-config sdl --libs--cflags`

notice that these are backticks, it makes the terminal evaluate the command in between and replace it with its output so it becomes
gcc -o app app.cpp <output of pkg-config sdl --libs--cflags>

you need to figure out how to do this in KDevelop but it shouldn't be hard

I have problem with the that : pkg-config sdl --libs--cflags , it gives me that error report : tito112@tito112-desktop:~$ pkg-config sdl --libs--cflags
--libs--cflags: unknown option

please help me in that error , I can't run a program .
and the Kdevelop gives me this error : konsole --workdir '/home/tito112/Desktop/essam/debug/./src' -e /bin/sh -c '/home/tito112/Desktop/essam/debug/./src/essam ; echo "Press Enter to continue!";read dummy'
/bin/sh: konsole: not found
*** Exited with status: 127 ***

[geirha]

tito112@tito112-desktop:~$ pkg-config sdl --libs--cflags
--libs--cflags: unknown option


There should be a space between the two options --libs and --cflags
pkg-config sdl --libs --cflags