[SOLVED] SDL + Eclipse + CDT hello world compiling but not linking with g++ on arch linux

fedoraDrew · 01-22-2011, 12:24 PM

Hi all,

I have set up Eclipse + CDT on an Arch 2010.05 install. I set up an eclipse project and added SDL as a dependency (see below):

Project -> Properties
* -> GCC C++ Compiler -> Preprocessor -> main=SDL_main
* -> GCC C++ Linker -> Libraries -> SDLmain SDL (in that order top to bottom)
* -> GCC C++ Linker -> Libraries -> Library Search Path -> /usr/lib/ (I verified that libSDL.a and libSDLmain.a are there)

This is the code I'm compiling. It's designed to just be a hello world style SDL app to see that everything is working.

Code:

#include <SDL/SDL.h>

int main(int argc, char **argv)
{
    SDL_Init(SDL_INIT_VIDEO);
    SDL_Quit();
    return 0;
}

But when I compile I get this error:

Code:

Building target: client
Invoking: GCC C++ Linker
g++ -L/usr/lib/ -o"client"  ./src/engine/CEngine.o ./src/engine/main.o   -lSDLmain -lSDL
/usr/lib/gcc/x86_64-unknown-linux-gnu/4.5.2/../../../../lib/crt1.o: In function `_start':
(.text+0x20): undefined reference to `main'
collect2: ld returned 1 exit status
make: *** [client] Error 1

Anyone know how to set up Eclipse + CDT + SDL properly?

paulsm4 · 01-22-2011, 12:34 PM

Q: Does "./src/engine/main.o" exist?

Q: Is "main.cpp" the file you posted above (with "int main()" in it)?

fedoraDrew · 01-22-2011, 05:45 PM

Quote:

Originally Posted by paulsm4

Q: Does "./src/engine/main.o" exist?

Yes it does. I found it in the Debug/src/engine/ directory where the compiler spits out all its output. Eclipse also sets a default behavior to cd to the Debug/ dir when running the executable.

Quote:

Originally Posted by paulsm4

Q: Is "main.cpp" the file you posted above (with "int main()" in it)?

Yes, the code pasted above is contained in that file. There are some other files that get compiled too (the /src/engine/CEngine bit) but I am not using them yet.

fedoraDrew · 01-22-2011, 06:25 PM

If I remove the symbol mapping of main to SDL_main (i.e. do NOT pass the argument -Dmain=SDL_main) then there is no compilation or link problem and the program runs as expected.

I'm not sure why all the tutorials I've read say to set SDL_main, but since I can compile and run now, I'm marking this as resolved.