Elysian Shadows

Posted: **Tue Nov 20, 2012 10:17 am**

Hi, this is my first post, and my question is how can i compile a library adn then use it in other projects, i tried, but it didnt worked

i did the following thing:

Graphics.h

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void RenderSurface(SDL_Surface *src,SDL_Rect *srcrect);

Graphics.cpp

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#include "Graphics.h"
#include <SDL.h>

void RenderSurface(SDL_Surface *src,SDL_Rect *srcrect)
{
   SDL_BlitSurface(src,NULL,SDL_GetVideoSurface(),srcrect);
}

i use codeblocks, so i created a static library project, compiled it, and it creates a Graphics.a and Graphics.o file, then i linked the Graphics.a to the compiler, but when i try to use the lib, including Graphics.h in an other project it sais the directory doesnt exist??

any suggestion?? im sure im compiling the lib wrong, so if anyone could explain me how to do it...

Posted: **Tue Nov 20, 2012 5:26 pm**

You should really go grab yourself a free copy of Visual Studio 2010: Expression Edition (or 2012 if you prefer). We'll be able to help you much easier than Code::Blocks and you'll have a far superior development tool.. it's a win-win.

Posted: **Tue Nov 20, 2012 7:35 pm**

Well, i recommend you to write your own Makefile for making the library for example:

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EXEC=Graphics.dll
CC=g++
SRC_EXT=cpp
CFLAGS=-D _WIN_ -I c:\SDL\Include\SDL -ldl -Wwrite-strings
LFLAGS=-shared -lmingw32 -lSDLmain -lSDL 
SRC=   ---- Here the path of the source -----
Bin=   ---- Where to create the DLL -----

all: $(BIN)$(EXEC) clean

$(BIN)$(EXEC): *.o
	$(CC) -o $(BIN)$(EXEC) *.o $(LFLAGS)

*.o:
	$(CC) -c $(SRC)*.$(SRC_EXT) $(CFLAGS)

clean:
	del -f *.o

then just open CMD and change the directory to where the makefile is located, and type 'make -f makefile' if make doesnt work try 'mingw32-make -f makefile' remember you must have minGW installed on your computer

Posted: **Tue Nov 20, 2012 8:44 pm**

lalacomun wrote:Well, i recommend you to write your own Makefile for making the library for example

Well.. yeah.. that's one way to do it. Definitely not the easiest for a beginner.

Posted: **Wed Nov 21, 2012 7:40 am**

If it says directory doesn't exist, sounds more like a project settings problem with the one you're trying to attach to the library.

Posted: **Wed Nov 21, 2012 2:09 pm**

Well, i tried with the Makefile, and it worked!

but i must admit i dont understand half of it

but now the problem is SDL_gfx, i tried using the flag -lSDL_gfx, but it doesnt work! maybe the flag is different??

any suggestions??

Posted: **Thu Nov 22, 2012 5:26 am**

In the makefile LFLAGS line (iirc), add a -L path_to_sdl_gfx
http://www.rapidtables.com/code/linux/gcc/gcc-l.htm

Elysian Shadows

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