Hello, this is my first post.

I'm using Ubuntu 9.10 and the default repository uses Allegro 4.2. I downloaded the source to 4.4.0 as I would like AllegroGL and the other extensions it has built-in. I then ran cmake, make and 'make install' and all seemed to go well.

allegro-config --libs --version
4.4.0
-L/usr/local/lib -lalleg

When I try to compile+link (even the simplest of programs that I had no problem with using 4.2) I now get the following error message :

error while loading shared libraries: liballeg.so.4.4: cannot open shared object file: No such file or directory

Any pointers would be appreciated.

No I hadn't. Thank you. I am learning what it means to develop on Linux and appreciate your help and quick response. It seems to be working fine now.

Here are the steps I took :

1) Uninstalled 'liballegro4.2-dev' in Synaptic. Not a required step if you haven't already installed it from the default repository.

2) Downloaded source from Allegro site (allegro-4.4.0.tar.gz), extracted it and navigated to it's directory via the command line.

3) Installed cmake : sudo apt-get install cmake

4) Installed dependencies (hinted at in docs/build/cmake.txt) : sudo apt-get install libogg-dev libvorbis-dev libpng12-dev libasound2-dev libjack-dev libbio2jack0 libbio2jack0-dev

5) cmake CMakeLists.txt

6) make

7) sudo make install

8) sudo ldconfig

Have I missed anything? I am hoping it may be of assistance to others just starting out. I would appreciate a more experienced user's verification of the above.

Thanks again SiegeLord.

Thank you Peter. I have edited the steps above, is that better?

Are the addons for Allegro-4.4.0 automatically installed through the above procedure? I am getting errors (missing files) when I attempt to compile the "very special hello world" found here : http://wiki.allegro.cc/index.php?title=Hardware_Accelerated_Allegro_%28AllegroGL%29

gcc -Wall -c "test.c"
In file included from /usr/local/include/alleggl.h:73, from test.c:2:
/usr/local/include/allegrogl/gl_ext.h:12:41: error: allegrogl/GLext/gl_ext_defs.h: No such file or directory
/usr/local/include/allegrogl/gl_ext.h:16:42: error: allegrogl/GLext/glx_ext_defs.h: No such file or directory
/usr/local/include/allegrogl/gl_ext.h:27:41: error: allegrogl/GLext/gl_ext_api.h: No such file or directory
/usr/local/include/allegrogl/gl_ext.h:31:42: error: allegrogl/GLext/glx_ext_api.h: No such file or directory
/usr/local/include/allegrogl/gl_ext.h:43:44: error: allegrogl/GLext/gl_ext_alias.h: No such file or directory
/usr/local/include/allegrogl/gl_ext.h:53:45: error: allegrogl/GLext/glx_ext_alias.h: No such file or directory
/usr/local/include/allegrogl/gl_ext.h:61:45: error: allegrogl/GLext/gl_ext_list.h: No such file or directory
/usr/local/include/allegrogl/gl_ext.h:68:46: error: allegrogl/GLext/glx_ext_list.h: No such file or directory
Compilation failed.

I did have the following reported when I ran CMake :

-- Looking for glXGetProcAddress
-- Looking for glXGetProcAddress - found

Peter, I also found that if I didn't 'sudo make' I was getting a permission denied error.

I was using Allegro 4.2 happily. I wanted to give hardware accelerated 2D a try because I want a fluid 1920x1200 full screen experience. I figured rather than installing Allegrogl separately I may as well get 4.4.0 which has that and more. I have installed numerous mesa-dev, nvidia-glx-dev and other libraries to no avail. If someone started with a fresh Ubuntu 9.10 installation and wanted to be Allegro 4.4.0 ready ... what exactly needs to happen? I have no problem using 4.4.0 itself, but no luck with the Allegrogl addon in particular.

Here is the code I am unable to compile :

#include <allegro.h>
#include <alleggl.h>
 
int main() {
   if (allegro_init() != 0) {
      return 1;
   }
   if (install_allegro_gl() != 0) {
      return 1;
   }
 
   install_keyboard();
   install_timer();
 
   allegro_gl_set(AGL_DOUBLEBUFFER, 1);
   allegro_gl_set(AGL_WINDOWED, TRUE);
   allegro_gl_set(AGL_COLOR_DEPTH, 32);
   allegro_gl_set(AGL_SUGGEST, AGL_DOUBLEBUFFER | AGL_WINDOWED | AGL_COLOR_DEPTH);
   if(set_gfx_mode(GFX_OPENGL, 800, 600, 0, 0)) {
       allegro_message ("Error setting OpenGL graphics mode:\n%s\n"
                        "Allegro GL error : %s\n",
                        allegro_error, allegro_gl_error);
       exit(0);
   }
 
   allegro_gl_set_allegro_mode();
 
   textout_ex(screen, font, "Hello World!", 50, 100, makecol(255, 0, 0), -1);
 
   allegro_gl_unset_allegro_mode();
 
   allegro_gl_flip();
   readkey();
 
   return 0;
}
END_OF_MAIN()

Thanks Peter.

I have attached the two files you referred me to. Can you shed any light on my situation?

Should I be uninstalling Allegro 4.4.0 before re-installing it? If so, how do I perform a proper uninstall?

Among several other dependencies I have installed both libglu1-mesa-dev and libgl1-mesa-dev.

Great news! Thank you very much Peter.

I can now compile. However, I can't link properly.

gcc -W -Wall -s -O2 -pipe demo.c -o demo -lagl `allegro-config --libs` -lGL -lGLU
/usr/bin/ld: cannot find -lagl
collect2: ld returned 1 exit status

Working for me now! Thanks again Peter for all your help.