Trying A5 on MacOS without Xcode

Trying A5 on MacOS without Xcode

nonpro

Member #12,577

February 2011

Hello,

I'm learning C++ and trying out some game libraries, so I decided to give Allegro a spin.

I've copied the example from http://wiki.allegro.cc/index.php?title=Allegro_5_Tutorial/Displays into a file and am trying to compile it with:

g++ main.cpp -o main -Wall -L/usr/local/include -L/usr/local/lib -lallegro_main -lallegro

(I have a makefile etc but this is what I've narrowed it down to.)

This compiles without errors, but when I run the executable I get:

dyld: Symbol not found: __al_mangled_main
Referenced from: /usr/local/lib/liballegro_main.5.0.dylib
Expected in: flat namespace
in /usr/local/lib/liballegro_main.5.0.dylib
Trace/BPT trap

What am I doing wrong? The necessary files should be present:

$ ls /usr/local/lib/liballegro.*
/usr/local/lib/liballegro.5.0.0.dylib
/usr/local/lib/liballegro.5.0.dylib
/usr/local/lib/liballegro.dylib

$ ls /usr/local/lib/liballegro_main.*
/usr/local/lib/liballegro_main.5.0.0.dylib
/usr/local/lib/liballegro_main.5.0.dylib
/usr/local/lib/liballegro_main.dylib

Evert

Member #794

November 2000

For C++, your main() function must be
int main(int argc, char **argv)
In particular,
int main(void)
will not work. This has to do with Allegro's name manging.

(EDIT: Ok, I see that the tutorial has this. Make sure you do too).

As an aside, you should set up and use pkg-config rather than passing the library flags to the compiler directly.

azerty_damned

Member #12,589

February 2011

Check this:

http://www.allegro.cc/manual/5/al_run_main