Trouble using SFML with GCC and OS X - c++

Question

I've been trying to get SFML working for a while now and I've been trying to get it working using GCC. I'm on OS X by the way. I followed the standard Linux instructions and using the Linux 64-bit download however when it comes to compiling...
g++ -o testing main.cpp -lsfml-system
This happens:
main.cpp: In function ‘int main()’:
main.cpp:7: error: ‘class sf::Clock’ has no member named ‘GetElapsedTime’
main.cpp:9: error: ‘class sf::Clock’ has no member named ‘GetElapsedTime’
main.cpp:10: error: ‘Sleep’ is not a member of ‘sf’
So I thought it could be due to not using includes, so I changed my gcc compile command to:
g++ -o testing main.cpp -I ~/SFML-1.6/include/ -lsfml-system
and now I'm getting this error:
ld: warning: ignoring file /usr/local/lib/libsfml-system.so, file was built for unsupported file format which is not the architecture being linked (x86_64)
Undefined symbols for architecture x86_64:
"sf::Clock::Clock()", referenced from:
_main in ccZEiB7b.o
"sf::Clock::GetElapsedTime() const", referenced from:
_main in ccZEiB7b.o
"sf::Sleep(float)", referenced from:
_main in ccZEiB7b.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status**
And I have no idea what to do to fix it.

Answer 1

Short answer
Add the -arch i386 (on mac) or -m32 (on linux) flag
Long answer
Your sfml-system library was built in 32 bits whereas you are trying to compile your program in 64 bits. So your program cannot link to the library.
Recompile SFML in 64 bits if possible and you should be able to compile your program in 64 bits.

Answer 2

SFML expects you to use frameworks on OS X. Open the SFML folder and copy all the folders under lib64 to /Library/Frameworks (that is, copy SFML.framework, sfml-system.framework, etc. to /Library/Frameworks).
Once you've installed the frameworks, you can use them by passing the -framework command to g++ like so:
g++ -o testing main.cpp -framework SFML -framework sfml-system