Question

I want to develop C++ programs on mac os and I have installed Xcode with a bunch of frameworks.

However I would like to write code without Xcode IDE but just write my own makefile and directly compile/link with gcc (shipped with Xcode).

Take a opengl program as example. I tried to compile it with the command:

gcc -I/usr/include/
-I/Developer/SDKs/MacOSX10.6.sdk/System/Library/Frameworks/GLUT.framework/Headers/
-I/Developer/SDKs/MacOSX10.6.sdk/System/Library/Frameworks/OpenGL.framework/Headers
-L/usr/lib -L/usr/X11/lib/ -L/Developer/SDKs/MacOSX10.6.sdk/System/Library/Frameworks/OpenGL.framework/Libraries/
-lGL -lGLU -lGLUTt main.cpp

or

gcc -I/usr/include/ -L/usr/lib
-framework OpenGL -framework GLUT -lm main.cpp

But they ended up with linking error

Undefined symbols:
“std::basic_ostream

::operator<<(long)”, referenced from:
reshape(int, int)in ccKBRSF9.o
display() in ccKBRSF9.o “___gxx_personality_v0”, referenced
from:
___gxx_personality_v0$non_lazy_ptr in ccKBRSF9.o
(maybe you meant: ___gxx_personality_v0$non_lazy_ptr) “std::ios_base::Init::~Init()”,
referenced from:
___tcf_0 in ccKBRSF9.o “std::basic_string,
std::allocator
::operator[](unsigned long) const”, referenced from:
std::__verify_grouping(char const*, unsigned long,
std::basic_string,
std::allocator > const&)in
ccKBRSF9.o
std::__verify_grouping(char const*, unsigned long,
std::basic_string,
std::allocator > const&)in
ccKBRSF9.o
std::__verify_grouping(char const*, unsigned long,
std::basic_string,
std::allocator > const&)in
ccKBRSF9.o “std::basic_ostream >&
std::operator<<

(std::basic_ostream >&, char
const*)”, referenced from:
keyboard(unsigned char, int, int)in ccKBRSF9.o
keyboard(unsigned char, int, int)in ccKBRSF9.o
keyboard(unsigned char, int, int)in ccKBRSF9.o
reshape(int, int)in ccKBRSF9.o
display() in ccKBRSF9.o “std::ios_base::Init::Init()”,
referenced from:
__static_initialization_and_destruction_0(int, int)in ccKBRSF9.o
“std::basic_string,
std::allocator >::size() const”,
referenced from:
std::__verify_grouping(char const*, unsigned long,
std::basic_string,
std::allocator > const&)in
ccKBRSF9.o “std::cout”, referenced
from:
__ZSt4cout$non_lazy_ptr in ccKBRSF9.o
(maybe you meant: __ZSt4cout$non_lazy_ptr) ld: symbol(s) not found collect2: ld returned 1 exit
status

Did I miss something?

Answer 1

Use g++ to compile C++. It’s the C++ front-end for GCC. E.g.:

g++ -I/usr/include/ -L/usr/lib -framework OpenGL -framework GLUT -lm main.cpp