macOS Linker broken?

[kperryua]

I'm trying to compile a very simple C++ program on the command line using gcc. It successfully creates the object files and all that, but the linker spits these errors out at me:

/usr/bin/ld: Undefined symbols:
std::basic_ostream<char, std::char_traits<char> >::operator<<(std::basic_ostream<char, std::char_traits<char> >& (*)(std::basic_ostream<char, std::char_traits<char> >&))
std::ios_base::Init::Init()
std::ios_base::Init::~Init()
std::cout
std::basic_ostream<char, std::char_traits<char> >& std::endl<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&)
std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)
___gxx_personality_v0
collect2: ld returned 1 exit status

This suggests to me that the linker for some reason can't find the C++ standard libraries. What's up with that? I swear it was working a week ago...

I installed Fink recently... might that have anything to do with it?

Anyone know a fix?

 

[WebMongol]

g++

Use C++ compiler (g++ or c++) to compile and link C++ program.

 

[ChrisBrightwell]

Use C++ compiler (g++ or c++) to compile and link C++ program.

g++ is just a symlink to gcc.

kperryua, can you build HelloWorld.cpp?

 

[WebMongol]

g++ is just a symlink to gcc.

kperryua, can you build HelloWorld.cpp?

Even if g++ and gcc are sym links to the same program (actually it's not true for Mac OS X 10.3.9) they behave differently depending which name was used for invocation.
g++ by default calls linker (ld) and specify C++ std library(-lstdc++).

One can do this explicitly by building C++ program with extra parameter: -lstdc++. So to compile C++ hello.cc one can use
g++ hello.cc -o hello1
OR
gcc hello.cc -lstdc++ -o hello2