gcc linker error

ghborrmann · 07-31-2006, 02:33 PM

I'm trying to compile a program using std::list, using a command line:
gcc myprog.cpp
and get the following error messages from the linker:

Quote:

/tmp/ccK55ZP7.o: In function `__malloc_alloc_template<0>::_S_oom_malloc(unsigned int)':
/tmp/ccK55ZP7.o(.__malloc_alloc_template<0>::gnu.linkonce.t._S_oom_malloc(unsigned int)+0x1a): undefined reference to `endl(ostream &)'
/tmp/ccK55ZP7.o(.__malloc_alloc_template<0>::gnu.linkonce.t._S_oom_malloc(unsigned int)+0x27): undefined reference to `cerr'
/tmp/ccK55ZP7.o(.__malloc_alloc_template<0>::gnu.linkonce.t._S_oom_malloc(unsigned int)+0x2c): undefined reference to `ostream:

perator<<(char const *)'
/tmp/ccK55ZP7.o(.__malloc_alloc_template<0>::gnu.linkonce.t._S_oom_malloc(unsigned int)+0x37): undefined reference to `ostream:

perator<<(ostream &(*)(ostream &))'
collect2: ld returned 1 exit status

I'm using Red Hat 7.3, if it makes any difference. I know I've used STL containers in the past with no problems; what's wrong here?

tuxdev · 07-31-2006, 03:08 PM

Post code please. I think by looking at the errors that you are missing the std:: scoping of the STL stuff. The evils of newbie books doing "using namespace std" strikes again!

dmail · 07-31-2006, 03:22 PM

Seeing as it's C++ you may also want to try "g++"

ghborrmann · 07-31-2006, 10:15 PM

Quote:

Seeing as it's C++ you may also want to try "g++"

Thanks for your suggestion. I tried g++ and it worked perfectly.

Quote:

Post code please. I think by looking at the errors that you are missing the std:: scoping of the STL stuff. The evils of newbie books doing "using namespace std" strikes again!

Thanks for your reply. No, I am not "using namespace std": I use std::list<MyClass> and std::list<MyClass>::const_iterator, and use only the default constructor and the push_front member functions. It appears to me that there is a missing library, but I can't figure out why the default libraries are not sufficient. As noted above, g++ apparently has no problem with the code, so my immediate problem is solved.