This is the mail archive of the gcc-help@gcc.gnu.org mailing list for the GCC project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]

Re: problem linking with GCC 3.0 -- undefined reference to `std::codecvt<char, char, __mbstate_t>::id


Dear Claudio,

Thank you very much for the tip.  I tried what you suggested but I still have 
the problem.

Here is the procedure that I followed:

1. Remove gcc, binutils, and glibc from the /usr/local tree.

2. Built and installed gcc 3.0 using the old gcc (2.95.2-12mdk)
    and binutils (2.10.0.24-4mdk).

3. Tested C++ code.  Code compiled but attempts to run
    resulted in segmentation faults.

4. Rebuilt gcc 3.0 and binutils 2.11 using the new gcc
    and the old binutils.  An alternative would be to build gcc
    this way and then build binutils separately with gcc 3.0
    after recompiling gcc.

5. Tested C++ code.  Code compiled but would not execute.
    My fault since runtime linking referred to a non-existent linker.

6. Rebuilt glibc 2.2.3 with the new gcc and binutils.

7. Tested C++ code.  Linking failed with the same error as before.

The error is

admin4pgdb.o: In function `std::basic_streambuf<char, std::char_traits<char> 
>::overflow(int)':
/usr/local/include/g++-v3/bits/std_streambuf.h(.gnu.linkonce.t._ZSt9use_facetISt7codecvtIcc11__mbstate_tEERKT_RKSt6locale+0xc): 
undefined reference to `std::codecvt<char, char, __mbstate_t>::id'

Using the same means to investigate the offending object file and C++ library 
as in your message, I found

$ nm --demangle admin4pgdb.o | grep codecvt.*id
         U std::codecvt<char, char, __mbstate_t>::id

and

$ nm --demangle libstdc++.a | grep codecvt.*id
00000008 B std::codecvt<char, char, mbstate_t>::id
           U std::codecvt<char, char, mbstate_t>::id
           U std::codecvt<char, char, mbstate_t>::id

Any suggestions?  Thanks!

Mark


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]