I have a small program, test.c. It runs OK. This is on Linux (kernel
2.6.8.1, GCC 3.4.1).
I decided to convert it to C++ before expanding it to a larger program. I
changed the filename to test.cpp and added
extern "C" {
}
around main and all the non-static subroutines. It compiles OK, but when I
link it, it says:
test.o (.eh_frame+0x11 ): undefined reference to '__gxx_personal ity_v0'
My program makes no reference to __gxx_personali ty_v0.
What do I need to do to get this program to link as a C++ program?
Thanks,
Allie 4 75434
Albert Oppenheimer wrote: I have a small program, test.c. It runs OK. This is on Linux (kernel 2.6.8.1, GCC 3.4.1).
I decided to convert it to C++ before expanding it to a larger program. I changed the filename to test.cpp and added
extern "C" { }
around main and all the non-static subroutines. It compiles OK, but when I link it, it says:
test.o (.eh_frame+0x11 ): undefined reference to '__gxx_personal ity_v0'
My program makes no reference to __gxx_personali ty_v0.
What do I need to do to get this program to link as a C++ program?
This is platform specific, but try compiling (and linking) with "g++"
rather than "gcc." Or, when you link, make sure you specify the C++
library (which gcc does automatically if you use g++ as your command
line rather than gcc).
If you have further questions, you'll get better help asking in a
platform-specific newsgroup.
Best regards,
Tom
Albert Oppenheimer wrote: I have a small program, test.c. It runs OK. This is on Linux (kernel 2.6.8.1, GCC 3.4.1).
I decided to convert it to C++ before expanding it to a larger program. I changed the filename to test.cpp and added
extern "C" { }
around main and all the non-static subroutines. It compiles OK, but when I link it, it says:
test.o (.eh_frame+0x11 ): undefined reference to '__gxx_personal ity_v0'
My program makes no reference to __gxx_personali ty_v0.
What do I need to do to get this program to link as a C++ program?
Thanks, Allie
The __gxx part indicates that this is a g++-specific implementation
issue. The .eh_frame probably indicates that it is concerned with
exception handling, code for which may be automatically inserted for
C++ programs (but not for C). If so, you could disable exceptions with
a compiler flag or link in the proper symbols from a library that came
with your compiler (perhaps libstdc++?), which may not get pulled in
with your current compiler flags. As the other respondent said, any
follow-up should be directed to a GNU newsgroup see the FAQ for some
alternate newsgroups: http://www.parashift.com/c++-faq-lit...t.html#faq-5.9
Cheers! --M
Hello Albert,
Albert Oppenheimer wrote: I have a small program, test.c. It runs OK. This is on Linux (kernel 2.6.8.1, GCC 3.4.1).
I decided to convert it to C++ before expanding it to a larger program. I changed the filename to test.cpp and added
This already enough to make it a C++ program. GCC will automatically compile
it as a c++ program because of the cpp extension.
extern "C" { }
around main and all the non-static subroutines. It compiles OK, but when I link it, it says:
It's not necessary. Remove the extern "C" stuff and try again, it should
compile and link fine.
You need the extern "C" only if you are calling a C function, like printf()
from a C++ module. If you would like to know more, google for "name
mangling" and you should find good explanations for it and what it's for.
test.o (.eh_frame+0x11 ): undefined reference to '__gxx_personal ity_v0'
My program makes no reference to __gxx_personali ty_v0.
What do I need to do to get this program to link as a C++ program?
Thanks, Allie
hth Peter
Thanks, it linked and ran fine after I used g++. This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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