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Altera_Forum's avatar
Altera_Forum
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21 years ago

C++ Application

I was hoping someone out there is using Standard C++ on the Nios II. I can compile, link, and add to the filesystem the following code: # include <stdio.h> // hello_nios.cpp int main(int argc...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
21 years ago

You might run into an error like 

In function `__gnu_cxx::__verbose_terminate_handler()&#39;:
/build/nios2/bin/nios2-gnutools/src/gcc/libstdc++-v3/libsupc++/vterminate.cc:68:
 undefined reference to `_impure_ptr&#39;

The reason for this error is that libsupc++ from the toolchain was built with newlib header files, which define stderr as _impure_ptr->stderr. A possible workaround is to put a dummy _impure_ptr somewhere in the application: 

#include <stdio.h>
struct __myreent
{
  int _errno;
  FILE *_stdin, *_stdout, *_stderr;
};
static struct __myreent __myblock = {
 0, stdin, stdout, stderr
};
struct __myreent *_impure_ptr=&__myblock;