Pervasive PSQL 8.5 and C++ On Linux

I'm migrating some of our applications from Windows to our
Linux servers. The programs are in C++. They always get a
segmentation fault in SQLDriverConnect(). I've created a very
simple program in both C and C++ that exhibits the problem.
Save as both prg_c.c and prg_cpp.cpp and compiled with:
    gcc -m32 -lodbc -o prg_c prg_c.c
    g++ -m32 -lodbc -o prg_cpp prg_cpp.c
(-m32 because the server is running 64-bit Linux and PSQL
only comes with 32-bit drivers.)

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#include <string.h>
#include <sql.h>
#include <sqlext.h>

int main(int argc, char **argv)
{
   SQLHENV henv;
   SQLHDBC hdbc;
   SQLCHAR dsn[120];
   short buflen;
   char buffer[257];
   int status;

   strcpy((char*)dsn, "DSN=Paragon");
   if (SQLAllocEnv (&henv) != SQL_SUCCESS)
     return -1;
   if (SQLAllocConnect (henv, &hdbc) != SQL_SUCCESS)
     return -1;
   status = SQLDriverConnect (hdbc, 0, dsn, SQL_NTS,
         (SQLCHAR*)buffer, sizeof (buffer), &buflen,
         SQL_DRIVER_COMPLETE);
   if (status != SQL_SUCCESS && status != SQL_SUCCESS_WITH_INFO)
     return -1;
   SQLDisconnect (hdbc);
   SQLFreeConnect (hdbc);
   SQLFreeEnv (henv);

   return 0;
}
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The straight C program runs fine. The C++ program blows in
the SQLDriverConnect() call.

I've tried both -lodbc and -liodbc and both fail at the same
place.

John