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C++ on VxWorks

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Christopher J. Slominski

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May 28, 1999, 3:00:00 AM5/28/99

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VxWorks Users,
I am starting a new project and I am consisdering whether to use C or
C++. I have installed my MVME2604, downloaded boot code into FLASH, and setup
the VxWorks environment on my Windows NT personal computer. I am trying simple
applications to see how C++ development goes. I have rebuilt VxWorks with
INCLUDE_CPLUS and INCLUDE_CPLUS_IOSTREAMS. I use the default makefile which
does the compile and munching for me. My VxWorks target is set to "automatic"
static constructor instantiation as seen by cplusStratShow(). I can write to
the console with printf(), but not 'cout'. I also lock up the target when I
attempt to load a module with a static class object (ld < run.out). If I make
the object local to a function, it loads and runs fine (except for no 'cout'
output). I have included the sample code below. I know a lot of C++
development under VxWorks is going on, so I must not have things set up
correctly. Can anyone give me some hints on my particular problems, and also
lend advice in general in planning C++ development with VxWorks?

<<test.h>>
#ifndef TEST_H
#define TEST_H

class Tester
{
public:
Tester(void);
~Tester(void);
void Execute(void);
};

#endif

<< test.cpp>>
#include "VxWorks.h"
#include "test.h"
#include "iostream.h"
#include "stdio.h"

Tester::Tester(void) {}

Tester::~Tester(void) {}

void Tester::Execute(void)
{ printf("printf\n"); // This works
cout << "cout\n"; // This does not
}

<<run.cpp>>
#include "VxWorks.h"
#include "test.h"
#include "linklist.h"
#include "stdio.h"

int run(void)
{
Tester testIt;

// When the following line is placed above the function with 'static' to give
it global file scope, it causes
// "ld<run.out" to bomb the target.
LinkList<char *> names;

testIt.Execute(); // Do printf & cout samples

names.Insert("Eric"); // Insert names into the linked list.
names.Insert("Ryan");
names.Insert("Alex");

// Traverse the linked list printing the names (this works).

char **pptr = names.Top();
while (pptr != NULL)
{ printf("%s\n", *pptr);
pptr = ++names;
}

return 0x00fe; // This is the code I get returned to the
shell after "->run ".
}

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Content-Type: text/html; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

<html><div>VxWorks Users,</div>
<div>     I am starting a new project and I am
consisdering whether to use C or C++.  I have installed my MVME2604,
downloaded boot code into FLASH, and setup the VxWorks environment on my
Windows NT personal computer.  I am trying simple applications to
see how C++ development goes.  I have rebuilt VxWorks with
INCLUDE_CPLUS and INCLUDE_CPLUS_IOSTREAMS.  I use the default
makefile which does the compile and munching for me.  My VxWorks
target is set to "automatic" static constructor instantiation
as seen by cplusStratShow().  I can write to the console with
printf(), but not 'cout'.  I also lock up the target when I attempt
to load a module with a static class object (ld < run.out).  If I
make the object local to a function, it loads and runs fine (except for
no 'cout' output).  I have included the sample code below.  I
know a lot of C++ development under VxWorks is going on, so I must not
have things set up correctly.  Can anyone give me some hints on my
particular problems, and also lend advice in general in planning C++
development with VxWorks?</div>
<br>
<div><<test.h>></div>
<div>#ifndef TEST_H</div>
<div>#define TEST_H</div>
<br>
<div>class Tester</div>
<div>{</div>
<div>  public:</div>
<div>    Tester(void);</div>
<div>    ~Tester(void);</div>
<div>    void Execute(void);</div>
<div>};</div>
<br>
<div>#endif</div>
<br>
<div><< test.cpp>></div>
<div>#include "VxWorks.h"</div>
<div>#include "test.h"</div>
<div>#include "iostream.h"</div>
<div>#include "stdio.h"</div>
<br>
<div>Tester::Tester(void) {}</div>
<br>
<div>Tester::~Tester(void) {}</div>
<br>
<div>void Tester::Execute(void)</div>
<div>{
printf("printf\n");       &nbsp=
;         
// This works</div>
<div>  cout <<
"cout\n";         &nb=
sp;     
// This does not</div>
<div>}</div>
<br>
<div><<run.cpp>></div>
<div>#include "VxWorks.h"</div>
<div>#include "test.h"</div>
<div>#include "linklist.h"</div>
<div>#include "stdio.h"</div>
<br>
<br>
<div>int run(void)</div>
<div>{</div>
<div>  Tester testIt;</div>
<br>
<div>  // When the following line is placed above the function with
'static' to give it global file scope, it causes</div>
<div>  // "ld<run.out" to bomb the target.</div>
<div>  LinkList<char *> names;</div>
<br>
<div> 
testIt.Execute();         &nbsp=
;         
// Do printf & cout samples</div>
<br>
<div> 
names.Insert("Eric");       &nb=
sp;    
// Insert names into the linked list.</div>
<div>  names.Insert("Ryan");</div>
<div>  names.Insert("Alex");</div>
<br>
<div>  // Traverse the linked list printing the names (this
works).</div>
<br>
<div>  char **pptr =3D names.Top();</div>
<div>  while (pptr !=3D NULL)</div>
<div>  { printf("%s\n", *pptr);</div>
<div>    pptr =3D ++names;</div>
<div>  }</div>
<br>
<div>  return
0x00fe;           &nb=
sp;     
// This is the code I get returned to the shell after "->run
".</div>
<div>}</div>
<br>

--=====================_1980427133==_.ALT--

Roberto Nunnari

unread,

Jun 7, 1999, 3:00:00 AM6/7/99

to Christopher J. Slominski

Hi Christopher,

about 'cout'...
cout << "cout\n";
doesn't necessarely flush the output stream.

Try
cout << "cout" << endl;
or
cout << "cout"; cout.flush();

Best regards.
--
Roberto Nunnari -software engineer-
mailto:roberto...@agie.ch
AGIE - http://www.agie.com
Via dei pioppi 16 tel: +41-91-8069138
6616 Losone """
Switzerland (o o)
=======================oOO==(_)==OOo========================
MY OPNIONS ARE NOT NECESSARELY THOSE OF MY EMPLOYER

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