*new* problem

Altera_Forum · ‎06-20-2005

I'm trying to create a C++ application for uClinux. Really all I need to do is include a class that I created. If I make a pointer to the class and then try to create a new instance of it, I get erros. If I try to create a static instance of the class I get errors.

using new:

// Class name and then pointer name

Amd032 *p_AudioMem;

// Pointer name = new instance of my class

p_AudioMem = new Amd032;

errors:

(weird ones at the top to long to list)

undefined refernce to 'Amd032::Amd032()'

undefined reference to 'operator delete(void*)'

staticly:

Amd032 AudioMem;

Neither method works. Is there way around this? Does new work?

Thank you!!

Altera_Forum · ‎06-21-2005

--- Quote Start ---

originally posted by randog77@Jun 20 2005, 11:40 PM

i'm trying to create a c++ application for uclinux. really all i need to do is include a class that i created.

--- Quote End ---

gcc does support new http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/rolleyes.gif (duh!)

make certain that you use the C++ compiler:

g++ -o myprog -Wl,-efl2flt myfile.c

and not the gcc binary (C compiler).

If I were you, I'd think twice about writing C++ for a nommu arch http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/blink.gif but that might just be me ...

Altera_Forum · ‎06-21-2005

Hi

I had problems creating objects dynamically with new.

gcc compiles ok, but in runtime, my application crashes and uClinux restarts when it reach to new sentence.

If I change my application to use static objects, it works OK.

Any Idea?

Màrius

Altera_Forum · ‎06-21-2005

--- Quote Start ---

originally posted by mariusmm@Jun 21 2005, 01:12 PM

gcc compiles ok, but in runtime, my application crashes and uclinux restarts when it reach to new sentence.

--- Quote End ---

looks your program is using to much process memory (you cannot relocate with nommu). Try to add more stack space using flthdr.

Altera_Forum · ‎06-21-2005

In the Makefile if I change

DEBUG = 1

to

DEBUG = 0

my problem goes away. Strange.

Thanks!

Altera_Forum · ‎06-21-2005

mariusMM my program does the same thing as yours now. Dough! Crashes a the new allocation.

what is flthdr??

I looked for that as a C++ function, I found nothing.

Thanks!

Altera_Forum · ‎06-21-2005

flthdr is a nios2 console command.

It can increase stack size. I've not tested it yet.

Màrius

Altera_Forum · ‎06-22-2005

--- Quote Start ---

originally posted by randog77@Jun 21 2005, 05:11 PM

what is flthdr??

--- Quote End ---

I am using my own toolchain on GNU/Linux, but this tools should be available in a Windows install too.

$ flthdr
No input files provided
usage: flthdr  flat-file
       Allows you to change an existing flat file
       -p      : print current settings
       -z      : compressed flat file
       -d      : compressed data-only flat file
       -Z      : un-compressed flat file
       -r      : ram load
       -R      : do not RAM load
       -k      : kernel traced load (for debug)
       -K      : normal non-kernel traced load
       -s size : stack size
       -o file : output-file
                 (default is to modify input file)
$ flthdr -p interface
interface
    Magic:        bFLT
    Rev:          4
    Build Date:   Wed Jun 22 11:10:40 2005
    Entry:        0x44
    Data Start:   0xa080
    Data End:     0xedb8
    BSS End:      0x10e2c
    Stack Size:   0x1000
    Reloc Start:  0xedb8
    Reloc Count:  0x696
    Flags:        0x1 ( Load-to-Ram )
$ flthdr -s 8192 interface
$ flthdr -p interface
interface
    Magic:        bFLT
    Rev:          4
    Build Date:   Wed Jun 22 11:10:40 2005
    Entry:        0x44
    Data Start:   0xa080
    Data End:     0xedb8
    BSS End:      0x10e2c
    Stack Size:   0x2000
    Reloc Start:  0xedb8
    Reloc Count:  0x696
    Flags:        0x1 ( Load-to-Ram )