how to find the source of newlib?

Altera_Forum · ‎01-23-2005

I need to use the function select() or sleep(). But they are not implemented in newlib after checking the

doc of newlib. How could I do?

Where can I find the source code of newlib? in HLA?

Thanks

Neo

Altera_Forum · ‎01-23-2005

There is a usleep() function, included with the HAL. Regarding newlib, you can find it here:

http://sources.redhat.com/newlib/ (http://sources.redhat.com/newlib/)

I think there's also an option to add the sources during kit installation.

Cheers,

- slacker

Altera_Forum · ‎01-23-2005

slacker,

Is there a mmap() function in newlib? I found one in "libc/sys/linux/mmap.c". But I cannot find mman.h file from the newlib directory. Does it mean that I only could use that function when I am working on linux?

Thanks,

Neo

Altera_Forum · ‎01-24-2005

The source for the newlib shipped with the HAL is in $NIOS2KIT/bin/nios2-gnutools/src/newlib/newlib. You'll need to search for the file you want below there.

I wouldn't recommend using a different version of newlib since doing this can sometimes cause subtle bugs.

But as slacker has pointed out, usleep is implemented in the HAL rather than in newlib. There is no mmap function in the HAL because we don't have different memory spaces for kernel and user so using just the standard read/write functions is just as efficient.

Altera_Forum · ‎01-24-2005

Wombat,

Thanks for your clarification. At the very beginning, I am going to use mmap to implement the virtual mm, how can I do it now?

Thanks,

Neo