Re: "empty" Makefile

[Ralf Corsepius <ralf dot corsepius at rtems dot org>]

On Sun, 2005-09-11 at 03:50 -0400, Ethan Tira-Thompson wrote:
> And now for my own question...
> I'm trying to build a cross compiler from powerpc (host) to mips  
> (target).  Here's the script I'm running (PREFIX is set to /usr/local/ 
> OPEN_R_SDK_new, TARGET is mipsel-linux):

> ...and it will generator a no-op Makefile which has all empty targets.
> This seems to be because of line 1508 of configure:
> 1507:   mips*-*-linux*)
> 1508:     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
> 1509:    ;;
> If I comment out 1508, then the build can proceed as expected.
> 
> My question is, why is the package disabled for all of the mips  
> targets?

It isn't. 

newlib is disabled for mips*-*-linux*, but it isn't disabled for other
mips*-* targets (eg. mips-rtems, mips-elf etc.)

Probably, mips*-*-linux* uses glibc2 and doesn't use newlib.

>   Does the current newlib release not support mips, or is  
> this some kind of oversight?
It does support the mips architecture for a variety of OSes, 
but it doesn't support "Linux on mips".

> @@ -1505,7 +1505,7 @@
>       noconfigdirs="$noconfigdirs target-newlib ${libgcj}"
>       ;;
>     mips*-*-linux*)
> -    noconfigdirs="$noconfigdirs target-newlib target-libgloss"
> +#    noconfigdirs="$noconfigdirs target-newlib target-libgloss"
>       ;;
>     mips*-*-*)
>       noconfigdirs="$noconfigdirs gprof ${libgcj}"

Have a look at the snippet above: It means, mips*-*-linux* is not
supported by newlib.

Ralf