[CT_NG] build fixes for glibc-2.3.6 and old systems

[Yann E. MORIN]

Hello again!

On Saturday 10 May 2008 15:55:54 Willy Tarreau wrote:
> When installing libc headers, the wrong compiler is used (CT_TARGET)
> instead of CT_BUILD, resulting in the headers not being built :

You're not going with linuxthreads, are you?

Building linuxthreads-based glibc is broken, as you just pointed out. Only
NPTL works (or should work) with glibc. It's a crosstool-NG limitation so
far.

In the case of NPTL, a cross-compiler, C-only, bare compiler is built before
the C library headers get installed. So we have a cross-compiler by that
time.

But in the case of linuxthreads, that X-compiler is not built. So we can't use
it to build necessary C library. Where it becomes quite strange (IMPOV) is that
linuxthreads *should* *not* require that compiler. Anyway, it didn't when
crosstool-NG didn't support building NPTL. Since the time I introduced NPTL
support, the linuxthreads builds broke.

Seems you just pointed me at the correct line, here! :-)

> I fixed it with the following patch :
> -    cross_cc=`CT_Which "${CT_TARGET}-gcc"`
> +    cross_cc=`CT_Which "${CT_BUILD}-gcc"`

Will be a bit more complex than just that, we'll just test wether we're
going NPTL or linuxthreads, and set the compiler accordingly.

This will have to wait a little bit, I have other, ARM-BE-EABI-uClibc problems
ATM.

Regards,
Yann E. MORIN.

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