RE: glibc vs. newlib in build processes (was:BUG IN DYNAMIC LINKER ld.so)

[Yves Rutschle <y dot rutschle at indigovision dot com>]

[using newlib headers]
> What is needed is a way to get target-specific headers out of glibc
> cleanly, without having a crosscompiler installed first.
> 
> Since it all appears to be so easy for you, try this: go get a copy of
> a recent Linux disto, say Red Hat 7.1, and install it on a VIRGIN PC.
> No upgrades, wipe the whole thing and start from scratch.  Then give
> me a canned procedure for building powerpc-linux that somehow pulls
> "suitable headers and libraries" out of thin air.  The world will
> thank you.  I will thank you.  CrossGCC will thank you.  Hell, I bet
> even the glibc guys will thank you!

Well, I did just that for an arm-linux-gcc and I am certain I didn't use
newlib's headers. I have to agree with Kai here, using another operating
system's headers makes no sense.

As you mention, you can't get glibc's target specific headers
without a cross-compiler already working (which is indeed most
infortunate, and Kai's idea of having a pre-install would be
great.. Surely there is no need for a complete compiler to generate
those headers.) This is why the standard way is to build the
compiler first, for language C only. For that, you only need
the configured Linux headers (that you can get with only a native
compiler -- pfew), and you build the cross-compiler targeting
linux, without support for the libc (of course, it's not there
yet). When you have that one, you can compile glibc and get
your target-specific headers, and rebuild a complete compiler
if you like (you already are in a state where you can build
any C application for linux).
No newlib headers, ever.
There are details on http://www.armlinux.org/docs/toolchain/
that describes the procedure for arm-linux, but I don't see
why it would be any different for other linux targets.

My 2 pence..  :)
Y.



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