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Re: [discuss] --with-sysroot required when building 32->64 bit crosstoolchain?(was: building a cross-compiler is hard)

Alan Modra wrote:
On Wed, Jan 07, 2004 at 08:06:15PM -0500, Raul Miller wrote:

On Wed, Jan 07, 2004 at 04:38:05PM -0800, Daniel Kegel wrote:

BTW, why do you build glibc twice?

I thought it was important at one point, but I forget why.

It's needed when bootstrapping glibc, ie. if you don't have a previous
libc and crt* files available.  The trouble is that building a shared
glibc requires crt* to build, and the glibc build machinery isn't
clever enough to pick up newly built crt* files.  Also, gcc's configure
makes use of AC_TRY_LINK, which again needs crt files.  :-(

I haven't run into those problems, I think. In, I do * install glibc headers * build bootstrap gcc * build and install glibc * build and install final gcc and I happily get a shared glibc that passes the glibc regression tests.

I seem to recall that one reason people used to build glibc twice was to get the
paths right, but that's not really neccessary if you
override install_root when doing 'make install' in glibc.

- Dan

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