[gentoo-alt] How important is bootstrap_zlib_core()'s set target?

[René Berber]

Hi,

I'm trying to bootstrap prefix into my NAS (Synology 713+), which has 
Linux 3.2.30 64-bit, but everything (programs, libraries) 32-bit, and no 
compiler, headers, etc. a bare-bones distribution.

I've installed a compiler (gcc 4.2.1), and its dependencies, also bash, 
coreutils.  The compiler is 32-bit exclusively (i.e. no -m64, no 64-bit 
runtime).

Running the bootstrap script it fails in bootstrap_zlib_core() trying to 
build a 64-bit target.

Is that target really important?

If I disable the line responsible:

@@ -798,7 +798,7 @@
                 # hence we need to make sure that we really bootstrap this
                 # 64-bits (in contrast to the tools which we don't care 
if they
                 # are 32-bits)
-               export CC="gcc -m64"
+               export CC="gcc "
         elif [[ ${CHOST} == i?86-*-* ]] ; then
                 # This is important for bootstraps which are 64-native, 
but we
                 # want 32-bits, such as most Linuxes, and more recent OSX.

Then the bootstrap proceeds, and fails on stage 3 trying to build gcc 
4.2.4-r01.4, but that failure is because... "cannot find -lmpfr", which 
is never made by itself, and I don't see the source being unpacked 
inside gcc's source (so it gets made in the process).
-- 
René Berber