[gentoo-alt] Prefix/Cygwin: zlib, GCC, which version?

[Al]

Hi,

after bootstrapping gcc-4.4.4-r1 re-emerging zlib displays this first

<snippy>
Checking for shared library support...
Tested i686-pc-cygwin1.7-gcc -w -c -O2 -pipe -fPIC ztest2672.c
Tested -O2 -pipe -fPIC -o ztest2672.so ztest2672.o
./configure: line 243: -O2: command not found
No shared library support; try without defining CC and CFLAGS
Building static library libz.a version 1.2.5 with i686-pc-cygwin1.7-gcc.
</snippy>

and breaks with this

<snippy>
cp libz.a /home/prefix/gentoo/var/tmp/portage/sys-libs/zlib-1.2.5-r2/image//home/prefix/gentoo/usr/lib
cp  /home/prefix/gentoo/var/tmp/portage/sys-libs/zlib-1.2.5-r2/image//home/prefix/gentoo/usr/lib
cp: missing destination file operand after
`/home/prefix/gentoo/var/tmp/portage/sys-libs/zlib-1.2.5-r2/image//home/prefix/gentoo/usr/lib'
</snippy>

Makefile gives the reason:

STATICLIB=libz.a
SHAREDLIB=
SHAREDLIBV=
SHAREDLIBM=
[...]
cp $(STATICLIB) $(DESTDIR)$(libdir)
cp $(SHAREDLIBV) $(DESTDIR)$(sharedlibdir)

Hence, $SHAREDLIBV has not been defined, that's why "cp" has only one
argument.  Configure detects no shared library support for
i686-pc-cygwin1.7-gcc at all.

What is going wrong here?

Is the error in zlib or in GCC?

How could I prove that GCC has a missing shared library support?

Do you suspect any of my settings wrong? They worked for the whole
bootstrapping process.

Could it be the version of GCC?
http://www.gentoo.org/proj/en/gentoo-alt/prefix/bootstrap-solaris.xml
suggests "=gcc-4.2*". Why?

Thank you very much

Al







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