autoconf 2.63 and newlib

[uglyoldbob]

I have been unable to compile newlib 1.16 with autoconf 2.63. Compiling with
binutils 2.19.1, gcc-4.3.2 modified source to work for my kernel.
I have tracked the issue to differences to the version of autoconf. It works
with autoconf 2.59 but fails with 2.63.
libgloss/doors/configure.in (copied from libgloss/libnosys/configure.in) is
exactly the same. I used binutils 2.18 with autoconf 2.59 and that worked.
Unfortunately, binutils 2.18 does not like my version of texinfo. I can't
remember which version of Ubuntu I was used when it compiled properly.
If I understand correctly, configure.in is passed to autoconf to produce
configure.
The differences in configure is where the issue is, because LIB_AC_PROG_CC
gets placed into the configure script directly and that is what causes the
error.
Ubuntu 9.04.
Using built-in specs.
Target: i486-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
4.3.3-5ubuntu4' --with-bugurl=file:///usr/share/doc/gcc-4.3/README.Bugs
--enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --enable-shared
--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --enable-nls
--with-gxx-include-dir=/usr/include/c++/4.3 --program-suffix=-4.3
--enable-clocale=gnu --enable-libstdcxx-debug --enable-objc-gc --enable-mpfr
--enable-targets=all --with-tune=generic --enable-checking=release
--build=i486-linux-gnu --host=i486-linux-gnu --target=i486-linux-gnu
Thread model: posix
gcc version 4.3.3 (Ubuntu 4.3.3-5ubuntu4) 
aclocal version 1.10.2
automake version 1.10.2

Not sure if I am forgetting anything. If I am, just let me know and I will
try to find out.
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