Packaging ruby-1.9.2p0

The current released ruby is 1.9.2p0.

I've installed as
    ./configure --prefix=/usr/lib/rpm
but adding --enable-shared, and bundling in some hints
for discovering cppflags/libs for ruby-1.9.2p0 are gonna
be needed.

I'm currently using scripts/ruby-config (in @rpm5.org cvs) for ruby-.1.9.2p0 hinting.

The problem with ruby-config is that RPM_CHECK_LIB picks up ruby-config hinting
from PATH, which isn't quite right when targeting multiple ruby versions installed
on different paths. Likely alternative forms of hinting (both pkgconfig/*.la hinting are used
by RPM_CHECK_LIB).

Re-packaging ruby-1.8.6 (from rhel6) would also be useful. The include files
are in /usr/lib/ruby/1.8/i386-linux of all places. At least ruby-1.9.2p0 starts
to use /usr/include/ruby-1.9.1 (yes 1.9.2p0 uses "1.9.1" whatever) which
might be reasonably retrofitted back to ruby-1.8.6.

Also note that ruby-1.8.6 has HAVE_THIS and HAVE_THAT AutoFu from
its own private config.h.

And there are name space pollution and odd-ball prototyping (ANYARGS? is that C++)
issues that need to be whacked out like this (from rpmio/rpmruby.c):

/* XXX ruby-1.8.6 grrr, ruby.h includes its own config.h too. */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#undef PACKAGE_NAME
#undef PACKAGE_TARNAME
#undef PACKAGE_VERSION
#undef PACKAGE_STRING
#undef PACKAGE_BUGREPORT

#undef xmalloc
#undef xcalloc
#undef xrealloc
#pragma GCC diagnostic ignored "-Wstrict-prototypes"
#include <ruby.h>
#pragma GCC diagnostic warning "-Wstrict-prototypes"

#if !defined(RSTRING_PTR)
/* XXX retrofit for ruby-1.8.5 in CentOS5 */
#define RSTRING_PTR(s) (RSTRING(s)->ptr)
#define RSTRING_LEN(s) (RSTRING(s)->len)
#endif