From: Michal Suchanek <hramrach@...>
Date: 2009-08-26T22:30:49+09:00
Subject: Re: OSX -flat_namespace issues show up in hitimes, nokogiri and 	amalgalite

2009/8/24 Michal Suchanek <hramrach@centrum.cz>:
> Hello
>
> Twolevel namespace is used for quite some time in fink. It 's one of
> the remaining build system adjustments in recent ruby.
>
> Until now there was nothing I could point at that breaks with flat
> namespace but twolevel namespace is the recommended linking on OS X
> since some version like 10.2 or 10.3 and it does not seem to break
> anything.
>
> Note the -Wl prefix which allows building extensions that use libtool.
>
> Thanks
>
> Michal
>
> --- configure.in        2007-04-18 12:49:43.000000000 +0200
> +++ configure.in        2007-04-19 14:23:04.000000000 +0200
> @@ -1052,7 +1052,7 @@
>        rhapsody*)      : ${LDSHARED='cc -dynamic -bundle -undefined suppress'}
>                        : ${LDFLAGS=""}
>                        rb_cv_dlopen=yes ;;
> -       darwin*)        : ${LDSHARED='cc -dynamic -bundle -undefined
> suppress -flat_namespace'}
> +       darwin*)        : ${LDSHARED='cc -dynamic -bundle
> -Wl,-undefined,dynamic_lookup -Wl,-multiply_defined,sup
> press'}
>                        : ${LDFLAGS=""}
>                        : ${LIBPATHENV=DYLD_LIBRARY_PATH}
>                        rb_cv_dlopen=yes ;;
>
>

It should get fixed in 1.8.8 hopefully.

It was rejected for earlier versions for compatibility reasons.

See http://redmine.ruby-lang.org/issues/show/1991

Thanks

Michal