RequiresとBuildRequiresを削除。ImageMagickのバージョンを問わず使えるruby-RMagick。動作は未確認です。

gistfile1.txt

%{!?ruby_sitelib:       %global ruby_sitelib    %(ruby -rrbconfig -e "puts Config::CONFIG['sitelibdir']")}
%{!?ruby_sitearch:      %global ruby_sitearch   %(ruby -rrbconfig -e "puts Config::CONFIG['sitearchdir']")}
%{!?ruby_abiver:        %global ruby_abiver     %((echo "1.8"; ruby -rrbconfig -e "puts Config::CONFIG['ruby_version']" 2>/dev/null) | tail -1)}

%define         modname         RMagick
%define         repoid          47971

Name:           ruby-%{modname}
Version:        1.15.17
Release:        2%{?dist}
Summary:        Graphics Processing for Ruby and Ruby on Rails
Group:          Development/Languages

License:        MIT
URL:            http://rmagick.rubyforge.org/
Source0:        http://rubyforge.org/frs/download.php/%{repoid}/%{modname}-%{version}.tar.bz2
BuildRoot:      %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)

#Requires:      ruby(abi) = %{ruby_abiver}, ImageMagick = 6.2.8.0
#BuildRequires: ruby, ruby-devel, ImageMagick-devel >= 6.0.0
Requires:       ruby(abi) = %{ruby_abiver}
BuildRequires:  ruby, ruby-devel
Provides:       ruby(%{modname}) = %{version}-%{release}

%description
RMagick is an interface between the Ruby programming language and the
ImageMagick and GraphicsMagick image processing libraries.

%package        doc
Summary:        Documentation for %{name}
Group:          Documentation

%description doc
This package contains documentaton files for %{name}.

%prep
%setup -q -n %{modname}-%{version}

%build
%configure --with-so-dir=%{ruby_sitearch} --with-site-ruby=%{ruby_sitelib} --disable-htmldoc
make %{?_smp_mflags}

%install
rm -rf $RPM_BUILD_ROOT
ruby setup.rb install --prefix=$RPM_BUILD_ROOT

# Correct wrong permissions
chmod 755 $RPM_BUILD_ROOT%{ruby_sitearch}/%{modname}.so

# Switch from non-UTF-8 to UTF-8
sed -e 's@ISO-8859-1@UTF-8@' README.html | iconv -f iso-8859-1 -t utf-8 > README.html.iso
touch -r README.html README.html.iso
mv -f README.html.iso README.html

# At the correct shebank to the example files
for file in doc/ex/*.rb; do
  sed -e 's@/\(usr/local\|home/software/ruby-1.6.8\)/bin/ruby@%{_bindir}/ruby@g' $file > $file.new
  touch -r $file $file.new
  mv -f $file.new $file
done

%clean
rm -rf $RPM_BUILD_ROOT

%files
%defattr(-,root,root,-)
%doc ChangeLog README.html
%{ruby_sitelib}/%{modname}.rb
%{ruby_sitelib}/rvg/
%{ruby_sitearch}/%{modname}.so

%files doc
%defattr(-,root,root,-)
%doc doc/*

%changelog
* Sun Aug 02 2009 Robert Scheck <robert@fedoraproject.org> 1.15.17-2
- Added missing requirement to ruby(abi) = version (#514931 #c4)
- Added a fixed dependency for the ImageMagick version (#500565)

* Fri Jul 31 2009 Robert Scheck <robert@fedoraproject.org> 1.15.17-1
- Upgrade to 1.15.17
- Initial spec file for Fedora and Red Hat Enterprise Linux