gistfile1.diff

diff --git a/bin/rubyc b/bin/rubyc
index c14de80..cbb9448 100644
--- a/bin/rubyc
+++ b/bin/rubyc
@@ -16,6 +16,7 @@ class Compiler
     @archs = []
     @internal = argv.delete('--internal')
     @frameworks = %w{Foundation}
+    @linkf = []
 
     # Parse arguments.
     OptionParser.new do |opts|
@@ -26,6 +27,9 @@ class Compiler
       opts.on('--framework <name>', "Link standalone static executable with given framework") { |p| @frameworks << p }
       opts.on('--sdk <path>', "Use SDK when compiling standalone static executable") { |x| @sdk = x }
       opts.on('--dylib', "Create a dynamic library") { @dylib = true }
+      opts.on('--compatibility_version <VERSION>', "Compatibility Version for linking") { |ver| @linkf << "-compatibility_version #{ver}" }
+      opts.on('--current_version <VERSION>', "Current Version for linking") { |ver| @linkf << "-current_version #{ver}" }
+      opts.on('--install_name <NAME>', "Install Name for linking") { |name| @linkf << "-install_name #{name}" }
       opts.on('-C', 'Compile, assemble and link a loadable object file') { @bundle = true }
       opts.on('-a', '--arch <ARCH>', 'Compile for specified CPU architecture') { |arch| @archs << arch }
       opts.on('-v', '--version', 'Display the version') { puts RUBY_DESCRIPTION; exit 1 }
@@ -139,7 +143,7 @@ class Compiler
   end
 
   def cleanup
-    @tmpfiles.each { |x| File.delete(x) }
+    @tmpfiles.each { |x| File.delete(x) if File.exist?(x) }
   end
 
   private
@@ -224,9 +228,9 @@ EOS
     # Build.
     main = gen_tmpfile('main', 'c')
     File.open(main, 'w') { |io| io.write(main_txt) }
-    linkf = @internal ? "-L. -lmacruby" : "-L#{RbConfig::CONFIG['libdir']} -lmacruby"
+    @linkf << @internal ? "-L. -lmacruby" : "-L#{RbConfig::CONFIG['libdir']} -lmacruby"
     objs = objs_data.map { |obj, f| "\"#{obj}\"" }.join(' ') 
-    execute("#{@gcxx} \"#{main}\" -dynamiclib -dynamic -undefined suppress -flat_namespace #{arch_flags} #{linkf} #{objs} -o \"#{output}\"")
+    execute("#{@gcxx} \"#{main}\" -dynamiclib -dynamic -undefined suppress -flat_namespace #{arch_flags} #{@linkf.join(' ')} #{objs} -o \"#{output}\"")
     strip(output)
   end
 
diff --git a/rubyc.1 b/rubyc.1
index 75f0877..5a945ea 100644
--- a/rubyc.1
+++ b/rubyc.1
@@ -45,15 +45,6 @@ using a default file name which consists of the source file name with the .rbo f
 .Nm require
 method.
 .Pp
-.It Fl -dylib
-Create a dynamic library instead of an executable. This option compiles every Ruby source file passed to 
-.Nm macrubyc
-and produces a Mach-O dynamic library (.dylib). This library is compiled with a global constructor that will register every Ruby machine code file into the MacRuby runtime once it's loaded by the dynamic linker, at runtime. This library is intended to be linked against an executable that uses the MacRuby runtime, for example executables generated by
-.Nm macrubyc .
-The
-.Fl o
-option must be provided when building dynamic libraries.
-.Pp
 .It Fl h, Fl -help
 Display a short description of the command line options.
 .Pp
@@ -64,6 +55,26 @@ If this option is not given,
 .Nm macrubyc
 will try to determine a default output file name based on the object file type that is being generated. For executables, the default is a.out. For objects, the default is the original source file name with the object type extension. For dynamic libraries, this option is mandatory.
 .Pp
+.It Fl -dylib
+Create a dynamic library instead of an executable. This option compiles every Ruby source file passed to 
+.Nm macrubyc
+and produces a Mach-O dynamic library (.dylib). This library is compiled with a global constructor that will register every Ruby machine code file into the MacRuby runtime once it's loaded by the dynamic linker, at runtime. This library is intended to be linked against an executable that uses the MacRuby runtime, for example executables generated by
+.Nm macrubyc .
+The
+.Fl o
+option must be provided when building dynamic libraries.
+.Pp
+.Bl -tag -width XXXXXXXXXX
+The
+.Fl -dylib
+option can also take the following optional linker arguments (see
+.Xr libtool 1
+for more information):
+.It Fl -compatibility_version Ar VERSION
+.It Fl -current_version Ar VERSION
+.It Fl -install_name Ar NAME
+.El
+.Pp
 .It Fl -static
 Create a standalone, static executable. By default, executables created by
 .Nm macrubyc