[MacPorts] #44508: ruby21: fix compilation with libffi (*3.1!) so that module fiddle works

[MacPorts]

#44508: ruby21: fix compilation with libffi (*3.1!) so that module fiddle works
-------------------------+--------------------------------
 Reporter:  jfs.world@…  |      Owner:  macports-tickets@…
     Type:  defect       |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:  2.3.1
 Keywords:               |       Port:
-------------------------+--------------------------------
 To confirm:

 {{{
 ruby2.1 -e 'p require "fiddle"'
 }}}

 Correctly configured and compiled, the output should be
 {{{
 true
 }}}

 NOTE: this patch is only for libffi 3.1, and should be removed once libffi
 goes to 3 numbers in its version. It is, of course best fixed upstream,
 and I will deal with that and report back once it's solved there. Until
 then, this patch will fix things.


 {{{
 --- ext/fiddle/extconf.rb.orig  2013-05-19 10:42:16.000000000 +0800
 +++ ext/fiddle/extconf.rb       2014-07-31 16:26:56.000000000 +0800
 @@ -7,7 +7,7 @@
  pkg_config("libffi")
  if ver = pkg_config("libffi", "modversion")
    ver = ver.gsub(/-rc\d+/, '') # If ver contains rc version, just
 ignored.
 -  $defs.push(%{-DRUBY_LIBFFI_MODVERSION=#{ '%d%03d%03d' % ver.split('.')
 }})
 +  $defs.push(%{-DRUBY_LIBFFI_MODVERSION=#{ '%d%03d' % ver.split('.') }})
  end

  unless have_header('ffi.h')
 }}}

-- 
Ticket URL: <https://trac.macports.org/ticket/44508>
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