From: Jeffrey 'jf' Lim <jfs.world@...>
Date: 2014-07-31T18:03:10+08:00
Subject: [ruby-core:64137] Ruby 2.1.2 (and 2.1.1 and probably others) assumes a libffi with 3 version numbers in extconf.rb

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As per subject.

If you have the latest libffi version (3.1) installed, fiddle wont be
configured.

The offending section in extconf.rb:
========
  7 pkg_config("libffi")
  8 if ver = pkg_config("libffi", "modversion")
  9   ver = ver.gsub(/-rc\d+/, '') # If ver contains rc version, just
ignored.
 10   $defs.push(%{-DRUBY_LIBFFI_MODVERSION=#{ '%d%03d' % ver.split('.') }})
 11 end
========

I'm not too sure what the idiomatic approach would be; how about the
following?

===============
--- ext/fiddle/extconf.rb.orig    2013-05-19 10:42:16.000000000 +0800
+++ ext/fiddle/extconf.rb    2014-07-31 18:00:47.000000000 +0800
@@ -7,7 +7,8 @@
 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('.')
}})
+  ver_split = ver.split('.')
+  $defs.push(%{-DRUBY_LIBFFI_MODVERSION=#{ ('%d' +
'%03d'*(versplit.length-1)) % versplit }})
 end

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

-jf

--
He who settles on the idea of the intelligent man as a static entity only
shows himself to be a fool.

Mensan / Full-Stack Technical Polymath / System Administrator
12 years over the entire web stack: Performance, Sysadmin, Ruby and Frontend

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<div dir=3D"ltr"><div><div><div>As per subject.<br><br></div>If you have th=
e latest libffi version (3.1) installed, fiddle wont be configured.<br><br>=
</div>The offending section in extconf.rb:<br>=3D=3D=3D=3D=3D=3D=3D=3D<br>=
=A0 7 pkg_config(&quot;libffi&quot;)<br>
=A0 8 if ver =3D pkg_config(&quot;libffi&quot;, &quot;modversion&quot;)<br>=
=A0 9=A0=A0 ver =3D ver.gsub(/-rc\d+/, &#39;&#39;) # If ver contains rc ver=
sion, just ignored.<br>=A010=A0=A0 $defs.push(%{-DRUBY_LIBFFI_MODVERSION=3D=
#{ &#39;%d%03d&#39; % ver.split(&#39;.&#39;) }})<br>
=A011 end<br>=3D=3D=3D=3D=3D=3D=3D=3D<br><br></div><div>I&#39;m not too sur=
e what the idiomatic approach would be; how about the following?<br><br>=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<br>--- ext/fiddle/extconf.rb.ori=
g=A0=A0=A0 2013-05-19 10:42:16.000000000 +0800<br>
+++ ext/fiddle/extconf.rb=A0=A0=A0 2014-07-31 18:00:47.000000000 +0800<br>@=
@ -7,7 +7,8 @@<br>=A0pkg_config(&quot;libffi&quot;)<br>=A0if ver =3D pkg_co=
nfig(&quot;libffi&quot;, &quot;modversion&quot;)<br>=A0=A0 ver =3D ver.gsub=
(/-rc\d+/, &#39;&#39;) # If ver contains rc version, just ignored.<br>
-=A0 $defs.push(%{-DRUBY_LIBFFI_MODVERSION=3D#{ &#39;%d%03d%03d&#39; % ver.=
split(&#39;.&#39;) }})<br>+=A0 ver_split =3D ver.split(&#39;.&#39;)<br>+=A0=
 $defs.push(%{-DRUBY_LIBFFI_MODVERSION=3D#{ (&#39;%d&#39; + &#39;%03d&#39;*=
(versplit.length-1)) % versplit }})<br>
=A0end<br>=A0<br>=A0unless have_header(&#39;ffi.h&#39;)<br>=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<br></div><div><br></div>-jf<br><br cle=
ar=3D"all"><div><div><div><div><div><div><div dir=3D"ltr">--<br>He who sett=
les on the idea of the intelligent man as a static entity only shows himsel=
f to be a fool.<br>
<br>Mensan / Full-Stack Technical Polymath / System Administrator<br>12 yea=
rs over the entire web stack: Performance, Sysadmin, Ruby and Frontend</div=
></div>
</div></div></div></div></div></div>

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