From: Eric Hodel <drbrain@...7.net>
Date: 2004-09-12T16:35:04+09:00
Subject: Let mkmf's have_library specify headers

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I was trying to build GDChart, but its extconf.rb was unable to find
libgdc because the conftest.c that mkmf builds did not have the right
headers.  try_func, which builds conftest.c allows specification of
headers, but have_library does not allow them to be specified.  The
following patch allows a list of headers to be passed to try_func from
have_library.

Index: lib/mkmf.rb
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
RCS file: /src/ruby/lib/mkmf.rb,v
retrieving revision 1.195
diff -u -r1.195 mkmf.rb
--- lib/mkmf.rb 20 Aug 2004 21:41:31 -0000      1.195
+++ lib/mkmf.rb 12 Sep 2004 07:33:22 -0000
@@ -475,7 +475,7 @@
   r
 end
=20
-def have_library(lib, func =3D nil, &b)
+def have_library(lib, func =3D nil, header=3Dnil, &b)
   func =3D "main" if !func or func.empty?
   lib =3D with_config(lib+'lib', lib)
   checking_for "#{func}() in #{LIBARG%lib}" do
@@ -483,7 +483,7 @@
       true
     else
       libs =3D append_library($libs, lib)
-      if try_func(func, libs, &b)
+      if try_func(func, libs, header, &b)
         $libs =3D libs
         true
       else

--=20
Eric Hodel - drbrain@segment7.net - http://segment7.net
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