Let mkmf's have_library specify headers

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
===================================================================
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
 
-def have_library(lib, func = nil, &b)
+def have_library(lib, func = nil, header=nil, &b)
   func = "main" if !func or func.empty?
   lib = with_config(lib+'lib', lib)
   checking_for "#{func}() in #{LIBARG%lib}" do
@@ -483,7 +483,7 @@
       true
     else
       libs = append_library($libs, lib)
-      if try_func(func, libs, &b)
+      if try_func(func, libs, header, &b)
         $libs = libs
         true
       else

-- 
Eric Hodel - [e-mail] - http://segment7.net
All messages signed with fingerprint:
FEC2 57F1 D465 EB15 5D6E  7C11 332A 551C 796C 9F04