* lib/mkmf.rb (have_header): needs dependent headers if trying to

compile.

* ext/socket/extconf.rb: net/if.h depends on other headers.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@22103 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,10 @@
+Sat Feb  7 11:44:06 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* lib/mkmf.rb (have_header): needs dependent headers if trying to
+	  compile.
+
+	* ext/socket/extconf.rb: net/if.h depends on other headers.
+
 Sat Feb  7 04:02:37 2009  Tanaka Akira  <akr@fsij.org>
 
 	* dir.c (dir_read): don't disable rdoc.

ext/socket/extconf.rb

@@ -291,7 +291,7 @@ have_header("ifaddrs.h")
 have_func("getifaddrs")
 have_header("sys/ioctl.h")
 have_header("sys/sockio.h")
-have_header("net/if.h")
+have_header("net/if.h", headers)
 
 unless have_type("socklen_t", headers)
   $defs << "-Dsocklen_t=int"

lib/mkmf.rb

@@ -808,9 +808,9 @@ end
 # For example, if have_header('foo.h') returned true, then the HAVE_FOO_H
 # preprocessor macro would be passed to the compiler.
 #
-def have_header(header, &b)
+def have_header(header, preheaders = nil, &b)
   checking_for header do
-    if try_header(cpp_include(header), &b)
+    if try_header(cpp_include(preheaders)+cpp_include(header), &b)
       $defs.push(format("-DHAVE_%s", header.tr("a-z./\055", "A-Z___")))
       true
     else