re PR c/46902 (gcc.dg/plugin/plugindir*.c gives ICEs on powerpc-apple-darwin9)

	PR gcc/46902
	PR testsuite/46912
	* plugin.c: Move include of dlfcn.h from here...
	* system.h: ... to here.

From-SVN: r168611

gcc/ChangeLog

-2010-01-09  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>
+2011-01-09  Iain Sandoe  <iains@gcc.gnu.org>
+
+	PR gcc/46902
+	PR testsuite/46912
+	* plugin.c: Move include of dlfcn.h from here...
+	* system.h: ... to here.
+
+2011-01-09  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>
 
 	* doc/cpp.texi (C++ Named Operators): Fix markup for header
 	file name.

gcc/plugin.c

@@ -22,15 +22,6 @@ along with GCC; see the file COPYING3.  If not see
 
 #include "config.h"
 #include "system.h"
-
-/* If plugin support is not enabled, do not try to execute any code
-   that may reference libdl.  The generic code is still compiled in to
-   avoid including too many conditional compilation paths in the rest
-   of the compiler.  */
-#ifdef ENABLE_PLUGIN
-#include <dlfcn.h>
-#endif
-
 #include "coretypes.h"
 #include "diagnostic-core.h"
 #include "tree.h"

gcc/system.h

@@ -583,6 +583,11 @@ extern int vsnprintf(char *, size_t, const char *, va_list);
 # endif
 #endif
 
+#if defined (ENABLE_PLUGIN) && defined (HAVE_DLFCN_H)
+/* If plugin support is enabled, we could use libdl.  */
+#include <dlfcn.h>
+#endif
+
 /* Get libiberty declarations.  */
 #include "libiberty.h"