re PR testsuite/42843 (--enable-build-with-cxx plugin tests fail)

	PR testsuite/42843
	* Makefile.in (PLUGINCC): Define in terms of @CC@ / @CXX@
	(PLUGINCFLAGS): Define in terms of @CFLAGS@ / @CXXFLAGS@

From-SVN: r163833

gcc/ChangeLog

+2010-09-03  Joern Rennecke  <joern.rennecke@embecosm.com>
+
+	PR testsuite/42843
+	* Makefile.in (PLUGINCC): Define in terms of @CC@ / @CXX@
+	(PLUGINCFLAGS): Define in terms of @CFLAGS@ / @CXXFLAGS@
+
 2010-09-03  Marcin Baczynski  <marbacz@gmail.com>
 
 	* dwarf2out.c (file scope): Remove #if0'd code.

gcc/Makefile.in

@@ -330,11 +330,14 @@ enable_lto = @enable_lto@
 LTO_BINARY_READER = @LTO_BINARY_READER@
 LTO_USE_LIBELF = @LTO_USE_LIBELF@
 
-# Compiler needed for plugin support
-PLUGINCC = $(COMPILER)
-
-# Flags needed for plugin support
-PLUGINCFLAGS = $(COMPILER_FLAGS)
+# Compiler and flags needed for plugin support
+ifneq ($(ENABLE_BUILD_WITH_CXX),yes)
+PLUGINCC = @CC@
+PLUGINCFLAGS = @CFLAGS@
+else
+PLUGINCC = @CXX@
+PLUGINCFLAGS = @CXXFLAGS@
+endif
 
 # Libs and linker options needed for plugin support
 PLUGINLIBS = @pluginlibs@