Add libsupc++ to sim/cxxtest configuration

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5296 42af7a65-404d-4744-a932-0658087f49c3

libxx/Kconfig

@@ -3,6 +3,8 @@
 # see misc/tools/kconfig-language.txt.
 #
 
+comment "Basic CXX Support"
+
 config HAVE_CXX
 	bool "Have C++ compiler"
 	default n
@@ -12,8 +14,6 @@ config HAVE_CXX
 
 if HAVE_CXX
 
-comment "Basic CXX Support"
-
 config HAVE_CXXINITIALIZE
 	bool "Have C++ initialization"
 	default n
@@ -50,5 +50,12 @@ config UCLIBCXX_IOSTREAM_BUFSIZE
 	int "IO Stream Buffer Size"
 	default 32
 
+config UCLIBCXX_HAVE_LIBSUPCXX
+	bool "Have libsupc++ (required)"
+	default y
+	---help---
+		Select if your toolchain provides libsupc++.  This option is required
+		at present because the built-in libsupc++ support is incomplete.
+
 endif
 endif