wampcc: needs C++

Fixes:
 - http://autobuild.buildroot.net/results/b47daa2f7df44109b839b07d282d4f5b5123533c

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/wampcc/Config.in

@@ -1,5 +1,6 @@
 config BR2_PACKAGE_WAMPCC
 	bool "wampcc"
+	depends on BR2_INSTALL_LIBSTDCPP
 	depends on BR2_TOOLCHAIN_HAS_THREADS_NPTL # libuv
 	depends on BR2_USE_MMU # libuv
 	depends on !BR2_STATIC_LIBS # libuv
@@ -14,10 +15,11 @@ config BR2_PACKAGE_WAMPCC
 
 	  https://github.com/darrenjs/wampcc
 
-comment "wampcc needs a toolchain w/ NPTL, dynamic library"
+comment "wampcc needs a toolchain w/ C++, NPTL, dynamic library"
 	depends on BR2_USE_MMU
 	depends on BR2_TOOLCHAIN_HAS_SYNC_4
-	depends on !BR2_TOOLCHAIN_HAS_THREADS_NPTL || BR2_STATIC_LIBS
+	depends on !BR2_INSTALL_LIBSTDCPP || \
+		!BR2_TOOLCHAIN_HAS_THREADS_NPTL || BR2_STATIC_LIBS
 
 comment "wampcc needs a toolchain not affected by GCC bug 64735"
 	depends on BR2_USE_MMU