A C++ compiler is required for gtnets and ns3.

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 05b9c0e..8e9a8da 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,6 +4,9 @@ if(WIN32)
   SET(CMAKE_RC_COMPILER "windres")
 endif()
 project(SimGrid C)
+if (enable_gtnets OR enable_ns3)
+  enable_language(CXX)
+endif()
 
 set(CMAKE_C_FLAGS "" CACHE TYPE INTERNAL FORCE)
 set(CMAKE_CXX_FLAGS "" CACHE TYPE INTERNAL FORCE)