Optionally look for a Fortran compiler.

[simgrid.git] / CMakeLists.txt

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d5fb113..e1f960b 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,7 +3,17 @@ cmake_minimum_required(VERSION 2.6)
 if(WIN32)
   SET(CMAKE_RC_COMPILER "windres")
 endif()
-project(SimGrid CXX C Fortran)
+project(SimGrid C)
+if (enable_gtnets OR enable_ns3)
+  enable_language(CXX)
+endif()
+# Workaround for a bug in cmake where enable_language does not work
+# well with OPTIONAL.
+# See http://www.cmake.org/Bug/print_bug_page.php?bug_id=9220
+if(DEFINED CMAKE_Fortran_COMPILER AND CMAKE_Fortran_COMPILER MATCHES "^$")
+  set(CMAKE_Fortran_COMPILER CMAKE_Fortran_COMPILER-NOTFOUND)
+endif()
+enable_language(Fortran OPTIONAL)
 
 set(CMAKE_C_FLAGS "" CACHE TYPE INTERNAL FORCE)
 set(CMAKE_CXX_FLAGS "" CACHE TYPE INTERNAL FORCE)