Optionally look for a Fortran compiler.

Without that, CMake complains that it "cannot determine link language"
for Fortran targets.

This is not perfect: cmake is run systematically when doing make :(

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8e9a8da..e1f960b 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,6 +7,13 @@ project(SimGrid C)
 if (enable_gtnets OR enable_ns3)
   enable_language(CXX)
 endif()
 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)
 
 set(CMAKE_C_FLAGS "" CACHE TYPE INTERNAL FORCE)
 set(CMAKE_CXX_FLAGS "" CACHE TYPE INTERNAL FORCE)

diff --git a/buildtools/Cmake/PrintArgs.cmake b/buildtools/Cmake/PrintArgs.cmake
index 8d50141..a6fd758 100644 (file)
--- a/buildtools/Cmake/PrintArgs.cmake
+++ b/buildtools/Cmake/PrintArgs.cmake
@@ -85,6 +85,10 @@ if(CMAKE_CXX_COMPILER)
   message("        Compiler: C++ .......: ${CMAKE_CXX_COMPILER}")
   message("                version .....: ${COMPILER_CXX_VERSION}")
 endif()
   message("        Compiler: C++ .......: ${CMAKE_CXX_COMPILER}")
   message("                version .....: ${COMPILER_CXX_VERSION}")
 endif()

+if(CMAKE_Fortran_COMPILER)
+  message("        Compiler: Fortran ...: ${CMAKE_Fortran_COMPILER}")
+  message("                version .....: ${COMPILER_Fortran_VERSION}")
+endif()

 message("        Linker: .............: ${CMAKE_LINKER}")
 message("")
 message("        CFlags ..............: ${CMAKE_C_FLAGS}")
 message("        Linker: .............: ${CMAKE_LINKER}")
 message("")
 message("        CFlags ..............: ${CMAKE_C_FLAGS}")