From: Arnaud Giersch <arnaud.giersch@iut-bm.univ-fcomte.fr>
Date: Sat, 27 Oct 2012 17:39:57 +0000 (+0200)
Subject: Optionally look for a Fortran compiler.
X-Git-Tag: v3_9_rc1~91^2~159
X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/commitdiff_plain/95cd71e835559251f778c5e3676a49e881172ba6

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 8e9a8daf42..e1f960b865 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,6 +7,13 @@ 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)
diff --git a/buildtools/Cmake/PrintArgs.cmake b/buildtools/Cmake/PrintArgs.cmake
index 8d501419c9..a6fd758539 100644
--- 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()
+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}")