X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/a55549d1f97905cec49c509245ff7a0cc1559a42..2ba8549e0a8371efc09c66bad197097f88d93366:/CMakeLists.txt

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9c1da7af87..dae34bc442 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,18 +1,45 @@
+# Build the version number
+
+set(SIMGRID_VERSION_MAJOR "3")
+set(SIMGRID_VERSION_MINOR "26")
+set(SIMGRID_VERSION_PATCH "1") # odd => git branch; even => stable release or released snapshot
+
+if(${SIMGRID_VERSION_PATCH} EQUAL "0")
+  set(release_version "${SIMGRID_VERSION_MAJOR}.${SIMGRID_VERSION_MINOR}")
+else()
+  set(release_version "${SIMGRID_VERSION_MAJOR}.${SIMGRID_VERSION_MINOR}.${SIMGRID_VERSION_PATCH}")
+endif()
+
+message(STATUS "Configuring SimGrid v${release_version}")
+
+set(SIMGRID_VERSION_STRING "SimGrid version ${release_version}")
+
+set(libsimgrid_version "${release_version}")
+set(libsimgrid-java_version "${release_version}")
+
+# Basic checks on cmake
 cmake_minimum_required(VERSION 3.5)
+#for lto, to avoid warning (should be removed when switching to requiring cmake >= 3.9)
+if(NOT CMAKE_VERSION VERSION_LESS "3.9")
+  cmake_policy(SET CMP0069 NEW)
+endif()
 message(STATUS "Cmake version ${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION}.${CMAKE_PATCH_VERSION}")
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_HOME_DIRECTORY}/tools/cmake/Modules)
 
-project(SimGrid C CXX)
+project(simgrid C CXX)
+
+# customizable installation directories
+include(GNUInstallDirs)
+
+## Save compiler flags preset with environment variables CFLAGS or CXXFLAGS;
+## they will used within smpicc, smpicxx.
+## Do it early so that we get their genuine values. The same will be done later for Fortran.
+string(REGEX REPLACE " *-f[a-z]+-prefix-map=[^ ]*" "" SMPI_C_FLAGS "${CMAKE_C_FLAGS}")
+string(REGEX REPLACE " *-f[a-z]+-prefix-map=[^ ]*" "" SMPI_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
 
 #-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#
 #     Check for the compiler        #
 #-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#
-
-### Need to set rc ccompiler before enable language
-if(WIN32)
-  SET(CMAKE_RC_COMPILER "windres")
-endif()
-
 ## 
 ## Check the C/C++ standard that we need
 ##   See also tools/cmake/Flags.cmake that sets our paranoid warning flags
@@ -22,18 +49,17 @@ CHECK_C_COMPILER_FLAG(-fstack-cleaner HAVE_C_STACK_CLEANER)
 ## Request full debugging flags
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -g3")
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g3")
-set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -g")
 
 if (CMAKE_COMPILER_IS_GNUCC)    
-  if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS "4.7")
+  if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS "5.0")
     message(FATAL_ERROR
-            "SimGrid needs at least g++ version 4.7 to compile but you have ${CMAKE_CXX_COMPILER_VERSION}."
-            "You need a sufficient support of c++11 to compile SimGrid.")
+            "SimGrid needs at least g++ version 5.0 to compile but you have ${CMAKE_CXX_COMPILER_VERSION}."
+            "You need a sufficient support of c++14 to compile SimGrid.")
   endif()
 endif()
 
-## We need a decent support of the C++11 and C11 standards
-set(CMAKE_CXX_STANDARD 11)
+## We need a decent support of the C++14 and C11 standards
+set(CMAKE_CXX_STANDARD 14)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 set(CMAKE_C_STANDARD 11)
@@ -80,34 +106,16 @@ if ((NOT DEFINED enable_smpi) OR enable_smpi)
       set(SMPI_Fortran_LIBS "")
       set(SMPI_FLANG 1)
     endif()
+    string(REGEX REPLACE " *-f[a-z]+-prefix-map=[^ ]*" "" SMPI_Fortran_FLAGS "${SMPI_Fortran_FLAGS} ${CMAKE_Fortran_FLAGS}")
+
+    ## Request debugging flags for Fortran too
+    set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -g")
 
     set(SMPI_FORTRAN 1)
   endif(CMAKE_Fortran_COMPILER)
 
 endif()
 
-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#
-#     Build the version number      #
-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#
-
-set(SIMGRID_VERSION_MAJOR "3")
-set(SIMGRID_VERSION_MINOR "22")
-set(SIMGRID_VERSION_PATCH "90")
-set(SIMGRID_VERSION_EXTRA "-DEVEL") # Extra words to add to version string (e.g. -rc1)
-
-set(SIMGRID_VERSION_DATE  "2019") # Year for copyright information
-
-if(${SIMGRID_VERSION_PATCH} EQUAL "0")
-  set(release_version "${SIMGRID_VERSION_MAJOR}.${SIMGRID_VERSION_MINOR}")
-else()
-  set(release_version "${SIMGRID_VERSION_MAJOR}.${SIMGRID_VERSION_MINOR}.${SIMGRID_VERSION_PATCH}")
-endif()
-
-set(SIMGRID_VERSION_STRING "SimGrid version ${release_version}${SIMGRID_VERSION_EXTRA}")
-
-set(libsimgrid_version "${release_version}")
-set(libsimgrid-java_version "${release_version}")
-
 ### SET THE LIBRARY EXTENSION 
 if(APPLE)
   set(LIB_EXE "dylib")
@@ -118,7 +126,7 @@ else()
   set(LIB_EXE "so")
 endif()
 
-execute_process(COMMAND ${CMAKE_LINKER} -version OUTPUT_VARIABLE LINKER_VERSION ERROR_VARIABLE LINKER_VERSION)
+execute_process(COMMAND ${CMAKE_LINKER} -v OUTPUT_VARIABLE LINKER_VERSION ERROR_VARIABLE LINKER_VERSION)
 string(REGEX MATCH "[0-9].[0-9]*" LINKER_VERSION "${LINKER_VERSION}")
 
 ### Find programs and paths
@@ -129,12 +137,20 @@ if(NOT PERL_FOUND)
 endif()
 
 # tesh.py needs python 3 (or the module python-subprocess32 on python2.8+)
-set(PythonInterp_FIND_VERSION 3)
-set(PythonInterp_FIND_VERSION_COUNT 1)
-set(PythonInterp_FIND_VERSION_MAJOR 3)
-include(FindPythonInterp)
-if(NOT PYTHONINTERP_FOUND)
-  message(FATAL_ERROR "Please install Python (version 3 or higher) to compile SimGrid.")
+if(CMAKE_VERSION VERSION_LESS "3.12")
+  set(PythonInterp_FIND_VERSION 3)
+  set(PythonInterp_FIND_VERSION_COUNT 1)
+  set(PythonInterp_FIND_VERSION_MAJOR 3)
+  include(FindPythonInterp)
+  if(NOT PYTHONINTERP_FOUND)
+    message(FATAL_ERROR "Please install Python (version 3 or higher) to compile SimGrid.")
+  endif()
+else()
+  find_package(Python3 COMPONENTS Interpreter Development)
+  if(NOT Python3_Interpreter_FOUND)
+    message(FATAL_ERROR "Please install Python (version 3 or higher) to compile SimGrid.")
+  endif()
+  set(PYTHON_EXECUTABLE ${Python3_EXECUTABLE})
 endif()
 
 SET(LIBRARY_OUTPUT_PATH ${CMAKE_BINARY_DIR}/lib)
@@ -171,7 +187,7 @@ if(WIN32)
   unset(CMAKE_INCLUDE_WIN)
 endif()
 
-# library dependency cannot start with a space (CMP0004), so initialize it with something that is never desactivated.
+# library dependency cannot start with a space (CMP0004), so initialize it with something that is never deactivated.
 set(SIMGRID_DEP "-lm") 
 
 ### Determine the assembly flavor that we need today
@@ -189,6 +205,8 @@ IF(CMAKE_SYSTEM_PROCESSOR MATCHES ".86|AMD64|amd64")
   ENDIF()
   if (WIN32)
     message(STATUS "Disable fast raw contexts on Windows.")
+  elseif(CMAKE_SIZEOF_VOID_P EQUAL 4 AND CMAKE_SYSTEM_PROCESSOR STREQUAL "x86_64")
+    message(STATUS "Disable fast raw contexts on x32 ABI.")
   else()
     set(HAVE_RAW_CONTEXTS 1)
   endif()
@@ -205,11 +223,14 @@ include(CheckLibraryExists)
 include(CheckSymbolExists)
 
 set(HAVE_GRAPHVIZ 0)
-include(FindGraphviz)
-
 set(SIMGRID_HAVE_LUA 0)
-if(enable_lua)
-  include(FindLuaSimgrid)
+if(minimal-bindings)
+  message(STATUS "Don't even look for graphviz nor lua, as we build minimal binding libraries.")
+else()
+  include(FindGraphviz)
+  if(enable_lua)
+    include(FindLuaSimgrid)
+  endif()
 endif()
 
 set(SIMGRID_HAVE_NS3 0)
@@ -217,14 +238,19 @@ if(enable_ns3)
   include(FindNS3)
   if (SIMGRID_HAVE_NS3)
     set(SIMGRID_HAVE_NS3 1)
-    foreach(lib core csma point-to-point internet network applications)
+    foreach(lib core csma point-to-point internet network applications wifi)
       set(SIMGRID_DEP "${SIMGRID_DEP} -lns${NS3_VERSION}-${lib}${NS3_SUFFIX}")
     endforeach()
   else()
-    message(FATAL_ERROR "Cannot find NS3. Please install it (apt-get install ns3 libns3-dev) or disable that cmake option")
+    message(FATAL_ERROR "Cannot find ns-3. Please install it (apt-get install ns3 libns3-dev) or disable that cmake option")
   endif()
 endif()
 
+set(SIMGRID_HAVE_MSG 0)
+if(enable_msg)
+  set(SIMGRID_HAVE_MSG 1)
+endif()
+
 if(WIN32)
   set(Boost_USE_STATIC_LIBS 1)
 endif()
@@ -238,57 +264,60 @@ if(enable_smpi_papi)
 endif()
 
 # But we do need the core of Boost
-find_package(Boost 1.48)
-if(Boost_FOUND)
-  include_directories(${Boost_INCLUDE_DIRS})
-else()
-  if(APPLE)
-    message(FATAL_ERROR "Boost libraries not found. Try to install them with 'sudo fink install boost1.53.nopython' (check the exact name with 'fink list boost') or 'sudo brew install boost'")
-  else()
-    message(FATAL_ERROR "Boost libraries not found. Install libboost-dev (>= 1.48.0).")
-  endif()
-endif()
-
 # cmake before 3.13.1 does not know about stacktrace components. Fix it.
 # Usable components: https://www.boost.org/doc/libs/1_65_1/doc/html/stacktrace/configuration_and_build.html
 set(_Boost_STACKTRACE_HEADERS           "boost/stacktrace.hpp")
 set(_Boost_STACKTRACE_BACKTRACE_HEADERS "boost/stacktrace.hpp")
 set(_Boost_STACKTRACE_ADDR2LINE_HEADERS "boost/stacktrace.hpp")
 
-if(minimal_java) # When we want a minimal jarfile, don't even search for boost optional components
-  message(STATUS "Don't even look for boost optional components, as we build a minimal jar file")
-else()
-  find_package(Boost 1.59 COMPONENTS context stacktrace_backtrace stacktrace_addr2line)
-  set(Boost_FOUND 1) # These components are optionals
-  message(STATUS "Mandatory components found. SimGrid is compilable.")
-  message(STATUS "Looking for optional Boost components:")
-
-  if (Boost_STACKTRACE_BACKTRACE_FOUND)
-    message (STATUS "  stacktrace: found the fast 'backtrace' implementation. Activating human-readable stack traces.")
-    set(HAVE_BOOST_STACKTRACE_BACKTRACE 1)
-    set(SIMGRID_DEP "${SIMGRID_DEP} -lboost_stacktrace_backtrace")
+  if(minimal-bindings) # When we want a minimal jarfile, don't even search for boost optional components
+    message(STATUS "Don't even look for boost optional components, as we build minimal binding libraries.")
+    find_package(Boost 1.48)
   else()
-    set(HAVE_BOOST_STACKTRACE_BACKTRACE 0)
-    
-    if (Boost_STACKTRACE_ADDR2LINE_FOUND)
-      message (STATUS "  stacktrace: found the slow 'addr2line' implementation. Activating human-readable stack traces.")
-      set(HAVE_BOOST_STACKTRACE_ADDR2LINE 1)
-      set(SIMGRID_DEP "${SIMGRID_DEP} -lboost_stacktrace_addr2line")
-    else()
-      message (STATUS "  stacktrace: MISSING. Install libboost-stacktrace-dev to display the stacktraces.")
-      set(HAVE_BOOST_STACKTRACE_ADDR2LINE 0)
-    endif()
+    find_package(Boost 1.59 OPTIONAL_COMPONENTS context stacktrace_backtrace stacktrace_addr2line)
   endif()
-
-  if(Boost_CONTEXT_FOUND)
-    message (STATUS "  context: found. Activating Boost contexts.")
-    set(HAVE_BOOST_CONTEXTS 1)
+  if(Boost_FOUND)
+    include_directories(${Boost_INCLUDE_DIRS})
+    message(STATUS "Mandatory components found. SimGrid is compilable.")
+    if (NOT minimal-bindings)
+      message(STATUS "Looking for optional Boost components:")
+      set(Boost_FOUND 1) # These components are optionals
+      CHECK_INCLUDE_FILE("backtrace.h" HAVE_BACKTRACE_H) # check that backtrace is actually possible
+      if (Boost_STACKTRACE_BACKTRACE_FOUND AND HAVE_BACKTRACE_H)
+        message (STATUS "  stacktrace: found the fast 'backtrace' implementation. Activating human-readable stack traces.")
+        set(HAVE_BOOST_STACKTRACE_BACKTRACE 1)
+      else()
+        set(HAVE_BOOST_STACKTRACE_BACKTRACE 0)
+        if (Boost_STACKTRACE_ADDR2LINE_FOUND)
+          message (STATUS "  stacktrace: found the slow 'addr2line' implementation. Activating human-readable stack traces.")
+          set(HAVE_BOOST_STACKTRACE_ADDR2LINE 1)
+        else()
+          message (STATUS "  stacktrace: MISSING. Install libboost-stacktrace-dev to display the stacktraces.")
+          set(HAVE_BOOST_STACKTRACE_ADDR2LINE 0)
+        endif()
+      endif()
+
+      if(Boost_CONTEXT_FOUND)
+        message (STATUS "  context: found. Activating Boost contexts.")
+        set(HAVE_BOOST_CONTEXTS 1)
+      else()
+        message (STATUS "  context: MISSING. Install libboost-context-dev for this optional feature.")
+        set(HAVE_BOOST_CONTEXTS 0)
+      endif()
+    endif()
   else()
-    message (STATUS "  context: MISSING. Install libboost-context-dev for this optional feature.")
-    set(HAVE_BOOST_CONTEXTS 0)
-  endif()
-endif()
-
+    if(APPLE)
+      message(FATAL_ERROR "Boost libraries not found. Try to install them with 'sudo fink install boost1.53.nopython' (check the exact name with 'fink list boost') or 'sudo brew install boost'")
+    else()
+      find_package(Boost 1.48) #try without optional libraries
+      if(NOT Boost_FOUND)
+        message(FATAL_ERROR "Boost libraries not found. Install libboost-dev (>= 1.48.0).")
+      else()
+        include_directories(${Boost_INCLUDE_DIRS})
+        message(STATUS "Mandatory components found. SimGrid is compilable.")
+      endif()
+    endif()
+  endif() 
 
 # Checks for header libraries functions.
 CHECK_LIBRARY_EXISTS(rt      clock_gettime           "" HAVE_POSIX_GETTIME)
@@ -310,7 +339,6 @@ CHECK_INCLUDE_FILE("unistd.h" HAVE_UNISTD_H)
 CHECK_INCLUDE_FILE("signal.h" HAVE_SIGNAL_H)
 CHECK_INCLUDE_FILE("sys/param.h" HAVE_SYS_PARAM_H)
 CHECK_INCLUDE_FILE("sys/sysctl.h" HAVE_SYS_SYSCTL_H)
-CHECK_INCLUDE_FILE("ucontext.h" HAVE_UCONTEXT_H)
 CHECK_INCLUDE_FILE("linux/futex.h" HAVE_FUTEX_H)
 
 CHECK_FUNCTION_EXISTS(dlfunc HAVE_DLFUNC)
@@ -365,10 +393,10 @@ else()
   SET(SIMGRID_HAVE_MALLOCATOR 0)
 endif()
 
-if (minimal_java)
-  message(STATUS "Don't look for libunwind as we build a minimal jar file.")
+if (minimal-bindings)
+  message(STATUS "Don't look for libunwind as we build minimal binding libraries.")
   if(enable_model-checking)
-    message(FATAL_ERROR "You cannot enable model-checking and minimal_java at the same time.")
+    message(FATAL_ERROR "You cannot enable model-checking and minimal-bindings at the same time.")
   endif()
 else()
   include(FindLibunwind)
@@ -389,7 +417,7 @@ if(enable_model-checking)
   set(SIMGRID_DEP "${SIMGRID_DEP} ${LIBEVENT_LIBRARIES} ${LIBELF_LIBRARIES} ${LIBDW_LIBRARIES}")
   set(SIMGRID_HAVE_MC 1)
   if("${CMAKE_SYSTEM}" MATCHES "FreeBSD" AND enable_java)
-    message(WARNING "FreeBSD + Model-Checking + Java = too much for now. Disabling java")
+    message(WARNING "FreeBSD + Model-Checking + Java = too much for now. Disabling the Java bindings.")
     set(enable_java FALSE)
   endif()
 else()
@@ -399,17 +427,21 @@ endif()
 mark_as_advanced(PATH_LIBDW_H)
 mark_as_advanced(PATH_LIBDW_LIB)
 
+if(enable_java AND NOT enable_msg)
+  message(FATAL_ERROR "Cannot activate the Java bindings without the MSG module. Either add -Denable_msg=ON or -Denable_java=OFF")
+endif()
+
 if (enable_model-checking AND enable_ns3)
-  message(FATAL_ERROR "Cannot activate both model-checking and NS3 bindings: NS3 pull too much dependencies for the MC to work")
+  message(FATAL_ERROR "Cannot activate both model-checking and ns-3 bindings: ns-3 pulls too much dependencies for the MC to work")
 endif()
 
 if(enable_smpi)
   SET(HAVE_SMPI 1)
-  if("${CMAKE_SYSTEM}" MATCHES "Darwin|FreeBSD|Linux|SunOS")
-    SET(HAVE_PRIVATIZATION 1)
-  else()
-    message (STATUS "Warning:  no support for SMPI automatic privatization on this platform")
+  if(WIN32)
+    message (STATUS "Warning: no support for SMPI automatic privatization on Windows.")
     SET(HAVE_PRIVATIZATION 0)
+  else()
+    SET(HAVE_PRIVATIZATION 1)
   endif()
 else()
   SET(HAVE_SMPI 0)
@@ -419,6 +451,7 @@ endif()
 ### Check what context backends are available
 
 set(HAVE_UCONTEXT_CONTEXTS 0)
+CHECK_INCLUDE_FILE("ucontext.h" HAVE_UCONTEXT_H)
 if(NOT HAVE_UCONTEXT_H)
   message(STATUS "No ucontext factory: <ucontext.h> not found.")
 elseif(APPLE)
@@ -512,14 +545,14 @@ endif()
 
 # Avoid triggering a (full) rebuild by touching the files if they did not really change
 configure_file("${CMAKE_HOME_DIRECTORY}/src/internal_config.h.in"    "${CMAKE_BINARY_DIR}/src/internal_config.h.generated"    @ONLY IMMEDIATE)
-configure_file("${CMAKE_HOME_DIRECTORY}/src/simgrid/version.h.in"    "${CMAKE_BINARY_DIR}/src/simgrid/version.h.generated" @ONLY IMMEDIATE)
+configure_file("${CMAKE_HOME_DIRECTORY}/include/simgrid/version.h.in" "${CMAKE_BINARY_DIR}/include/simgrid/version.h.generated" @ONLY IMMEDIATE)
 configure_file("${CMAKE_HOME_DIRECTORY}/include/simgrid/config.h.in" "${CMAKE_BINARY_DIR}/include/simgrid/config.h.generated" @ONLY IMMEDIATE)
 execute_process(COMMAND ${CMAKE_COMMAND} -E copy_if_different ${CMAKE_BINARY_DIR}/src/internal_config.h.generated ${CMAKE_BINARY_DIR}/src/internal_config.h)
-execute_process(COMMAND ${CMAKE_COMMAND} -E copy_if_different ${CMAKE_BINARY_DIR}/src/simgrid/version.h.generated ${CMAKE_BINARY_DIR}/src/simgrid/version.h)
+execute_process(COMMAND ${CMAKE_COMMAND} -E copy_if_different ${CMAKE_BINARY_DIR}/include/simgrid/version.h.generated ${CMAKE_BINARY_DIR}/include/simgrid/version.h)
 execute_process(COMMAND ${CMAKE_COMMAND} -E copy_if_different ${CMAKE_BINARY_DIR}/include/simgrid/config.h.generated ${CMAKE_BINARY_DIR}/include/simgrid/config.h)
 file(REMOVE ${CMAKE_BINARY_DIR}/src/internal_config.h.generated)
 file(REMOVE ${CMAKE_BINARY_DIR}/include/simgrid/config.h.generated)
-file(REMOVE ${CMAKE_BINARY_DIR}/src/simgrid/version.h.generated)
+file(REMOVE ${CMAKE_BINARY_DIR}/include/simgrid/version.h.generated)
 
 # We need two versions of the SMPI scripts because they contain the path to the library
 # so, it depends of whether SimGrid is installed, or run from the sources (during the build)
@@ -528,14 +561,14 @@ file(READ ${CMAKE_HOME_DIRECTORY}/src/smpi/smpitools.sh SMPITOOLS_SH) # Definiti
 
 ### SMPI script used when simgrid is installed
 set(exec_prefix ${CMAKE_INSTALL_PREFIX})
-set(includeflag "-I${CMAKE_INSTALL_PREFIX}/include -I${CMAKE_INSTALL_PREFIX}/include/smpi")
-set(includedir "${CMAKE_INSTALL_PREFIX}/include")
-set(libdir ${exec_prefix}/lib)
-set(CMAKE_SMPI_COMMAND "export LD_LIBRARY_PATH=\"${CMAKE_INSTALL_PREFIX}/lib")
+set(includedir "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_INCLUDEDIR}")
+set(libdir "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}")
+set(includeflag "-I${includedir} -I${includedir}/smpi")
+set(CMAKE_SMPI_COMMAND "export LD_LIBRARY_PATH=\"${libdir}")
 if(NS3_LIBRARY_PATH)
   set(CMAKE_SMPI_COMMAND "${CMAKE_SMPI_COMMAND}:${NS3_LIBRARY_PATH}")
 endif()
-set(CMAKE_SMPI_COMMAND "${CMAKE_SMPI_COMMAND}:\${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}\"")
+set(CMAKE_SMPI_COMMAND "${CMAKE_SMPI_COMMAND}\${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}\"")
 set(SMPIMAIN ${libdir}/simgrid/smpimain)
 set(SMPIREPLAYMAIN ${libdir}/simgrid/smpireplaymain)
 
@@ -556,17 +589,17 @@ endforeach()
 
 ### SMPI scripts used when compiling simgrid 
 set(exec_prefix "${CMAKE_BINARY_DIR}/smpi_script/")
-set(includeflag "-I${CMAKE_HOME_DIRECTORY}/include -I${CMAKE_HOME_DIRECTORY}/include/smpi")
-set(includeflag "${includeflag} -I${CMAKE_BINARY_DIR}/include -I${CMAKE_BINARY_DIR}/include/smpi")
 set(includedir "${CMAKE_HOME_DIRECTORY}/include")
 set(libdir "${CMAKE_BINARY_DIR}/lib")
-set(CMAKE_SMPI_COMMAND "export LD_LIBRARY_PATH=\"${CMAKE_BINARY_DIR}/lib")
+set(includeflag "-I${includedir} -I${includedir}/smpi")
+set(includeflag "${includeflag} -I${CMAKE_BINARY_DIR}/include -I${CMAKE_BINARY_DIR}/include/smpi")
+set(CMAKE_SMPI_COMMAND "export LD_LIBRARY_PATH=\"${libdir}")
 if(NS3_LIBRARY_PATH)
   set(CMAKE_SMPI_COMMAND "${CMAKE_SMPI_COMMAND}:${NS3_LIBRARY_PATH}")
 endif()
-set(CMAKE_SMPI_COMMAND "${CMAKE_SMPI_COMMAND}:\${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}\"")
-set(SMPIMAIN ${CMAKE_BINARY_DIR}/lib/simgrid/smpimain)
-set(SMPIREPLAYMAIN ${CMAKE_BINARY_DIR}/lib/simgrid/smpireplaymain)
+set(CMAKE_SMPI_COMMAND "${CMAKE_SMPI_COMMAND}\${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}\"")
+set(SMPIMAIN ${libdir}/simgrid/smpimain)
+set(SMPIREPLAYMAIN ${libdir}/simgrid/smpireplaymain)
 
 foreach(script cc cxx ff f90 run)
   configure_file(${CMAKE_HOME_DIRECTORY}/src/smpi/smpi${script}.in ${CMAKE_BINARY_DIR}/smpi_script/bin/smpi${script} @ONLY)
@@ -582,6 +615,7 @@ endif()
 set(generated_headers_to_install
   ${CMAKE_CURRENT_BINARY_DIR}/include/smpi/mpif.h
   ${CMAKE_CURRENT_BINARY_DIR}/include/simgrid/config.h
+  ${CMAKE_CURRENT_BINARY_DIR}/include/simgrid/version.h
   )
 
 set(generated_headers  ${CMAKE_CURRENT_BINARY_DIR}/src/internal_config.h )
@@ -767,48 +801,42 @@ endif()
 
 # Python binding (with pybind11)
 ################
-# Our usage of pybind11::overload_cast mandates C++14
 if((NOT DEFINED enable_python) OR enable_python)
-  get_property(known_features GLOBAL PROPERTY CMAKE_CXX_KNOWN_FEATURES)
-
-  if("cxx_std_14" IN_LIST known_features)
-
-    if(EXISTS ${CMAKE_HOME_DIRECTORY}/pybind11) # Try to use a local copy of pybind11, if any
-      message(STATUS "Use the internal copy of pybind11 (using C++14).")
-      add_subdirectory(${CMAKE_HOME_DIRECTORY}/pybind11)
-      set(pybind11_FOUND ON)
-
-      set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_HOME_DIRECTORY}/pybind11/tools/)
-      set(Python_ADDITIONAL_VERSIONS 3.7 3.6 3.5 3.4)
-      find_package(PythonLibsNew ${PYBIND11_PYTHON_VERSION} REQUIRED)
-
-    else()
-      find_package(pybind11 2.2.0)
-    endif()
+  if(EXISTS ${CMAKE_HOME_DIRECTORY}/pybind11) # Try to use a local copy of pybind11, if any
+    message(STATUS "Use the internal copy of pybind11.")
+    add_subdirectory(${CMAKE_HOME_DIRECTORY}/pybind11)
+    set(pybind11_FOUND ON)
 
-    if(NOT PYTHONLIBS_FOUND)
-      message(STATUS "Python libs not found. Turn pybind11 off.")
+    set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_HOME_DIRECTORY}/pybind11/tools/)
+    set(Python_ADDITIONAL_VERSIONS 3.9 3.8 3.7 3.6 3.5 3.4)
+    find_package(PythonLibsNew ${PYBIND11_PYTHON_VERSION} REQUIRED)
 
+  else()
+    find_package(pybind11 CONFIG)
+    message(STATUS "Pybind11 version: ${pybind11_VERSION}")
+    if (pybind11_VERSION VERSION_LESS 2.4)
+      message(STATUS "SimGrid needs at least v2.4 of pybind11. Disabling the Python bindings.")
       set(pybind11_FOUND OFF)
     endif()
+  endif()
+
+  if(NOT PYTHONLIBS_FOUND AND NOT Python3_Development_FOUND)
+    message(STATUS "Python libs not found. Turn pybind11 off.")
 
-  else()
-    message(STATUS "No support for C++14 detected, don't even search for pybind11.")
     set(pybind11_FOUND OFF)
   endif()
-  unset(known_features)
 endif()
 
 option(enable_python "Whether the Python bindings are activated." ${pybind11_FOUND}) # ON by default if dependencies are met
 
 if("${CMAKE_SYSTEM}" MATCHES "FreeBSD" AND enable_model-checking AND enable_python)
-  message(WARNING "FreeBSD + Model-Checking + Python = too much for now. Disabling python.")
+  message(WARNING "FreeBSD + Model-Checking + Python = too much for now. Disabling the Python bindings.")
   set(enable_python FALSE)
 endif()
 
 if(enable_python)
   if(pybind11_FOUND)
-    message(STATUS "Found pybind11, with C++14.")
+    message(STATUS "Found pybind11.")
     if(NOT enable_lto)
       set(pybind11_options NO_EXTRAS)
     endif()
@@ -817,7 +845,15 @@ if(enable_python)
     target_link_libraries(python-bindings PUBLIC simgrid)
     set_target_properties(python-bindings PROPERTIES
                           LIBRARY_OUTPUT_NAME simgrid
-                          CXX_VISIBILITY_PRESET "default")
+                          CXX_VISIBILITY_PRESET "default"
+                          INTERPROCEDURAL_OPTIMIZATION FALSE)
+    # LTO is disabled here from the python bindings because this makes a
+    # cmake warning about CMP0069 even when this policy is set. This
+    # problem may be in cmake, in pybind11 or even in our code, not sure.
+    # It may get eventually solved in cmake or pybind11. Or not.
+    # The sure thing is that our python bindings are in one file only,
+    # so there is no need for LTO here. Problem solved :)
+
     add_dependencies(tests python-bindings)
     set_property(TARGET python-bindings
                  APPEND PROPERTY INCLUDE_DIRECTORIES "${INTERNAL_INCLUDES}")
@@ -878,11 +914,7 @@ message("        Build Name ..................: ${BUILDNAME}")
 message("        Cmake Generator .............: ${CMAKE_GENERATOR}")
 message("        Site ........................: ${SITE}")
 message("        Install prefix ..............: ${CMAKE_INSTALL_PREFIX}")
-if(release)
-  message("        Release .....................: simgrid-${release_version}${SIMGRID_VERSION_EXTRA} (release build)")
-else()
-  message("        Release .....................: simgrid-${release_version}${SIMGRID_VERSION_EXTRA} (development build)")
-endif()
+message("        Release .....................: simgrid-${release_version}")
 message("")
 message("        Compiler: C .................: ${CMAKE_C_COMPILER} (id: ${CMAKE_C_COMPILER_ID})")
 message("                version .............: ${CMAKE_C_COMPILER_VERSION}")
@@ -908,23 +940,29 @@ message("        LDFlags .....................: ${CMAKE_C_LINK_FLAGS}")
 message("        with LTO ....................: ${enable_lto}")
 message("")
 
+if (SIMGRID_HAVE_MSG)
+  message("        Compile MSG .................: ON")
+else()
+  message("        Compile MSG .................: OFF")
+endif()
+
 if (SIMGRID_HAVE_NS3)
-  message("        Compile NS-3 ................: yes (path: ${NS3_PATH})")
+  message("        Compile ns-3 ................: ON (path: ${NS3_PATH})")
 else()
-  message("        Compile NS-3 ................: NO  (hint: ${NS3_HINT})")
+  message("        Compile ns-3 ................: OFF  (hint: ${NS3_HINT})")
 endif()
 
 if (${Java_FOUND})
-  message("        Compile Java ................: yes")
+  message("        Compile Java ................: ON")
   message("          Native lib in jar .........: ${enable_lib_in_jar}")
 else()
-  message("        Compile Java ................: NO")
+  message("        Compile Java ................: OFF")
 endif()
 if(pybind11_FOUND)
   message("        Compile Python bindings .....: ${enable_python}")
   message("          module ....................: ${PYTHON_MODULE_PREFIX}simgrid${PYTHON_MODULE_EXTENSION}")
 else()
-  message("        Compile Python bindings .....: NO (disabled, or pybind11 not found)")
+  message("        Compile Python bindings .....: OFF (disabled, or pybind11 not found)")
 endif()
 message("        Compile Lua .................: ${SIMGRID_HAVE_LUA}")
 message("        Compile Smpi ................: ${HAVE_SMPI}")