X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/3e9453209f1da7deb92fe629428e49f3528217bd..b7f1c354386134784f90d96dab71b2b5a3f45c23:/CMakeLists.txt

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 96b38db6c2..f702831160 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -21,12 +21,8 @@ set(SIMGRID_VERSION_STRING "SimGrid version ${release_version}")
 set(libsimgrid_version "${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()
-# once we move >= 3.13, we should use target_link_option in examples/sthread
+cmake_minimum_required(VERSION 3.12)
+# once we move CMake to >= 3.13, we should use target_link_option in examples/sthread
 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)
 
@@ -132,21 +128,11 @@ if(NOT PERL_FOUND)
 endif()
 
 # tesh.py needs python 3 (or the module python-subprocess32 on python2.8+)
-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})
+find_package(Python3 COMPONENTS Interpreter)
+if(NOT Python3_Interpreter_FOUND)
+  message(FATAL_ERROR "Please install Python (version 3 or higher) to compile SimGrid.")
 endif()
+set(PYTHON_EXECUTABLE ${Python3_EXECUTABLE})
 
 SET(LIBRARY_OUTPUT_PATH ${CMAKE_BINARY_DIR}/lib)
 
@@ -769,15 +755,17 @@ if((NOT DEFINED enable_python) OR enable_python)
       set(pybind11_FOUND OFF)
     endif()
   endif()
+endif()
 
-  if(NOT PYTHONLIBS_FOUND AND NOT Python3_Development_FOUND)
-    message(STATUS "Python libs not found. Turn pybind11 off.")
-
-    set(pybind11_FOUND OFF)
-  endif()
+find_package(Python3 COMPONENTS Development)
+if(NOT Python3_Development_FOUND OR NOT pybind11_FOUND)
+  message(STATUS "SimGrid Python bindings cannot be built on this system.")
+  set(default_enable_python OFF)
+else()
+  set(default_enable_python ON)
 endif()
 
-option(enable_python "Whether the Python bindings are activated." ${pybind11_FOUND}) # ON by default if dependencies are met
+option(enable_python "Whether the Python bindings are activated." ${default_enable_python}) # ON by default if dependencies are met
 
 if("${CMAKE_SYSTEM}" MATCHES "FreeBSD" AND enable_model-checking AND enable_python)
   message(WARNING "FreeBSD + Model-Checking + Python = too much for now. Disabling the Python bindings.")
@@ -785,6 +773,9 @@ if("${CMAKE_SYSTEM}" MATCHES "FreeBSD" AND enable_model-checking AND enable_pyth
 endif()
 
 if(enable_python)
+  if(NOT Python3_Development_FOUND)
+    message(FATAL_ERROR "Please install the development components of Python (python3-dev on Debian) to build the Python bindings (or disable that option).")
+  endif()
   if(pybind11_FOUND)
     message(STATUS "Found pybind11.")
     if(NOT enable_lto)