X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/f23b0fb864cb60978c1fcfd48d50f62dd054fe31..2a999ac2440bf73a4b7882a728e01d3485e0982a:/FindSimGrid.cmake

diff --git a/FindSimGrid.cmake b/FindSimGrid.cmake
index ad4792e827..cdb6a6b520 100644
--- a/FindSimGrid.cmake
+++ b/FindSimGrid.cmake
@@ -1,6 +1,6 @@
-# CMake find module to search for the SimGrid library. 
+# CMake find module to search for the SimGrid library.
 
-# Copyright (c) 2016-2018. The SimGrid Team.
+# Copyright (c) 2016-2022. The SimGrid Team.
 #
 # This file is free software; you can redistribute it and/or modify it
 # under the terms of the license (GNU LGPL) which comes with this package.
@@ -19,10 +19,10 @@
 # DEVELOPERS OF PROGRAMS USING SIMGRID
 # ------------------------------------
 #
-#  1. Include this file in your own CMakeLists.txt
+#  1. Include this file in your own CMakeLists.txt (before defining any target)
 #     Either by copying it in your tree, or (recommended) by using the
 #     version automatically installed by SimGrid.
-#    
+#
 #  2. Afterward, if you have CMake >= 2.8.12, this will define a
 #     target called 'SimGrid::Simgrid'. Use it as:
 #       target_link_libraries(your-simulator SimGrid::SimGrid)
@@ -44,8 +44,11 @@
 #    #else
 #      (code to use with SimGrid v3.19+)
 #    #endif
+#
+#  Since SimGrid header files require C++14, so we set CMAKE_CXX_STANDARD to 14.
+#    Change this variable in your own file if you need a later standard.
 
-# 
+#
 # IMPROVING THIS FILE
 # -------------------
 #  - Use automatic SimGridConfig.cmake creation via export/install(EXPORT in main CMakeLists.txt:
@@ -53,10 +56,14 @@
 #    https://cmake.org/Wiki/CMake/Tutorials/How_to_create_a_ProjectConfig.cmake_file
 #    https://github.com/boostcon/cppnow_presentations_2017/blob/master/05-19-2017_friday/effective_cmake__daniel_pfeifer__cppnow_05-19-2017.pdf
 
-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 2.8.12)
+
+set(CMAKE_CXX_STANDARD 14)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 find_path(SimGrid_INCLUDE_DIR
   NAMES simgrid/config.h
+  NAMES simgrid/version.h
   PATHS ${SimGrid_PATH}/include /opt/simgrid/include
 )
 if (NOT SimGrid_INCLUDE_DIR)
@@ -65,7 +72,7 @@ if (NOT SimGrid_INCLUDE_DIR)
     NAMES simgrid_config.h
     PATHS ${SimGrid_PATH}/include /opt/simgrid/include
   )
-endif()    
+endif()
 find_library(SimGrid_LIBRARY
   NAMES simgrid
   PATHS ${SimGrid_PATH}/lib /opt/simgrid/lib
@@ -75,7 +82,9 @@ mark_as_advanced(SimGrid_LIBRARY)
 
 if (SimGrid_INCLUDE_DIR)
   set(SimGrid_VERSION_REGEX "^#define SIMGRID_VERSION_(MAJOR|MINOR|PATCH) ([0-9]+)$")
-  if (EXISTS "${SimGrid_INCLUDE_DIR}/simgrid/config.h")
+  if (EXISTS "${SimGrid_INCLUDE_DIR}/simgrid/version.h")
+    file(STRINGS "${SimGrid_INCLUDE_DIR}/simgrid/version.h" SimGrid_VERSION_STRING REGEX ${SimGrid_VERSION_REGEX})
+  elseif (EXISTS "${SimGrid_INCLUDE_DIR}/simgrid/config.h")
     file(STRINGS "${SimGrid_INCLUDE_DIR}/simgrid/config.h" SimGrid_VERSION_STRING REGEX ${SimGrid_VERSION_REGEX})
   else()
     file(STRINGS "${SimGrid_INCLUDE_DIR}/simgrid_config.h" SimGrid_VERSION_STRING REGEX ${SimGrid_VERSION_REGEX})
@@ -91,7 +100,7 @@ if (SimGrid_INCLUDE_DIR)
     set(SimGrid_VERSION_${CMAKE_MATCH_1} ${CMAKE_MATCH_2})
   endforeach()
   unset(SimGrid_VERSION_STRING)
-  unset(SimGrid_VERSION_REGEX)  
+  unset(SimGrid_VERSION_REGEX)
 endif ()
 
 include(FindPackageHandleStandardArgs)
@@ -108,22 +117,28 @@ if (SimGrid_FOUND AND NOT CMAKE_VERSION VERSION_LESS 2.8.12)
     INTERFACE_COMPILE_FEATURES cxx_alias_templates
     IMPORTED_LOCATION ${SimGrid_LIBRARY}
   )
-  # We need C++11, so check for it just in case the user removed it since compiling SimGrid
+  # We need C++14, so check for it just in case the user removed it since compiling SimGrid
   if (NOT CMAKE_VERSION VERSION_LESS 3.8)
-    # 3.8+ allows us to simply require C++11 (or higher)
-    set_property(TARGET SimGrid::SimGrid PROPERTY INTERFACE_COMPILE_FEATURES cxx_std_11)
+    # 3.8+ allows us to simply require C++14 (or higher)
+    set_property(TARGET SimGrid::SimGrid PROPERTY INTERFACE_COMPILE_FEATURES cxx_std_14)
   elseif (NOT CMAKE_VERSION VERSION_LESS 3.1)
     # 3.1+ is similar but for certain features. We pick just one
-    set_property(TARGET SimGrid::SimGrid PROPERTY INTERFACE_COMPILE_FEATURES cxx_alias_templates)
+    set_property(TARGET SimGrid::SimGrid PROPERTY INTERFACE_COMPILE_FEATURES cxx_attribute_deprecated)
   else ()
-    # Old CMake can't do much. Just check the CXX_FLAGS and inform the user when a C++11 feature does not work
+    # Old CMake can't do much. Just check the CXX_FLAGS and inform the user when a C++14 feature does not work
     include(CheckCXXSourceCompiles)
     set(CMAKE_REQUIRED_FLAGS "${CMAKE_CXX_FLAGS}")
-    check_cxx_source_compiles("using Foo = int; int main(){}" _SIMGRID_CXX11_ENABLED)
-    if (NOT _SIMGRID_CXX11_ENABLED)
-        message(WARNING "C++11 is required to use SimGrid. Enable it with e.g. -std=c++11")
+    check_cxx_source_compiles("
+#if __cplusplus < 201402L
+#error
+#else
+int main(){}
+#endif
+" _SIMGRID_CXX14_ENABLED)
+    if (NOT _SIMGRID_CXX14_ENABLED)
+        message(WARNING "C++14 is required to use SimGrid. Enable it with e.g. -std=c++14")
     endif ()
-    unset(_SIMGRID_CXX11_ENABLED CACHE)
+    unset(_SIMGRID_CXX14_ENABLED CACHE)
   endif ()
 endif ()