X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/bef9e56fd601b15454f003bb8d0b66db491ddf9f..refs/heads/private:/FindSimGrid.cmake

diff --git a/FindSimGrid.cmake b/FindSimGrid.cmake
index 9d0f30be82..eec2f92ed5 100644
--- a/FindSimGrid.cmake
+++ b/FindSimGrid.cmake
@@ -1,48 +1,98 @@
-# 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) 2016-2023. 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.
 
-# Once done, the following will be defined:
 #
-#  CMake >= 2.8.12:
-#    Target SimGrid::Simgrid
+# USERS OF PROGRAMS USING SIMGRID
+# -------------------------------
 #
-#    Use as:
-#      target_link_libraries(your-simulator SimGrid::SimGrid)
+# If cmake does not find this file, add its path to CMAKE_PREFIX_PATH:
+#    CMAKE_PREFIX_PATH="/path/to/FindSimGrid.cmake:$CMAKE_PREFIX_PATH"  cmake .
 #
-#  Older CMake (< 2.8.12)
-#    SimGrid_INCLUDE_DIR - the SimGrid include directories
-#    SimGrid_LIBRARY - link your simulator against it to use SimGrid
+# If this file does not find SimGrid, define SimGrid_PATH:
+#    cmake -DSimGrid_PATH=/path/to/simgrid .
+
+#
+# DEVELOPERS OF PROGRAMS USING SIMGRID
+# ------------------------------------
+#
+#  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. This will define a target called 'SimGrid::Simgrid'. Use it as:
+#       target_link_libraries(your-simulator SimGrid::SimGrid)
+#
+#  It also defines a SimGrid_VERSION macro, that you can use to deal with API
+#    evolutions as follows:
+#
+#    #if SimGrid_VERSION < 31800
+#      (code to use if the installed version is lower than v3.18)
+#    #elif SimGrid_VERSION < 31900
+#      (code to use if we are using SimGrid v3.18.x)
+#    #else
+#      (code to use with SimGrid v3.19+)
+#    #endif
+#
+#  Since SimGrid header files require C++17, so we set CMAKE_CXX_STANDARD to 17.
+#    Change this variable in your own file if you need a later standard.
+
+# DEVELOPPERS OF MPI PROGRAMS USING SIMGRID
+#   You should use smpi_c_target() on the targets that are intended to run in SMPI.
+#   ${SMPIRUN} is correctly set if it's installed.
 #
-#    Use as:
-#      include_directories("${SimGrid_INCLUDE_DIR}" SYSTEM)
-#      target_link_libraries(your-simulator ${SimGrid_LIBRARY})
+#   Example:
+#     add_executable(roundtrip roundtrip.c)
+#     smpi_c_target(roundtrip)
 #
-# This could be improved:
+#     enable_testing()
+#     add_test(NAME Roundtrip
+#              COMMAND ${SMPIRUN} -platform ${CMAKE_SOURCE_DIR}/../cluster_backbone.xml -np 2 ./roundtrip)
+
+#
+# IMPROVING THIS FILE
+# -------------------
 #  - Use automatic SimGridConfig.cmake creation via export/install(EXPORT in main CMakeLists.txt:
 #    https://cliutils.gitlab.io/modern-cmake/chapters/exporting.html
 #    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 3.5)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 find_path(SimGrid_INCLUDE_DIR
-  NAMES simgrid_config.h
-  PATHS /opt/simgrid/include
+  NAMES simgrid/config.h
+  NAMES simgrid/version.h
+  PATHS ${SimGrid_PATH}/include /opt/simgrid/include
 )
+if (NOT SimGrid_INCLUDE_DIR)
+  # search under the old name
+  find_path(SimGrid_INCLUDE_DIR
+    NAMES simgrid_config.h
+    PATHS ${SimGrid_PATH}/include /opt/simgrid/include
+  )
+endif()
 find_library(SimGrid_LIBRARY
   NAMES simgrid
-  PATHS /opt/simgrid/lib
+  PATHS ${SimGrid_PATH}/lib /opt/simgrid/lib
 )
 mark_as_advanced(SimGrid_INCLUDE_DIR)
 mark_as_advanced(SimGrid_LIBRARY)
 
 if (SimGrid_INCLUDE_DIR)
   set(SimGrid_VERSION_REGEX "^#define SIMGRID_VERSION_(MAJOR|MINOR|PATCH) ([0-9]+)$")
-  file(STRINGS "${SimGrid_INCLUDE_DIR}/simgrid_config.h" SimGrid_VERSION_STRING REGEX ${SimGrid_VERSION_REGEX})
+  if (EXISTS "${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})
+  endif()
   set(SimGrid_VERSION "")
 
   # Concat the matches to MAJOR.MINOR.PATCH assuming they appear in this order
@@ -54,7 +104,7 @@ 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)
@@ -64,29 +114,43 @@ find_package_handle_standard_args(SimGrid
   VERSION_VAR SimGrid_VERSION
 )
 
-if (SimGrid_FOUND AND NOT CMAKE_VERSION VERSION_LESS 2.8.12)
+if (SimGrid_FOUND)
+
+  find_program(SMPIRUN smpirun
+               HINTS ${SimGrid_PATH}/bin /opt/simgrid/bin)
+
+  MACRO(smpi_c_target NAME)
+    target_compile_options(${NAME} PUBLIC "-include;smpi/smpi_helpers.h;-fPIC;-shared;-Wl,-z,defs")
+    target_link_options(${NAME} PUBLIC "-fPIC;-shared;-Wl,-z,defs;-lm")
+    target_link_libraries(${NAME} PUBLIC ${SimGrid_LIBRARY})
+    target_include_directories(${NAME} PUBLIC "${SimGrid_INCLUDE_DIR};${SimGrid_INCLUDE_DIR}/smpi")
+  ENDMACRO()
+
   add_library(SimGrid::SimGrid SHARED IMPORTED)
   set_target_properties(SimGrid::SimGrid PROPERTIES
     INTERFACE_SYSTEM_INCLUDE_DIRECTORIES ${SimGrid_INCLUDE_DIR}
     INTERFACE_COMPILE_FEATURES cxx_alias_templates
     IMPORTED_LOCATION ${SimGrid_LIBRARY}
   )
-  # We need C++11, so check for it
+  # We need C++17, so check for it just in case the user removed it since compiling SimGrid
   if (NOT CMAKE_VERSION VERSION_LESS 3.8)
-    # 3.8+ allows us to simply require C++11 (or higher)
-    set_property(TARGET SimGrid::SimGrid PROPERTY INTERFACE_COMPILE_FEATURES cxx_std_11)
-  elseif (NOT CMAKE_VERSION VERSION_LESS 3.1)
-    # 3.1+ is similar but for certain features. We pick just one
-    set_property(TARGET SimGrid::SimGrid PROPERTY INTERFACE_COMPILE_FEATURES cxx_alias_templates)
+    # 3.8+ allows us to simply require C++17 (or higher)
+    set_property(TARGET SimGrid::SimGrid PROPERTY INTERFACE_COMPILE_FEATURES cxx_std_17)
   else ()
-    # Old CMake can't do much. Just check the CXX_FLAGS and inform the user when a C++11 feature does not work
+    # Old CMake can't do much. Just check the CXX_FLAGS and inform the user when a C++17 feature does not work
     include(CheckCXXSourceCompiles)
     set(CMAKE_REQUIRED_FLAGS "${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 this library. Enable it with e.g. -std=c++11")
+    check_cxx_source_compiles("
+#if __cplusplus < 201703L
+#error
+#else
+int main(){}
+#endif
+" _SIMGRID_CXX17_ENABLED)
+    if (NOT _SIMGRID_CXX17_ENABLED)
+        message(WARNING "C++17 is required to use SimGrid. Enable it with e.g. -std=c++17")
     endif ()
-    unset(_SIMGRID_CXX11_ENABLED CACHE)
+    unset(_SIMGRID_CXX14_ENABLED CACHE)
   endif ()
 endif ()