-# Cmake macro to search for the SimGrid library.
+# CMake find module to search for the SimGrid library.
-# Copyright (c) 2016. The SimGrid Team (version 20161210).
+# Copyright (c) 2016-2018. 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.
-# The user can hint a path using the SimGrid_PATH option.
#
-# Once done, the following will be defined:
-#
-# SimGrid_INCLUDE_DIR - the SimGrid include directories
-# SimGrid_LIBRARY - link your simulator against it to use SimGrid
+# USERS OF PROGRAMS USING SIMGRID
+# -------------------------------
#
-# Afterward, you should probably do the following:
+# If cmake does not find this file, add its path to CMAKE_PREFIX_PATH:
+# CMAKE_PREFIX_PATH="/path/to/FindSimGrid.cmake:$CMAKE_PREFIX_PATH" cmake .
#
-# include_directories("${SimGrid_INCLUDE_DIR}" SYSTEM)
-# target_link_libraries(your-simulator ${SimGrid_LIBRARY})
+# If this file does not find SimGrid, define SimGrid_PATH:
+# SimGrid_PATH=/path/to/simgrid cmake .
+
+#
+# DEVELOPERS OF PROGRAMS USING SIMGRID
+# ------------------------------------
+#
+# 1. Include this file in your own CMakeLists.txt
+# Either by copying it in your tree, or (recommended) by using the
+# version automatically installed by SimGrid.
+#
+# 2. Afterward, if you have CMake >= 2.8.12, this will define a
+# target called 'SimGrid::Simgrid'. Use it as:
+# target_link_libraries(your-simulator SimGrid::SimGrid)
+#
+# With older CMake (< 2.8.12), it simply defines several variables:
+# SimGrid_INCLUDE_DIR - the SimGrid include directories
+# SimGrid_LIBRARY - link your simulator against it to use SimGrid
+# Use as:
+# include_directories("${SimGrid_INCLUDE_DIR}" SYSTEM)
+# target_link_libraries(your-simulator ${SimGrid_LIBRARY})
#
-# This could be improved in many ways (patches welcome):
-# - Not finding SimGrid is fatal. But who would want to
-# overcome such a desperate situation anyway? ;)
-# - No way to specify a minimal version
-# - No proper find_package() integration
+# In both cases, it also define 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
+
+#
+# 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)
-set(SimGrid_PATH ${SimGrid_PATH} CACHE PATH "Path to SimGrid library and include")
find_path(SimGrid_INCLUDE_DIR
- NAMES simgrid_config.h
- HINTS ${SimGrid_PATH}/include /usr/include /usr/local/include /opt/simgrid/include
+ NAMES simgrid/config.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
- HINTS ${SimGrid_PATH}/lib /usr/lib /usr/local/lib /opt/simgrid/lib
+ PATHS ${SimGrid_PATH}/lib /opt/simgrid/lib
)
mark_as_advanced(SimGrid_INCLUDE_DIR)
mark_as_advanced(SimGrid_LIBRARY)
-if (NOT EXISTS "${SimGrid_INCLUDE_DIR}")
- message(FATAL_ERROR "Unable to find SimGrid header file. Please point the SimGrid_PATH variable to the installation directory.")
-endif ()
-if (NOT EXISTS "${SimGrid_LIBRARY}")
- message(FATAL_ERROR "Unable to find SimGrid library. Please point the SimGrid_PATH variable to the installation directory.")
-endif ()
-
-# Extract the actual path
-if (NOT "$SimGrid_INCLUDE_DIR" STREQUAL "${SimGrid_PATH}/include")
- string(REGEX REPLACE "(.*)/include" "\\1" SimGrid_PATH "${SimGrid_INCLUDE_DIR}")
-endif()
+if (SimGrid_INCLUDE_DIR)
+ set(SimGrid_VERSION_REGEX "^#define SIMGRID_VERSION_(MAJOR|MINOR|PATCH) ([0-9]+)$")
+ if (EXISTS "${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 ${SimGrid_VERSION_REGEX})
+ endif()
+ set(SimGrid_VERSION "")
-# Extract the actual version number
-file(READ "${SimGrid_INCLUDE_DIR}/simgrid_config.h" _SimGrid_CONFIG_H_CONTENTS)
-set(_SimGrid_VERSION_REGEX ".*#define SIMGRID_VERSION_STRING \"SimGrid version ([^\"]*)\".*")
-if ("${_SimGrid_CONFIG_H_CONTENTS}" MATCHES "${_SimGrid_VERSION_REGEX}")
- string(REGEX REPLACE "${_SimGrid_VERSION_REGEX}" "\\1" SimGrid_VERSION "${_SimGrid_CONFIG_H_CONTENTS}")
-endif ("${_SimGrid_CONFIG_H_CONTENTS}" MATCHES "${_SimGrid_VERSION_REGEX}")
-
+ # Concat the matches to MAJOR.MINOR.PATCH assuming they appear in this order
+ foreach(match ${SimGrid_VERSION_STRING})
+ if(SimGrid_VERSION)
+ set(SimGrid_VERSION "${SimGrid_VERSION}.")
+ endif()
+ string(REGEX REPLACE ${SimGrid_VERSION_REGEX} "${SimGrid_VERSION}\\2" SimGrid_VERSION ${match})
+ set(SimGrid_VERSION_${CMAKE_MATCH_1} ${CMAKE_MATCH_2})
+ endforeach()
+ unset(SimGrid_VERSION_STRING)
+ unset(SimGrid_VERSION_REGEX)
+endif ()
-message(STATUS "SimGrid found in ${SimGrid_PATH} (version ${SimGrid_VERSION})")
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(SimGrid
+ FOUND_VAR SimGrid_FOUND
+ REQUIRED_VARS SimGrid_INCLUDE_DIR SimGrid_LIBRARY
+ VERSION_VAR SimGrid_VERSION
+)
+if (SimGrid_FOUND AND NOT CMAKE_VERSION VERSION_LESS 2.8.12)
+ 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 ${SimGrid_LIBRARY}
+ )
+ # We need C++11, so check for it just in case the user removed it since compiling SimGrid
+ if (NOT CMAKE_VERSION VERSION_LESS 3.8)
+ # 3.8+ allows us to simply require C++11 (or higher)
+ set_property(TARGET SimGrid::SimGrid PROPERTY INTERFACE_COMPILE_FEATURES cxx_std_11)
+ elseif (NOT CMAKE_VERSION VERSION_LESS 3.1)
+ # 3.1+ is similar but for certain features. We pick just one
+ set_property(TARGET SimGrid::SimGrid PROPERTY INTERFACE_COMPILE_FEATURES cxx_alias_templates)
+ else ()
+ # Old CMake can't do much. Just check the CXX_FLAGS and inform the user when a C++11 feature does not work
+ include(CheckCXXSourceCompiles)
+ set(CMAKE_REQUIRED_FLAGS "${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")
+ endif ()
+ unset(_SIMGRID_CXX11_ENABLED CACHE)
+ endif ()
+endif ()
