From: Flamefire Date: Mon, 12 Mar 2018 13:46:45 +0000 (+0100) Subject: Modernize FindSimGrid X-Git-Tag: v3.19~60^2 X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/commitdiff_plain/bef9e56fd601b15454f003bb8d0b66db491ddf9f Modernize FindSimGrid --- diff --git a/FindSimGrid.cmake b/FindSimGrid.cmake index 8a79cdf9d8..9d0f30be82 100644 --- a/FindSimGrid.cmake +++ b/FindSimGrid.cmake @@ -1,60 +1,92 @@ -# 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 # -# Afterward, you should probably do the following: +# CMake >= 2.8.12: +# Target SimGrid::Simgrid +# +# Use as: +# target_link_libraries(your-simulator SimGrid::SimGrid) +# +# Older CMake (< 2.8.12) +# SimGrid_INCLUDE_DIR - the SimGrid include directories +# SimGrid_LIBRARY - link your simulator against it to use SimGrid # -# include_directories("${SimGrid_INCLUDE_DIR}" SYSTEM) -# target_link_libraries(your-simulator ${SimGrid_LIBRARY}) +# Use as: +# include_directories("${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 +# This could be improved: +# - 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 + PATHS /opt/simgrid/include ) find_library(SimGrid_LIBRARY NAMES simgrid - HINTS ${SimGrid_PATH}/lib /usr/lib /usr/local/lib /opt/simgrid/lib + PATHS /opt/simgrid/lib ) mark_as_advanced(SimGrid_INCLUDE_DIR) mark_as_advanced(SimGrid_LIBRARY) -if (NOT EXISTS "${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]+)$") + file(STRINGS "${SimGrid_INCLUDE_DIR}/simgrid_config.h" SimGrid_VERSION_STRING REGEX ${SimGrid_VERSION_REGEX}) + set(SimGrid_VERSION "") -# Extract the actual version number -file(READ "${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 ${SimGrid_LIBRARY} + ) + # We need C++11, so check for it + if (NOT CMAKE_VERSION VERSION_LESS 3.8) + # 3.8+ allows us to simply require C++11 (or higher) + set_property(TARGET SimGrid::SimGrid PROPERTY INTERFACE_COMPILE_FEATURES cxx_std_11) + elseif (NOT CMAKE_VERSION VERSION_LESS 3.1) + # 3.1+ is similar but for certain features. We pick just one + set_property(TARGET SimGrid::SimGrid PROPERTY INTERFACE_COMPILE_FEATURES cxx_alias_templates) + else () + # Old CMake can't do much. Just check the CXX_FLAGS and inform the user when a C++11 feature does not work + include(CheckCXXSourceCompiles) + set(CMAKE_REQUIRED_FLAGS "${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 this library. Enable it with e.g. -std=c++11") + endif () + unset(_SIMGRID_CXX11_ENABLED CACHE) + endif () +endif ()