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reduce the differences between the s4u_async examples
[simgrid.git] / FindSimGrid.cmake
index 220d690..e92af15 100644 (file)
@@ -1,44 +1,60 @@
-#IF YOU HAVE INSTALL SIMGRID IN A SPECIAL DIRECTORY
-#YOU CAN SPECIFY SIMGRID_ROOT OR GRAS_ROOT
-
-find_library(HAVE_SIMGRID_LIB
-    NAME simgrid
-    HINTS
-       $ENV{SIMGRID_ROOT}
-    PATH_SUFFIXES lib
-)
+# Cmake macro to search for the SimGrid library. 
+
+# Copyright (c) 2016. The SimGrid Team (version 20161210).
+#
+# This file is free software; you can redistribute it and/or modify it
+# under the terms of the license (GNU LGPL) which comes with this package.
+
+# The user can hint a path using the SimGrid_PATH option.
+#
+# Once done, the following will be defined:
+#  
+#  SimGrid_INCLUDE_DIR - the SimGrid include directories
+#  SimGrid_LIBRARY - link your simulator against it to use SimGrid
+#
+# Afterward, you should probably do the following:
+#
+#  include_directories("${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
 
-find_path(SIMGRID_INCLUDES msg.h
-    HINTS
-       $ENV{SIMGRID_ROOT}
-    PATH_SUFFIXES include
+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
 )
+find_library(SimGrid_LIBRARY
+  NAMES simgrid
+  HINTS ${SimGrid_PATH}/lib /usr/lib /usr/local/lib /opt/simgrid/lib
+)
+mark_as_advanced(SimGrid_INCLUDE_DIR)
+mark_as_advanced(SimGrid_LIBRARY)
+
+if (NOT EXISTS "${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()
+
+# 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}")
+  
+
+message("-- SimGrid found in ${SimGrid_PATH} (version ${SimGrid_VERSION})")
+
 
-message(STATUS "Looking for lib SimGrid")
-if(HAVE_SIMGRID_LIB)
-  message(STATUS "Looking for lib SimGrid - found")
-  if(CMAKE_CACHE_MAJOR_VERSION EQUAL "2" AND CMAKE_CACHE_MINOR_VERSION GREATER "7") #need cmake version 2.8
-         get_filename_component(simgrid_version ${HAVE_SIMGRID_LIB} REALPATH)
-         string(REPLACE "${HAVE_SIMGRID_LIB}." "" simgrid_version "${simgrid_version}")
-         string(REGEX MATCH "^[0-9]" SIMGRID_MAJOR_VERSION "${simgrid_version}")
-         string(REGEX MATCH "^[0-9].[0-9]" SIMGRID_MINOR_VERSION "${simgrid_version}")
-         string(REGEX MATCH "^[0-9].[0-9].[0-9]" SIMGRID_PATCH_VERSION "${simgrid_version}")
-         string(REGEX REPLACE "^${SIMGRID_MINOR_VERSION}." "" SIMGRID_PATCH_VERSION "${SIMGRID_PATCH_VERSION}") 
-         string(REGEX REPLACE "^${SIMGRID_MAJOR_VERSION}." "" SIMGRID_MINOR_VERSION "${SIMGRID_MINOR_VERSION}")
-         message(STATUS "Simgrid version : ${SIMGRID_MAJOR_VERSION}.${SIMGRID_MINOR_VERSION}")
-  endif(CMAKE_CACHE_MAJOR_VERSION EQUAL "2" AND CMAKE_CACHE_MINOR_VERSION GREATER "7")
-else(HAVE_SIMGRID_LIB)
-  message(STATUS "Looking for lib SimGrid - not found")
-endif(HAVE_SIMGRID_LIB)
-
-message(STATUS "Looking for msg.h")
-if(SIMGRID_INCLUDES)
-  message(STATUS "Looking for msg.h - found")
-else(SIMGRID_INCLUDES)
-  message(STATUS "Looking for msg.h - not found")
-endif(SIMGRID_INCLUDES)
-
-if(HAVE_SIMGRID_LIB AND SIMGRID_INCLUDES)
-else(HAVE_SIMGRID_LIB AND SIMGRID_INCLUDES)
-    message(FATAL_ERROR "Unable to find both the library and the include files. Setting the environment variable SIMGRID_ROOT may help.")
-endif(HAVE_SIMGRID_LIB AND SIMGRID_INCLUDES)
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