# Small Cmake script to test for the support of the new c++11 standard
# and the existence of the new standard template library libc++

# The script is working with cmake 2.6.4 and 2.8.10,
# so it should work also with all versions in between 
CMake_Minimum_Required(VERSION 2.6 FATAL_ERROR)

Project(TestEnvironment C CXX Fortran)


#--- Check for compilers
If(NOT CMAKE_CXX_COMPILER)
  Message(FATAL_ERROR "Could not find a C++ compiler. Was checking for ENV{CXX}. Either choose a differnt one or install it.")
EndIf()

If(NOT CMAKE_C_COMPILER)
  Message(FATAL_ERROR "Could not find a C compiler. Was checking for ENV{CXX}. Either choose a differnt one or install it.")
EndIf()

If(NOT CMAKE_Fortran_COMPILER)
  Message(FATAL_ERROR "Could not find any Fortran compiler. Please set the correct PATH or install one.")
Else()
  get_filename_component(_FC ${CMAKE_Fortran_COMPILER} NAME)
EndIf()

Include(CheckCXXCompilerFlag)

#---Check for cxx11
CHECK_CXX_COMPILER_FLAG("-std=c++11" HAS_CXX11)
If(HAS_CXX11)
  Message(STATUS "Current compiler does suppport -std=c++11 option.")
Else()
  Message(STATUS "Current compiler does not suppport -std=c++11 option.")
EndIf()

#---Check for libc++
CHECK_CXX_COMPILER_FLAG("-std=c++11 -stdlib=libc++" HAS_LIBCXX)
If(HAS_LIBCXX)
  Message(STATUS "Current compiler does suppport -stdlib=libc++")
Else()
  Message(STATUS "Current compiler does not suppport -stdlib=libc++")
EndIf()

  Configure_File($ENV{SIMPATH}/test/configure.in $ENV{SIMPATH}/test/configure @ONLY)

#---Check for X11 which is mandatory for building ROOT

find_package(X11 REQUIRED)

If(NOT X11_FOUND)
  Message(STATUS "X11_INCLUDE_DIR: ${X11_INCLUDE_DIR}")
  Message(STATUS "X11_LIBRARIES: ${X11_LIBRARIES}")
  Message(FATAL_ERROR "libX11 and X11 headers must be installed.")
EndIf()

If(NOT X11_Xpm_FOUND)
  Message(STATUS "X11_Xpm_INCLUDE_PATH: ${X11_Xpm_INCLUDE_PATH}")
  Message(STATUS "X11_Xpm_LIB: ${X11_Xpm_LIB}")
 Message(FATAL_ERROR "libXpm and Xpm headers must be installed.")
EndIf()

If(NOT X11_Xft_FOUND)
  Message(STATUS "X11_Xft_INCLUDE_PATH: ${X11_Xft_INCLUDE_PATH}")
  Message(STATUS "X11_Xft_LIB: ${X11_Xft_LIB}")
  Message(FATAL_ERROR "libXft and Xft headers must be installed.")
EndIf()

If(NOT X11_Xext_FOUND)
  Message(STATUS "X11_Xext_INCLUDE_PATH: ${X11_Xext_INCLUDE_PATH}")
  Message(STATUS "X11_Xext_LIB: ${X11_Xext_LIB}")
  Message(FATAL_ERROR "libXext and Xext headers must be installed.")
EndIf()

If (X11_FOUND AND X11_Xpm_FOUND AND X11_Xft_FOUND AND X11_Xext_FOUND)
  Message(STATUS "Found all necessary X11 features.")
EndIf()

#---Check for OpenGL installation

find_package(OpenGL)

If(NOT OPENGL_FOUND OR NOT OPENGL_GLU_FOUND)
  Message(FATAL_ERROR "OpenGL and Mesa must be installed ")
Else()
  Message(STATUS "Found all necessary OpenGL features.")
EndIf()

#---Check for needed programs

Find_Program(WGET_FOUND NAMES wget) 
Find_Program(CURL_FOUND NAMES curl)
If(WGET_FOUND OR CURL_FOUND)
  Set(DOWNLOADER_FOUND TRUE)
EndIf()
If(NOT DOWNLOADER_FOUND)
  Message(FATAL_ERROR "Neither wget nor curl found in PATH. You need to install one of them")
EndIf()

Find_Program(SVN_FOUND NAMES svn) 
If(NOT SVN_FOUND)
  Message(FATAL_ERROR "svn is not found in PATH. You need to install it")
EndIf()

Find_Program(MAKE_FOUND NAMES make) 
If(NOT MAKE_FOUND)
  Message(FATAL_ERROR "make is not found in PATH. You need to install it")
EndIf()

Find_Program(GIT_FOUND NAMES git) 
If(NOT GIT_FOUND)
  Message(FATAL_ERROR "git is not found in PATH. You need to install it")
EndIf()

Find_Program(PATCH_FOUND NAMES patch) 
If(NOT PATCH_FOUND)
  Message(FATAL_ERROR "patch is not found in PATH. You need to install it")
EndIf()

If(DOWNLOADER_FOUND AND SVN_FOUND AND GIT_FOUND AND PATCH_FOUND AND MAKE_FOUND)
  Message(STATUS "Found all necessary programs in PATH.")
EndIf()


#---Create the file with version info
set(CMAKE_MODULE_PATH "$ENV{SIMPATH}/test")
include(GenerateVersionInfo)