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      1 # Try to find the MPFR library
      2 # See http://www.mpfr.org/
      3 #
      4 # This module supports requiring a minimum version, e.g. you can do
      5 #   find_package(MPFR 2.3.0)
      6 # to require version 2.3.0 to newer of MPFR.
      7 #
      8 # Once done this will define
      9 #
     10 #  MPFR_FOUND - system has MPFR lib with correct version
     11 #  MPFR_INCLUDES - the MPFR include directory
     12 #  MPFR_LIBRARIES - the MPFR library
     13 #  MPFR_VERSION - MPFR version
     14 
     15 # Copyright (c) 2006, 2007 Montel Laurent, <montel (a] kde.org>
     16 # Copyright (c) 2008, 2009 Gael Guennebaud, <g.gael (a] free.fr>
     17 # Copyright (c) 2010 Jitse Niesen, <jitse (a] maths.leeds.ac.uk>
     18 # Redistribution and use is allowed according to the terms of the BSD license.
     19 
     20 # Set MPFR_INCLUDES
     21 
     22 find_path(MPFR_INCLUDES
     23   NAMES
     24   mpfr.h
     25   PATHS
     26   $ENV{GMPDIR}
     27   ${INCLUDE_INSTALL_DIR}
     28 )
     29 
     30 # Set MPFR_FIND_VERSION to 1.0.0 if no minimum version is specified
     31 
     32 if(NOT MPFR_FIND_VERSION)
     33   if(NOT MPFR_FIND_VERSION_MAJOR)
     34     set(MPFR_FIND_VERSION_MAJOR 1)
     35   endif(NOT MPFR_FIND_VERSION_MAJOR)
     36   if(NOT MPFR_FIND_VERSION_MINOR)
     37     set(MPFR_FIND_VERSION_MINOR 0)
     38   endif(NOT MPFR_FIND_VERSION_MINOR)
     39   if(NOT MPFR_FIND_VERSION_PATCH)
     40     set(MPFR_FIND_VERSION_PATCH 0)
     41   endif(NOT MPFR_FIND_VERSION_PATCH)
     42 
     43   set(MPFR_FIND_VERSION "${MPFR_FIND_VERSION_MAJOR}.${MPFR_FIND_VERSION_MINOR}.${MPFR_FIND_VERSION_PATCH}")
     44 endif(NOT MPFR_FIND_VERSION)
     45 
     46 
     47 if(MPFR_INCLUDES)
     48 
     49   # Set MPFR_VERSION
     50   
     51   file(READ "${MPFR_INCLUDES}/mpfr.h" _mpfr_version_header)
     52   
     53   string(REGEX MATCH "define[ \t]+MPFR_VERSION_MAJOR[ \t]+([0-9]+)" _mpfr_major_version_match "${_mpfr_version_header}")
     54   set(MPFR_MAJOR_VERSION "${CMAKE_MATCH_1}")
     55   string(REGEX MATCH "define[ \t]+MPFR_VERSION_MINOR[ \t]+([0-9]+)" _mpfr_minor_version_match "${_mpfr_version_header}")
     56   set(MPFR_MINOR_VERSION "${CMAKE_MATCH_1}")
     57   string(REGEX MATCH "define[ \t]+MPFR_VERSION_PATCHLEVEL[ \t]+([0-9]+)" _mpfr_patchlevel_version_match "${_mpfr_version_header}")
     58   set(MPFR_PATCHLEVEL_VERSION "${CMAKE_MATCH_1}")
     59   
     60   set(MPFR_VERSION ${MPFR_MAJOR_VERSION}.${MPFR_MINOR_VERSION}.${MPFR_PATCHLEVEL_VERSION})
     61   
     62   # Check whether found version exceeds minimum version
     63   
     64   if(${MPFR_VERSION} VERSION_LESS ${MPFR_FIND_VERSION})
     65     set(MPFR_VERSION_OK FALSE)
     66     message(STATUS "MPFR version ${MPFR_VERSION} found in ${MPFR_INCLUDES}, "
     67                    "but at least version ${MPFR_FIND_VERSION} is required")
     68   else(${MPFR_VERSION} VERSION_LESS ${MPFR_FIND_VERSION})
     69     set(MPFR_VERSION_OK TRUE)
     70   endif(${MPFR_VERSION} VERSION_LESS ${MPFR_FIND_VERSION})
     71 
     72 endif(MPFR_INCLUDES)
     73 
     74 # Set MPFR_LIBRARIES
     75 
     76 find_library(MPFR_LIBRARIES mpfr PATHS $ENV{GMPDIR} ${LIB_INSTALL_DIR})
     77 
     78 # Epilogue
     79 
     80 include(FindPackageHandleStandardArgs)
     81 find_package_handle_standard_args(MPFR DEFAULT_MSG
     82                                   MPFR_INCLUDES MPFR_LIBRARIES MPFR_VERSION_OK)
     83 mark_as_advanced(MPFR_INCLUDES MPFR_LIBRARIES)
     84