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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@kde.org>
16# Copyright (c) 2008, 2009 Gael Guennebaud, <g.gael@free.fr>
17# Copyright (c) 2010 Jitse Niesen, <jitse@maths.leeds.ac.uk>
18# Redistribution and use is allowed according to the terms of the BSD license.
19
20# Set MPFR_INCLUDES
21
22find_path(MPFR_INCLUDES
23  NAMES
24  mpfr.h
25  PATHS
26  $ENV{GMPDIR}
27  ${INCLUDE_INSTALL_DIR}
28)
29
30# Set MPFR_FIND_VERSION to 1.0.0 if no minimum version is specified
31
32if(NOT MPFR_FIND_VERSION)
33  if(NOT MPFR_FIND_VERSION_MAJOR)
34    set(MPFR_FIND_VERSION_MAJOR 1)
35  endif(NOT MPFR_FIND_VERSION_MAJOR)
36  if(NOT MPFR_FIND_VERSION_MINOR)
37    set(MPFR_FIND_VERSION_MINOR 0)
38  endif(NOT MPFR_FIND_VERSION_MINOR)
39  if(NOT MPFR_FIND_VERSION_PATCH)
40    set(MPFR_FIND_VERSION_PATCH 0)
41  endif(NOT MPFR_FIND_VERSION_PATCH)
42
43  set(MPFR_FIND_VERSION "${MPFR_FIND_VERSION_MAJOR}.${MPFR_FIND_VERSION_MINOR}.${MPFR_FIND_VERSION_PATCH}")
44endif(NOT MPFR_FIND_VERSION)
45
46
47if(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
72endif(MPFR_INCLUDES)
73
74# Set MPFR_LIBRARIES
75
76find_library(MPFR_LIBRARIES mpfr PATHS $ENV{GMPDIR} ${LIB_INSTALL_DIR})
77
78# Epilogue
79
80include(FindPackageHandleStandardArgs)
81find_package_handle_standard_args(MPFR DEFAULT_MSG
82                                  MPFR_INCLUDES MPFR_LIBRARIES MPFR_VERSION_OK)
83mark_as_advanced(MPFR_INCLUDES MPFR_LIBRARIES)
84