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# Try to find the MPFR library
# See http://www.mpfr.org/
#
# This module supports requiring a minimum version, e.g. you can do
# find_package(MPFR 2.3.0)
# to require version 2.3.0 to newer of MPFR.
#
# Once done this will define
#
# MPFR_FOUND - system has MPFR lib with correct version
# MPFR_INCLUDE_DIRS - the MPFR include directory
# MPFR_LIBRARIES - the MPFR library
# MPFR_VERSION - MPFR version
# Copyright (c) 2006, 2007 Montel Laurent, <montel@kde.org>
# Copyright (c) 2008, 2009 Gael Guennebaud, <g.gael@free.fr>
# Copyright (c) 2010 Jitse Niesen, <jitse@maths.leeds.ac.uk>
# Copyright (c) 2015 Jack Poulson, <jack.poulson@gmail.com>
# Copyright (c) 2020, Mahrud Sayrafi, <mahrud@umn.edu>
# Redistribution and use is allowed according to the terms of the BSD license.
# Set MPFR_FIND_VERSION to 1.0.0 if no minimum version is specified
if(NOT MPFR_FIND_VERSION)
if(NOT MPFR_FIND_VERSION_MAJOR)
set(MPFR_FIND_VERSION_MAJOR 1)
endif()
if(NOT MPFR_FIND_VERSION_MINOR)
set(MPFR_FIND_VERSION_MINOR 0)
endif()
if(NOT MPFR_FIND_VERSION_PATCH)
set(MPFR_FIND_VERSION_PATCH 0)
endif()
set(MPFR_FIND_VERSION
"${MPFR_FIND_VERSION_MAJOR}.${MPFR_FIND_VERSION_MINOR}.${MPFR_FIND_VERSION_PATCH}")
endif()
macro(_mpfr_check_version)
# Query MPFR_VERSION
file(READ "${MPFR_INCLUDE_DIRS}/mpfr.h" _mpfr_version_header)
string(REGEX MATCH "define[ \t]+MPFR_VERSION_MAJOR[ \t]+([0-9]+)"
_mpfr_major_version_match "${_mpfr_version_header}")
set(MPFR_MAJOR_VERSION "${CMAKE_MATCH_1}")
string(REGEX MATCH "define[ \t]+MPFR_VERSION_MINOR[ \t]+([0-9]+)"
_mpfr_minor_version_match "${_mpfr_version_header}")
set(MPFR_MINOR_VERSION "${CMAKE_MATCH_1}")
string(REGEX MATCH "define[ \t]+MPFR_VERSION_PATCHLEVEL[ \t]+([0-9]+)"
_mpfr_patchlevel_version_match "${_mpfr_version_header}")
set(MPFR_PATCHLEVEL_VERSION "${CMAKE_MATCH_1}")
set(MPFR_VERSION
${MPFR_MAJOR_VERSION}.${MPFR_MINOR_VERSION}.${MPFR_PATCHLEVEL_VERSION})
# Check whether found version exceeds minimum required
if(${MPFR_VERSION} VERSION_LESS ${MPFR_FIND_VERSION})
set(MPFR_VERSION_OK FALSE)
message(STATUS "MPFR version ${MPFR_VERSION} found in ${MPFR_INCLUDE_DIRS}, "
"but at least version ${MPFR_FIND_VERSION} is required")
else()
set(MPFR_VERSION_OK TRUE)
endif()
endmacro(_mpfr_check_version)
if(NOT MPFR_VERSION_OK)
set(MPFR_INCLUDE_DIRS NOTFOUND)
set(MPFR_LIBRARIES NOTFOUND)
# search first if an MPFRConfig.cmake is available in the system,
# if successful this would set MPFR_INCLUDE_DIRS and the rest of
# the script will work as usual
find_package(MPFR ${MPFR_FIND_VERSION} NO_MODULE QUIET)
if(NOT MPFR_INCLUDE_DIRS)
find_path(MPFR_INCLUDE_DIRS NAMES mpfr.h
HINTS ENV MPFRDIR ENV GMPDIR
PATHS ${INCLUDE_INSTALL_DIR} ${CMAKE_INSTALL_PREFIX}/include
)
endif()
if(MPFR_INCLUDE_DIRS)
_MPFR_check_version()
endif()
if(NOT MPFR_LIBRARIES)
find_library(MPFR_LIBRARIES NAMES mpfr
HINTS ENV MPFRDIR ENV GMPDIR
PATHS ${LIB_INSTALL_DIR} ${CMAKE_INSTALL_PREFIX}/lib
)
endif()
string(REGEX REPLACE "/include(/${CMAKE_LIBRARY_ARCHITECTURE}$)?" "" MPFR_ROOT "${MPFR_INCLUDE_DIRS}")
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(MPFR DEFAULT_MSG MPFR_ROOT MPFR_INCLUDE_DIRS MPFR_LIBRARIES MPFR_VERSION_OK)
mark_as_advanced(MPFR_ROOT MPFR_INCLUDE_DIRS MPFR_LIBRARIES)
endif()
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