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# Try to find the GNU Multiple Precision Arithmetic Library (GMP)
# See http://gmplib.org/
#
# This module supports requiring a minimum version, e.g. you can do
# find_package(GMP 6.1.0)
# to require version 6.1.0 to newer of GMP.
#
# Once done this will define
#
# GMP_FOUND - system has GMP lib
# GMP_ROOT - the GMP install prefix
# GMP_INCLUDE_DIRS - the GMP include directory
# GMP_LIBRARY_DIRS - the GMP library directory
# GMP_LIBRARIES - Libraries needed to use GMP
# GMP_VERSION - GMP version
# Copyright (c) 2016 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 GMP_FIND_VERSION to 1.0.0 if no minimum version is specified
if(NOT GMP_FIND_VERSION)
if(NOT GMP_FIND_VERSION_MAJOR)
set(GMP_FIND_VERSION_MAJOR 5)
endif()
if(NOT GMP_FIND_VERSION_MINOR)
set(GMP_FIND_VERSION_MINOR 1)
endif()
if(NOT GMP_FIND_VERSION_PATCH)
set(GMP_FIND_VERSION_PATCH 0)
endif()
set(GMP_FIND_VERSION
"${GMP_FIND_VERSION_MAJOR}.${GMP_FIND_VERSION_MINOR}.${GMP_FIND_VERSION_PATCH}")
endif()
macro(_gmp_check_version)
# Since the GMP version macros may be in a file included by gmp.h of the form
# gmp-.*[_]?.*.h (e.g., gmp-x86_64.h), we search each of them.
file(GLOB GMP_HEADERS "${GMP_INCLUDE_DIRS}/gmp.h" "${GMP_INCLUDE_DIRS}/gmp-*.h")
foreach(gmp_header_filename ${GMP_HEADERS})
file(READ "${gmp_header_filename}" _gmp_version_header)
string(REGEX MATCH
"define[ \t]+__GNU_MP_VERSION[ \t]+([0-9]+)" _gmp_major_version_match
"${_gmp_version_header}")
if(_gmp_major_version_match)
set(GMP_MAJOR_VERSION "${CMAKE_MATCH_1}")
string(REGEX MATCH "define[ \t]+__GNU_MP_VERSION_MINOR[ \t]+([0-9]+)"
_gmp_minor_version_match "${_gmp_version_header}")
set(GMP_MINOR_VERSION "${CMAKE_MATCH_1}")
string(REGEX MATCH "define[ \t]+__GNU_MP_VERSION_PATCHLEVEL[ \t]+([0-9]+)"
_gmp_patchlevel_version_match "${_gmp_version_header}")
set(GMP_PATCHLEVEL_VERSION "${CMAKE_MATCH_1}")
set(GMP_VERSION
${GMP_MAJOR_VERSION}.${GMP_MINOR_VERSION}.${GMP_PATCHLEVEL_VERSION})
endif()
endforeach()
#If a direct search fails, use try_run to read out gmp_version.
#This is for systems that put multiarch headers in other places.
if(NOT GMP_VERSION)
file(WRITE ${CMAKE_BINARY_DIR}/gmp_version.c [[
#include <stdio.h>
#include "gmp.h"
int main(){ printf("%s",gmp_version); return 0;}
]])
try_run(GMP_TEST_SUCCESS GMP_COMPILE_SUCCESS
${CMAKE_BINARY_DIR} ${CMAKE_BINARY_DIR}/gmp_version.c
LINK_LIBRARIES gmp
RUN_OUTPUT_VARIABLE GMP_VERSION)
endif()
# Check whether found version exists and exceeds the minimum requirement
if(NOT GMP_VERSION)
set(GMP_VERSION_OK FALSE)
message(STATUS "GMP version was not detected")
elseif(${GMP_VERSION} VERSION_LESS ${GMP_FIND_VERSION})
set(GMP_VERSION_OK FALSE)
message(STATUS "GMP version ${GMP_VERSION} found in ${GMP_INCLUDE_DIRS}, "
"but at least version ${GMP_FIND_VERSION} is required")
else()
set(GMP_VERSION_OK TRUE)
endif()
endmacro(_gmp_check_version)
if(NOT GMP_VERSION_OK)
set(GMP_INCLUDE_DIRS NOTFOUND)
set(GMP_LIBRARY_DIRS NOTFOUND)
set(GMP_LIBRARIES NOTFOUND)
set(GMPXX_LIBRARIES NOTFOUND)
# search first if an GMPConfig.cmake is available in the system,
# if successful this would set GMP_INCLUDE_DIRS and the rest of
# the script will work as usual
find_package(GMP ${GMP_FIND_VERSION} NO_MODULE QUIET)
if(NOT GMP_INCLUDE_DIRS)
find_path(GMP_INCLUDE_DIRS NAMES gmp.h
HINTS ENV GMPDIR ENV GMPDIR
PATHS ${INCLUDE_INSTALL_DIR} ${CMAKE_INSTALL_PREFIX}/include)
endif()
if(GMP_INCLUDE_DIRS)
_GMP_check_version()
endif()
if(NOT GMP_LIBRARIES)
find_library(GMP_LIBRARIES NAMES gmp
HINTS ENV GMPDIR ENV GMPDIR
PATHS ${LIB_INSTALL_DIR} ${CMAKE_INSTALL_PREFIX}/lib)
find_library(GMPXX_LIBRARIES NAMES gmpxx
HINTS ENV GMPDIR ENV GMPDIR
PATHS ${LIB_INSTALL_DIR} ${CMAKE_INSTALL_PREFIX}/lib)
set(GMP_LIBRARIES ${GMPXX_LIBRARIES} ${GMP_LIBRARIES})
endif()
if(GMPXX_LIBRARIES)
get_filename_component(GMP_LIBRARY_DIRS "${GMPXX_LIBRARIES}" DIRECTORY)
endif()
string(REGEX REPLACE "/include.*" "" GMP_ROOT "${GMP_INCLUDE_DIRS}")
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(GMP DEFAULT_MSG GMP_ROOT GMP_INCLUDE_DIRS GMP_LIBRARIES GMP_LIBRARY_DIRS GMP_VERSION_OK)
mark_as_advanced(GMP_ROOT GMP_INCLUDE_DIRS GMP_LIBRARIES GMP_LIBRARY_DIRS)
endif()
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