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# Try to find the GMP library | ||
# https://gmplib.org/ | ||
# | ||
# This module supports requiring a minimum version, e.g. you can do | ||
# find_package(GMP 6.0.0) | ||
# to require version 6.0.0 to newer of GMP. | ||
# | ||
# Once done this will define | ||
# | ||
# GMP_FOUND - system has GMP lib with correct version | ||
# GMP_INCLUDES - the GMP include directory | ||
# GMP_LIBRARIES - the GMP library | ||
# GMP_VERSION - GMP version | ||
# | ||
# Copyright (c) 2016 Jack Poulson, <jack.poulson@gmail.com> | ||
# Redistribution and use is allowed according to the terms of the BSD license. | ||
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||
find_path(GMP_INCLUDES NAMES gmp.h PATHS ${GMPlib_ROOT} $ENV{GMPDIR} ${INCLUDE_INSTALL_DIR} PATH_SUFFIXES include) | ||
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||
# Set GMP_FIND_VERSION to 5.1.0 if no minimum version is specified | ||
if(NOT GMP_FIND_VERSION) | ||
if(NOT GMP_FIND_VERSION_MAJOR) | ||
set(GMP_FIND_VERSION_MAJOR 5) | ||
endif() | ||
if(NOT GMP_FIND_VERSION_MINOR) | ||
set(GMP_FIND_VERSION_MINOR 1) | ||
endif() | ||
if(NOT GMP_FIND_VERSION_PATCH) | ||
set(GMP_FIND_VERSION_PATCH 0) | ||
endif() | ||
set(GMP_FIND_VERSION | ||
"${GMP_FIND_VERSION_MAJOR}.${GMP_FIND_VERSION_MINOR}.${GMP_FIND_VERSION_PATCH}") | ||
endif() | ||
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||
message(STATUS "GMP_INCLUDES=${GMP_INCLUDES}") | ||
if(GMP_INCLUDES) | ||
# Since the GMP version macros may be in a file included by gmp.h of the form | ||
# gmp-.*[_]?.*.h (e.g., gmp-x86_64.h), we search each of them. | ||
file(GLOB GMP_HEADERS "${GMP_INCLUDES}/gmp.h" "${GMP_INCLUDES}/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}.${GMP_PATCHLEVEL_VERSION}) | ||
endif() | ||
endforeach() | ||
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||
# Check whether found version exists and exceeds the minimum requirement | ||
if(NOT GMP_VERSION) | ||
set(GMP_VERSION_OK FALSE) | ||
message(STATUS "GMP version was not detected") | ||
elseif(${GMP_VERSION} VERSION_LESS ${GMP_FIND_VERSION}) | ||
set(GMP_VERSION_OK FALSE) | ||
message(STATUS "GMP version ${GMP_VERSION} found in ${GMP_INCLUDES}, " | ||
"but at least version ${GMP_FIND_VERSION} is required") | ||
else() | ||
set(GMP_VERSION_OK TRUE) | ||
endif() | ||
endif() | ||
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||
find_library(GMP_LIBRARIES gmp PATHS ${GMPlib_ROOT} $ENV{GMPDIR} ${LIB_INSTALL_DIR} PATH_SUFFIXES lib) | ||
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include(FindPackageHandleStandardArgs) | ||
find_package_handle_standard_args(GMP DEFAULT_MSG | ||
GMP_INCLUDES GMP_LIBRARIES GMP_VERSION_OK) | ||
mark_as_advanced(GMP_INCLUDES GMP_LIBRARIES) |
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