dash/cmake_modules/Findgmp.cmake

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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.
include(BrewHelper)
find_brew_prefix(_GMP_BREW_HINT gmp)
find_path(GMP_INCLUDES
NAMES
gmp.h
PATHS
$ENV{GMPDIR} ${INCLUDE_INSTALL_DIR}
PATH_SUFFIXES
include
HINTS
${_GMP_BREW_HINT}
)
# Set GMP_FIND_VERSION to 5.1.0 if no minimum version is specified
if(NOT GMP_FIND_VERSION)
if(NOT GMP_FIND_VERSION_MAJOR)
set(GMP_FIND_VERSION_MAJOR 5)
endif()
if(NOT GMP_FIND_VERSION_MINOR)
set(GMP_FIND_VERSION_MINOR 1)
endif()
if(NOT GMP_FIND_VERSION_PATCH)
set(GMP_FIND_VERSION_PATCH 0)
endif()
set(GMP_FIND_VERSION
"${GMP_FIND_VERSION_MAJOR}.${GMP_FIND_VERSION_MINOR}.${GMP_FIND_VERSION_PATCH}")
endif()
message("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}.${GMP_PATCHLEVEL_VERSION})
endif()
endforeach()
# Check whether found version exists and exceeds the minimum requirement
if(NOT GMP_VERSION)
set(GMP_VERSION_OK FALSE)
message(STATUS "GMP version was not detected")
elseif(${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()
if(STBIN)
set(_gmp_lib_name libgmp.a)
else()
set(_gmp_lib_name libgmp.so)
endif()
find_library(GMP_LIBRARIES
NAMES
${_gmp_lib_name} gmp.lib libgmp-10 libgmp gmp
HINTS
${_GMP_BREW_HINT}
INCLUDE_DIRS
${GMP_INCLUDES}
PATHS
$ENV{GMPDIR} ${LIB_INSTALL_DIR}
)
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(gmp DEFAULT_MSG
GMP_INCLUDES GMP_LIBRARIES GMP_VERSION_OK)
mark_as_advanced(GMP_INCLUDES GMP_LIBRARIES)