Differential D5449 Diff 16873 cmake/modules/FindGMP.cmake

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cmake/modules/FindGMP.cmake

	# Try to find the GMP libraries			# Copyright (c) 2017-2020 The Bitcoin developers
				# Distributed under the MIT software license, see the accompanying
				# file COPYING or http://www.opensource.org/licenses/mit-license.php.

				#.rst
				# FindGMP
				# -------------
				#
				# Find the GNU Multiple Precision Arithmetic library. The following components
				# are available::
				# gmp
				#
				# This will define the following variables::
				#
	# GMP_FOUND - system has GMP lib			# GMP_FOUND - system has GMP lib
	# GMP_INCLUDE_DIR - the GMP include directory			# GMP_INCLUDE_DIRS - the GMP include directories
	# GMP_LIBRARY - Library needed to use GMP			# GMP_LIBRARIES - Library needed to use GMP
	# GMPXX_LIBRARY - Library needed to use GMP C++ API			# GMP_VERSION - The library version MAJOR.MINOR.PATCH
				# GMP_VERSION_MAJOR - The library MAJOR version number
	if(GMP_INCLUDE_DIR AND GMP_LIBRARY)			# GMP_VERSION_MINOR - The library MINOR version number
	# Already in cache, be silent			# GMP_VERSION_PATCH - The library PATCH version number
	set(GMP_FIND_QUIETLY TRUE)			#
				# And the following imported target::
				#
				# GMP::gmp

				include(BrewHelper)
				find_brew_prefix(BREW_HINT gmp)

				find_path(GMP_INCLUDE_DIR
				NAMES gmp.h
				HINTS ${BREW_HINT}
				)
				set(GMP_INCLUDE_DIRS "${GMP_INCLUDE_DIR}")
				mark_as_advanced(GMP_INCLUDE_DIR)

				if(NOT DEFINED GMP_VERSION)
				# Extract version information from the gmp.h header.
				if(GMP_INCLUDE_DIR)
				# Read the version from file gmp.h into a variable.
				file(READ "${GMP_INCLUDE_DIR}/gmp.h" _GMP_HEADER)

				# Parse the version into variables.
				string(REGEX REPLACE
				".__GNU_MP_VERSION[ \t]+([0-9]+)." "\\1"
				GMP_VERSION_MAJOR
				"${_GMP_HEADER}"
				)
				string(REGEX REPLACE
				".__GNU_MP_VERSION_MINOR[ \t]+([0-9]+)." "\\1"
				GMP_VERSION_MINOR
				"${_GMP_HEADER}"
				)
				string(REGEX REPLACE
				".__GNU_MP_VERSION_PATCHLEVEL[ \t]+([0-9]+)." "\\1"
				GMP_VERSION_PATCH
				"${_GMP_HEADER}"
				)
				else()
				# Set some garbage values to the versions since we didn't find a file to
				# read.
				set(GMP_VERSION_MAJOR "0")
				set(GMP_VERSION_MINOR "0")
				set(GMP_VERSION_PATCH "0")
	endif()			endif()

	find_path(GMP_INCLUDE_DIR NAMES gmp.h)			# Cache the result.
	find_library(GMP_LIBRARY NAMES gmp libgmp)			set(GMP_VERSION_MAJOR ${GMP_VERSION_MAJOR}
	find_library(GMPXX_LIBRARY NAMES gmpxx libgmpxx)			CACHE INTERNAL "GMP major version number"
				)
				set(GMP_VERSION_MINOR ${GMP_VERSION_MINOR}
				CACHE INTERNAL "GMP minor version number"
				)
				set(GMP_VERSION_PATCH ${GMP_VERSION_PATCH}
				CACHE INTERNAL "GMP patch version number"
				)
				# The actual returned/output version variable (the others can be used if
				# needed).
				set(GMP_VERSION
				"${GMP_VERSION_MAJOR}.${GMP_VERSION_MINOR}.${GMP_VERSION_PATCH}"
				CACHE INTERNAL "GMP full version"
				)
				endif()

	message(STATUS "GMP libs: " ${GMP_LIBRARY} " " ${GMPXX_LIBRARY})			include(ExternalLibraryHelper)
				find_component(GMP gmp
				NAMES gmp
				HINTS ${BREW_HINT}
				INCLUDE_DIRS ${GMP_INCLUDE_DIRS}
				)

	include(FindPackageHandleStandardArgs)			include(FindPackageHandleStandardArgs)
	find_package_handle_standard_args(GMP DEFAULT_MSG GMP_INCLUDE_DIR GMP_LIBRARY)			find_package_handle_standard_args(GMP
				REQUIRED_VARS GMP_INCLUDE_DIR
	mark_as_advanced(GMP_INCLUDE_DIR GMP_LIBRARY GMPXX_LIBRARY)			VERSION_VAR GMP_VERSION
				HANDLE_COMPONENTS
	set(GMP_LIBRARIES ${GMP_LIBRARY} ${GMPXX_LIBRARY})			)
	set(GMP_INCLUDE_DIRS ${GMP_INCLUDE_DIR})