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| 1 | +# Try to find the GMP library |
| 2 | +# https://gmplib.org/ |
| 3 | +# |
| 4 | +# This module supports requiring a minimum version, e.g. you can do |
| 5 | +# find_package(GMP 6.0.0) |
| 6 | +# to require version 6.0.0 to newer of GMP. |
| 7 | +# |
| 8 | +# Once done this will define |
| 9 | +# |
| 10 | +# GMP_FOUND - system has GMP lib with correct version |
| 11 | +# GMP_INCLUDES - the GMP include directory |
| 12 | +# GMP_LIBRARIES - the GMP library |
| 13 | +# GMP_VERSION - GMP version |
| 14 | +# |
| 15 | +# Copyright (c) 2016 Jack Poulson, <[email protected]> |
| 16 | +# Redistribution and use is allowed according to the terms of the BSD license. |
| 17 | + |
| 18 | +find_path(GMP_INCLUDES NAMES gmp.h PATHS $ENV{GMPDIR} ${INCLUDE_INSTALL_DIR}) |
| 19 | + |
| 20 | +# Set GMP_FIND_VERSION to 5.1.0 if no minimum version is specified |
| 21 | +if(NOT GMP_FIND_VERSION) |
| 22 | + if(NOT GMP_FIND_VERSION_MAJOR) |
| 23 | + set(GMP_FIND_VERSION_MAJOR 5) |
| 24 | + endif() |
| 25 | + if(NOT GMP_FIND_VERSION_MINOR) |
| 26 | + set(GMP_FIND_VERSION_MINOR 1) |
| 27 | + endif() |
| 28 | + if(NOT GMP_FIND_VERSION_PATCH) |
| 29 | + set(GMP_FIND_VERSION_PATCH 0) |
| 30 | + endif() |
| 31 | + set(GMP_FIND_VERSION |
| 32 | + "${GMP_FIND_VERSION_MAJOR}.${GMP_FIND_VERSION_MINOR}.${GMP_FIND_VERSION_PATCH}") |
| 33 | +endif() |
| 34 | + |
| 35 | +message("GMP_INCLUDES=${GMP_INCLUDES}") |
| 36 | +if(GMP_INCLUDES) |
| 37 | + # Since the GMP version macros may be in a file included by gmp.h of the form |
| 38 | + # gmp-.*[_]?.*.h (e.g., gmp-x86_64.h), we search each of them. |
| 39 | + file(GLOB GMP_HEADERS "${GMP_INCLUDES}/gmp.h" "${GMP_INCLUDES}/gmp-*.h") |
| 40 | + foreach(gmp_header_filename ${GMP_HEADERS}) |
| 41 | + file(READ "${gmp_header_filename}" _gmp_version_header) |
| 42 | + string(REGEX MATCH |
| 43 | + "define[ \t]+__GNU_MP_VERSION[ \t]+([0-9]+)" _gmp_major_version_match |
| 44 | + "${_gmp_version_header}") |
| 45 | + if(_gmp_major_version_match) |
| 46 | + set(GMP_MAJOR_VERSION "${CMAKE_MATCH_1}") |
| 47 | + string(REGEX MATCH "define[ \t]+__GNU_MP_VERSION_MINOR[ \t]+([0-9]+)" |
| 48 | + _gmp_minor_version_match "${_gmp_version_header}") |
| 49 | + set(GMP_MINOR_VERSION "${CMAKE_MATCH_1}") |
| 50 | + string(REGEX MATCH "define[ \t]+__GNU_MP_VERSION_PATCHLEVEL[ \t]+([0-9]+)" |
| 51 | + _gmp_patchlevel_version_match "${_gmp_version_header}") |
| 52 | + set(GMP_PATCHLEVEL_VERSION "${CMAKE_MATCH_1}") |
| 53 | + set(GMP_VERSION |
| 54 | + ${GMP_MAJOR_VERSION}.${GMP_MINOR_VERSION}.${GMP_PATCHLEVEL_VERSION}) |
| 55 | + endif() |
| 56 | + endforeach() |
| 57 | + |
| 58 | + # Check whether found version exists and exceeds the minimum requirement |
| 59 | + if(NOT GMP_VERSION) |
| 60 | + set(GMP_VERSION_OK FALSE) |
| 61 | + message(STATUS "GMP version was not detected") |
| 62 | + elseif(${GMP_VERSION} VERSION_LESS ${GMP_FIND_VERSION}) |
| 63 | + set(GMP_VERSION_OK FALSE) |
| 64 | + message(STATUS "GMP version ${GMP_VERSION} found in ${GMP_INCLUDES}, " |
| 65 | + "but at least version ${GMP_FIND_VERSION} is required") |
| 66 | + else() |
| 67 | + set(GMP_VERSION_OK TRUE) |
| 68 | + endif() |
| 69 | +endif() |
| 70 | + |
| 71 | +find_library(GMP_LIBRARIES gmp PATHS $ENV{GMPDIR} ${LIB_INSTALL_DIR}) |
| 72 | + |
| 73 | +include(FindPackageHandleStandardArgs) |
| 74 | +find_package_handle_standard_args(GMP DEFAULT_MSG |
| 75 | + GMP_INCLUDES GMP_LIBRARIES GMP_VERSION_OK) |
| 76 | +mark_as_advanced(GMP_INCLUDES GMP_LIBRARIES) |
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