diff options
Diffstat (limited to 'cmake/FindMPREAL.cmake')
-rw-r--r-- | cmake/FindMPREAL.cmake | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/cmake/FindMPREAL.cmake b/cmake/FindMPREAL.cmake new file mode 100644 index 000000000..947a1ce88 --- /dev/null +++ b/cmake/FindMPREAL.cmake @@ -0,0 +1,103 @@ +# Try to find the MPFR C++ (MPREAL) library +# See http://www.holoborodko.com/pavel/mpreal/ +# +# This module supports requiring a minimum version, e.g. you can do +# find_package(MPREAL 1.8.6) +# to require version 1.8.6 or newer of MPREAL C++. +# +# Once done this will define +# +# MPREAL_FOUND - system has MPREAL lib with correct version +# MPREAL_INCLUDES - MPREAL required include directories +# MPREAL_LIBRARIES - MPREAL required libraries +# MPREAL_VERSION - MPREAL version + +# Copyright (c) 2020 The Eigen Authors. +# Redistribution and use is allowed according to the terms of the BSD license. + +include(CMakeFindDependencyMacro) +find_dependency(MPFR) +find_dependency(GMP) + +# Set MPREAL_INCLUDES +find_path(MPREAL_INCLUDES + NAMES + mpreal.h + PATHS + $ENV{GMPDIR} + ${INCLUDE_INSTALL_DIR} +) + +# Set MPREAL_FIND_VERSION to 1.0.0 if no minimum version is specified + +if(NOT MPREAL_FIND_VERSION) + if(NOT MPREAL_FIND_VERSION_MAJOR) + set(MPREAL_FIND_VERSION_MAJOR 1) + endif() + if(NOT MPREAL_FIND_VERSION_MINOR) + set(MPREAL_FIND_VERSION_MINOR 0) + endif() + if(NOT MPREAL_FIND_VERSION_PATCH) + set(MPREAL_FIND_VERSION_PATCH 0) + endif() + + set(MPREAL_FIND_VERSION "${MPREAL_FIND_VERSION_MAJOR}.${MPREAL_FIND_VERSION_MINOR}.${MPREAL_FIND_VERSION_PATCH}") +endif() + +# Check bugs +# - https://github.com/advanpix/mpreal/issues/7 +# - https://github.com/advanpix/mpreal/issues/9 +set(MPREAL_TEST_PROGRAM " +#include <mpreal.h> +#include <algorithm> +int main(int argc, char** argv) { + const mpfr::mpreal one = 1.0; + const mpfr::mpreal zero = 0.0; + using namespace std; + const mpfr::mpreal smaller = min(one, zero); + return 0; +}") + +if(MPREAL_INCLUDES) + + # Set MPREAL_VERSION + + file(READ "${MPREAL_INCLUDES}/mpreal.h" _mpreal_version_header) + + string(REGEX MATCH "define[ \t]+MPREAL_VERSION_MAJOR[ \t]+([0-9]+)" _mpreal_major_version_match "${_mpreal_version_header}") + set(MPREAL_MAJOR_VERSION "${CMAKE_MATCH_1}") + string(REGEX MATCH "define[ \t]+MPREAL_VERSION_MINOR[ \t]+([0-9]+)" _mpreal_minor_version_match "${_mpreal_version_header}") + set(MPREAL_MINOR_VERSION "${CMAKE_MATCH_1}") + string(REGEX MATCH "define[ \t]+MPREAL_VERSION_PATCHLEVEL[ \t]+([0-9]+)" _mpreal_patchlevel_version_match "${_mpreal_version_header}") + set(MPREAL_PATCHLEVEL_VERSION "${CMAKE_MATCH_1}") + + set(MPREAL_VERSION ${MPREAL_MAJOR_VERSION}.${MPREAL_MINOR_VERSION}.${MPREAL_PATCHLEVEL_VERSION}) + + # Check whether found version exceeds minimum version + + if(${MPREAL_VERSION} VERSION_LESS ${MPREAL_FIND_VERSION}) + set(MPREAL_VERSION_OK FALSE) + message(STATUS "MPREAL version ${MPREAL_VERSION} found in ${MPREAL_INCLUDES}, " + "but at least version ${MPREAL_FIND_VERSION} is required") + else() + set(MPREAL_VERSION_OK TRUE) + + list(APPEND MPREAL_INCLUDES "${MPFR_INCLUDES}" "${GMP_INCLUDES}") + list(REMOVE_DUPLICATES MPREAL_INCLUDES) + + list(APPEND MPREAL_LIBRARIES "${MPFR_LIBRARIES}" "${GMP_LIBRARIES}") + list(REMOVE_DUPLICATES MPREAL_LIBRARIES) + + # Make sure it compiles with the current compiler. + unset(MPREAL_WORKS CACHE) + include(CheckCXXSourceCompiles) + set(CMAKE_REQUIRED_INCLUDES "${MPREAL_INCLUDES}") + set(CMAKE_REQUIRED_LIBRARIES "${MPREAL_LIBRARIES}") + check_cxx_source_compiles("${MPREAL_TEST_PROGRAM}" MPREAL_WORKS) + endif() +endif() + +include(FindPackageHandleStandardArgs) +find_package_handle_standard_args(MPREAL DEFAULT_MSG + MPREAL_INCLUDES MPREAL_VERSION_OK MPREAL_WORKS) +mark_as_advanced(MPREAL_INCLUDES) |