92523a35a8
Some build bots have not been updated to the new minimal CMake version. Reverting for now and ping the buildbot owners. This reverts commit 44c6b905f8527635e49bb3ea97dea315f92d38ec.
73 lines
2.7 KiB
CMake
73 lines
2.7 KiB
CMake
#
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#//===----------------------------------------------------------------------===//
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#//
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#// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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#// See https://llvm.org/LICENSE.txt for license information.
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#// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#//
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#//===----------------------------------------------------------------------===//
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#
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include(GNUInstallDirs)
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# Checking a linker flag to build a shared library
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# There is no real trivial way to do this in CMake, so we implement it here
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# this will have ${boolean} = TRUE if the flag succeeds, otherwise FALSE.
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function(libomp_check_linker_flag flag boolean)
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if(NOT DEFINED "${boolean}")
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set(retval TRUE)
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set(library_source
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"int foo(int a) { return a*a; }")
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set(cmake_source
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"cmake_minimum_required(VERSION 3.13.4)
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project(foo C)
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set(CMAKE_SHARED_LINKER_FLAGS \"${flag}\")
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add_library(foo SHARED src_to_link.c)")
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# Compiling as a part of runtimes introduces ARCH-unknown-linux-gnu as a part
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# of a working directory. So adding a guard for unknown.
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set(failed_regexes "[Ee]rror;[Uu]nknown[^-];[Ss]kipping;LINK : warning;Unsupported command line")
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set(base_dir ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/link_flag_check_${boolean})
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file(MAKE_DIRECTORY ${base_dir})
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file(MAKE_DIRECTORY ${base_dir}/build)
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file(WRITE ${base_dir}/src_to_link.c "${library_source}")
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file(WRITE ${base_dir}/CMakeLists.txt "${cmake_source}")
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message(STATUS "Performing Test ${boolean}")
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try_compile(
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try_compile_result
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${base_dir}/build
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${base_dir}
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foo
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OUTPUT_VARIABLE OUTPUT)
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if(try_compile_result)
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foreach(regex IN LISTS failed_regexes)
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# Ignore the warning about the newer or unknown CUDA version.
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if(("${OUTPUT}" MATCHES ${regex}) AND NOT ("${OUTPUT}" MATCHES "Unknown CUDA version"))
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set(retval FALSE)
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endif()
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endforeach()
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else()
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set(retval FALSE)
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endif()
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if(${retval})
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set(${boolean} 1 CACHE INTERNAL "Test ${boolean}")
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message(STATUS "Performing Test ${boolean} - Success")
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file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
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"Performing C Linker Flag test ${boolean} succeeded with the following output:\n"
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"${OUTPUT}\n"
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"Source file was:\n${library_source}\n")
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else()
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set(${boolean} "" CACHE INTERNAL "Test ${boolean}")
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message(STATUS "Performing Test ${boolean} - Failed")
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file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
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"Performing C Linker Flag test ${boolean} failed with the following output:\n"
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"${OUTPUT}\n"
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"Source file was:\n${library_source}\n")
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endif()
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set(${boolean} ${retval} PARENT_SCOPE)
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endif()
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endfunction()
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