mirror of
https://github.com/llvm/llvm-project.git
synced 2025-04-14 16:36:42 +00:00
613a077b05
When building Flang with Clang, we need to do the same quadmath.h wrapping as we do for flang-rt. I extracted the CMake code into FlangCommon.cmake, and cleaned up the arguments passing to execute_process (note that `-###` was treated as `-` in the original code, because `#` starts a comment). I believe the Clang command does not require the input source file, so I removed it as well.
342 lines
13 KiB
CMake
342 lines
13 KiB
CMake
#===-- CMakeLists.txt ------------------------------------------------------===#
|
|
#
|
|
# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
# See https://llvm.org/LICENSE.txt for license information.
|
|
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
#
|
|
#===------------------------------------------------------------------------===#
|
|
#
|
|
# Build instructions for the flang-rt library. This is file is intended to be
|
|
# included using the LLVM_ENABLE_RUNTIMES mechanism.
|
|
#
|
|
#===------------------------------------------------------------------------===#
|
|
|
|
if (NOT LLVM_RUNTIMES_BUILD)
|
|
message(FATAL_ERROR "Use this CMakeLists.txt from LLVM's runtimes build system.
|
|
Example:
|
|
cmake <llvm-project>/runtimes -DLLVM_ENABLE_RUNTIMES=flang-rt
|
|
")
|
|
endif ()
|
|
|
|
set(LLVM_SUBPROJECT_TITLE "Flang-RT")
|
|
set(FLANG_RT_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}")
|
|
set(FLANG_RT_BINARY_DIR "${CMAKE_CURRENT_BINARY_DIR}")
|
|
set(FLANG_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../flang")
|
|
|
|
# CMake 3.24 is the first version of CMake that directly recognizes Flang.
|
|
# LLVM's requirement is only CMake 3.20, teach CMake 3.20-3.23 how to use Flang.
|
|
if (CMAKE_VERSION VERSION_LESS "3.24")
|
|
cmake_path(GET CMAKE_Fortran_COMPILER STEM _Fortran_COMPILER_STEM)
|
|
if (_Fortran_COMPILER_STEM STREQUAL "flang-new" OR _Fortran_COMPILER_STEM STREQUAL "flang")
|
|
include(CMakeForceCompiler)
|
|
CMAKE_FORCE_Fortran_COMPILER("${CMAKE_Fortran_COMPILER}" "LLVMFlang")
|
|
|
|
set(CMAKE_Fortran_COMPILER_ID "LLVMFlang")
|
|
set(CMAKE_Fortran_COMPILER_VERSION "${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}")
|
|
|
|
set(CMAKE_Fortran_SUBMODULE_SEP "-")
|
|
set(CMAKE_Fortran_SUBMODULE_EXT ".mod")
|
|
|
|
set(CMAKE_Fortran_PREPROCESS_SOURCE
|
|
"<CMAKE_Fortran_COMPILER> -cpp <DEFINES> <INCLUDES> <FLAGS> -E <SOURCE> > <PREPROCESSED_SOURCE>")
|
|
|
|
set(CMAKE_Fortran_FORMAT_FIXED_FLAG "-ffixed-form")
|
|
set(CMAKE_Fortran_FORMAT_FREE_FLAG "-ffree-form")
|
|
|
|
set(CMAKE_Fortran_MODDIR_FLAG "-module-dir")
|
|
|
|
set(CMAKE_Fortran_COMPILE_OPTIONS_PREPROCESS_ON "-cpp")
|
|
set(CMAKE_Fortran_COMPILE_OPTIONS_PREPROCESS_OFF "-nocpp")
|
|
set(CMAKE_Fortran_POSTPROCESS_FLAG "-ffixed-line-length-72")
|
|
|
|
set(CMAKE_Fortran_COMPILE_OPTIONS_TARGET "--target=")
|
|
|
|
set(CMAKE_Fortran_LINKER_WRAPPER_FLAG "-Wl,")
|
|
set(CMAKE_Fortran_LINKER_WRAPPER_FLAG_SEP ",")
|
|
endif ()
|
|
endif ()
|
|
enable_language(Fortran)
|
|
|
|
|
|
list(APPEND CMAKE_MODULE_PATH
|
|
"${FLANG_RT_SOURCE_DIR}/cmake/modules"
|
|
"${FLANG_SOURCE_DIR}/cmake/modules"
|
|
)
|
|
include(AddFlangRT)
|
|
include(GetToolchainDirs)
|
|
include(FlangCommon)
|
|
include(HandleCompilerRT)
|
|
include(ExtendPath)
|
|
|
|
|
|
############################
|
|
# Build Mode Introspection #
|
|
############################
|
|
|
|
# Determine whether we are in the runtimes/runtimes-bins directory of a
|
|
# bootstrap build.
|
|
set(LLVM_TREE_AVAILABLE OFF)
|
|
if (LLVM_LIBRARY_OUTPUT_INTDIR AND LLVM_RUNTIME_OUTPUT_INTDIR AND PACKAGE_VERSION)
|
|
set(LLVM_TREE_AVAILABLE ON)
|
|
endif()
|
|
|
|
# Path to LLVM development tools (FileCheck, llvm-lit, not, ...)
|
|
set(LLVM_TOOLS_DIR "${LLVM_BINARY_DIR}/bin")
|
|
|
|
# Determine build and install paths.
|
|
# The build path is absolute, but the install dir is relative, CMake's install
|
|
# command has to apply CMAKE_INSTALL_PREFIX itself.
|
|
get_toolchain_library_subdir(toolchain_lib_subdir)
|
|
if (LLVM_TREE_AVAILABLE)
|
|
# In a bootstrap build emit the libraries into a default search path in the
|
|
# build directory of the just-built compiler. This allows using the
|
|
# just-built compiler without specifying paths to runtime libraries.
|
|
#
|
|
# Despite Clang in the name, get_clang_resource_dir does not depend on Clang
|
|
# being added to the build. Flang uses the same resource dir as clang.
|
|
include(GetClangResourceDir)
|
|
get_clang_resource_dir(FLANG_RT_OUTPUT_RESOURCE_DIR PREFIX "${LLVM_LIBRARY_OUTPUT_INTDIR}/..")
|
|
get_clang_resource_dir(FLANG_RT_INSTALL_RESOURCE_PATH_DEFAULT)
|
|
|
|
extend_path(FLANG_RT_OUTPUT_RESOURCE_LIB_DIR "${FLANG_RT_OUTPUT_RESOURCE_DIR}" "${toolchain_lib_subdir}")
|
|
else ()
|
|
# In a standalone runtimes build, do not write into LLVM_BINARY_DIR. It may be
|
|
# read-only and/or shared by multiple runtimes with different build
|
|
# configurations (e.g. Debug/Release). Use the runtime's own lib dir like any
|
|
# non-toolchain library.
|
|
# For the install prefix, still use the resource dir assuming that Flang will
|
|
# be installed there using the same prefix. This is to not have a difference
|
|
# between bootstrap and standalone runtimes builds.
|
|
set(FLANG_RT_OUTPUT_RESOURCE_DIR "${CMAKE_CURRENT_BINARY_DIR}")
|
|
set(FLANG_RT_INSTALL_RESOURCE_PATH_DEFAULT "lib${LLVM_LIBDIR_SUFFIX}/clang/${LLVM_VERSION_MAJOR}")
|
|
|
|
extend_path(FLANG_RT_OUTPUT_RESOURCE_LIB_DIR "${FLANG_RT_OUTPUT_RESOURCE_DIR}" "lib${LLVM_LIBDIR_SUFFIX}")
|
|
endif ()
|
|
set(FLANG_RT_INSTALL_RESOURCE_PATH "${FLANG_RT_INSTALL_RESOURCE_PATH_DEFAULT}"
|
|
CACHE PATH "Path to install runtime libraries to (default: clang resource dir)")
|
|
extend_path(FLANG_RT_INSTALL_RESOURCE_LIB_PATH "${FLANG_RT_INSTALL_RESOURCE_PATH}" "${toolchain_lib_subdir}")
|
|
cmake_path(NORMAL_PATH FLANG_RT_OUTPUT_RESOURCE_DIR)
|
|
cmake_path(NORMAL_PATH FLANG_RT_INSTALL_RESOURCE_PATH)
|
|
# FIXME: For the libflang_rt.so, the toolchain resource lib dir is not a good
|
|
# destination because it is not a ld.so default search path.
|
|
# The machine where the executable is eventually executed may not be the
|
|
# machine where the Flang compiler and its resource dir is installed, so
|
|
# setting RPath by the driver is not an solution. It should belong into
|
|
# /usr/lib/<triple>/libflang_rt.so, like e.g. libgcc_s.so.
|
|
# But the linker as invoked by the Flang driver also requires
|
|
# libflang_rt.so to be found when linking and the resource lib dir is
|
|
# the only reliable location.
|
|
cmake_path(NORMAL_PATH FLANG_RT_OUTPUT_RESOURCE_LIB_DIR)
|
|
cmake_path(NORMAL_PATH FLANG_RT_INSTALL_RESOURCE_LIB_PATH)
|
|
|
|
|
|
#################
|
|
# Build Options #
|
|
#################
|
|
|
|
# Important: flang-rt user options must be prefixed with "FLANG_RT_". Variables
|
|
# with this prefix will be forwarded in bootstrap builds.
|
|
|
|
option(FLANG_RT_INCLUDE_TESTS "Generate build targets for the flang-rt unit and regression-tests." "${LLVM_INCLUDE_TESTS}")
|
|
|
|
# Provide an interface to link against the LLVM libc/libc++ projects directly.
|
|
set(FLANG_RT_SUPPORTED_PROVIDERS system llvm)
|
|
set(FLANG_RT_LIBC_PROVIDER "system" CACHE STRING "Specify C library to use. Supported values are ${FLANG_RT_SUPPORTED_PROVIDERS}.")
|
|
if (NOT "${FLANG_RT_LIBC_PROVIDER}" IN_LIST FLANG_RT_SUPPORTED_PROVIDERS)
|
|
message(FATAL_ERROR "Unsupported library: '${FLANG_RT_RUNTIME_PROVIDER}'. Supported values are ${FLANG_RT_SUPPORTED_PROVIDERS}.")
|
|
endif ()
|
|
|
|
set(FLANG_RT_LIBCXX_PROVIDER "system" CACHE STRING "Specify C++ library to use. Supported values are ${FLANG_RT_SUPPORTED_PROVIDERS}.")
|
|
if (NOT "${FLANG_RT_LIBCXX_PROVIDER}" IN_LIST FLANG_RT_SUPPORTED_PROVIDERS)
|
|
message(FATAL_ERROR "Unsupported library: '${FLANG_RT_LIBCXX_PROVIDER}'. Supported values are ${FLANG_RT_SUPPORTED_PROVIDERS}.")
|
|
endif ()
|
|
|
|
option(FLANG_RT_ENABLE_STATIC "Build Flang-RT as a static library." ON)
|
|
if (WIN32)
|
|
# Windows DLL currently not implemented.
|
|
set(FLANG_RT_ENABLE_SHARED OFF)
|
|
else ()
|
|
# TODO: Enable by default to increase test coverage, and which version of the
|
|
# library should be the user's choice anyway.
|
|
# Currently, the Flang driver adds `-L"libdir" -lflang_rt` as linker
|
|
# argument, which leaves the choice which library to use to the linker.
|
|
# Since most linkers prefer the shared library, this would constitute a
|
|
# breaking change unless the driver is changed.
|
|
option(FLANG_RT_ENABLE_SHARED "Build Flang-RT as a shared library." OFF)
|
|
endif ()
|
|
if (NOT FLANG_RT_ENABLE_STATIC AND NOT FLANG_RT_ENABLE_SHARED)
|
|
message(FATAL_ERROR "
|
|
Must build at least one type of library
|
|
(FLANG_RT_ENABLE_STATIC=ON, FLANG_RT_ENABLE_SHARED=ON, or both)
|
|
")
|
|
endif ()
|
|
|
|
|
|
set(FLANG_RT_EXPERIMENTAL_OFFLOAD_SUPPORT "" CACHE STRING "Compile Flang-RT with GPU support (CUDA or OpenMP)")
|
|
set_property(CACHE FLANG_RT_EXPERIMENTAL_OFFLOAD_SUPPORT PROPERTY STRINGS
|
|
""
|
|
CUDA
|
|
OpenMP
|
|
)
|
|
if (NOT FLANG_RT_EXPERIMENTAL_OFFLOAD_SUPPORT)
|
|
# Support for GPUs disabled
|
|
elseif (FLANG_RT_EXPERIMENTAL_OFFLOAD_SUPPORT STREQUAL "CUDA")
|
|
# Support for CUDA
|
|
set(FLANG_RT_LIBCUDACXX_PATH "" CACHE PATH "Path to libcu++ package installation")
|
|
option(FLANG_RT_CUDA_RUNTIME_PTX_WITHOUT_GLOBAL_VARS "Do not compile global variables' definitions when producing PTX library" OFF)
|
|
elseif (FLANG_RT_EXPERIMENTAL_OFFLOAD_SUPPORT STREQUAL "OpenMP")
|
|
# Support for OpenMP offloading
|
|
set(FLANG_RT_DEVICE_ARCHITECTURES "all" CACHE STRING
|
|
"List of OpenMP device architectures to be used to compile the Fortran runtime (e.g. 'gfx1103;sm_90')"
|
|
)
|
|
|
|
if (FLANG_RT_DEVICE_ARCHITECTURES STREQUAL "all")
|
|
# TODO: support auto detection on the build system.
|
|
set(all_amdgpu_architectures
|
|
"gfx700;gfx701;gfx801;gfx803;gfx900;gfx902;gfx906"
|
|
"gfx908;gfx90a;gfx90c;gfx940;gfx1010;gfx1030"
|
|
"gfx1031;gfx1032;gfx1033;gfx1034;gfx1035;gfx1036"
|
|
"gfx1100;gfx1101;gfx1102;gfx1103;gfx1150;gfx1151"
|
|
"gfx1152;gfx1153")
|
|
set(all_nvptx_architectures
|
|
"sm_35;sm_37;sm_50;sm_52;sm_53;sm_60;sm_61;sm_62"
|
|
"sm_70;sm_72;sm_75;sm_80;sm_86;sm_89;sm_90")
|
|
set(all_gpu_architectures
|
|
"${all_amdgpu_architectures};${all_nvptx_architectures}")
|
|
set(FLANG_RT_DEVICE_ARCHITECTURES ${all_gpu_architectures})
|
|
endif()
|
|
list(REMOVE_DUPLICATES FLANG_RT_DEVICE_ARCHITECTURES)
|
|
else ()
|
|
message(FATAL_ERROR "Invalid value '${FLANG_RT_EXPERIMENTAL_OFFLOAD_SUPPORT}' for FLANG_RT_EXPERIMENTAL_OFFLOAD_SUPPORT; must be empty, 'CUDA', or 'OpenMP'")
|
|
endif ()
|
|
|
|
|
|
option(FLANG_RT_INCLUDE_CUF "Build the CUDA Fortran runtime (libflang_rt.cuda.a)" OFF)
|
|
if (FLANG_RT_INCLUDE_CUF)
|
|
find_package(CUDAToolkit REQUIRED)
|
|
endif()
|
|
|
|
|
|
########################
|
|
# System Introspection #
|
|
########################
|
|
|
|
# The GPU targets require a few mandatory arguments to make the standard CMake
|
|
# check flags happy.
|
|
if ("${LLVM_RUNTIMES_TARGET}" MATCHES "^amdgcn")
|
|
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -nogpulib")
|
|
elseif ("${LLVM_RUNTIMES_TARGET}" MATCHES "^nvptx")
|
|
set(CMAKE_REQUIRED_FLAGS
|
|
"${CMAKE_REQUIRED_FLAGS} -flto -c -Wno-unused-command-line-argument")
|
|
endif()
|
|
|
|
include(CheckCXXSymbolExists)
|
|
include(CheckCXXSourceCompiles)
|
|
check_cxx_symbol_exists(strerror_r string.h HAVE_STRERROR_R)
|
|
# Can't use symbol exists here as the function is overloaded in C++
|
|
check_cxx_source_compiles(
|
|
"#include <string.h>
|
|
int main() {
|
|
char buf[4096];
|
|
return strerror_s(buf, 4096, 0);
|
|
}
|
|
"
|
|
HAVE_DECL_STRERROR_S)
|
|
|
|
# Search for clang_rt.builtins library. Need in addition to msvcrt.
|
|
if (WIN32)
|
|
find_compiler_rt_library(builtins FLANG_RT_BUILTINS_LIBRARY)
|
|
endif ()
|
|
|
|
# Build with _XOPEN_SOURCE on AIX to avoid errors caused by _ALL_SOURCE.
|
|
# We need to enable the large-file API as well.
|
|
if (UNIX AND CMAKE_SYSTEM_NAME MATCHES "AIX")
|
|
add_compile_definitions(_XOPEN_SOURCE=700)
|
|
add_compile_definitions(_LARGE_FILE_API)
|
|
endif ()
|
|
|
|
# Check whether the compiler can undefine a macro using the "-U" flag.
|
|
# Aternatively, we could use
|
|
# CMAKE_CXX_COMPILER_FRONTEND_VARIANT STREQUAL "GNU"
|
|
# but some older versions of CMake don't define it for GCC itself.
|
|
check_cxx_compiler_flag("-UTESTFLAG" FLANG_RT_SUPPORTS_UNDEFINE_FLAG)
|
|
|
|
# Check whether -fno-lto is supported.
|
|
check_cxx_compiler_flag(-fno-lto FLANG_RT_HAS_FNO_LTO_FLAG)
|
|
|
|
# Check whether -nostdlibinc is supported.
|
|
check_cxx_compiler_flag(-nostdlibinc FLANG_RT_HAS_NOSTDLIBINC_FLAG)
|
|
|
|
# Check whether -nostdlib is supported.
|
|
check_cxx_compiler_flag(-nostdlib FLANG_RT_HAS_NOSTDLIB_FLAG)
|
|
|
|
# Check whether -stdlib= is supported.
|
|
check_cxx_compiler_flag(-stdlib=platform FLANG_RT_HAS_STDLIB_FLAG)
|
|
|
|
# Check whether -Wl,--as-needed is supported.
|
|
check_linker_flag(C "LINKER:--as-needed" LINKER_SUPPORTS_AS_NEEDED)
|
|
if (LINKER_SUPPORTS_AS_NEEDED)
|
|
set(LINKER_AS_NEEDED_OPT "LINKER:--as-needed")
|
|
endif()
|
|
|
|
# Different platform may have different name for the POSIX thread library.
|
|
# For example, libpthread.a on AIX. Search for it as it is needed when
|
|
# building the shared flang_rt.runtime.so.
|
|
find_package(Threads)
|
|
|
|
# function checks
|
|
find_package(Backtrace)
|
|
set(HAVE_BACKTRACE ${Backtrace_FOUND})
|
|
set(BACKTRACE_HEADER ${Backtrace_HEADER})
|
|
|
|
|
|
#####################
|
|
# Build Preparation #
|
|
#####################
|
|
|
|
include(HandleLibs)
|
|
|
|
if (FLANG_RT_EXPERIMENTAL_OFFLOAD_SUPPORT AND FLANG_RT_INCLUDE_TESTS)
|
|
# If Fortran runtime is built as CUDA library, the linking
|
|
# of targets that link flang-rt must be done
|
|
# with CUDA_RESOLVE_DEVICE_SYMBOLS.
|
|
# CUDA language must be enabled for CUDA_RESOLVE_DEVICE_SYMBOLS
|
|
# to take effect.
|
|
enable_language(CUDA)
|
|
endif()
|
|
|
|
|
|
# C++17 is required for flang-rt; user or other runtimes may override this.
|
|
# GTest included later also requires C++17.
|
|
set(CMAKE_CXX_STANDARD 17 CACHE STRING "C++ standard to conform to")
|
|
set(CMAKE_CXX_STANDARD_REQUIRED YES)
|
|
|
|
|
|
configure_file(cmake/config.h.cmake.in config.h)
|
|
if (FLANG_INCLUDE_QUADMATH_H)
|
|
configure_file("cmake/quadmath_wrapper.h.in" "${FLANG_RT_BINARY_DIR}/quadmath_wrapper.h")
|
|
endif ()
|
|
|
|
# The bootstrap build will create a phony target with the same as the top-level
|
|
# directory ("flang-rt") and delegate it to the runtimes build dir.
|
|
# AddFlangRT will add all non-EXCLUDE_FROM_ALL targets to it.
|
|
add_custom_target(flang-rt)
|
|
|
|
|
|
###################
|
|
# Build Artifacts #
|
|
###################
|
|
|
|
add_subdirectory(lib)
|
|
|
|
if (LLVM_INCLUDE_EXAMPLES)
|
|
add_subdirectory(examples)
|
|
endif ()
|
|
|
|
if (FLANG_RT_INCLUDE_TESTS)
|
|
add_subdirectory(unittests)
|
|
add_subdirectory(test)
|
|
else ()
|
|
add_custom_target(check-flang-rt)
|
|
endif()
|