================ @@ -0,0 +1,226 @@ +#===-- 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. +# +#===------------------------------------------------------------------------===# + +set(LLVM_SUBPROJECT_TITLE "Fortran Runtime") +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(FlangCommon) + + +############################ +# Build Mode Introspection # +############################ + +# Setting these variables from an LLVM build is sufficient that flang-rt can +# construct the output paths, so it can behave as if it was in-tree here. +set(LLVM_TREE_AVAILABLE OFF) +if (LLVM_LIBRARY_OUTPUT_INTDIR AND LLVM_RUNTIME_OUTPUT_INTDIR AND PACKAGE_VERSION) + # This is a bootstap build + set(LLVM_TREE_AVAILABLE ON) +endif() + +# Path to LLVM development tools (FileCheck, llvm-lit, not, ...) +set(LLVM_TOOLS_DIR "${LLVM_BINARY_DIR}/bin") + +if (LLVM_TREE_AVAILABLE) + # In a bootstrap build emit the libraries into a default search path in the + # build directory of the just-built compiler. This allows using the + # just-built compiler without specifying paths to runtime libraries. + # + # Despite Clang in the name, get_clang_resource_dir does not depend on Clang + # being added to the build. Flang uses the same resource dir as clang. + include(GetClangResourceDir) + get_clang_resource_dir(FLANG_RT_BUILD_LIB_DIR PREFIX "${LLVM_LIBRARY_OUTPUT_INTDIR}/.." SUBDIR "lib${LLVM_LIBDIR_SUFFIX}") + get_clang_resource_dir(FLANG_RT_INSTALL_LIB_DIR SUBDIR "lib${LLVM_LIBDIR_SUFFIX}") # No prefix, CMake's install command finds the install prefix itself +else () + # In a runtimes build never write into LLVM's build dir. It might be reused + # for mutliple Flang-RT builds (e.g. Debug/Release). Instead create our own + # library directory. + # + # TODO: Support multi-config generators + set(FLANG_RT_BUILD_LIB_DIR "${CMAKE_BINARY_DIR}/lib${LLVM_LIBDIR_SUFFIX}") + set(FLANG_RT_INSTALL_LIB_DIR "lib${LLVM_LIBDIR_SUFFIX}") +endif () + +if (DEFINED WIN32) + set(FLANG_RT_BUILD_LIB_DIR "${FLANG_RT_BUILD_LIB_DIR}/windows") + set(FLANG_RT_INSTALL_LIB_DIR "${FLANG_RT_INSTALL_LIB_DIR}/windows") +elseif (LLVM_ENABLE_PER_TARGET_RUNTIME_DIR) + set(FLANG_RT_BUILD_LIB_DIR "${FLANG_RT_BUILD_LIB_DIR}/${LLVM_TARGET_TRIPLE}") + set(FLANG_RT_INSTALL_LIB_DIR "${FLANG_RT_INSTALL_LIB_DIR}/${LLVM_TARGET_TRIPLE}") +endif () + + +################# +# Build Options # +################# + +# Important: flang-rt user options must be prefixed with "FLANG_RT_". Variables +# with this prefix will be forwarded in bootstrap builds. + +option(FLANG_RT_INCLUDE_TESTS "Generate build targets for the flang-rt unit and regression-tests." "${LLVM_INCLUDE_TESTS}") + + +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')" + ) +else () + message(FATAL_ERROR "Invalid value '${FLANG_RT_EXPERIMENTAL_OFFLOAD_SUPPORT}' for FLANG_RT_EXPERIMENTAL_OFFLOAD_SUPPORT; must be empty, 'CUDA', or 'OpenMP'") +endif () + + +option(FLANG_RT_ENABLE_CUF "Compile CUDA Fortran runtime sources" OFF) +if (FLANG_RT_ENABLE_CUF) + find_package(CUDAToolkit REQUIRED) +endif() + + +######################## +# System Introspection # +######################## + +include(CheckCXXSymbolExists) +include(CheckCXXSourceCompiles) +check_cxx_symbol_exists(strerror_r string.h HAVE_STRERROR_R) +# Can't use symbol exists here as the function is overloaded in C++ +check_cxx_source_compiles( + "#include <string.h> + int main() { + char buf[4096]; + return strerror_s(buf, 4096, 0); + } + " + HAVE_DECL_STRERROR_S) + + +# Search for clang_rt.builtins library. +if (WIN32) + execute_process( + COMMAND "${CMAKE_CXX_COMPILER}" "-print-libgcc-file-name" "-rtlib=compiler-rt" + RESULT_VARIABLE CXX_COMPILER_PRINT_LIBGCC_PATH_FAILURE + OUTPUT_VARIABLE CXX_COMPILER_PRINT_LIBGCC_PATH_RESULT + ERROR_QUIET + ) + if (NOT CXX_COMPILER_PRINT_LIBGCC_PATH_FAILURE AND CXX_COMPILER_PRINT_LIBGCC_PATH_RESULT) + string(STRIP "${CXX_COMPILER_PRINT_LIBGCC_PATH_RESULT}" FLANG_RT_LIBCALL) + else () + set(FLANG_RT_LIBCALL "") + endif () +endif () ---------------- Meinersbur wrote:
Changed to make use of `find_compiler_rt_library`. I wasn't aware of that function, thanks. https://github.com/llvm/llvm-project/pull/110217 _______________________________________________ llvm-branch-commits mailing list llvm-branch-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-branch-commits
