================ @@ -0,0 +1,165 @@ +#===-- 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(FLANGRT_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}") +set(FLANGRT_BINARY_DIR "${CMAKE_CURRENT_BINARY_DIR}") +set(FLANG_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../flang") + +enable_language(Fortran) + +list(APPEND CMAKE_MODULE_PATH + "${FLANGRT_SOURCE_DIR}/cmake/modules" + "${FLANG_SOURCE_DIR}/cmake/modules" + ) +include(AddFlangRT) +include(FlangCommon) + + +############################ +# Build Mode Introspection # +############################ + +# Setting these variables from an LLVM build is sufficient that flang-rt can +# construct the output paths, so it can behave as if it were in-tree here. +set(LLVM_TREE_AVAILABLE OFF) +if (LLVM_LIBRARY_OUTPUT_INTDIR AND LLVM_RUNTIME_OUTPUT_INTDIR AND PACKAGE_VERSION) + # This is a bootstap build + set(LLVM_TREE_AVAILABLE ON) +endif() + +if (LLVM_TREE_AVAILABLE) + # Despite Clang in the name, get_clang_resource_dir does not depend on Clang being added to the build + # flang-new uses the same resource dir as clang. + include(GetClangResourceDir) + get_clang_resource_dir(FLANGRT_BUILD_LIB_DIR PREFIX "${LLVM_LIBRARY_OUTPUT_INTDIR}/.." SUBDIR "lib${LLVM_LIBDIR_SUFFIX}") + get_clang_resource_dir(FLANGRT_INSTALL_LIB_DIR SUBDIR "lib${LLVM_LIBDIR_SUFFIX}") # No prefix, CMake's install command find the install prefix itself +else () + set(FLANGRT_BUILD_LIB_DIR "${LLVM_LIBRARY_OUTPUT_INTDIR}") + set(FLANGRT_INSTALL_LIB_DIR "lib${LLVM_LIBDIR_SUFFIX}") +endif () + +if (DEFINED WIN32) + set(FLANGRT_BUILD_LIB_DIR "${FLANGRT_BUILD_LIB_DIR}/windows") + set(FLANGRT_INSTALL_LIB_DIR "${FLANGRT_INSTALL_LIB_DIR}/windows") +elseif (LLVM_ENABLE_PER_TARGET_RUNTIME_DIR) + set(FLANGRT_BUILD_LIB_DIR "${FLANGRT_BUILD_LIB_DIR}/${LLVM_TARGET_TRIPLE}") + set(FLANGRT_INSTALL_LIB_DIR "${FLANGRT_INSTALL_LIB_DIR}/${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." "${LLVM_INCLUDE_TESTS}") + +set(FLANG_RT_EXPERIMENTAL_OFFLOAD_SUPPORT "" CACHE STRING "Compile flang-rt with GPU support (CUDA or OpenMP)") +set_property(CACHE FLANG_RT_EXPERIMENTAL_OFFLOAD_SUPPORT PROPERTY STRINGS + "" + CUDA + OpenMP + ) +if (NOT FLANG_RT_EXPERIMENTAL_OFFLOAD_SUPPORT) +elseif (FLANG_RT_EXPERIMENTAL_OFFLOAD_SUPPORT STREQUAL "CUDA") + set(FLANG_RT_LIBCUDACXX_PATH "" CACHE PATH "Path to libcu++ package installation") + option(FLANG_RT_CUDA_RUNTIME_PTX_WITHOUT_GLOBAL_VARS "Do not compile global variables' definitions when producing PTX library" OFF) +elseif (FLANG_RT_EXPERIMENTAL_OFFLOAD_SUPPORT STREQUAL "OpenMP") +set(FLANG_RT_DEVICE_ARCHITECTURES "all" CACHE STRING + "List of OpenMP device architectures to be used to compile the Fortran runtime (e.g. 'gfx1103;sm_90')") +else () + message(FATAL_ERROR "Invalid value '${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}" FLANGRT_LIBCALL) + else () + set(FLANGRT_LIBCALL "") + endif () +endif () + + +##################### +# Build Preparation # +##################### + +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) + +# Disable libstdc++/libc++ assertions, even in an LLVM_ENABLE_ASSERTIONS build, +# to avoid an unwanted dependency on libstdc++/libc++.so. +add_definitions(-U_GLIBCXX_ASSERTIONS) +add_definitions(-U_LIBCPP_ENABLE_ASSERTIONS) ---------------- Meinersbur wrote:
This is 1:1 from the current Flang: https://github.com/llvm/llvm-project/blob/f58ce1152703ca753794b8cef36da30bd2668d0f/flang/runtime/CMakeLists.txt#L101-L104 The equivalent "modern CMake" function `target_compile_definitions` does not accept `-U`. It is not global though; the effect is limited to following artifacts in this CMakeLists.txt and in add_subdirectory. Anyway, I hope I found an equivalent in https://github.com/llvm/llvm-project/pull/110217/commits/3cf5f3fc31b024370fd8ddbb994362742e35d2a0. 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
