[RISCV] Refactor RVV Policy by structure
[llvm-project.git] / libc / CMakeLists.txt
blob8eb45838f954a1096915b433ebf73e7b4d302e59
1 cmake_minimum_required(VERSION 3.13.4)
3 # Default to C++17
4 set(CMAKE_CXX_STANDARD 17)
6 # Use old version of target_sources command which converts the source
7 # file paths to full paths.
8 cmake_policy(SET CMP0076 OLD)
9 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules")
11 # The top-level sourse and binary directories.
12 set(LIBC_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
13 set(LIBC_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR})
14 # The top-level directory in which libc is being built.
15 set(LIBC_BUILD_DIR ${CMAKE_CURRENT_BINARY_DIR})
17 # For a runtimes build we need to manually include tablgen and LLVM directories.
18 if ("libc" IN_LIST LLVM_ENABLE_RUNTIMES)
19   include(TableGen)
20   set(LLVM_LIBC_INCLUDE_DIRS ${LLVM_MAIN_INCLUDE_DIR} ${LLVM_BINARY_DIR}/include)
21 endif()
23 # Path libc/scripts directory.
24 set(LIBC_BUILD_SCRIPTS_DIR "${LIBC_SOURCE_DIR}/utils/build_scripts")
26 # Flags to pass down to the compiler while building the libc functions.
27 set(LIBC_COMPILE_OPTIONS_DEFAULT "" CACHE STRING "Architecture to tell clang to optimize for (e.g. -march=... or -mcpu=...)")
29 include(common_libc_tuners.cmake)
31 list(APPEND LIBC_COMPILE_OPTIONS_DEFAULT ${LIBC_COMMON_TUNE_OPTIONS})
33 # Check --print-resource-dir to find the compiler resource dir if this flag
34 # is supported by the compiler.
35 execute_process(
36   OUTPUT_STRIP_TRAILING_WHITESPACE
37   COMMAND ${CMAKE_CXX_COMPILER} --print-resource-dir
38   RESULT_VARIABLE COMMAND_RETURN_CODE
39   OUTPUT_VARIABLE COMPILER_RESOURCE_DIR
41 # Retrieve the host compiler's resource dir.
42 if(COMMAND_RETURN_CODE EQUAL 0)
43   set(COMPILER_RESOURCE_DIR
44     "${COMPILER_RESOURCE_DIR}" CACHE PATH "path to compiler resource dir"
45   )
46   message(STATUS "Set COMPILER_RESOURCE_DIR to "
47                  "${COMPILER_RESOURCE_DIR} using --print-resource-dir")
48 else()
49   set(COMPILER_RESOURCE_DIR OFF)
50   message(STATUS "COMPILER_RESOURCE_DIR not set
51                   --print-resource-dir not supported by host compiler")
52 endif()
54 option(LLVM_LIBC_FULL_BUILD "Build and test LLVM libc as if it is the full libc" OFF)
55 option(LLVM_LIBC_IMPLEMENTATION_DEFINED_TEST_BEHAVIOR "Build LLVM libc tests assuming our implementation-defined behavior" ON)
56 option(LLVM_LIBC_ENABLE_LINTING "Enables linting of libc source files" OFF)
58 option(LIBC_GPU_BUILD "Build libc for the GPU. All CPU build options will be ignored." OFF)
59 set(LIBC_TARGET_TRIPLE "" CACHE STRING "The target triple for the libc build.")
61 # Defines LIBC_TARGET_ARCHITECTURE and associated macros.
62 include(LLVMLibCArchitectures)
64 if(LIBC_TARGET_ARCHITECTURE_IS_GPU)
65   include(prepare_libc_gpu_build)
66 endif()
68 include(LLVMLibCCheckMPFR)
70 if(LLVM_LIBC_CLANG_TIDY)
71   set(LLVM_LIBC_ENABLE_LINTING ON)
72 endif()
74 if(LLVM_LIBC_ENABLE_LINTING)
75   if(NOT CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
76     set(LLVM_LIBC_ENABLE_LINTING OFF)
77     message(WARNING "C++ compiler is not clang++, linting with be disabled.")
78   else()
79     if (NOT LLVM_LIBC_CLANG_TIDY)
80       find_program(LLVM_LIBC_CLANG_TIDY NAMES clang-tidy)
81     endif()
83     if(LLVM_LIBC_CLANG_TIDY)
84       # Check clang-tidy major version.
85       execute_process(COMMAND ${LLVM_LIBC_CLANG_TIDY} "--version"
86                       OUTPUT_VARIABLE CLANG_TIDY_OUTPUT)
87       string(REGEX MATCH "[0-9]+" CLANG_TIDY_VERSION "${CLANG_TIDY_OUTPUT}")
88       string(REGEX MATCH "[0-9]+" CLANG_MAJOR_VERSION
89              "${CMAKE_CXX_COMPILER_VERSION}")
90       if(NOT CLANG_TIDY_VERSION EQUAL CLANG_MAJOR_VERSION)
91         set(LLVM_LIBC_ENABLE_LINTING OFF)
92         message(WARNING "
93           'clang-tidy' (version ${CLANG_TIDY_VERSION}) is not the same as
94           'clang' (version ${CLANG_MAJOR_VERSION}).  Linting will
95           be disabled.
97           The path to the clang-tidy binary can be set manually by passing
98           -DLLVM_LIBC_CLANG_TIDY=<path/to/clang-tidy> to CMake.")
99       endif()
100     else()
101       message(FATAL_ERROR "
102         Linting is enabled but 'clang-tidy' is not found!
104         The path to the clang-tidy binary can be set manually by passing
105         -DLLVM_LIBC_CLANG_TIDY=<path/to/clang-tidy> to CMake.
107         To disable linting set LLVM_LIBC_ENABLE_LINTING to OFF
108         (pass -DLLVM_LIBC_ENABLE_LINTING=OFF to cmake).")
109     endif()
110   endif()
111 endif()
113 option(LLVM_LIBC_INCLUDE_SCUDO "Include the SCUDO standalone as the allocator for LLVM libc" OFF)
114 if(LLVM_LIBC_INCLUDE_SCUDO)
115   if (NOT "compiler-rt" IN_LIST LLVM_ENABLE_PROJECTS)
116     message(FATAL_ERROR "SCUDO cannot be included without adding compiler-rt to LLVM_ENABLE_PROJECTS")
117   endif()
118 endif()
120 option(LIBC_INCLUDE_DOCS "Build the libc documentation." ${LLVM_INCLUDE_DOCS})
122 include(CMakeParseArguments)
123 include(LLVMLibCCheckCpuFeatures)
124 include(LLVMLibCRules)
126 if(EXISTS "${LIBC_SOURCE_DIR}/config/${LIBC_TARGET_OS}/${LIBC_TARGET_ARCHITECTURE}/entrypoints.txt")
127   set(entrypoint_file "${LIBC_SOURCE_DIR}/config/${LIBC_TARGET_OS}/${LIBC_TARGET_ARCHITECTURE}/entrypoints.txt")
128 elseif(EXISTS "${LIBC_SOURCE_DIR}/config/${LIBC_TARGET_OS}/entrypoints.txt")
129   set(entrypoint_file "${LIBC_SOURCE_DIR}/config/${LIBC_TARGET_OS}/entrypoints.txt")
130 else()
131   message(FATAL_ERROR "entrypoints.txt file for the target platform '${LIBC_TARGET_OS}/${LIBC_TARGET_ARCHITECTURE}' not found.")
132 endif()
133 include(${entrypoint_file})
135 if(EXISTS "${LIBC_SOURCE_DIR}/config/${LIBC_TARGET_OS}/${LIBC_TARGET_ARCHITECTURE}/headers.txt")
136   include("${LIBC_SOURCE_DIR}/config/${LIBC_TARGET_OS}/${LIBC_TARGET_ARCHITECTURE}/headers.txt")
137 elseif(EXISTS "${LIBC_SOURCE_DIR}/config/${LIBC_TARGET_OS}/headers.txt")
138   include("${LIBC_SOURCE_DIR}/config/${LIBC_TARGET_OS}/headers.txt")
139 endif()
141 set(TARGET_ENTRYPOINT_NAME_LIST "")
142 foreach(entrypoint IN LISTS TARGET_LLVMLIBC_ENTRYPOINTS)
143   string(FIND ${entrypoint} "." last_dot_loc REVERSE)
144   if(${last_dot_loc} EQUAL -1)
145     message(FATAL "Invalid entrypoint target name ${entrypoint}; Expected a '.' "
146                   "(dot) in the name.")
147   endif()
148   math(EXPR name_loc "${last_dot_loc} + 1")
149   string(SUBSTRING ${entrypoint} ${name_loc} -1 entrypoint_name)
150   list(APPEND TARGET_ENTRYPOINT_NAME_LIST ${entrypoint_name})
151 endforeach()
153 if(LLVM_LIBC_FULL_BUILD)
154   # We need to set up hdrgen first since other targets depend on it.
155   add_subdirectory(utils/LibcTableGenUtil)
156   add_subdirectory(utils/HdrGen)
157 endif()
159 set(LIBC_TARGET)
160 set(LIBC_COMPONENT)
161 set(LIBC_INSTALL_DEPENDS)
162 set(LIBC_INSTALL_TARGET)
163 if(LLVM_LIBC_FULL_BUILD)
164   set(LIBC_TARGET libc)
165   set(LIBC_COMPONENT libc)
166   set(LIBC_INSTALL_DEPENDS "libc;install-libc-headers;libc-startup")
167   set(LIBC_INSTALL_TARGET install-libc)
168   if(LIBC_TARGET_ARCHITECTURE_IS_GPU)
169     set(LIBC_ARCHIVE_NAME cgpu)
170   else()
171     set(LIBC_ARCHIVE_NAME c)
172   endif()
173 else()
174   set(LIBC_TARGET llvmlibc)
175   set(LIBC_COMPONENT llvmlibc)
176   set(LIBC_INSTALL_DEPENDS llvmlibc)
177   set(LIBC_INSTALL_TARGET install-llvmlibc)
178   set(LIBC_ARCHIVE_NAME llvmlibc)
179 endif()
181 add_subdirectory(include)
182 add_subdirectory(config)
183 add_subdirectory(src)
184 add_subdirectory(utils)
186 if(LLVM_LIBC_FULL_BUILD)
187   # The startup system can potentially depend on the library components so add
188   # it after the library implementation directories.
189   add_subdirectory(startup)
190 endif()
192 # The lib and test directories are added at the very end as tests
193 # and libraries potentially draw from the components present in all
194 # of the other directories.
195 # TODO: Add testing support for the libc GPU target.
196 add_subdirectory(lib)
197 if(LLVM_INCLUDE_TESTS AND NOT LIBC_TARGET_ARCHITECTURE_IS_GPU)
198   add_subdirectory(test)
199   add_subdirectory(fuzzing)
200 endif()
202 if(LIBC_INCLUDE_BENCHMARKS)
203   add_subdirectory(benchmarks)
204 endif()
206 if (LIBC_INCLUDE_DOCS)
207   add_subdirectory(docs)
208 endif()
211 if(LLVM_LIBC_FULL_BUILD)
212   add_llvm_install_targets(
213     install-libc-headers
214     DEPENDS libc-headers
215     COMPONENT libc-headers
216   )
217 endif()
219 add_llvm_install_targets(
220   ${LIBC_INSTALL_TARGET}
221   DEPENDS ${LIBC_INSTALL_DEPENDS}
222   COMPONENT ${LIBC_COMPONENT}