1# Check if lld is built as a standalone project.
2if(CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
3  project(lld)
4  cmake_minimum_required(VERSION 3.13.4)
5
6  set(CMAKE_INCLUDE_CURRENT_DIR ON)
7  set(LLD_BUILT_STANDALONE TRUE)
8
9  find_program(LLVM_CONFIG_PATH "llvm-config" DOC "Path to llvm-config binary")
10  if(NOT LLVM_CONFIG_PATH)
11    message(FATAL_ERROR "llvm-config not found: specify LLVM_CONFIG_PATH")
12  endif()
13
14  execute_process(COMMAND "${LLVM_CONFIG_PATH}"
15                          "--obj-root"
16                          "--includedir"
17                          "--cmakedir"
18                          "--src-root"
19                  RESULT_VARIABLE HAD_ERROR
20                  OUTPUT_VARIABLE LLVM_CONFIG_OUTPUT
21                  OUTPUT_STRIP_TRAILING_WHITESPACE)
22  if(HAD_ERROR)
23    message(FATAL_ERROR "llvm-config failed with status ${HAD_ERROR}")
24  endif()
25
26  string(REGEX REPLACE "[ \t]*[\r\n]+[ \t]*" ";" LLVM_CONFIG_OUTPUT "${LLVM_CONFIG_OUTPUT}")
27
28  list(GET LLVM_CONFIG_OUTPUT 0 OBJ_ROOT)
29  list(GET LLVM_CONFIG_OUTPUT 1 MAIN_INCLUDE_DIR)
30  list(GET LLVM_CONFIG_OUTPUT 2 LLVM_CMAKE_PATH)
31  list(GET LLVM_CONFIG_OUTPUT 3 MAIN_SRC_DIR)
32
33  set(LLVM_OBJ_ROOT ${OBJ_ROOT} CACHE PATH "path to LLVM build tree")
34  set(LLVM_MAIN_INCLUDE_DIR ${MAIN_INCLUDE_DIR} CACHE PATH "path to llvm/include")
35  set(LLVM_MAIN_SRC_DIR ${MAIN_SRC_DIR} CACHE PATH "Path to LLVM source tree")
36
37  file(TO_CMAKE_PATH ${LLVM_OBJ_ROOT} LLVM_BINARY_DIR)
38
39  if(NOT EXISTS "${LLVM_CMAKE_PATH}/LLVMConfig.cmake")
40    message(FATAL_ERROR "LLVMConfig.cmake not found")
41  endif()
42  include("${LLVM_CMAKE_PATH}/LLVMConfig.cmake")
43
44  list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_PATH}")
45
46  set(PACKAGE_VERSION "${LLVM_PACKAGE_VERSION}")
47  include_directories("${LLVM_BINARY_DIR}/include" ${LLVM_INCLUDE_DIRS})
48  link_directories(${LLVM_LIBRARY_DIRS})
49
50  set(LLVM_LIBRARY_OUTPUT_INTDIR ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/lib${LLVM_LIBDIR_SUFFIX})
51  set(LLVM_RUNTIME_OUTPUT_INTDIR ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/bin)
52  find_program(LLVM_TABLEGEN_EXE "llvm-tblgen" ${LLVM_TOOLS_BINARY_DIR} NO_DEFAULT_PATH)
53
54  include(AddLLVM)
55  include(TableGen)
56  include(HandleLLVMOptions)
57  include(CheckAtomic)
58
59  if(LLVM_INCLUDE_TESTS)
60    find_package(Python3 COMPONENTS Interpreter)
61    if(NOT Python3_Interpreter_FOUND)
62      message(WARNING "Python3 not found, using python2 as a fallback")
63      find_package(Python2 COMPONENTS Interpreter REQUIRED)
64      if(Python2_VERSION VERSION_LESS 2.7)
65        message(SEND_ERROR "Python 2.7 or newer is required")
66      endif()
67
68      # Treat python2 as python3
69      add_executable(Python3::Interpreter IMPORTED)
70      set_target_properties(Python3::Interpreter PROPERTIES
71        IMPORTED_LOCATION ${Python2_EXECUTABLE})
72      set(Python3_EXECUTABLE ${Python2_EXECUTABLE})
73    endif()
74
75    # Check prebuilt llvm/utils.
76    if(EXISTS ${LLVM_TOOLS_BINARY_DIR}/FileCheck${CMAKE_EXECUTABLE_SUFFIX}
77        AND EXISTS ${LLVM_TOOLS_BINARY_DIR}/not${CMAKE_EXECUTABLE_SUFFIX})
78      set(LLVM_UTILS_PROVIDED ON)
79    endif()
80
81    if(EXISTS ${LLVM_MAIN_SRC_DIR}/utils/lit/lit.py)
82      # Note: path not really used, except for checking if lit was found
83      set(LLVM_LIT ${LLVM_MAIN_SRC_DIR}/utils/lit/lit.py)
84      if(NOT LLVM_UTILS_PROVIDED)
85        add_subdirectory(${LLVM_MAIN_SRC_DIR}/utils/FileCheck utils/FileCheck)
86        add_subdirectory(${LLVM_MAIN_SRC_DIR}/utils/not utils/not)
87        set(LLVM_UTILS_PROVIDED ON)
88        set(LLD_TEST_DEPS FileCheck not)
89      endif()
90      set(UNITTEST_DIR ${LLVM_MAIN_SRC_DIR}/utils/unittest)
91      if(EXISTS ${UNITTEST_DIR}/googletest/include/gtest/gtest.h
92          AND NOT EXISTS ${LLVM_LIBRARY_DIR}/${CMAKE_STATIC_LIBRARY_PREFIX}gtest${CMAKE_STATIC_LIBRARY_SUFFIX}
93          AND EXISTS ${UNITTEST_DIR}/CMakeLists.txt)
94        add_subdirectory(${UNITTEST_DIR} utils/unittest)
95      endif()
96    else()
97      # Seek installed Lit.
98      find_program(LLVM_LIT
99                   NAMES llvm-lit lit.py lit
100                   PATHS "${LLVM_MAIN_SRC_DIR}/utils/lit"
101                   DOC "Path to lit.py")
102    endif()
103
104    if(LLVM_LIT)
105      # Define the default arguments to use with 'lit', and an option for the user
106      # to override.
107      set(LIT_ARGS_DEFAULT "-sv")
108      if (MSVC OR XCODE)
109        set(LIT_ARGS_DEFAULT "${LIT_ARGS_DEFAULT} --no-progress-bar")
110      endif()
111      set(LLVM_LIT_ARGS "${LIT_ARGS_DEFAULT}" CACHE STRING "Default options for lit")
112
113      # On Win32 hosts, provide an option to specify the path to the GnuWin32 tools.
114      if(WIN32 AND NOT CYGWIN)
115        set(LLVM_LIT_TOOLS_DIR "" CACHE PATH "Path to GnuWin32 tools")
116      endif()
117    else()
118      set(LLVM_INCLUDE_TESTS OFF)
119    endif()
120  endif()
121endif()
122
123set(LLD_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
124set(LLD_INCLUDE_DIR ${LLD_SOURCE_DIR}/include )
125set(LLD_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR})
126
127set(LLD_VENDOR ${PACKAGE_VENDOR} CACHE STRING
128  "Vendor-specific text for showing with version information.")
129
130if(LLD_VENDOR)
131  add_definitions(-DLLD_VENDOR="${LLD_VENDOR}")
132endif()
133
134# Compute the LLD version from the LLVM version.
135string(REGEX MATCH "[0-9]+\\.[0-9]+(\\.[0-9]+)?" LLD_VERSION
136  ${PACKAGE_VERSION})
137message(STATUS "LLD version: ${LLD_VERSION}")
138
139string(REGEX REPLACE "([0-9]+)\\.[0-9]+(\\.[0-9]+)?" "\\1" LLD_VERSION_MAJOR
140  ${LLD_VERSION})
141string(REGEX REPLACE "[0-9]+\\.([0-9]+)(\\.[0-9]+)?" "\\1" LLD_VERSION_MINOR
142  ${LLD_VERSION})
143
144# Configure the Version.inc file.
145configure_file(
146  ${CMAKE_CURRENT_SOURCE_DIR}/include/lld/Common/Version.inc.in
147  ${CMAKE_CURRENT_BINARY_DIR}/include/lld/Common/Version.inc)
148
149
150if (CMAKE_SOURCE_DIR STREQUAL CMAKE_BINARY_DIR)
151  message(FATAL_ERROR "In-source builds are not allowed. CMake would overwrite "
152"the makefiles distributed with LLVM. Please create a directory and run cmake "
153"from there, passing the path to this source directory as the last argument. "
154"This process created the file `CMakeCache.txt' and the directory "
155"`CMakeFiles'. Please delete them.")
156endif()
157
158list (APPEND CMAKE_MODULE_PATH "${LLD_SOURCE_DIR}/cmake/modules")
159
160include(AddLLD)
161
162option(LLD_USE_VTUNE
163       "Enable VTune user task tracking."
164       OFF)
165if (LLD_USE_VTUNE)
166  find_package(VTune)
167  if (VTUNE_FOUND)
168    include_directories(${VTune_INCLUDE_DIRS})
169    list(APPEND LLVM_COMMON_LIBS ${VTune_LIBRARIES})
170    add_definitions(-DLLD_HAS_VTUNE)
171  endif()
172endif()
173
174option(LLD_BUILD_TOOLS
175  "Build the lld tools. If OFF, just generate build targets." ON)
176
177option(LLD_DEFAULT_LD_LLD_IS_MINGW
178    "Use MinGW as the default backend for ld.lld. If OFF, ELF will be used." OFF)
179if (LLD_DEFAULT_LD_LLD_IS_MINGW)
180  add_definitions("-DLLD_DEFAULT_LD_LLD_IS_MINGW=1")
181endif()
182
183if (MSVC)
184  add_definitions(-wd4530) # Suppress 'warning C4530: C++ exception handler used, but unwind semantics are not enabled.'
185  add_definitions(-wd4062) # Suppress 'warning C4062: enumerator X in switch of enum Y is not handled' from system header.
186endif()
187
188include_directories(BEFORE
189  ${CMAKE_CURRENT_BINARY_DIR}/include
190  ${CMAKE_CURRENT_SOURCE_DIR}/include
191  )
192
193if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
194  install(DIRECTORY include/
195    DESTINATION include
196    FILES_MATCHING
197    PATTERN "*.h"
198    )
199endif()
200
201add_subdirectory(Common)
202add_subdirectory(lib)
203add_subdirectory(tools/lld)
204
205if (LLVM_INCLUDE_TESTS)
206  add_subdirectory(test)
207  add_subdirectory(unittests)
208endif()
209
210add_subdirectory(docs)
211add_subdirectory(COFF)
212add_subdirectory(ELF)
213add_subdirectory(MachO)
214add_subdirectory(MinGW)
215add_subdirectory(wasm)
216
217add_subdirectory(cmake/modules)
218