1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
|
# This source file is part of the Swift.org open source project
#
# Copyright (c) 2014 - 2021 Apple Inc. and the Swift project authors
# Licensed under Apache License v2.0 with Runtime Library Exception
#
# See http://swift.org/LICENSE.txt for license information
# See http://swift.org/CONTRIBUTORS.txt for Swift project authors
# Following function are needed as a workaround until it's possible to compile
# swift code with cmake's builtin swift support.
# Add a swift compiler module
#
# Creates a target to compile a swift module.
# Adds the module name to the global property "swift_compiler_modules".
#
function(add_swift_compiler_module module)
cmake_parse_arguments(ALSM
""
""
"DEPENDS;SOURCES"
${ARGN})
set(raw_sources ${ALSM_SOURCES} ${ALSM_UNPARSED_ARGUMENTS})
set(target_name "SwiftModule${module}")
# Add a target which depends on the actual compilation target, which
# will be created in add_swift_compiler_modules_library.
# This target is mainly used to add properties, like the list of source files.
add_custom_target(
${target_name}
COMMENT "swift compiler module ${module}")
swift_compiler_sources(${module} ${raw_sources})
set_property(TARGET ${target_name} PROPERTY module_name ${module})
set_property(TARGET ${target_name} PROPERTY module_depends ${ALSM_DEPENDS})
get_property(modules GLOBAL PROPERTY swift_compiler_modules)
set_property(GLOBAL PROPERTY swift_compiler_modules ${modules} ${module})
endfunction()
# Add source files to a swift compiler module.
#
function(swift_compiler_sources module)
cmake_parse_arguments(LSS
""
""
""
${ARGN})
set(raw_sources ${LSS_UNPARSED_ARGUMENTS})
set(sources)
foreach(raw_source ${raw_sources})
get_filename_component(
raw_source "${raw_source}" REALPATH BASE_DIR "${CMAKE_CURRENT_SOURCE_DIR}")
list(APPEND sources "${raw_source}")
endforeach()
set(target_name "SwiftModule${module}")
set_property(TARGET "SwiftModule${module}" APPEND PROPERTY SOURCES ${sources})
endfunction()
# Allow the override of the flags used to define the SDK used to compile the
# Swift compiler sources from the CMake configuration (command line or cache
# files). This allows supporting complicated sysroots and some cross-compilation
# scenarios.
set(SWIFT_COMPILER_SOURCES_SDK_FLAGS_default)
if(SWIFT_HOST_VARIANT_SDK IN_LIST SWIFT_DARWIN_PLATFORMS)
set(sdk_path "${SWIFT_SDK_${SWIFT_HOST_VARIANT_SDK}_ARCH_${SWIFT_HOST_VARIANT_ARCH}_PATH}")
list(APPEND SWIFT_COMPILER_SOURCES_SDK_FLAGS_default "-sdk" "${sdk_path}")
if(NOT EXISTS "${sdk_path}/usr/include/c++")
# Darwin SDKs in Xcode 12 or older do not include libc++, which prevents clang from finding libc++ when invoked
# from ClangImporter. This results in build errors. To workaround this, let's explicitly pass the path to libc++
# to clang.
message(WARNING "Building with an outdated Darwin SDK: libc++ missing from the ${SWIFT_HOST_VARIANT_SDK} SDK. Will use libc++ from the toolchain.")
get_filename_component(absolute_libcxx_path "${CMAKE_C_COMPILER}/../../include/c++/v1" REALPATH)
if (EXISTS "${absolute_libcxx_path}")
list(APPEND SWIFT_COMPILER_SOURCES_SDK_FLAGS_default "-Xcc" "-isystem" "-Xcc" "${absolute_libcxx_path}")
else()
message(ERROR "libc++ not found in the toolchain.")
endif()
endif()
elseif(BOOTSTRAPPING_MODE STREQUAL "CROSSCOMPILE")
list(APPEND SWIFT_COMPILER_SOURCES_SDK_FLAGS_default "-sdk" "${SWIFT_SDK_${SWIFT_HOST_VARIANT_SDK}_ARCH_${SWIFT_HOST_VARIANT_ARCH}_PATH}")
endif()
set(SWIFT_COMPILER_SOURCES_SDK_FLAGS ${SWIFT_COMPILER_SOURCES_SDK_FLAGS_default}
CACHE STRING "Swift flags used to compiler the Swift compiler sources")
# Add a library target for the swift compiler modules.
#
# Adds targets to compile all swift compiler modules and a target for the
# library itself.
#
function(add_swift_compiler_modules_library name)
cmake_parse_arguments(ALS
""
"BOOTSTRAPPING;SWIFT_EXEC"
"DEPENDS"
${ARGN})
set(swift_compile_options
"-color-diagnostics"
"-Xfrontend" "-validate-tbd-against-ir=none"
"${cxx_interop_flag}"
"-Xfrontend" "-disable-target-os-checking"
"-Xcc" "-std=c++17"
"-Xcc" "-DCOMPILED_WITH_SWIFT" "-Xcc" "-DSWIFT_TARGET"
"-Xcc" "-UIBOutlet" "-Xcc" "-UIBAction" "-Xcc" "-UIBInspectable")
# Prior to 5.9, we have to use the experimental flag for C++ interop.
if (CMAKE_Swift_COMPILER_VERSION VERSION_LESS 5.9)
list(APPEND swift_compile_options "-Xfrontend" "-enable-experimental-cxx-interop")
else()
list(APPEND swift_compile_options "-cxx-interoperability-mode=default")
endif()
if (NOT BOOTSTRAPPING_MODE STREQUAL "HOSTTOOLS")
if(SWIFT_MIN_RUNTIME_VERSION)
list(APPEND swift_compile_options
"-Xfrontend" "-min-runtime-version"
"-Xfrontend" "${SWIFT_MIN_RUNTIME_VERSION}")
endif()
list(APPEND swift_compile_options "-Xfrontend" "-disable-implicit-string-processing-module-import")
# We cannot use Unsafe*Pointer when importing C++ move-only types until the
# host libraries are updated to Swift 6.0, because that importing strategy
# requires _Pointer have its Pointee: ~Copyable. (rdar://128013193)
list(APPEND swift_compile_options "-Xfrontend" "-cxx-interop-use-opaque-pointer-for-moveonly")
endif()
if(CMAKE_BUILD_TYPE STREQUAL "Debug")
list(APPEND swift_compile_options "-g")
else()
list(APPEND swift_compile_options "-O" "-cross-module-optimization")
endif()
if(LLVM_ENABLE_ASSERTIONS)
list(APPEND swift_compile_options "-Xcc" "-UNDEBUG")
else()
list(APPEND swift_compile_options "-Xcc" "-DNDEBUG")
endif()
if("${BRIDGING_MODE}" STREQUAL "PURE")
list(APPEND swift_compile_options "-Xcc" "-DPURE_BRIDGING_MODE")
endif()
if(NOT SWIFT_STDLIB_SUPPORT_BACK_DEPLOYMENT)
list(APPEND swift_compile_options "-Xfrontend" "-disable-legacy-type-info")
endif()
get_bootstrapping_path(build_dir ${CMAKE_CURRENT_BINARY_DIR} "${ALS_BOOTSTRAPPING}")
set(sdk_option ${SWIFT_COMPILER_SOURCES_SDK_FLAGS})
if(SWIFT_HOST_VARIANT_SDK IN_LIST SWIFT_DARWIN_PLATFORMS)
set(deployment_version "${SWIFT_SDK_${SWIFT_HOST_VARIANT_SDK}_DEPLOYMENT_VERSION}")
if(BOOTSTRAPPING_MODE STREQUAL "CROSSCOMPILE-WITH-HOSTLIBS")
# Let the cross-compiled compile don't pick up the compiled stdlib by providing
# an (almost) empty resource dir.
# The compiler will instead pick up the stdlib from the SDK.
get_filename_component(swift_exec_bin_dir ${ALS_SWIFT_EXEC} DIRECTORY)
list(APPEND sdk_option "-resource-dir" "${swift_exec_bin_dir}/../bootstrapping0/lib/swift")
endif()
elseif(BOOTSTRAPPING_MODE STREQUAL "CROSSCOMPILE")
# NOTE: prepending allows SWIFT_COMPILER_SOURCES_SDK_FLAGS to override the
# resource directory if needed.
list(PREPEND sdk_option "-resource-dir" "${SWIFTLIB_DIR}")
endif()
get_versioned_target_triple(target ${SWIFT_HOST_VARIANT_SDK}
${SWIFT_HOST_VARIANT_ARCH} "${deployment_version}")
# Let Swift discover SwiftShims headers which are included by some headers
# under `include/swift`. These are either located next to the compiler (in case of open source toolchains) or
# in the SDK (in case a Swift compiler from Xcode)
get_filename_component(swift_exec_bin_dir ${ALS_SWIFT_EXEC} DIRECTORY)
list(APPEND sdk_option "-I" "${swift_exec_bin_dir}/../lib" "-I" "${sdk_path}/usr/lib")
set(all_obj_files)
set(all_module_targets)
set(all_module_files)
get_property(modules GLOBAL PROPERTY "swift_compiler_modules")
foreach(module ${modules})
set(module_target "SwiftModule${module}")
get_target_property(module ${module_target} "module_name")
get_target_property(sources ${module_target} SOURCES)
get_target_property(dependencies ${module_target} "module_depends")
set(deps, "")
if (dependencies)
foreach(dep_module ${dependencies})
if (DEFINED "${dep_module}_dep_target")
# We have to add the module target for the ordering dependency
# and the output file for the file dependency (otherwise the dependent
# module wouldn't be rebuilt if the current module changes)
list(APPEND deps "${${dep_module}_dep_target}" "${build_dir}/${dep_module}.o")
else()
message(FATAL_ERROR "module dependency ${module} -> ${dep_module} not found. Make sure to add modules in dependency order")
endif()
endforeach()
endif()
set(module_obj_file "${build_dir}/${module}.o")
set(module_file "${build_dir}/${module}.swiftmodule")
list(APPEND all_module_files ${module_file})
set(all_obj_files ${all_obj_files} ${module_obj_file})
set(c_include_paths
# LLVM modules and headers.
"${LLVM_MAIN_INCLUDE_DIR}"
# Generated LLVM headers.
"${LLVM_INCLUDE_DIR}"
# Clang modules and headers.
${CLANG_INCLUDE_DIRS}
# Bridging modules and headers.
"${SWIFT_MAIN_INCLUDE_DIR}"
# Generated C headers.
"${CMAKE_CURRENT_BINARY_DIR}/../include")
set(c_include_paths_args)
foreach(c_include_path ${c_include_paths})
list(APPEND c_include_paths_args "-Xcc" "-I" "-Xcc" "${c_include_path}")
endforeach()
# Compile the module into an object file
add_custom_command_target(dep_target
COMMAND ${ALS_SWIFT_EXEC} "-c" "-o" ${module_obj_file}
${sdk_option}
"-target" ${target}
"-module-name" ${module} "-emit-module"
"-emit-module-path" "${build_dir}/${module}.swiftmodule"
"-parse-as-library" ${sources}
"-wmo" ${swift_compile_options}
${c_include_paths_args}
# Generated swift modules.
"-I" "${build_dir}"
OUTPUT ${module_obj_file}
WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
DEPENDS ${sources} ${deps} ${ALS_DEPENDS}
importedHeaderDependencies
COMMENT "Building swift module ${module}")
if(BOOTSTRAPPING_MODE STREQUAL "CROSSCOMPILE")
add_dependencies(${dep_target} swift-stdlib-${SWIFT_SDK_${SWIFT_HOST_VARIANT_SDK}_LIB_SUBDIR}-${SWIFT_HOST_VARIANT_ARCH})
endif()
set("${module}_dep_target" ${dep_target})
set(all_module_targets ${all_module_targets} ${dep_target})
endforeach()
# Create a static library containing all module object files.
if (XCODE)
# Xcode does not compile libraries that contain only object files.
# Therefore, it fails to create the static library. As a workaround,
# we add an empty source file force_lib.c to the target.
set(all_obj_files force_lib.c ${all_obj_files})
endif()
add_library(${name} STATIC ${all_obj_files})
add_dependencies(${name} ${all_module_targets})
set_target_properties(${name} PROPERTIES LINKER_LANGUAGE CXX)
# Downstream linking should include the swiftmodule in debug builds to allow lldb to
# work correctly. Only do this on Darwin since neither gold (currently used by default
# on Linux), nor the default Windows linker 'link' support '-add_ast_path'.
is_build_type_with_debuginfo("${CMAKE_BUILD_TYPE}" debuginfo)
if(debuginfo AND SWIFT_HOST_VARIANT_SDK IN_LIST SWIFT_DARWIN_PLATFORMS)
set(public_link_flags)
foreach(module_file ${all_module_files})
list(APPEND public_link_flags "SHELL:-Xlinker -add_ast_path -Xlinker ${module_file}")
endforeach()
target_link_options(${name} PUBLIC ${public_link_flags})
endif()
set_property(GLOBAL APPEND PROPERTY SWIFT_BUILDTREE_EXPORTS ${name})
endfunction()
# A dummy library if swift in the compiler is disabled
add_swift_host_library(swiftCompilerStub OBJECT stubs.cpp)
if (NOT BOOTSTRAPPING_MODE)
add_library(swiftCompilerModules ALIAS swiftCompilerStub)
else()
# Note: "Swift" is not added intentionally here, because it would break
# the bootstrapping build in case no swift toolchain is installed on the host.
project(SwiftInTheCompiler LANGUAGES C CXX)
add_subdirectory(Sources)
if(BOOTSTRAPPING_MODE MATCHES "HOSTTOOLS|CROSSCOMPILE")
if (NOT SWIFT_EXEC_FOR_SWIFT_MODULES)
message(FATAL_ERROR "Need a swift toolchain building swift compiler sources")
endif()
if(BOOTSTRAPPING_MODE STREQUAL "HOSTTOOLS")
if(NOT SWIFT_EXEC_FOR_SWIFT_MODULES STREQUAL CMAKE_Swift_COMPILER)
message(FATAL_ERROR "The Swift compiler (${CMAKE_Swift_COMPILER}) differs from the Swift compiler in SWIFT_NATIVE_SWIFT_TOOLS_PATH (${SWIFT_NATIVE_SWIFT_TOOLS_PATH}/swiftc).")
endif()
set(min_supported_swift_version 5.8)
if(CMAKE_Swift_COMPILER_VERSION VERSION_LESS "${min_supported_swift_version}")
message(FATAL_ERROR
"Outdated Swift compiler: building with host tools requires Swift ${min_supported_swift_version} or newer. "
"Please update your Swift toolchain or switch BOOTSTRAPPING_MODE to BOOTSTRAPPING(-WITH-HOSTLIBS)? or OFF.")
endif()
endif()
add_swift_compiler_modules_library(swiftCompilerModules
SWIFT_EXEC "${SWIFT_EXEC_FOR_SWIFT_MODULES}")
elseif(BOOTSTRAPPING_MODE MATCHES "BOOTSTRAPPING.*")
set(b0_deps swift-frontend-bootstrapping0 symlink-headers-bootstrapping0 copy-legacy-layouts)
set(b1_deps swift-frontend-bootstrapping1 symlink-headers-bootstrapping1)
if(BOOTSTRAPPING_MODE STREQUAL "BOOTSTRAPPING")
list(APPEND b0_deps swiftCore-bootstrapping0)
list(APPEND b1_deps swiftCore-bootstrapping1)
if(CMAKE_BUILD_TYPE STREQUAL "Debug")
list(APPEND b0_deps swiftSwiftOnoneSupport-bootstrapping0)
list(APPEND b1_deps swiftSwiftOnoneSupport-bootstrapping1)
endif()
if(SWIFT_HOST_VARIANT_SDK IN_LIST SWIFT_DARWIN_PLATFORMS)
list(APPEND b0_deps swiftDarwin-bootstrapping0)
list(APPEND b1_deps swiftDarwin-bootstrapping1)
endif()
if(SWIFT_HOST_VARIANT_SDK IN_LIST SWIFT_LIBSTDCXX_PLATFORMS)
list(APPEND b0_deps copy-libstdcxx-modulemap-bootstrapping0 copy-libstdcxx-header-bootstrapping0)
list(APPEND b1_deps copy-libstdcxx-modulemap-bootstrapping1 copy-libstdcxx-header-bootstrapping1)
endif()
endif()
if(SWIFT_HOST_VARIANT_SDK IN_LIST SWIFT_DARWIN_PLATFORMS AND SWIFT_STDLIB_SUPPORT_BACK_DEPLOYMENT)
# We cannot specify directly HostCompatibilityLibs
# because ultimately is used to specify a dependency for a
# custom target and, unlike `target_link_libraries`, such dependency
# would be lost at the generation of the build system.
get_property(compatibility_libs
TARGET HostCompatibilityLibs
PROPERTY INTERFACE_LINK_LIBRARIES)
list(APPEND b0_deps ${compatibility_libs})
list(APPEND b1_deps ${compatibility_libs})
endif()
# Bootstrapping - stage 1, using the compiler from level 0
add_swift_compiler_modules_library(swiftCompilerModules-bootstrapping1
SWIFT_EXEC $<TARGET_FILE_DIR:swift-frontend-bootstrapping0>/swiftc${CMAKE_EXECUTABLE_SUFFIX}
DEPENDS ${b0_deps}
BOOTSTRAPPING 1)
# The final build, using the compiler from stage 1
add_swift_compiler_modules_library(swiftCompilerModules
SWIFT_EXEC $<TARGET_FILE_DIR:swift-frontend-bootstrapping1>/swiftc${CMAKE_EXECUTABLE_SUFFIX}
DEPENDS ${b1_deps})
if(BOOTSTRAPPING_MODE STREQUAL "BOOTSTRAPPING-WITH-HOSTLIBS")
file(GLOB module_dirs "${CMAKE_BINARY_DIR}/bootstrapping*/lib/swift/macosx/*.swiftmodule")
foreach(module_dir ${module_dirs})
message(WARNING "${module_dir} found from a previous 'bootstrapping' build: removing")
file(REMOVE_RECURSE "${module_dir}")
endforeach()
endif()
else()
message(FATAL_ERROR "Unknown BOOTSTRAPPING_MODE '${BOOTSTRAPPING_MODE}'")
endif()
endif()
|
