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build: restructure the installation location
Clean up some of the module property handling to be more declarative. This reduces the operations that are being done on targets in favour of defaults. Adopt the latest best practices for handling module installation. Introduce the new `SwiftTesting_INSTALL_NESTED_SUBDIR` option to allow installation into platform/architecture subdirectory allowing multi-architecture installations for platforms like Windows and Android. This is currently opt-in and requires a newer toolchain (something within the last ~2w) to detect the defaults. The values can be overridden by the user if desired.
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+65
-77
lines changed

3 files changed

+65
-77
lines changed

‎CMakeLists.txt

+11-8
Original file line numberDiff line numberDiff line change
@@ -32,18 +32,21 @@ set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
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set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
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set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
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35+
set(CMAKE_INSTALL_RPATH $<IF:$<PLATFORM_ID:Darwin>,"@loader_path/..","$ORIGIN">)
36+
set(CMAKE_INSTALL_REMOVE_ENVIRONMENT_RPATH YES)
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3538
set(CMAKE_MSVC_RUNTIME_LIBRARY MultiThreadedDLL)
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set(CMAKE_CXX_STANDARD 20)
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set(CMAKE_Swift_LANGUAGE_VERSION 6)
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set(CMAKE_Swift_MODULE_DIRECTORY ${CMAKE_BINARY_DIR}/swift)
3942

40-
if(NOT SWIFT_SYSTEM_NAME)
41-
if(CMAKE_SYSTEM_NAME STREQUAL Darwin)
42-
set(SWIFT_SYSTEM_NAME macosx)
43-
else()
44-
set(SWIFT_SYSTEM_NAME "$<LOWER_CASE:${CMAKE_SYSTEM_NAME}>")
45-
endif()
46-
endif()
47-
43+
include(PlatformInfo)
4844
include(SwiftModuleInstallation)
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46+
option(SwiftTesting_INSTALL_NESTED_SUBDIR "Install libraries under a platform and architecture subdirectory" NO)
47+
set(SwiftTesting_INSTALL_LIBDIR "${CMAKE_INSTALL_LIBDIR}/swift$<$<NOT:$<BOOL:${BUILD_SHARED_LIBS}>>:_static>/${SwiftTesting_PLATFORM_SUBDIR}$<$<AND:$<PLATFORM_ID:Darwin>,$<NOT:$<BOOL:${SwiftTesting_INSTALL_NESTED_SUBDIR}>>>:/testing>$<$<BOOL:${SwiftTesting_INSTALL_NESTED_SUBDIR}>:/${SwiftTesting_ARCH_SUBDIR}>")
48+
set(SwiftTesting_INSTALL_SWIFTMODULEDIR "${CMAKE_INSTALL_LIBDIR}/swift$<$<NOT:$<BOOL:${BUILD_SHARED_LIBS}>>:_static>/${SwiftTesting_PLATFORM_SUBDIR}$<$<AND:$<PLATFORM_ID:Darwin>,$<NOT:$<BOOL:${SwiftTesting_INSTALL_NESTED_SUBDIR}>>>:/testing>$<$<BOOL:${SwiftTesting_INSTALL_NESTED_SUBDIR}>:/${SwiftTesting_PLATFORM_SUBDIR}>")
49+
50+
add_compile_options($<$<COMPILE_LANGUAGE:Swift>:-no-toolchain-stdlib-rpath>)
51+
4952
add_subdirectory(Sources)

‎cmake/modules/PlatformInfo.cmake

+48
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,48 @@
1+
# This source file is part of the Swift.org open source project
2+
#
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# Copyright (c) 2025 Apple Inc. and the Swift project authors
4+
# Licensed under Apache License v2.0 with Runtime Library Exception
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#
6+
# See http://swift.org/LICENSE.txt for license information
7+
# See http://swift.org/CONTRIBUTORS.txt for Swift project authors
8+
9+
set(print_target_info_invocation "${CMAKE_Swift_COMPILER}" -print-target-info)
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if(CMAKE_Swift_COMPILER_TARGET)
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list(APPEND print_target_info_invocation -target ${CMAKE_Swift_COMPILER_TARGET})
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endif()
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execute_process(COMMAND ${print_target_info_invocation} OUTPUT_VARIABLE target_info_json)
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message(CONFIGURE_LOG "Swift Target Info: ${print_target_info_invocation}\n"
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"${target_info_json}")
16+
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if(NOT SwiftTesting_MODULE_TRIPLE)
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string(JSON module_triple GET "${target_info_json}" "target" "moduleTriple")
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set(SwiftTesting_MODULE_TRIPLE "${module_triple}" CACHE STRING "Triple used for installed swift{doc,module,interface} files")
20+
mark_as_advanced(SwiftTesting_MODULE_TRIPLE)
21+
22+
message(CONFIGURE_LOG "Swift Module Triple: ${module_triple}")
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endif()
24+
25+
if(NOT SwiftTesting_PLATFORM_SUBDIR)
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string(JSON platform GET "${target_info_json}" "target" "platform")
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if(NOT platform)
28+
if(NOT SWIFT_SYSTEM_NAME)
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if(CMAKE_SYSTEM_NAME STREQUAL Darwin)
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set(platform macosx)
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else()
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set(platform $<LOWER_CASE:${CMAKE_SYSTEM_NAME}>)
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endif()
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endif()
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endif()
36+
set(SwiftTesting_PLATFORM_SUBDIR "${platform}" CACHE STRING "Platform name used for installed swift{doc,module,interface} files")
37+
mark_as_advanced(SwiftTesting_PLATFORM_SUBDIR)
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39+
message(CONFIGURE_LOG "Swift Platform: ${platform}")
40+
endif()
41+
42+
if(NOT SwiftTesting_ARCH_SUBDIR)
43+
string(JSON arch GET "${target_info_json}" "target" "arch")
44+
set(SwiftTesting_ARCH_SUBDIR "${arch}" CACHE STRING "Architecture used for setting the architecture subdirectory")
45+
mark_as_advanced(SwiftTesting_ARCH_SUBDIR)
46+
47+
message(CONFIGURE_LOG "Swift Architecture: ${arch}")
48+
endif()

‎cmake/modules/SwiftModuleInstallation.cmake

+6-69
Original file line numberDiff line numberDiff line change
@@ -6,62 +6,13 @@
66
# See http://swift.org/LICENSE.txt for license information
77
# See http://swift.org/CONTRIBUTORS.txt for Swift project authors
88

9-
# Returns the os name in a variable
10-
#
11-
# Usage:
12-
# get_swift_host_os(result_var_name)
13-
#
14-
#
15-
# Sets ${result_var_name} with the converted OS name derived from
16-
# CMAKE_SYSTEM_NAME.
17-
function(get_swift_host_os result_var_name)
18-
set(${result_var_name} ${SWIFT_SYSTEM_NAME} PARENT_SCOPE)
19-
endfunction()
20-
21-
# Returns the path to the Swift Testing library installation directory
22-
#
23-
# Usage:
24-
# get_swift_testing_install_lib_dir(type result_var_name)
25-
#
26-
# Arguments:
27-
# type: The type of the library (STATIC_LIBRARY, SHARED_LIBRARY, or EXECUTABLE).
28-
# Typically, the value of the TYPE target property.
29-
# result_var_name: The name of the variable to set
30-
function(get_swift_testing_install_lib_dir type result_var_name)
31-
get_swift_host_os(swift_os)
32-
if(type STREQUAL STATIC_LIBRARY)
33-
set(swift swift_static)
34-
else()
35-
set(swift swift)
36-
endif()
37-
38-
if(APPLE)
39-
set(${result_var_name} "lib/${swift}/${swift_os}/testing" PARENT_SCOPE)
40-
else()
41-
set(${result_var_name} "lib/${swift}/${swift_os}" PARENT_SCOPE)
42-
endif()
43-
endfunction()
44-
459
function(_swift_testing_install_target module)
46-
target_compile_options(${module} PRIVATE "-no-toolchain-stdlib-rpath")
47-
48-
if(APPLE)
49-
set_target_properties(${module} PROPERTIES
50-
INSTALL_RPATH "@loader_path/.."
51-
INSTALL_REMOVE_ENVIRONMENT_RPATH ON)
52-
else()
53-
set_target_properties(${module} PROPERTIES
54-
INSTALL_RPATH "$ORIGIN"
55-
INSTALL_REMOVE_ENVIRONMENT_RPATH ON)
56-
endif()
57-
58-
get_target_property(type ${module} TYPE)
59-
get_swift_testing_install_lib_dir(${type} lib_destination_dir)
60-
6110
install(TARGETS ${module}
62-
ARCHIVE DESTINATION "${lib_destination_dir}"
63-
LIBRARY DESTINATION "${lib_destination_dir}"
11+
ARCHIVE DESTINATION "${SwiftTesting_INSTALL_LIBDIR}"
12+
LIBRARY DESTINATION "${SwiftTesting_INSTALL_LIBDIR}"
6413
RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
14+
15+
get_target_property(type ${module} TYPE)
6516
if(type STREQUAL EXECUTABLE)
6617
return()
6718
endif()
@@ -71,18 +22,7 @@ function(_swift_testing_install_target module)
7122
set(module_name ${module})
7223
endif()
7324

74-
if(NOT SwiftTesting_MODULE_TRIPLE)
75-
set(module_triple_command "${CMAKE_Swift_COMPILER}" -print-target-info)
76-
if(CMAKE_Swift_COMPILER_TARGET)
77-
list(APPEND module_triple_command -target ${CMAKE_Swift_COMPILER_TARGET})
78-
endif()
79-
execute_process(COMMAND ${module_triple_command} OUTPUT_VARIABLE target_info_json)
80-
string(JSON module_triple GET "${target_info_json}" "target" "moduleTriple")
81-
set(SwiftTesting_MODULE_TRIPLE "${module_triple}" CACHE STRING "swift module triple used for installed swiftmodule and swiftinterface files")
82-
mark_as_advanced(SwiftTesting_MODULE_TRIPLE)
83-
endif()
84-
85-
set(module_dir "${lib_destination_dir}/${module_name}.swiftmodule")
25+
set(module_dir ${SwiftTesting_INSTALL_SWIFTMODULEDIR}/${module_name}.swiftmodule)
8626
install(FILES $<TARGET_PROPERTY:${module},Swift_MODULE_DIRECTORY>/${module_name}.swiftdoc
8727
DESTINATION "${module_dir}"
8828
RENAME ${SwiftTesting_MODULE_TRIPLE}.swiftdoc)
@@ -104,9 +44,6 @@ endfunction()
10444
# swiftcrossimport_dir: The path to the source .swiftcrossimport directory
10545
# which will be installed.
10646
function(_swift_testing_install_swiftcrossimport module swiftcrossimport_dir)
107-
get_target_property(type ${module} TYPE)
108-
get_swift_testing_install_lib_dir(${type} lib_destination_dir)
109-
11047
install(DIRECTORY "${swiftcrossimport_dir}"
111-
DESTINATION "${lib_destination_dir}")
48+
DESTINATION "${SwiftTesting_INSTALL_SWIFTMODULEDIR}")
11249
endfunction()

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