Reduces dependencies on APPLE platforms, unless advanced flag set.

hylo-lang · Feb 17, 2024 · 3be8d62 · 3be8d62
1 parent 9a25c15
commit 3be8d62
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Showing 2 changed files with 61 additions and 54 deletions.
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -13,27 +13,31 @@ enable_testing()
 
 list(PREPEND CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake/modules)
 
+option(SwiftCMakeXCTesting_FORCE_BUILD_GenerateXCTestMain
+  "Force-build generate-xctest-main on platforms where it's not needed." OFF)
+mark_as_advanced(SwiftCMakeXCTesting_FORCE_BUILD_GenerateXCTestMain)
+
 if (PROJECT_IS_TOP_LEVEL)
   include(${PROJECT_SOURCE_DIR}/cmake/TopLevelDefaults.cmake)
 endif()
 
-
-
-#
-# Local targets
-#
-
-add_executable(generate-xctest-main Sources/GenerateXCTestMain.swift)
-target_link_libraries(generate-xctest-main
-  ArgumentParser
-  SwiftSyntax
-  SwiftSyntaxBuilder
-  SwiftOperators
-  SwiftParser
-  SwiftParserDiagnostics
-)
-# Needed where @main is used.
-target_compile_options(generate-xctest-main PRIVATE -parse-as-library)
+if(NOT APPLE OR SwiftCMakeXCTesting_FORCE_BUILD_GenerateXCTestMain)
+  find_package(ArgumentParser REQUIRED)
+  find_package(SwiftSyntax REQUIRED)
+
+  add_executable(generate-xctest-main Sources/GenerateXCTestMain.swift)
+  target_link_libraries(generate-xctest-main
+    ArgumentParser
+    SwiftSyntax
+    SwiftSyntaxBuilder
+    SwiftOperators
+    SwiftParser
+    SwiftParserDiagnostics
+  )
+
+  # Needed where @main is used.
+  target_compile_options(generate-xctest-main PRIVATE -parse-as-library)
+endif()
 
 if(ENABLE_TESTING)
   include(${PROJECT_SOURCE_DIR}/cmake/modules/SwiftCMakeXCTesting.cmake)

diff --git a/cmake/modules/SwiftCMakeXCTesting_FetchDependencies.cmake b/cmake/modules/SwiftCMakeXCTesting_FetchDependencies.cmake
@@ -3,41 +3,44 @@
 
 include(FetchContent)
 
-block()
-  set(FETCHCONTENT_TRY_FIND_PACKAGE_MODE NEVER)
-
-  FetchContent_Declare(SwiftSyntax
-    GIT_REPOSITORY https://github.com/apple/swift-syntax.git
-    GIT_TAG        main
-    OVERRIDE_FIND_PACKAGE
-  )
-
-  FetchContent_Declare(ArgumentParser
-    GIT_REPOSITORY https://github.com/apple/swift-argument-parser.git
-    GIT_TAG        1.3.0
-    OVERRIDE_FIND_PACKAGE
-  )
-endblock()
-
-# See https://github.com/apple/swift-syntax/pull/2454, which will hopefully make this clause
-# unnecessary.  Without it CMake will fatal error when loading SwiftSyntax on some platforms.
-if("${SWIFT_HOST_MODULE_TRIPLE}" STREQUAL "")
-  execute_process(COMMAND ${CMAKE_Swift_COMPILER}
-    -print-target-info OUTPUT_VARIABLE target-info)
-  string(JSON SWIFT_HOST_MODULE_TRIPLE GET ${target-info} target moduleTriple)
-endif()
-
-block()
-  set(BUILD_EXAMPLES NO)
-  set(BUILD_TESTING NO)
-
-  FetchContent_MakeAvailable(ArgumentParser SwiftSyntax)
-endblock()
-
-# Suppress noisy warnings from dependencies.
-target_compile_options(SwiftCompilerPluginMessageHandling PRIVATE -suppress-warnings)
-target_compile_options(SwiftParser PRIVATE -suppress-warnings)
-target_compile_options(SwiftParserDiagnostics PRIVATE -suppress-warnings)
-target_compile_options(SwiftSyntaxMacroExpansion PRIVATE -suppress-warnings)
-target_compile_options(SwiftOperators PRIVATE -suppress-warnings)
+if(NOT APPLE OR SwiftCMakeXCTesting_FORCE_BUILD_GenerateXCTestMain)
+
+  block()
+    set(FETCHCONTENT_TRY_FIND_PACKAGE_MODE NEVER)
+
+    FetchContent_Declare(SwiftSyntax
+      GIT_REPOSITORY https://github.com/apple/swift-syntax.git
+      GIT_TAG        main
+      OVERRIDE_FIND_PACKAGE
+    )
+
+    FetchContent_Declare(ArgumentParser
+      GIT_REPOSITORY https://github.com/apple/swift-argument-parser.git
+      GIT_TAG        1.3.0
+      OVERRIDE_FIND_PACKAGE
+    )
+  endblock()
+
+  # See https://github.com/apple/swift-syntax/pull/2454, which will hopefully make this clause
+  # unnecessary.  Without it CMake will fatal error when loading SwiftSyntax on some platforms.
+  if("${SWIFT_HOST_MODULE_TRIPLE}" STREQUAL "")
+    execute_process(COMMAND ${CMAKE_Swift_COMPILER}
+      -print-target-info OUTPUT_VARIABLE target-info)
+    string(JSON SWIFT_HOST_MODULE_TRIPLE GET ${target-info} target moduleTriple)
+  endif()
+
+  block()
+    set(BUILD_EXAMPLES NO)
+    set(BUILD_TESTING NO)
+
+    FetchContent_MakeAvailable(ArgumentParser SwiftSyntax)
+  endblock()
+
+  # Suppress noisy warnings from dependencies.
+  target_compile_options(SwiftCompilerPluginMessageHandling PRIVATE -suppress-warnings)
+  target_compile_options(SwiftParser PRIVATE -suppress-warnings)
+  target_compile_options(SwiftParserDiagnostics PRIVATE -suppress-warnings)
+  target_compile_options(SwiftSyntaxMacroExpansion PRIVATE -suppress-warnings)
+  target_compile_options(SwiftOperators PRIVATE -suppress-warnings)
 
+endif()