Merge pull request swiftlang#62972 from artemcm/MoveLibSwiftScanToHostDir

Set install path of libSwiftScan to 'lib/swift/host' instead of platform-specific path string

Author: artemcm

tools/libSwiftScan/CMakeLists.txt

@@ -45,10 +45,38 @@ add_llvm_symbol_exports(libSwiftScan ${LLVM_EXPORTED_SYMBOL_FILE})
 add_link_opts(libSwiftScan)
 
 add_dependencies(compiler libSwiftScan)
+
+
+if(CMAKE_HOST_SYSTEM_NAME STREQUAL Windows)
 swift_install_in_component(TARGETS libSwiftScan
   ARCHIVE DESTINATION "lib${LLVM_LIBDIR_SUFFIX}/swift/${SWIFT_SDK_${SWIFT_HOST_VARIANT_SDK}_LIB_SUBDIR}" COMPONENT compiler
   LIBRARY DESTINATION "lib${LLVM_LIBDIR_SUFFIX}/swift/${SWIFT_SDK_${SWIFT_HOST_VARIANT_SDK}_LIB_SUBDIR}" COMPONENT compiler
   RUNTIME DESTINATION "bin" COMPONENT compiler)
+else()
+  # On other platforms, instead install the library into 'lib/swift/host' and symlink to it from 'lib/swift/${SWIFT_SDK_${SWIFT_HOST_VARIANT_SDK}_LIB_SUBDIR}'
+  swift_install_in_component(TARGETS libSwiftScan
+    ARCHIVE DESTINATION "lib${LLVM_LIBDIR_SUFFIX}/swift/host" COMPONENT compiler
+    LIBRARY DESTINATION "lib${LLVM_LIBDIR_SUFFIX}/swift/host" COMPONENT compiler
+    RUNTIME DESTINATION "bin" COMPONENT compiler)
+
+  # Create a symlink to previously-used path of 'lib/swift/${SWIFT_SDK_${SWIFT_HOST_VARIANT_SDK}_LIB_SUBDIR}'
+  # to the new location under 'lib/swift/host' for clients of the legacy path.
+  if(EXISTS ${LLVM_CMAKE_DIR}/LLVMInstallSymlink.cmake)
+    set(INSTALL_SYMLINK ${LLVM_CMAKE_DIR}/LLVMInstallSymlink.cmake)
+  endif()
+  precondition(INSTALL_SYMLINK
+               MESSAGE "LLVMInstallSymlink script must be available.")
+  file(RELATIVE_PATH target_install_relative_path
+       ${CMAKE_INSTALL_PREFIX}/lib${LLVM_LIBDIR_SUFFIX}/swift/${SWIFT_SDK_${SWIFT_HOST_VARIANT_SDK}_LIB_SUBDIR}
+       ${CMAKE_INSTALL_PREFIX}/lib${LLVM_LIBDIR_SUFFIX}/swift/host/lib${SWIFT_SCAN_LIB_NAME}${CMAKE_SHARED_LIBRARY_SUFFIX})
+  message(STATUS "Installing symlink (${target_install_relative_path}) to lib${LLVM_LIBDIR_SUFFIX}/swift/${SWIFT_SDK_${SWIFT_HOST_VARIANT_SDK}_LIB_SUBDIR}/lib${SWIFT_SCAN_LIB_NAME}${CMAKE_SHARED_LIBRARY_SUFFIX}")
+  install(SCRIPT ${INSTALL_SYMLINK}
+          CODE "install_symlink(lib${SWIFT_SCAN_LIB_NAME}${CMAKE_SHARED_LIBRARY_SUFFIX}
+                                ${target_install_relative_path}
+                                lib${LLVM_LIBDIR_SUFFIX}/swift/${SWIFT_SDK_${SWIFT_HOST_VARIANT_SDK}_LIB_SUBDIR})"
+          COMPONENT compiler)
+endif()
+
 swift_install_in_component(DIRECTORY "${SWIFT_MAIN_INCLUDE_DIR}/swift-c/DependencyScan/"
                            DESTINATION "lib${LLVM_LIBDIR_SUFFIX}/swift/${SWIFT_SCAN_LIB_NAME}"
                            COMPONENT compiler)