Avoid adding redundant temporary RUNPATH to builder's stdlib

Many shared libs and executables are only run after stdlib/runtime are
built. They don't need to link with builders stdlib at all.

Author: rintaro

cmake/modules/AddPureSwift.cmake

@@ -80,8 +80,7 @@ function(_set_pure_swift_link_flags name relpath_to_lib_dir)
       APPEND PROPERTY INSTALL_RPATH
         # At runtime, use swiftCore in the current toolchain.
         "$ORIGIN/${relpath_to_lib_dir}/swift/${SWIFT_SDK_${SWIFT_HOST_VARIANT_SDK}_LIB_SUBDIR}"
-        # But before building the stdlib with the tool, use the builder libs. This should be removed in install time.
-        "${host_lib_dir}")
+    )
 
   endif()
 endfunction()

cmake/modules/AddSwift.cmake

@@ -440,7 +440,7 @@ function(_add_host_variant_link_flags target)
   endif()
 endfunction()
 
-function(_add_swift_runtime_link_flags target relpath_to_lib_dir bootstrapping)
+function(_add_swift_runtime_link_flags target relpath_to_lib_dir bootstrapping required_for_minimal_compiler)
   if(NOT BOOTSTRAPPING_MODE)
     if (SWIFT_SWIFT_PARSER)
       set(ASRLF_BOOTSTRAPPING_MODE "HOSTTOOLS")
@@ -553,7 +553,7 @@ function(_add_swift_runtime_link_flags target relpath_to_lib_dir bootstrapping)
       # FIXME: This assumes the ABI hasn't changed since the builder.
       set(swift_runtime_rpath "$ORIGIN/${relpath_to_lib_dir}/swift/${SWIFT_SDK_${SWIFT_HOST_VARIANT_SDK}_LIB_SUBDIR}")
 
-      if(ASRLF_BOOTSTRAPPING_MODE STREQUAL "HOSTTOOLS")
+      if(ASRLF_BOOTSTRAPPING_MODE STREQUAL "HOSTTOOLS" AND required_for_minimal_compiler)
         # But before building the stdlib with the tool, use the builder libs. This should be removed in install time.
         list(APPEND swift_runtime_rpath "${host_lib_dir}")
       endif()
@@ -745,7 +745,7 @@ function(add_swift_host_library name)
   _set_target_prefix_and_suffix(${name} "${libkind}" "${SWIFT_HOST_VARIANT_SDK}")
 
   if (ASHL_SHARED AND ASHL_HAS_SWIFT_MODULES)
-      _add_swift_runtime_link_flags(${name} "." "")
+      _add_swift_runtime_link_flags(${name} "." "" FALSE)
   endif()
 
   # Set compilation and link flags.
@@ -833,8 +833,44 @@ macro(add_swift_lib_subdirectory name)
   add_llvm_subdirectory(SWIFT LIB ${name})
 endmacro()
 
+# Add a new Swift host executable.
+#
+# Usage:
+#   add_swift_host_tool(name
+#     [HAS_SWIFT_MODULES]
+#     [THINLTO_LD64_ADD_FLTO_CODEGEN_ONLY]
+#     [REQUIRED_FOR_MINIMAL_COMPILER]
+#
+#     [BOOTSTRAPPING 0|1]
+#     [SWIFT_COMPONENT component]
+#     [LLVM_LINK_COMPONENTS comp1 ...]
+#     source1 [source2 source3 ...])
+#
+# name
+#   Name of the executable (e.g., swift-frontend).
+#
+# HAS_SWIFT_MODULES
+#   Whether to link with SwiftCompilerSources library
+#
+# THINLTO_LD64_ADD_FLTO_CODEGEN_ONLY
+#   Opt-out of LLVM IR optimizations when linking ThinLTO with ld64
+#
+# REQUIRED_FOR_MINIMAL_COMPILER
+#   Required for building standard libraries.
+#
+# BOOTSTRAPPING
+#   Bootstrapping stage.
+#
+# SWIFT_COMPONENT
+#   Installation component where this tool belongs to.
+#
+# LLVM_LINK_COMPONENTS
+#   LLVM components this library depends on.
+#
+# source1 ...
+#   Sources to add into this executable.
 function(add_swift_host_tool executable)
-  set(options HAS_SWIFT_MODULES THINLTO_LD64_ADD_FLTO_CODEGEN_ONLY)
+  set(options HAS_SWIFT_MODULES THINLTO_LD64_ADD_FLTO_CODEGEN_ONLY REQUIRED_FOR_MINIMAL_COMPILER)
   set(single_parameter_options SWIFT_COMPONENT BOOTSTRAPPING)
   set(multiple_parameter_options LLVM_LINK_COMPONENTS)
 
@@ -895,7 +931,7 @@ function(add_swift_host_tool executable)
   endif()
 
   if (ASHT_HAS_SWIFT_MODULES)
-      _add_swift_runtime_link_flags(${executable} "../lib" "${ASHT_BOOTSTRAPPING}")
+    _add_swift_runtime_link_flags(${executable} "../lib" "${ASHT_BOOTSTRAPPING}" "${ASHT_REQUIRED_FOR_MINIMAL_COMPILER}")
   endif()
 
   llvm_update_compile_flags(${executable})
@@ -971,11 +1007,13 @@ function(add_swift_host_tool executable)
                                  COMPONENT ${ASHT_SWIFT_COMPONENT}
     )
 
-    swift_install_strip_builder_rpath(
-      TARGETS ${executable}
-      DESTINATION bin
-      COMPONENT ${ASHT_SWIFT_COMPONENT}
-    )
+    if (ASHT_REQUIRED_FOR_MINIMAL_COMPILER)
+      swift_install_strip_builder_rpath(
+        TARGETS ${executable}
+        DESTINATION bin
+        COMPONENT ${ASHT_SWIFT_COMPONENT}
+      )
+    endif()
 
     swift_is_installing_component(${ASHT_SWIFT_COMPONENT} is_installing)
   endif()

cmake/modules/AddSwiftUnittests.cmake

@@ -113,7 +113,7 @@ function(add_swift_unittest test_dirname)
 
   if (SWIFT_SWIFT_PARSER AND NOT ASU_IS_TARGET_TEST)
     # Link to stdlib the compiler uses.
-    _add_swift_runtime_link_flags(${test_dirname} "../../lib" "")
+    _add_swift_runtime_link_flags(${test_dirname} "../../lib" "" FALSE)
     set_property(TARGET ${test_dirname} PROPERTY BUILD_WITH_INSTALL_RPATH OFF)
   endif()
 endfunction()

lib/Macros/CMakeLists.txt

@@ -67,12 +67,6 @@ function(add_swift_macro_library name)
       DESTINATION "${destination_dir}"
       COMPONENT compiler)
 
-  swift_install_strip_builder_rpath(
-    TARGETS ${name}
-    DESTINATION "${destination_dir}"
-    COMPONENT compiler
-  )
-
   # Export this macro plugin target.
   set_property(GLOBAL APPEND PROPERTY SWIFT_MACRO_PLUGINS ${name})
 endfunction()

lib/SwiftDemangle/CMakeLists.txt

@@ -17,10 +17,3 @@ swift_install_in_component(TARGETS swiftDemangle
   ARCHIVE
     DESTINATION "lib${LLVM_LIBDIR_SUFFIX}"
     COMPONENT compiler)
-
-
-swift_install_strip_builder_rpath(
-  TARGETS swiftDemangle
-  DESTINATION "lib${LLVM_LIBDIR_SUFFIX}"
-  COMPONENT compiler
-)

tools/SourceKit/cmake/modules/AddSwiftSourceKit.cmake

@@ -303,14 +303,6 @@ macro(add_sourcekit_library name)
       DESTINATION "bin"
       COMPONENT "${SOURCEKITLIB_INSTALL_IN_COMPONENT}")
 
-  if(SOURCEKITLIB_SHARED)
-    swift_install_strip_builder_rpath(
-      TARGETS ${name}
-      DESTINATION "lib${LLVM_LIBDIR_SUFFIX}"
-      COMPONENT "${SOURCEKITLIB_INSTALL_IN_COMPONENT}"
-    )
-  endif()
-
   swift_install_in_component(FILES ${SOURCEKITLIB_HEADERS}
                              DESTINATION "include/SourceKit"
                              COMPONENT "${SOURCEKITLIB_INSTALL_IN_COMPONENT}")

tools/SourceKit/tools/complete-test/CMakeLists.txt

@@ -27,9 +27,3 @@ endif()
 add_dependencies(tools complete-test)
 swift_install_in_component(TARGETS complete-test
   RUNTIME DESTINATION bin COMPONENT tools)
-
-swift_install_strip_builder_rpath(
-  TARGETS complete-test
-  DESTINATION bin
-  COMPONENT tools
-)

tools/SourceKit/tools/sourcekitd-repl/CMakeLists.txt

@@ -29,9 +29,3 @@ endif()
 add_dependencies(tools sourcekitd-repl)
 swift_install_in_component(TARGETS sourcekitd-repl
   RUNTIME DESTINATION bin COMPONENT tools)
-
-swift_install_strip_builder_rpath(
-  TARGETS sourcekitd-repl
-  DESTINATION bin
-  COMPONENT tools
-)

tools/SourceKit/tools/sourcekitd-test/CMakeLists.txt

@@ -39,9 +39,3 @@ endif()
 add_dependencies(tools sourcekitd-test)
 swift_install_in_component(TARGETS sourcekitd-test
   RUNTIME DESTINATION bin COMPONENT tools)
-
-swift_install_strip_builder_rpath(
-  TARGETS sourcekitd-test
-  DESTINATION bin
-  COMPONENT tools
-)

tools/driver/CMakeLists.txt

@@ -26,6 +26,7 @@ if(BOOTSTRAPPING_MODE MATCHES "BOOTSTRAPPING.*")
     HAS_SWIFT_MODULES
     BOOTSTRAPPING 0
     THINLTO_LD64_ADD_FLTO_CODEGEN_ONLY
+    REQUIRED_FOR_MINIMAL_COMPILER
   )
   target_link_libraries(swift-frontend-bootstrapping0
                         PRIVATE
@@ -47,6 +48,7 @@ if(BOOTSTRAPPING_MODE MATCHES "BOOTSTRAPPING.*")
     HAS_SWIFT_MODULES
     BOOTSTRAPPING 1
     THINLTO_LD64_ADD_FLTO_CODEGEN_ONLY
+    REQUIRED_FOR_MINIMAL_COMPILER
   )
   target_link_libraries(swift-frontend-bootstrapping1
                         PRIVATE
@@ -65,6 +67,7 @@ add_swift_host_tool(swift-frontend
   driver.cpp
   SWIFT_COMPONENT compiler
   HAS_SWIFT_MODULES
+  REQUIRED_FOR_MINIMAL_COMPILER
 )
 target_link_libraries(swift-frontend
                       PUBLIC