Merge pull request swiftlang#32111 from gottesmm/pr-846f5396754c136c8adbf30b79b0b1c4b33ff9e5

[cmake] Move ar linking optimization rule into UnixCompileRules.cmake and only run it on Unix-like platforms.

Author: gottesmm

CMakeLists.txt

@@ -413,6 +413,8 @@ endif()
 
 if(MSVC OR "${CMAKE_SIMULATE_ID}" STREQUAL MSVC)
   include(ClangClCompileRules)
+elseif(UNIX)
+  include(UnixCompileRules)
 endif()
 
 if(CMAKE_C_COMPILER_ID MATCHES Clang)
@@ -432,19 +434,6 @@ if(SWIFT_BUILD_SYNTAXPARSERLIB OR SWIFT_BUILD_SOURCEKIT)
   endif()
 endif()
 
-#
-# Assume a new enough ar to generate the index at construction time. This avoids
-# having to invoke ranlib as a secondary command.
-#
-
-set(CMAKE_C_ARCHIVE_CREATE "<CMAKE_AR> crs <TARGET> <LINK_FLAGS> <OBJECTS>")
-set(CMAKE_C_ARCHIVE_APPEND "<CMAKE_AR> qs <TARGET> <LINK_FLAGS> <OBJECTS>")
-set(CMAKE_C_ARCHIVE_FINISH "")
-
-set(CMAKE_CXX_ARCHIVE_CREATE "<CMAKE_AR> crs <TARGET> <LINK_FLAGS> <OBJECTS>")
-set(CMAKE_CXX_ARCHIVE_APPEND "<CMAKE_AR> qs <TARGET> <LINK_FLAGS> <OBJECTS>")
-set(CMAKE_CXX_ARCHIVE_FINISH "")
-
 #
 # Include CMake modules
 #

cmake/modules/UnixCompileRules.cmake

@@ -0,0 +1,13 @@
+
+#
+# Assume a new enough ar to generate the index at construction time. This avoids
+# having to invoke ranlib as a secondary command.
+#
+
+set(CMAKE_C_ARCHIVE_CREATE "<CMAKE_AR> crs <TARGET> <LINK_FLAGS> <OBJECTS>")
+set(CMAKE_C_ARCHIVE_APPEND "<CMAKE_AR> qs <TARGET> <LINK_FLAGS> <OBJECTS>")
+set(CMAKE_C_ARCHIVE_FINISH "")
+
+set(CMAKE_CXX_ARCHIVE_CREATE "<CMAKE_AR> crs <TARGET> <LINK_FLAGS> <OBJECTS>")
+set(CMAKE_CXX_ARCHIVE_APPEND "<CMAKE_AR> qs <TARGET> <LINK_FLAGS> <OBJECTS>")
+set(CMAKE_CXX_ARCHIVE_FINISH "")