[CMake] Print the autodetected host linker version

There's no easy way to find out what the autodetected version is, but
sometimes it may be useful to confirm that the right version is being
used. Print it as CMake status message.

Differential Revision: https://reviews.llvm.org/D85362

Author: petrhosek

clang/CMakeLists.txt

@@ -424,15 +424,15 @@ if (APPLE)
     RESULT_VARIABLE HAD_ERROR
     OUTPUT_VARIABLE LD_V_OUTPUT
   )
-  if (NOT HAD_ERROR)
-    if ("${LD_V_OUTPUT}" MATCHES ".*ld64-([0-9.]+).*")
-      string(REGEX REPLACE ".*ld64-([0-9.]+).*" "\\1" HOST_LINK_VERSION ${LD_V_OUTPUT})
-    elseif ("${LD_V_OUTPUT}" MATCHES "[^0-9]*([0-9.]+).*")
-      string(REGEX REPLACE "[^0-9]*([0-9.]+).*" "\\1" HOST_LINK_VERSION ${LD_V_OUTPUT})
-    endif()
-  else()
+  if (HAD_ERROR)
     message(FATAL_ERROR "${CMAKE_LINKER} failed with status ${HAD_ERROR}")
   endif()
+  if ("${LD_V_OUTPUT}" MATCHES ".*ld64-([0-9.]+).*")
+    string(REGEX REPLACE ".*ld64-([0-9.]+).*" "\\1" HOST_LINK_VERSION ${LD_V_OUTPUT})
+  elseif ("${LD_V_OUTPUT}" MATCHES "[^0-9]*([0-9.]+).*")
+    string(REGEX REPLACE "[^0-9]*([0-9.]+).*" "\\1" HOST_LINK_VERSION ${LD_V_OUTPUT})
+  endif()
+  message(STATUS "Host linker version: ${HOST_LINK_VERSION}")
 endif()
 
 include(CMakeParseArguments)