[llvm] 05a165b - [llvm/cmake/config-ix.cmake] If `LD64_EXECUTABLE` is already set, avoid the need to look up `ld64`

[Argyrios Kyrtzidis via llvm-commits]

Author: Argyrios Kyrtzidis
Date: 2022-11-05T20:58:41-07:00
New Revision: 05a165bf0434e135c6a853731f92669b4b7fda98

URL: https://github.com/llvm/llvm-project/commit/05a165bf0434e135c6a853731f92669b4b7fda98
DIFF: https://github.com/llvm/llvm-project/commit/05a165bf0434e135c6a853731f92669b4b7fda98.diff

LOG: [llvm/cmake/config-ix.cmake] If `LD64_EXECUTABLE` is already set, avoid the need to look up `ld64`

This provides option to set the `LD64_EXECUTABLE` variable to a path at CMake configure time directly.

Added: 
    

Modified: 
    llvm/cmake/config-ix.cmake

Removed: 
    


################################################################################
diff  --git a/llvm/cmake/config-ix.cmake b/llvm/cmake/config-ix.cmake
index 74ffaf7bfdec7..ba85da6a8c3d0 100644
--- a/llvm/cmake/config-ix.cmake
+++ b/llvm/cmake/config-ix.cmake
@@ -622,15 +622,17 @@ if(CMAKE_GENERATOR MATCHES "Ninja" AND
 endif()
 
 if(CMAKE_HOST_APPLE AND APPLE)
-  if(NOT CMAKE_XCRUN)
-    find_program(CMAKE_XCRUN NAMES xcrun)
-  endif()
-  if(CMAKE_XCRUN)
-    execute_process(COMMAND ${CMAKE_XCRUN} -find ld
-      OUTPUT_VARIABLE LD64_EXECUTABLE
-      OUTPUT_STRIP_TRAILING_WHITESPACE)
-  else()
-    find_program(LD64_EXECUTABLE NAMES ld DOC "The ld64 linker")
+  if(NOT LD64_EXECUTABLE)
+    if(NOT CMAKE_XCRUN)
+      find_program(CMAKE_XCRUN NAMES xcrun)
+    endif()
+    if(CMAKE_XCRUN)
+      execute_process(COMMAND ${CMAKE_XCRUN} -find ld
+        OUTPUT_VARIABLE LD64_EXECUTABLE
+        OUTPUT_STRIP_TRAILING_WHITESPACE)
+    else()
+      find_program(LD64_EXECUTABLE NAMES ld DOC "The ld64 linker")
+    endif()
   endif()
 
   if(LD64_EXECUTABLE)