Index: cmake/modules/AddLLVM.cmake
===================================================================
--- cmake/modules/AddLLVM.cmake
+++ cmake/modules/AddLLVM.cmake
@@ -1389,10 +1389,18 @@
   endif()
 
   if(NOT LLVM_EXTERNALIZE_DEBUGINFO_SKIP_STRIP)
-    set(strip_command COMMAND xcrun strip -Sxl $<TARGET_FILE:${name}>)
+    if(APPLE)
+      set(strip_command COMMAND xcrun strip -Sxl $<TARGET_FILE:${name}>)
+    else()
+      set(strip_command COMMAND strip -gx $<TARGET_FILE:${name}>)
+    endif()
   endif()
 
   if(APPLE)
+    if(NOT LLVM_EXTERNALIZE_DEBUGINFO_SKIP_STRIP)
+      set(strip_command COMMAND xcrun strip -Sxl $<TARGET_FILE:${name}>)
+    endif()
+
     if(CMAKE_CXX_FLAGS MATCHES "-flto"
       OR CMAKE_CXX_FLAGS_${uppercase_CMAKE_BUILD_TYPE} MATCHES "-flto")
 
@@ -1405,7 +1413,14 @@
       ${strip_command}
       )
   else()
-    message(FATAL_ERROR "LLVM_EXTERNALIZE_DEBUGINFO isn't implemented for non-darwin platforms!")
+    if(NOT LLVM_EXTERNALIZE_DEBUGINFO_SKIP_STRIP)
+      set(strip_command COMMAND strip -gx $<TARGET_FILE:${name}>)
+    endif()
+
+    add_custom_command(TARGET ${name} POST_BUILD
+      COMMAND objcopy --only-keep-debug $<TARGET_FILE:${name}> $<TARGET_FILE:${name}>.dbg
+      ${strip_command}
+      )
   endif()
 endfunction()