Move the setting of LLVM_BUILD_MODE to a macro so that we can re-use it in compiler-rt

Differential Revision: https://reviews.llvm.org/D38470

llvm-svn: 318034
diff --git a/llvm/cmake/modules/AddLLVM.cmake b/llvm/cmake/modules/AddLLVM.cmake
index 62e264e..25c2441 100644
--- a/llvm/cmake/modules/AddLLVM.cmake
+++ b/llvm/cmake/modules/AddLLVM.cmake
@@ -1124,6 +1124,15 @@
   endforeach()
 endfunction(llvm_canonicalize_cmake_booleans)
 
+macro(set_llvm_build_mode)
+  # Configuration-time: See Unit/lit.site.cfg.in
+  if (CMAKE_CFG_INTDIR STREQUAL ".")
+    set(LLVM_BUILD_MODE ".")
+  else ()
+    set(LLVM_BUILD_MODE "%(build_mode)s")
+  endif ()
+endmacro()
+
 # This function provides an automatic way to 'configure'-like generate a file
 # based on a set of common and custom variables, specifically targeting the
 # variables needed for the 'lit.site.cfg' files. This function bundles the
@@ -1147,12 +1156,7 @@
 
   set(SHLIBEXT "${LTDL_SHLIB_EXT}")
 
-  # Configuration-time: See Unit/lit.site.cfg.in
-  if (CMAKE_CFG_INTDIR STREQUAL ".")
-    set(LLVM_BUILD_MODE ".")
-  else ()
-    set(LLVM_BUILD_MODE "%(build_mode)s")
-  endif ()
+  set_llvm_build_mode()
 
   # They below might not be the build tree but provided binary tree.
   set(LLVM_SOURCE_DIR ${LLVM_MAIN_SRC_DIR})