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-rw-r--r--CMakeLists.txt12
1 files changed, 12 insertions, 0 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 77ae631d0e81..1eafa4078a75 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -17,6 +17,12 @@
 # We require 3.0 for modern, target-based CMake.  We require 3.1 for the use of
 # CXX_STANDARD in our targets.
 cmake_minimum_required(VERSION 3.1)
+
+# Compiler id for Apple Clang is now AppleClang.
+if (POLICY CMP0025)
+  cmake_policy(SET CMP0025 NEW)
+endif()
+
 project(absl)
 
 list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_LIST_DIR}/CMake)
@@ -68,6 +74,12 @@ set(CMAKE_CXX_FLAGS "${ABSL_STD_CXX_FLAG} ${CMAKE_CXX_FLAGS}")
 # -fexceptions
 set(ABSL_EXCEPTIONS_FLAG "${CMAKE_CXX_EXCEPTIONS}")
 
+if("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
+  set(ABSL_USING_CLANG ON)
+else()
+  set(ABSL_USING_CLANG OFF)
+endif()
+
 # find dependencies
 ## pthread
 find_package(Threads REQUIRED)