support clang-10

Author: songqing

cpp/cmake_modules/CompilerInfo.cmake

@@ -78,6 +78,11 @@ elseif("${COMPILER_VERSION_FULL}" MATCHES ".*clang-9")
   set(COMPILER_FAMILY "clang")
   set(COMPILER_VERSION "4.0.0svn")
 
+# clang on Mac OS X, XCode 9.
+elseif("${COMPILER_VERSION_FULL}" MATCHES ".*clang-10")
+  set(COMPILER_FAMILY "clang")
+  set(COMPILER_VERSION "4.1.0svn")
+
 # gcc
 elseif("${COMPILER_VERSION_FULL_LOWER}" MATCHES ".*gcc[ -]version.*")
   set(COMPILER_FAMILY "gcc")