Preparation for using CMake for more than Windows by only checking for WIN_ATOMICS32/64 on Windows

storage/innobase/CMakeLists.txt

@@ -25,7 +25,8 @@ IF(CMAKE_GENERATOR MATCHES "Visual Studio" AND CMAKE_SIZEOF_VOID_P MATCHES 8)
                               PROPERTIES COMPILE_FLAGS -Od)
 ENDIF(CMAKE_GENERATOR MATCHES "Visual Studio" AND CMAKE_SIZEOF_VOID_P MATCHES 8)
 
-IF (NOT WITHOUT_ATOMICS)
+IF (WIN32)
+  IF (NOT WITHOUT_ATOMICS)
 # Check if this Windows version supports atomic instructions
     IF (CMAKE_SIZEOF_VOID_P MATCHES 8)
 # Check for 64 bit atomics
@@ -44,8 +45,8 @@ IF (NOT WITHOUT_ATOMICS)
         ADD_DEFINITIONS(-DWIN_ATOMICS32)
       ENDIF (COMPILE_RES AND NOT RUN_RES)
     ENDIF (CMAKE_SIZEOF_VOID_P MATCHES 8)
-ENDIF (NOT WITHOUT_ATOMICS)
-
+  ENDIF (NOT WITHOUT_ATOMICS)
+ENDIF (WIN32)
 INCLUDE_DIRECTORIES(${CMAKE_SOURCE_DIR}/include ${CMAKE_SOURCE_DIR}/zlib
                     ${CMAKE_SOURCE_DIR}/storage/innobase/include
                     ${CMAKE_SOURCE_DIR}/storage/innobase/handler