Merge pull request #1320 from UV-CDAT/issue_1319_match_osx_toSDK

matches sdk to os or fails. fix #1319

CMakeLists.txt

@@ -119,26 +119,25 @@ if(APPLE)
   if(IS_DIRECTORY "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk")
     set(HAVE_10_10_SDK TRUE)
   endif()
-
   # Try for the lowest version SDK we can
-  if(HAVE_10_8_SDK)
-      set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -headerpad_max_install_names")
-      set(CMAKE_OSX_DEPLOYMENT_TARGET 10.8 CACHE STRING "" FORCE)
-      set(CMAKE_OSX_SYSROOT "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk" CACHE PATH "" FORCE)
-  elseif(HAVE_10_9_SDK)
-      set(CMAKE_C_COMPILER clang)
-      set(CMAKE_CXX_COMPILER clang++)
-      set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -headerpad_max_install_names")
-      set(CMAKE_OSX_DEPLOYMENT_TARGET 10.9 CACHE STRING "" FORCE)
-      set(CMAKE_OSX_SYSROOT "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk" CACHE PATH "" FORCE)
-  elseif(HAVE_10_10_SDK)
-      set(CMAKE_C_COMPILER clang)
-      set(CMAKE_CXX_COMPILER clang++)
-      set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -headerpad_max_install_names")
-      set(CMAKE_OSX_DEPLOYMENT_TARGET 10.10 CACHE STRING "" FORCE)
-      set(CMAKE_OSX_SYSROOT "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk" CACHE PATH "" FORCE)
+  if ((${OSX_VER_MAJOR} VERSION_EQUAL 8) AND (HAVE_10_8_SDK))
+    set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -headerpad_max_install_names")
+    set(CMAKE_OSX_DEPLOYMENT_TARGET 10.8 CACHE STRING "" FORCE)
+    set(CMAKE_OSX_SYSROOT "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk" CACHE PATH "" FORCE)
+  elseif((${OS_X_VER_MAJOR} VERSION_EQUAL 9) AND (HAVE_10_9_SDK))
+    set(CMAKE_C_COMPILER clang)
+    set(CMAKE_CXX_COMPILER clang++)
+    set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -headerpad_max_install_names")
+    set(CMAKE_OSX_DEPLOYMENT_TARGET 10.9 CACHE STRING "" FORCE)
+    set(CMAKE_OSX_SYSROOT "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk" CACHE PATH "" FORCE)
+  elseif((${OSX_VER_MAJOR} VERSION_EQUAL 10) AND (HAVE_10_10_SDK))
+    set(CMAKE_C_COMPILER clang)
+    set(CMAKE_CXX_COMPILER clang++)
+    set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -headerpad_max_install_names")
+    set(CMAKE_OSX_DEPLOYMENT_TARGET 10.10 CACHE STRING "" FORCE)
+    set(CMAKE_OSX_SYSROOT "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk" CACHE PATH "" FORCE)
   else()
-      message(FATAL_ERROR "[ERROR] CMAKE_OSX_SYSROOT='${CMAKE_OSX_SYSROOT}' not found. Requires MacOS X 10.8 or higher")
+    message(FATAL_ERROR "[ERROR] Could not match your OS VERSION (${OSX_VER_MAJOR}.${OSX_VER_MINOR}) with any of your SDKs, or OS not supported yet")
   endif()
 
 endif()