support Xcode versions < 10.1

Author: MSNexploder

ios.toolchain.cmake

@@ -141,12 +141,20 @@ set(IOS_PLATFORM ${IOS_PLATFORM} CACHE STRING
 if (IOS_PLATFORM STREQUAL "OS")
   set(XCODE_IOS_PLATFORM iphoneos)
   if(NOT IOS_ARCH)
-    set(IOS_ARCH armv7 armv7s arm64 arm64e)
+    if (XCODE_VERSION VERSION_GREATER 10.0)
+      set(IOS_ARCH armv7 armv7s arm64 arm64e)
+    else()
+      set(IOS_ARCH armv7 armv7s arm64)
+    endif()
   endif()
  elseif (IOS_PLATFORM STREQUAL "OS64")
   set(XCODE_IOS_PLATFORM iphoneos)
   if(NOT IOS_ARCH)
-    set(IOS_ARCH arm64 arm64e)
+    if (XCODE_VERSION VERSION_GREATER 10.0)
+      set(IOS_ARCH arm64 arm64e)
+    else()
+      set(IOS_ARCH arm64)
+    endif()
   endif()
 elseif (IOS_PLATFORM STREQUAL "SIMULATOR")
   set(XCODE_IOS_PLATFORM iphonesimulator)