Merge branch 'cmake-min-ios-version' of https://github.com/discnl/wxWidgets

Differentiate between macOS and iOS minimal supported version for CMake
builds.

See https://github.com/wxWidgets/wxWidgets/pull/2146

samples/minimal/CMakeLists.txt

@@ -16,6 +16,16 @@
 # Declare the minimum required CMake version
 cmake_minimum_required(VERSION 2.8.12)
 
+if(APPLE AND NOT CMAKE_OSX_DEPLOYMENT_TARGET)
+    # If no deployment target has been set default to the minimum supported
+    # OS version (this has to be set before the first project() call)
+    if(CMAKE_SYSTEM_NAME STREQUAL "iOS")
+        set(CMAKE_OSX_DEPLOYMENT_TARGET 12.0 CACHE STRING "iOS Deployment Target")
+    else()
+        set(CMAKE_OSX_DEPLOYMENT_TARGET 10.10 CACHE STRING "macOS Deployment Target")
+    endif()
+endif()
+
 # Name the project
 project(minimal)