Set the default for SDL's VIDEO_MIR build option to FALSE.

Related to issue #1714.

.travis.yml

@@ -289,10 +289,6 @@ env:
     - secure: ecj/PwpbHkH9AYFsc2TMeRuNm5E3xMM8A0x4AcGhzpwDuZWdFx3R1T4G9u45Z5aUyTJWGqOeX1JPaEVVFZuYnNBKRy0kmiUrM9EE0j7WsT57K48tP1ysn2ynyvHgbYkKOfYR0t8XAMWTBbulT9DVVk3DS69//2WgiXGDVUEJTyI=
     - numjobs=4
     - ARM=1
-    # Our armhf sysroot contains an old version of MIR, SDL 2.0.5 now requires MIR version 0.24.0+
-    # Currently there is no easy way to script for this version detection because the content mir_toolkit/version.h is identical between older version and 0.24.0
-    # As a quick woraround, we always disable MIR support for ARM build for now
-    - VIDEO_MIR=0
     - USE_CCACHE=1
     - CCACHE_SLOPPINESS=pch_defines,time_macros
     - CCACHE_COMPRESS=1

Rakefile

@@ -54,7 +54,7 @@ task :cmake do
   platform = 'native'
   build_options = ''
   # TODO: Need to find a way to automatically populate the array with all the Urho3D supported build options, at the moment it only contains those being used in CI
-  ['URHO3D_64BIT', 'URHO3D_LIB_TYPE', 'URHO3D_STATIC_RUNTIME', 'URHO3D_PCH', 'URHO3D_BINDINGS', 'URHO3D_OPENGL', 'URHO3D_D3D11', 'URHO3D_TESTING', 'URHO3D_TEST_TIMEOUT', 'URHO3D_UPDATE_SOURCE_TREE', 'URHO3D_TOOLS', 'URHO3D_DEPLOYMENT_TARGET', 'URHO3D_USE_LIB64_RPM', 'CMAKE_BUILD_TYPE', 'CMAKE_OSX_DEPLOYMENT_TARGET', 'IOS', 'IPHONEOS_DEPLOYMENT_TARGET', 'WIN32', 'ANDROID', 'ANDROID_ABI', 'ANDROID_NATIVE_API_LEVEL', 'ANDROID_TOOLCHAIN_NAME', 'RPI', 'RPI_ABI', 'ARM', 'ARM_ABI_FLAGS', 'WEB', 'EMSCRIPTEN_SHARE_DATA', 'EMSCRIPTEN_EMRUN_BROWSER', 'VIDEO_MIR'].each { |var|
+  ['URHO3D_64BIT', 'URHO3D_LIB_TYPE', 'URHO3D_STATIC_RUNTIME', 'URHO3D_PCH', 'URHO3D_BINDINGS', 'URHO3D_OPENGL', 'URHO3D_D3D11', 'URHO3D_TESTING', 'URHO3D_TEST_TIMEOUT', 'URHO3D_UPDATE_SOURCE_TREE', 'URHO3D_TOOLS', 'URHO3D_DEPLOYMENT_TARGET', 'URHO3D_USE_LIB64_RPM', 'CMAKE_BUILD_TYPE', 'CMAKE_OSX_DEPLOYMENT_TARGET', 'IOS', 'IPHONEOS_DEPLOYMENT_TARGET', 'WIN32', 'ANDROID', 'ANDROID_ABI', 'ANDROID_NATIVE_API_LEVEL', 'ANDROID_TOOLCHAIN_NAME', 'RPI', 'RPI_ABI', 'ARM', 'ARM_ABI_FLAGS', 'WEB', 'EMSCRIPTEN_SHARE_DATA', 'EMSCRIPTEN_EMRUN_BROWSER'].each { |var|
     ARGV << "#{var}=\"#{ENV[var]}\"" if ENV[var] && !ARGV.find { |arg| /#{var}=/ =~ arg }
   }
   ARGV.each { |option|

Source/ThirdParty/SDL/CMakeLists.txt

@@ -292,7 +292,8 @@ dep_option(VIDEO_WAYLAND       "Use Wayland video driver" ON UNIX_SYS OFF)
 dep_option(WAYLAND_SHARED      "Dynamically load Wayland support" ON VIDEO_WAYLAND OFF)
 # Urho3D - change the VIDEO_WAYLAND_QT_TOUCH default value to FALSE (this is only needed by Sailfish[?] but we don't know way to auto-detect that yet)
 dep_option(VIDEO_WAYLAND_QT_TOUCH  "QtWayland server support for Wayland video driver" OFF VIDEO_WAYLAND OFF)
-dep_option(VIDEO_MIR           "Use Mir video driver" ON UNIX_SYS OFF)
+# Urho3D - change the VIDEO_MIR default value to FALSE (SDL requires the bleeding edge of MIR version which normal Linux distros do not provide)
+dep_option(VIDEO_MIR           "Use Mir video driver" OFF UNIX_SYS OFF)
 dep_option(MIR_SHARED          "Dynamically load Mir support" ON VIDEO_MIR OFF)
 # Urho3D - only make VIDEO_RPI option available on Raspberry-Pi platform
 dep_option(VIDEO_RPI           "Use Raspberry Pi video driver" ON RPI OFF)