Index: ext/googletest/appveyor.yml
===================================================================
diff -u -N -r4a481bbe77043e0bda2435c6d62a02700b3e46c5 -r2e4eacb299f21d06196fe13140b4b0d095abdca9
--- ext/googletest/appveyor.yml	(.../appveyor.yml)	(revision 4a481bbe77043e0bda2435c6d62a02700b3e46c5)
+++ ext/googletest/appveyor.yml	(.../appveyor.yml)	(revision 2e4eacb299f21d06196fe13140b4b0d095abdca9)
@@ -4,68 +4,101 @@
 
 environment:
   matrix:
-  - Toolset: v140
-  - Toolset: v120
-  - Toolset: v110
-  - Toolset: v100
+    - compiler: msvc-15-seh
+      generator: "Visual Studio 15 2017"
+      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
 
-platform:
-  - Win32
-  - x64
+    - compiler: msvc-15-seh
+      generator: "Visual Studio 15 2017 Win64"
+      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+      enabled_on_pr: yes
 
+    - compiler: msvc-14-seh
+      generator: "Visual Studio 14 2015"
+      enabled_on_pr: yes
+
+    - compiler: msvc-14-seh
+      generator: "Visual Studio 14 2015 Win64"
+
+    - compiler: gcc-5.3.0-posix
+      generator: "MinGW Makefiles"
+      cxx_path: 'C:\mingw-w64\i686-5.3.0-posix-dwarf-rt_v4-rev0\mingw32\bin'
+
+    - compiler: gcc-6.3.0-posix
+      generator: "MinGW Makefiles"
+      cxx_path: 'C:\mingw-w64\i686-6.3.0-posix-dwarf-rt_v5-rev1\mingw32\bin'
+
 configuration:
-#  - Release
   - Debug
 
 build:
   verbosity: minimal
 
-artifacts:
-  - path: '_build/Testing/Temporary/*'
-    name: test_results
-
-before_build:
+install:
 - ps: |
-    Write-Output "Configuration: $env:CONFIGURATION"
-    Write-Output "Platform: $env:PLATFORM"
-    $generator = switch ($env:TOOLSET)
-    {
-        "v140" {"Visual Studio 14 2015"}
-        "v120" {"Visual Studio 12 2013"}
-        "v110" {"Visual Studio 11 2012"}
-        "v100" {"Visual Studio 10 2010"}
+    Write-Output "Compiler: $env:compiler"
+    Write-Output "Generator: $env:generator"
+    if (-not (Test-Path env:APPVEYOR_PULL_REQUEST_NUMBER)) {
+      Write-Output "This is *NOT* a pull request build"
+    } else {
+      Write-Output "This is a pull request build"
+      if (-not (Test-Path env:enabled_on_pr) -or $env:enabled_on_pr -ne "yes") {
+        Write-Output "PR builds are *NOT* explicitly enabled"
+      }
     }
-    if ($env:PLATFORM -eq "x64")
-    {
-        $generator = "$generator Win64"
+
+    # git bash conflicts with MinGW makefiles
+    if ($env:generator -eq "MinGW Makefiles") {
+        $env:path = $env:path.replace("C:\Program Files\Git\usr\bin;", "")
+        if ($env:cxx_path -ne "") {
+            $env:path += ";$env:cxx_path"
+        }
     }
 
 build_script:
 - ps: |
-    if (($env:TOOLSET -eq "v100") -and ($env:PLATFORM -eq "x64"))
-    {
-        return
+    # Only enable some builds for pull requests, the AppVeyor queue is too long.
+    if ((Test-Path env:APPVEYOR_PULL_REQUEST_NUMBER) -And (-not (Test-Path env:enabled_on_pr) -or $env:enabled_on_pr -ne "yes")) {
+      return
     }
     md _build -Force | Out-Null
     cd _build
 
-    & cmake -G "$generator" -DCMAKE_CONFIGURATION_TYPES="Debug;Release" -Dgtest_build_tests=ON -Dgtest_build_samples=ON -Dgmock_build_tests=ON ..
+    $conf = if ($env:generator -eq "MinGW Makefiles") {"-DCMAKE_BUILD_TYPE=$env:configuration"} else {"-DCMAKE_CONFIGURATION_TYPES=Debug;Release"}
+    # Disable test for MinGW (gtest tests fail, gmock tests can not build)
+    $gtest_build_tests = if ($env:generator -eq "MinGW Makefiles") {"-Dgtest_build_tests=OFF"} else {"-Dgtest_build_tests=ON"}
+    $gmock_build_tests = if ($env:generator -eq "MinGW Makefiles") {"-Dgmock_build_tests=OFF"} else {"-Dgmock_build_tests=ON"}
+    & cmake -G "$env:generator" $conf -Dgtest_build_samples=ON $gtest_build_tests $gmock_build_tests ..
     if ($LastExitCode -ne 0) {
         throw "Exec: $ErrorMessage"
     }
-    & cmake --build . --config $env:CONFIGURATION
+    $cmake_parallel = if ($env:generator -eq "MinGW Makefiles") {"-j2"} else  {"/m"}
+    & cmake --build . --config $env:configuration -- $cmake_parallel
     if ($LastExitCode -ne 0) {
         throw "Exec: $ErrorMessage"
     }
 
+
+skip_commits:
+  files:
+    - '**/*.md'
+
 test_script:
 - ps: |
-    if (($env:Toolset -eq "v100") -and ($env:PLATFORM -eq "x64"))
-    {
-        return
+    # Only enable some builds for pull requests, the AppVeyor queue is too long.
+    if ((Test-Path env:APPVEYOR_PULL_REQUEST_NUMBER) -And (-not (Test-Path env:enabled_on_pr) -or $env:enabled_on_pr -ne "yes")) {
+      return
     }
-
-    & ctest -C $env:CONFIGURATION --output-on-failure
+    if ($env:generator -eq "MinGW Makefiles") {
+        return # No test available for MinGW
+    }
+    & ctest -C $env:configuration --timeout 600 --output-on-failure
     if ($LastExitCode -ne 0) {
         throw "Exec: $ErrorMessage"
     }
+
+artifacts:
+  - path: '_build/CMakeFiles/*.log'
+    name: logs
+  - path: '_build/Testing/**/*.xml'
+    name: test_results