fixed more windows weirdness

scripts/common.ps1

@@ -42,7 +42,7 @@ function Invoke-Call {
         [scriptblock]$ScriptBlock,
         [string]$ErrorAction = "Stop"
     )
-    & @ScriptBlock | ForEach-Object { "$_" }
+    & @ScriptBlock *>&1 | ForEach-Object { "$_" }
     if (($lastexitcode -ne 0) -and $ErrorAction -eq "Stop") {
         Write-Error "Command $ScriptBlock exited with $lastexitcode."
         exit $lastexitcode

scripts/run_cmake.ps1

@@ -14,19 +14,22 @@
 
 . ${PSScriptRoot}\common.ps1
 
+# Delete and re-create build folder
 Remove-Item build -Recurse -ErrorAction Ignore
 New-Item -ItemType Directory -Force -Path build | Out-Null
 Push-Location build
 
+# load Vistual Studio environment variables
 Invoke-CmdScript "C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\Common7\Tools\VsDevCmd.bat" -arch=amd64 -host_arch=amd64
 
+# call CMake
 Invoke-Call -ScriptBlock {
   cmake ..\llvm -G Ninja -DCMAKE_BUILD_TYPE=Release  `
          -D LLVM_ENABLE_PROJECTS="clang;clang-tools-extra" `
          -D LLVM_ENABLE_ASSERTIONS=ON `
          -DLLVM_LIT_ARGS="-v --xunit-xml-output test-results.xml" `
          -D LLVM_ENABLE_DIA_SDK=OFF
-} -ErrorAction Stop
+}
 
 # LLVM_ENABLE_DIA_SDK=OFF is a workaround to make the tests pass.
 # see https://bugs.llvm.org/show_bug.cgi?id=44151

scripts/run_ninja.ps1

@@ -18,8 +18,13 @@ param(
 
 . ${PSScriptRoot}\common.ps1
 
+# cd into build folder
 Push-Location build
 
-Invoke-Call -ScriptBlock {ninja $target} -ErrorAction Stop
+# load Visual Studio environment variables
+Invoke-CmdScript "C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\Common7\Tools\VsDevCmd.bat" -arch=amd64 -host_arch=amd64
+
+# call ninja
+Invoke-Call -ScriptBlock {ninja $target}
 
 Pop-Location