add clcache to Windows build

Author: Daniel Kroening

buildspec-windows.yml

@@ -6,6 +6,7 @@ phases:
       - choco install cyg-get -y --no-progress
       - cyg-get bash patch bison flex make wget perl
       - nuget install clcache -OutputDirectory "c:\tools" -ExcludeVersion
+      - cmd /c 'echo %HOME%'
 
   build:
     commands:
@@ -15,14 +16,21 @@ phases:
 
       - |
         $env:Path = "C:\tools\cygwin\bin;c:\tools\clcache\clcache-4.1.0;$env:Path"
+        $env:CLCACHE_DIR = "C:\clcache"
         cmd /c 'call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" x64 && bash -c "make CXX=clcache.exe -j4 -C src BUILD_ENV=MSVC" '
         cmd /c 'call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" x64 && bash -c "make CXX=clcache.exe -j4 -C unit all BUILD_ENV=MSVC" '
 
       - |
         $env:Path = "C:\tools\cygwin\bin;c:\tools\clcache\clcache-4.1.0;$env:Path"
+        $env:CLCACHE_DIR = "C:\clcache"
         cmd /c 'call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" x64 && bash -c "make -j4 -C jbmc/src setup-submodules" && bash -c "make CXX=clcache.exe -j4 -C jbmc/src BUILD_ENV=MSVC" '
         cmd /c 'call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" x64 && bash -c "make CXX=clcache.exe -j4 -C jbmc/unit all BUILD_ENV=MSVC" '
 
+      - |
+        $env:Path = "C:\tools\cygwin\bin;c:\tools\clcache\clcache-4.1.0;$env:Path"
+        $env:CLCACHE_DIR = "C:\clcache"
+        cmd /c 'clcache -s'
+
   post_build:
     commands:
       - |
@@ -73,3 +81,4 @@ artifacts:
 
 cache:
   paths:
+    - 'c:\clcache'