Add GitHub actions build config.

.github/workflows/build.yml

@@ -0,0 +1,33 @@
+name: Build
+on: push
+jobs:
+   build:
+      runs-on: ${{ matrix.os }}
+      strategy:
+         fail-fast: false
+         matrix:
+            cxx:
+               - clang++
+               - cl.exe
+               - g++
+            include:
+               - os: ubuntu-18.04
+                 cxx: clang++
+                 run: "true"
+               - os: ubuntu-18.04
+                 cxx: g++
+                 run: "true"
+               - os: windows-2019
+                 cxx: cl.exe
+                 run: '"C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Auxiliary\Build\vcvars64.bat"'
+      name: ${{ matrix.os }} - ${{ matrix.cxx }}
+      steps:
+         - uses: actions/checkout@v1
+         - uses: actions/setup-python@v1
+           with:
+              python-version: 2.x
+         - run: pip install scons
+         - run: ${{ matrix.run }}
+         - run: scons
+           env:
+              CXX: ${{ matrix.cxx }}

Build/NTEnvironment.py

@@ -15,9 +15,14 @@ def __init__(self, **kw):
 
    def ConfigureCompiler(self):
       cxx = self.WhereIs(self['CXX'])
-      cxx_bin = os.path.basename(cxx).lower()
+      cxx = os.path.normpath(cxx)
+      cxx_bin = os.path.basename(cxx)
       cxx_dir = os.path.dirname(cxx)
 
+      print "XXX: " + cxx
+      print "XXX: " + cxx_bin
+      print "XXX: " + cxx_dir
+
       if cxx_bin.startswith("cl"):
          common = cxx_dir + "\..\.."
          if os.path.exists(common + "\Common\IDE"):