Don't build Embree with VC 11, fix VC 12 build

Author: dictoon

BuildAll.bat

@@ -388,6 +388,12 @@ echo [12/13] Building SeExpr...
 REM ===============================================================================
 
 :embree
+
+if [platform] == [vc11] (
+    echo [13/13] Skipping Embree ^(not supported with Visual Studio 2012^)...
+    goto end_embree
+)
+
 echo [13/13] Building Embree...
 
     mkdir %root%build\%platform%\embree-debug 2>nul
@@ -401,15 +407,21 @@ echo [13/13] Building Embree...
     mkdir %root%build\%platform%\embree-release 2>nul
     pushd %root%build\%platform%\embree-release
         echo === Embree (Release) ========================================================== > BUILDLOG.txt
-        REM The CMake arguments
-        REM   -DEMBREE_IGNORE_CMAKE_CXX_FLAGS=OFF -DCMAKE_CXX_FLAGS="-d2SSAOptimizer-"
-        REM are required to work around a bug in the new SSA optimizer introduced in VS 2015:
-        REM https://github.com/embree/embree/issues/157#issuecomment-334696351
-        cmake -G %generator% -DCMAKE_BUILD_TYPE=Release -DEMBREE_STATIC_LIB=ON -DEMBREE_TUTORIALS=OFF -DEMBREE_RAY_MASK=ON -DEMBREE_TASKING_SYSTEM=INTERNAL -DEMBREE_ISPC_SUPPORT=OFF -DEMBREE_IGNORE_CMAKE_CXX_FLAGS=OFF -DCMAKE_CXX_FLAGS="-d2SSAOptimizer-" -DCMAKE_INSTALL_PREFIX=%root%stage\%platform%\embree-release %src%\embree %redirect%
+        if [platform] == [vc14] (
+            REM The CMake argument
+            REM   -DCMAKE_CXX_FLAGS="-d2SSAOptimizer-"
+            REM is required to work around a bug in the new SSA optimizer introduced in VS 2015:
+            REM https://github.com/embree/embree/issues/157#issuecomment-334696351
+            cmake -G %generator% -DCMAKE_BUILD_TYPE=Release -DEMBREE_STATIC_LIB=ON -DEMBREE_TUTORIALS=OFF -DEMBREE_RAY_MASK=ON -DEMBREE_TASKING_SYSTEM=INTERNAL -DEMBREE_ISPC_SUPPORT=OFF -DCMAKE_CXX_FLAGS="-d2SSAOptimizer-" -DCMAKE_INSTALL_PREFIX=%root%stage\%platform%\embree-release %src%\embree %redirect%
+        ) else (
+            cmake -G %generator% -DCMAKE_BUILD_TYPE=Release -DEMBREE_STATIC_LIB=ON -DEMBREE_TUTORIALS=OFF -DEMBREE_RAY_MASK=ON -DEMBREE_TASKING_SYSTEM=INTERNAL -DEMBREE_ISPC_SUPPORT=OFF -DCMAKE_INSTALL_PREFIX=%root%stage\%platform%\embree-release %src%\embree %redirect%
+        )
         devenv embree3.sln /build Release /project INSTALL %redirect%
         type BUILDLOG.txt >> %root%build\%platform%\BUILDLOG.txt
     popd
 
+:end_embree
+
 REM ===============================================================================
 
 :done