Add configuration option to the base/rom extension to make the toolchain (ARMCC/GCCE) known to the preprocessor stage of romb build.
<?xml version="1.0" encoding="Windows-1252"?>
<VisualStudioPropertySheet
ProjectType="Visual C++"
Version="8.00"
Name="amd64"
OutputDirectory="$(SolutionDir)\amd64\"
IntermediateDirectory="$(SolutionDir)$(PlatformName)-temp-$(ConfigurationName)\$(ProjectName)\"
>
<Tool
Name="VCCLCompilerTool"
AdditionalOptions="/USECL:MS_OPTERON /GS-"
PreprocessorDefinitions="_WIN64;_M_X64"
/>
<Tool
Name="VCLinkerTool"
TargetMachine="17"
/>
<UserMacro
Name="PythonExe"
Value="$(HOST_PYTHON)"
/>
</VisualStudioPropertySheet>