diff --git a/ShaderCompile/ShaderCompile.cpp b/ShaderCompile/ShaderCompile.cpp
index 14ee664..c47f142 100644
--- a/ShaderCompile/ShaderCompile.cpp
+++ b/ShaderCompile/ShaderCompile.cpp
@@ -876,29 +876,6 @@ void CWorkerAccumState<TMutexType>::RangeFinished()
 	TryToPackageData( m_iEndCommand - 1 );
 }
 
-template <size_t N>
-static __forceinline void PrepareFlagsForSubprocess( char ( &pBuf )[N] )
-{
-	if ( gFlags & D3DCOMPILE_PARTIAL_PRECISION )
-		strcat_s( pBuf, "/Gpp " );
-
-	if ( gFlags & D3DCOMPILE_SKIP_VALIDATION )
-		strcat_s( pBuf, "/Vd " );
-
-	if ( gFlags & D3DCOMPILE_NO_PRESHADER )
-		strcat_s( pBuf, "/Op " );
-
-	if ( gFlags & D3DCOMPILE_AVOID_FLOW_CONTROL )
-		strcat_s( pBuf, "/Gfa " );
-	else if ( gFlags & D3DCOMPILE_PREFER_FLOW_CONTROL )
-		strcat_s( pBuf, "/Gfp " );
-
-	if ( gFlags & D3DCOMPILE_SKIP_OPTIMIZATION )
-		strcat_s( pBuf, "/Od" );
-
-	V_StrTrim( pBuf );
-}
-
 template <Threading::Mutex TMutexType>
 void CWorkerAccumState<TMutexType>::ExecuteCompileCommandThreaded( CfgProcessor::ComboHandle hCombo )
 {
@@ -1557,6 +1534,8 @@ int main( int argc, const char* argv[] )
 	cmdLine.add( "", false, 0, 0, "Directs the compiler to not use flow-control constructs where possible", "/Gfa", "-no-flow-control" );
 	cmdLine.add( "", false, 0, 0, "Directs the compiler to use flow-control constructs where possible", "/Gfp", "-prefer-flow-control" );
 	cmdLine.add( "", false, 0, 0, "Disables shader optimization", "/Od", "-disable-optimization" );
+	cmdLine.add( "", false, 0, 0, "Enable debugging information", "/Zi", "-debug-info" );
+	cmdLine.add( "1", false, 1, 0, "Set optimization level (0-3)", "/O", "-optimize" );
 
 	cmdLine.parse( argc, argv );
 
@@ -1595,6 +1574,30 @@ int main( int argc, const char* argv[] )
 	if ( cmdLine.isSet( "/Od" ) )
 		gFlags |= D3DCOMPILE_SKIP_OPTIMIZATION;
 
+	if ( cmdLine.isSet( "/Zi" ) )
+		gFlags |= D3DCOMPILE_DEBUG;
+
+	int optLevel = 1;
+	cmdLine.get( "/O" )->getInt( optLevel );
+	switch ( optLevel )
+	{
+	case 0:
+		gFlags |= D3DCOMPILE_OPTIMIZATION_LEVEL0;
+		break;
+	default:
+		std::cout << "Unknown optimization level " << optLevel << ", using default!" << std::endl;
+		[[fallthrough]];
+	case 1:
+		gFlags |= D3DCOMPILE_OPTIMIZATION_LEVEL1;
+		break;
+	case 2:
+		gFlags |= D3DCOMPILE_OPTIMIZATION_LEVEL2;
+		break;
+	case 3:
+		gFlags |= D3DCOMPILE_OPTIMIZATION_LEVEL3;
+		break;
+	}
+
 	std::vector<std::string> badOptions;
 	if ( !cmdLine.gotRequired( badOptions ) || cmdLine.lastArgs.size() != 1 )
 	{
diff --git a/ShaderCompile/strmanip.hpp b/ShaderCompile/strmanip.hpp
index 02a4fa9..1ba05ee 100644
--- a/ShaderCompile/strmanip.hpp
+++ b/ShaderCompile/strmanip.hpp
@@ -72,80 +72,9 @@ static inline std::_Smanip<int64_t> FormatTimeShort( int64_t i )
 	return { __FormatTime2, i };
 }
 
-static __forceinline bool PATHSEPARATOR( char c )
-{
-	return c == '\\' || c == '/';
-}
-
-static inline const char* V_GetFileExtension( const char* path )
-{
-	const char* src = path + ( strlen( path ) - 1 );
-
-	while ( src != path && *( src - 1 ) != '.' )
-		src--;
-
-	if ( src == path || PATHSEPARATOR( *src ) )
-		return nullptr; // no extension
-
-	return src;
-}
-
 static __forceinline bool V_IsAbsolutePath( const char* pStr )
 {
 	return ( pStr[0] && pStr[1] == ':' ) || pStr[0] == '/' || pStr[0] == '\\';
 }
 
-static inline void V_StripFilename( char* path )
-{
-	int length = static_cast<int>( strlen( path ) ) - 1;
-	if ( length <= 0 )
-		return;
-
-	while ( length > 0 && !PATHSEPARATOR( path[length] ) )
-		length--;
-
-	path[length] = 0;
-}
-
-static inline void V_FixSlashes( char* pname, char separator = '\\' )
-{
-	while ( *pname )
-	{
-		if ( *pname == '/' || *pname == '\\' )
-			*pname = separator;
-		pname++;
-	}
-}
-
-static inline void V_StrTrim( char* pStr )
-{
-	char* pSource = pStr;
-	char* pDest = pStr;
-
-	// skip white space at the beginning
-	while ( *pSource != 0 && isspace( *pSource ) )
-		pSource++;
-
-	// copy everything else
-	char* pLastWhiteBlock = nullptr;
-	while ( *pSource != 0 )
-	{
-		*pDest = *pSource++;
-		if ( isspace( *pDest ) )
-		{
-			if ( pLastWhiteBlock == nullptr )
-				pLastWhiteBlock = pDest;
-		}
-		else
-			pLastWhiteBlock = nullptr;
-		pDest++;
-	}
-	*pDest = 0;
-
-	// did we end in a whitespace block?
-	if ( pLastWhiteBlock != nullptr )
-		// yep; shorten the string
-		*pLastWhiteBlock = 0;
-}
-
 #endif // STRMANIP_HPP
\ No newline at end of file