some improvements i think

stdfilesystems/build.cpp

@@ -0,0 +1,35 @@
+#include "helper.h"
+#include "c.h"
+#include "ld.h"
+#include "tier1/utlstring.h"
+
+ADD_DEPENDENCY_BUILD_FILE(tier0, "../tier0/build.cpp")
+ADD_DEPENDENCY_BUILD_FILE(tier1, "../tier1/build.cpp")
+
+CUtlVector<CUtlString> fs_CompiledFiles = {
+	"filesystem_libc.cpp",
+};
+
+DECLARE_BUILD_STAGE(filesystem_std)
+{
+	CProject_t compileProject = {};
+	LinkProject_t ldProject = {};
+	CUtlString szOutputProject = "";
+
+	compileProject.m_szName = "filesystem_std";
+	compileProject.files = fs_CompiledFiles;
+	compileProject.includeDirectories = {"../public"};
+	compileProject.bFPIC = true;
+	ldProject = ccompiler->Compile(&compileProject);
+
+	ldProject.linkType = ELINK_DYNAMIC_LIBRARY;
+	ldProject.libraryObjects = {
+		 GET_PROJECT_LIBRARY(tier0, "tier0"),
+		 GET_PROJECT_LIBRARY(tier1, "tier1"),
+	};
+	szOutputProject = linker->Link(&ldProject);
+
+	ADD_OUTPUT_OBJECT("fs", szOutputProject);
+
+	return 0;
+};