added partial VFS support - enough to read static data from any source

ExternalLibs/ttvfs/CMakeLists.txt

@@ -0,0 +1,64 @@
+
+option(TTVFS_LARGEFILE_SUPPORT "Enable support for files > 4 GB? (experimental!)" FALSE)
+option(TTVFS_IGNORE_CASE "Enable full case-insensitivity even on case-sensitive OSes like Linux and alike?" FALSE)
+
+# Be sure to copy this part to your root CMakeLists.txt if you prefer to use CMake for configuring
+# instead of editing the headers directly!
+# If you edit the headers, this is not necessary.
+if(TTVFS_LARGEFILE_SUPPORT)
+    add_definitions("-DVFS_LARGEFILE_SUPPORT")
+endif()
+if(TTVFS_IGNORE_CASE)
+    add_definitions("-DVFS_IGNORE_CASE")
+endif()
+# --snip--
+
+
+# compiler specific things
+if(MSVC)
+    # MSVC builds require installed runtime library by default
+    option(TTVFS_STATIC_LIB "Link as static library without runtime dependencies (Note: To get rid of this setting with MSVC, the cmake cache must be cleared)" FALSE)
+    add_definitions("/GR-") # run-time type info (RTTI) not required
+    
+    if(TTVFS_STATIC_LIB)
+        # this is ugly - hackfix compiler flags
+        foreach(flag_var CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
+            if(${flag_var} MATCHES "/MD")
+                string(REGEX REPLACE "/MD" "/MT" ${flag_var} "${${flag_var}}")
+            endif(${flag_var} MATCHES "/MD")
+            if(${flag_var} MATCHES "/MDd")
+                string(REGEX REPLACE "/MDd" "/MTd" ${flag_var} "${${flag_var}}")
+            endif(${flag_var} MATCHES "/MDd")
+        endforeach()
+        
+        # hackfix linker flags - no idea why, but MSVC will produce linker errors otherwise
+        set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} /NODEFAULTLIB")
+        set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} /NODEFAULTLIB:msvcrt.lib,msvcrtd.lib") # not sure if this is correct
+        set(CMAKE_EXE_LINKER_FLAGS    "${CMAKE_EXE_LINKER_FLAGS} /NODEFAULTLIB:msvcrt.lib,msvcrtd.lib")
+    endif()
+endif()
+
+
+set(ttvfs_SRC
+    VFS.h
+    VFSAtomic.cpp
+    VFSAtomic.h
+    VFSDefines.h
+    VFSDir.cpp
+    VFSDir.h
+    VFSFile.cpp
+    VFSFile.h
+    VFSHelper.cpp
+    VFSHelper.h
+    VFSInternal.h
+    VFSLoader.cpp
+    VFSLoader.h
+    VFSSelfRefCounter.h
+    VFSTools.cpp
+    VFSTools.h
+)
+
+set(TTVFS_INCLUDE_DIRS ${CMAKE_CURRENT_SOURCE_DIR} CACHE STRING "ttvfs include directory - for external includers" FORCE)
+set(TTVFS_SRC_DIR ${CMAKE_CURRENT_SOURCE_DIR} CACHE STRING "ttvfs source directory - for external includers" FORCE)
+
+add_library(ttvfs ${ttvfs_SRC})