Fix linux CMake build

Not tested: Cross compiling, might need to be implemented into CMakeLists

CMakeLists.txt

@@ -326,8 +326,6 @@ add_executable(clonk WIN32 MACOSX_BUNDLE
 
 add_executable(c4group
 	group/c4group_ng.cpp
-	engine/src/C4Config.cpp
-	engine/sec/C4ConfigShareware.cpp
 	engine/src/C4Group.cpp
 	engine/src/C4InputValidation.cpp
 	engine/sec/C4SecurityCertificates.cpp
@@ -606,6 +604,17 @@ target_link_libraries(c4group
 	${OPENSSL}
 )
 
+include(CheckCXXCompilerFlag)
+CHECK_CXX_COMPILER_FLAG("-std=gnu++0x" USE_GCC_STD_0X)
+if(USE_GCC_STD_0X)
+	list(APPEND OC_CXX_FLAGS "-std=gnu++0x")
+endif()
+include(CheckCXXSourceCompiles)
+set(CMAKE_REQUIRED_FLAGS ${OC_CXX_FLAGS})
+CHECK_CXX_SOURCE_COMPILES("void f(struct D&&); int main() { return 0; }" HAVE_RVALUE_REF)
+
 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/config.h.cmake ${CMAKE_CURRENT_BINARY_DIR}/config.h)
 add_definitions(-DHAVE_CONFIG_H)
 
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OC_CXX_FLAGS}" CACHE STRING "C++ compiler flags" FORCE)
+

config.h.cmake

@@ -178,3 +178,7 @@
 
 /* compile with debug options */
 #cmakedefine _DEBUG
+
+/* Define to 1 if rvalue references are supported */
+#cmakedefine HAVE_RVALUE_REF
+

engine/src/C4Config.cpp

@@ -456,7 +456,7 @@ BOOL C4Config::Load(BOOL forceWorkingDirectory, const char *szConfigFile)
 					StdStrBuf filename(getenv("HOME"));
 					if (filename) { filename += "/"; }
 					filename += ".clonk/" C4ENGINENICK;
-					CreateDirectory(filename.getData());
+					CreatePath(filename.getData());
 					}
 #endif
 				// Buggy StdCompiler crashes when compiling a Null-StdStrBuf

standard/inc/Standard.h

@@ -104,11 +104,6 @@ typedef __int32 intptr_t;
 #define ALLOW_TEMP_TO_REF(ClassName)
 #endif
 
-#if defined(__GXX_EXPERIMENTAL_CXX0X__) || (defined(__GNUC__) && ((__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)))
-// Another temporary-to-reference-fix: this time using C++0x's rvalue references
-#define HAVE_RVALUE_REF
-#endif
-
 #ifdef HAVE_RVALUE_REF
 #	define RREF &&
 #else