More Emscripten build fixes

CMakeLists.txt

@@ -55,7 +55,7 @@ elseif(CMAKE_SYSTEM_NAME STREQUAL Emscripten)
 	set(PSEMEK_GL_LIBRARIES EGL)
 	set(PSEMEK_PACKAGE_AS_LIBRARY OFF CACHE INTERNAL "Build applications as shared libraries")
 	list(APPEND PSEMEK_DEFINITIONS "-DPSEMEK_GLES=1")
-	list(APPEND PSEMEK_CXX_FLAGS -sUSE_SDL=2)
+	list(APPEND PSEMEK_CXX_FLAGS -sUSE_SDL=2 -fexperimental-library)
 	# by default emcc doesn't produce catch clauses, but psemek is designed around exceptions
 	list(APPEND PSEMEK_CXX_FLAGS -sDISABLE_EXCEPTION_CATCHING=0)
 	if(CMAKE_BUILD_TYPE STREQUAL Debug)

libs/journal/source/event.cpp

@@ -8,8 +8,12 @@ namespace psemek::journal
 
 	std::string current_time()
 	{
+#ifndef __EMSCRIPTEN__
 		const auto now = std::chrono::system_clock::now();
 		return std::format("{:%FT%TZ}", now);
+#else
+		return "";
+#endif
 	}
 
 }