Add log framework

v0/log.h

@@ -0,0 +1,22 @@
+/**
+ * Contains the logging framework used for logging errors during compilation.
+ */
+#ifndef LOG_H
+#define LOG_H
+
+/**
+ * A method that can log an error.
+ */
+typedef void LogError(const char* msg);
+
+/**
+ * Sets the destination for log errors.
+ */
+void log_set_output(LogError* destination);
+
+/**
+ * Logs an error to the destination.
+ */
+void log_error(const char* msg);
+
+#endif