debug: add a logging module

include/log.h

@@ -0,0 +1,12 @@
+#ifndef LOGH_
+#define LOGH_
+
+#include <stdio.h>
+
+void log_init(FILE* fd);
+void log_puts(const char* msg);
+void log_printf(const char* fmt, ...);
+// NOLINTNEXTLINE(readability-identifier-length)
+void log_perror(const char* s);
+
+#endif

include/macros.h

@@ -1,3 +1,6 @@
+#ifndef MACROSH_
+#define MACROSH_
+
 // Do we just replace the compiler with clang??
 #if defined(__clang__)
 #define NULLABLE _Nullable
@@ -16,3 +19,5 @@
 #else
 #define UNULLABLE
 #endif
+
+#endif