Add build system scaffolding and libc headers

1 files changed, 18 insertions, 0 deletions

diff --git a/include/err.h b/include/err.h
new file mode 100644
index 00000000..f08005f7
--- /dev/null
+++ b/include/err.h
@@ -0,0 +1,18 @@
+#ifndef __ERR_H
+#define __ERR_H
+
+#include <stdarg.h>
+
+_Noreturn void err(int eval, const char *fmt, ...);
+_Noreturn void errx(int eval, const char *fmt, ...);
+
+void warn(const char *fmt, ...);
+void warnx(const char *fmt, ...);
+
+_Noreturn void verr(int eval, const char *fmt, va_list args);
+_Noreturn void verrx(int eval, const char *fmt, va_list args);
+
+void vwarn(const char *fmt, va_list args);
+void vwarnx(const char *fmt, va_list args);
+
+#endif