diff --git a/log.c b/log.c
new file mode 100644
index 0000000..2938a60
--- /dev/null
+++ b/log.c
@@ -0,0 +1,54 @@
+/* SPDX-License-Identifier: Apache-2.0 */
+
+#ifndef CPER_LOG_H
+#define CPER_LOG_H
+
+#include <stdarg.h>
+
+#ifndef CPER_NO_STDIO
+#include <stdio.h>
+#endif
+
+enum {
+	CPER_LOG_NONE,
+	CPER_LOG_STDIO,
+	CPER_LOG_CUSTOM,
+} log_type = CPER_LOG_NONE;
+
+static void (*log_custom_fn)(const char *, va_list);
+
+void cper_print_log(const char *fmt, ...)
+{
+	va_list ap;
+
+	va_start(ap, fmt);
+
+	switch (log_type) {
+	case CPER_LOG_NONE:
+		break;
+	case CPER_LOG_STDIO:
+#ifndef CPER_NO_STDIO
+		vfprintf(stderr, fmt, ap);
+		fputs("\n", stderr);
+#endif
+		break;
+	case CPER_LOG_CUSTOM:
+		log_custom_fn(fmt, ap);
+		break;
+	}
+
+	va_end(ap);
+}
+
+void cper_set_log_stdio()
+{
+	log_type = CPER_LOG_STDIO;
+}
+
+void cper_set_log_custom(void (*fn)(const char *, va_list))
+{
+	log_type = CPER_LOG_CUSTOM;
+	log_custom_fn = fn;
+}
+
+#endif /* CPER_LOG_H */