New logging system, currently not used by anything.

src/include/86box/log.h

@@ -0,0 +1,46 @@
+/*
+ * 86Box	A hypervisor and IBM PC system emulator that specializes in
+ *		running old operating systems and software designed for IBM
+ *		PC systems and compatibles from 1981 through fairly recent
+ *		system designs based on the PCI bus.
+ *
+ *		This file is part of the 86Box distribution.
+ *
+ *		Main include file for the application.
+ *
+ *
+ *
+ * Authors:	Miran Grca, <mgrca8@gmail.com>
+ *		Fred N. van Kempen, <decwiz@yahoo.com>
+ *
+ *		Copyright 2021 Miran Grca.
+ *		Copyright 2021 Fred N. van Kempen.
+ */
+#ifndef EMU_LOG_H
+# define EMU_LOG_H
+
+#ifndef RELEASE_BUILD
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Function prototypes. */
+extern void	log_set_suppr_seen(void *priv, int suppr_seen);
+extern void	log_set_dev_name(void *priv, char *dev_name);
+#ifdef HAVE_STDARG_H
+extern void	log_out(void *priv, const char *fmt, va_list);
+extern void	log_fatal(void *priv, const char *fmt, ...);
+#endif
+extern void *	log_open(char *dev_name);
+extern void	log_close(void *priv);
+
+#ifdef __cplusplus
+}
+#endif
+
+#else
+#define	log_fatal(priv, fmt, ...) fatal(fmt, ...)
+#endif	/*RELEASE_BUILD*/
+
+#endif	/*EMU_LOG_H*/