new file mode 100644
--- /dev/null
+++ b/src/osdef1.h.in
@@ -0,0 +1,137 @@
+/* autoconf cannot fiddle out declarations. Use our homebrewn tools. (jw) */
+/*
+ * Declarations that may cause conflicts belong here so that osdef.sh
+ * can clean out the forest. Everything else belongs in os_unix.h
+ *
+ * How this works:
+ * - This file contains all unix prototypes that Vim might need.
+ * - The shell script osdef.sh is executed at compile time to remove all the
+ *   prototypes that are in an include file. This results in osdef.h.
+ * - osdef.h is included in vim.h.
+ *
+ * sed cannot always handle so many commands, this is file 1 of 2
+ */
+
+extern int	printf __ARGS((char *, ...));
+extern int	fprintf __ARGS((FILE *, char *, ...));
+extern int	sprintf __ARGS((char *, char *, ...));
+extern int	sscanf __ARGS((char *, char *, ...));
+#ifndef fopen	/* could be redefined to fopen64() */
+extern FILE	*fopen __ARGS((const char *, const char *));
+#endif
+extern int	fclose __ARGS((FILE *));
+extern int	fseek __ARGS((FILE *, long, int));
+#ifdef HAVE_FSEEKO
+extern int	fseeko __ARGS((FILE *, off_t, int));
+#endif
+extern long	ftell __ARGS((FILE *));
+#ifdef HAVE_FTELLO
+extern off_t	ftello __ARGS((FILE *));
+#endif
+extern void	rewind __ARGS((FILE *));
+extern int	fread __ARGS((char *, int, int, FILE *));
+extern int	fwrite __ARGS((char *, int, int, FILE *));
+extern int	fputs __ARGS((char *, FILE *));
+#ifndef ferror	/* let me say it again: "macros should never have prototypes" */
+extern int	ferror __ARGS((FILE *));
+#endif
+extern int	fflush __ARGS((FILE *));
+#if defined(sun) || defined(_SEQUENT_)
+/* used inside of stdio macros getc(), puts(), putchar()... */
+extern int	_flsbuf __ARGS((int, FILE *));
+extern int	_filbuf __ARGS((FILE *));
+#endif
+
+#if !defined(HAVE_SELECT)
+struct pollfd;			/* for poll __ARGS */
+extern int	poll __ARGS((struct pollfd *, long, int));
+#endif
+
+#ifdef HAVE_MEMSET
+extern void	*memset __ARGS((void *, int, size_t));
+#endif
+#ifdef HAVE_BCMP
+extern int	bcmp __ARGS((void *, void *, size_t));
+#endif
+#ifdef HAVE_MEMCMP
+extern int	memcmp __ARGS((const void *, const void *, size_t));
+#endif
+#ifdef HAVE_STRPBRK
+extern char	*strpbrk __ARGS((const char *, const char *));
+#endif
+#ifdef USEBCOPY
+extern void	bcopy __ARGS((char *, char *, int));
+#else
+# ifdef USEMEMCPY
+extern void	memcpy __ARGS((char *, char *, int));
+# else
+#  ifdef USEMEMMOVE
+extern void	memmove __ARGS((char *, char *, int));
+#  endif
+# endif
+#endif
+/* used inside of FD_ZERO macro: */
+extern void	bzero __ARGS((void *, size_t));
+#ifdef HAVE_SETSID
+extern pid_t	setsid __ARGS((void));
+#endif
+#ifdef HAVE_SETPGID
+extern int	setpgid __ARGS((pid_t, pid_t));
+#endif
+#ifdef HAVE_STRTOL
+extern int	strtol __ARGS((char *, char **, int));
+#endif
+#ifdef HAVE_STRFTIME
+extern size_t	strftime __ARGS((char *, size_t, char *, struct tm *));
+#endif
+#ifdef HAVE_STRCASECMP
+extern int	strcasecmp __ARGS((char *, char *));
+#endif
+#ifdef HAVE_STRNCASECMP
+extern int	strncasecmp __ARGS((char *, char *, size_t));
+#endif
+#ifndef strdup
+extern char	*strdup __ARGS((const char *));
+#endif
+extern int	atoi __ARGS((char *));
+extern int	atol __ARGS((char *));
+
+#ifndef USE_SYSTEM
+extern int	fork __ARGS((void));
+extern int	execvp __ARGS((const char *, const char **));
+extern int	wait __ARGS((int *)); /* will this break things ...? */
+extern int	waitpid __ARGS((pid_t, int *, int));
+#endif
+
+extern int	toupper __ARGS((int));
+extern int	tolower __ARGS((int));
+
+extern RETSIGTYPE (*signal __ARGS((int, RETSIGTYPE (*func) SIGPROTOARG))) __ARGS(SIGPROTOARG);
+#ifdef HAVE_SIGSET
+extern RETSIGTYPE (*sigset __ARGS((int, RETSIGTYPE (*func) SIGPROTOARG))) __ARGS(SIGPROTOARG);
+#endif
+
+#if defined(HAVE_SETJMP_H)
+# ifdef HAVE_SIGSETJMP
+extern int	sigsetjmp __ARGS((sigjmp_buf, int));
+extern void	siglongjmp __ARGS((sigjmp_buf, int));
+# else
+extern int	setjmp __ARGS((jmp_buf));
+extern void	longjmp __ARGS((jmp_buf, int));
+# endif
+#endif
+
+extern int	kill __ARGS((int, int));
+
+extern int	access __ARGS((char *, int));
+extern int	fsync __ARGS((int));
+extern int	fchown __ARGS((int, int, int));
+#if defined(HAVE_GETCWD) && !defined(sun)
+extern char	*getcwd __ARGS((char *, int));
+#else
+extern char	*getwd __ARGS((char *));
+#endif
+#ifndef __alpha	/* suggested by Campbell */
+extern int	ioctl __ARGS((int, int, ...));
+#endif
+extern int	chmod __ARGS((const char *, mode_t));