Index: include/stdio.h
===================================================================
--- include/stdio.h
+++ include/stdio.h
@@ -352,44 +352,8 @@
 FILE	*open_memstream(char **, size_t *);
 int	 renameat(int, const char *, int, const char *);
 int	 vdprintf(int, const char * __restrict, __va_list);
-
-/*
- * Every programmer and his dog wrote functions called getline() and dprintf()
- * before POSIX.1-2008 came along and decided to usurp the names, so we
- * don't prototype them by default unless one of the following is true:
- *   a) the app has requested them specifically by defining _WITH_GETLINE or
- *      _WITH_DPRINTF, respectively
- *   b) the app has requested a POSIX.1-2008 environment via _POSIX_C_SOURCE
- *   c) the app defines a GNUism such as _BSD_SOURCE or _GNU_SOURCE
- */
-#ifndef _WITH_GETLINE
-#if defined(_BSD_SOURCE) || defined(_GNU_SOURCE)
-#define	_WITH_GETLINE
-#elif defined(_POSIX_C_SOURCE)
-#if _POSIX_C_SOURCE >= 200809
-#define	_WITH_GETLINE
-#endif
-#endif
-#endif
-
-#ifdef _WITH_GETLINE
 ssize_t	 getline(char ** __restrict, size_t * __restrict, FILE * __restrict);
-#endif
-
-#ifndef _WITH_DPRINTF
-#if defined(_BSD_SOURCE) || defined(_GNU_SOURCE)
-#define	_WITH_DPRINTF
-#elif defined(_POSIX_C_SOURCE)
-#if _POSIX_C_SOURCE >= 200809
-#define	_WITH_DPRINTF
-#endif
-#endif
-#endif
-
-#ifdef _WITH_DPRINTF
 int	 (dprintf)(int, const char * __restrict, ...);
-#endif
-
 #endif /* __POSIX_VISIBLE >= 200809 */
 
 /*
Index: lib/libc/stdio/getline.3
===================================================================
--- lib/libc/stdio/getline.3
+++ lib/libc/stdio/getline.3
@@ -34,7 +34,6 @@
 .Sh LIBRARY
 .Lb libc
 .Sh SYNOPSIS
-.Fd "#define _WITH_GETLINE"
 .In stdio.h
 .Ft ssize_t
 .Fn getdelim "char ** restrict linep" "size_t * restrict linecapp" "int delimiter" " FILE * restrict stream"
@@ -97,34 +96,6 @@
 	fwrite(line, linelen, 1, stdout);
 free(line);
 .Ed
-.Sh COMPATIBILITY
-Many application writers used the name
-.Va getline
-before the
-.Fn getline
-function was introduced in
-.St -p1003.1 ,
-so a prototype is not provided by default in order to avoid
-compatibility problems.
-Applications that wish to use the
-.Fn getline
-function described herein should either request a strict
-.St -p1003.1-2008
-environment by defining the macro
-.Dv _POSIX_C_SOURCE
-to the value 200809 or greater, or by defining the macro
-.Dv _WITH_GETLINE ,
-prior to the inclusion of
-.In stdio.h .
-For compatibility with GNU libc, defining either
-.Dv _BSD_SOURCE
-or
-.Dv _GNU_SOURCE
-prior to the inclusion of
-.In stdio.h
-will also make
-.Fn getline
-available.
 .Sh ERRORS
 These functions may fail if:
 .Bl -tag -width Er
Index: lib/libc/stdio/printf.3
===================================================================
--- lib/libc/stdio/printf.3
+++ lib/libc/stdio/printf.3
@@ -42,7 +42,6 @@
 .Sh LIBRARY
 .Lb libc
 .Sh SYNOPSIS
-.Fd "#define _WITH_DPRINTF"
 .In stdio.h
 .Ft int
 .Fn printf "const char * restrict format" ...
@@ -715,34 +714,6 @@
 }
 .Ed
 .Sh COMPATIBILITY
-Many application writers used the name
-.Va dprintf
-before the
-.Fn dprintf
-function was introduced in
-.St -p1003.1 ,
-so a prototype is not provided by default in order to avoid
-compatibility problems.
-Applications that wish to use the
-.Fn dprintf
-function described herein should either request a strict
-.St -p1003.1-2008
-environment by defining the macro
-.Dv _POSIX_C_SOURCE
-to the value 200809 or greater, or by defining the macro
-.Dv _WITH_DPRINTF ,
-prior to the inclusion of
-.In stdio.h .
-For compatibility with GNU libc, defining either
-.Dv _BSD_SOURCE
-or
-.Dv _GNU_SOURCE
-prior to the inclusion of
-.In stdio.h
-will also make
-.Fn dprintf
-available.
-.Pp
 The conversion formats
 .Cm \&%D , \&%O ,
 and