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authorUlrich Drepper <drepper@redhat.com>2001-01-08 08:50:37 +0000
committerUlrich Drepper <drepper@redhat.com>2001-01-08 08:50:37 +0000
commit9b2c75233e67af1943af87a4fd39c6b316064b1f (patch)
tree5cf54675b0067d9be0ee80e5f2d3e8fb2f3a180c /libio/bits/stdio.h
parentbf2c10ded6bd31d7b923408f099b32b549acb934 (diff)
downloadglibc-9b2c75233e67af1943af87a4fd39c6b316064b1f.tar.gz
Update.
2001-01-08 Ulrich Drepper <drepper@redhat.com> * libio/bits/stdio.h (printf): Define macro to map printf call to fprintf which gcc can optimize.
Diffstat (limited to 'libio/bits/stdio.h')
-rw-r--r--libio/bits/stdio.h9
1 files changed, 8 insertions, 1 deletions
diff --git a/libio/bits/stdio.h b/libio/bits/stdio.h
index 2522a3846e..0b4f614221 100644
--- a/libio/bits/stdio.h
+++ b/libio/bits/stdio.h
@@ -1,5 +1,5 @@
/* Optimizing macros and inline functions for stdio functions.
- Copyright (C) 1998, 2000 Free Software Foundation, Inc.
+ Copyright (C) 1998, 2000, 2001 Free Software Foundation, Inc.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
@@ -28,6 +28,13 @@
#ifdef __USE_EXTERN_INLINES
+/* Since version 2.97 GCC knows about `fprintf' and can optimize certain
+ cases. Help gcc to optimize more code by mapping `printf' to the known
+ `fprintf' function. Unfortunately we have to use a macro. */
+# if __GNUC_PREREQ (2,97)
+# define printf(fmt, args...) fprintf (stdout, fmt, ##args)
+# endif
+
/* Write formatted output to stdout from argument list ARG. */
__STDIO_INLINE int
vprintf (__const char *__restrict __fmt, _G_va_list __arg) __THROW