2018-02-07 Zack Weinberg <zackw@panix.com>
+ * bits/_G_config.h: Move back to sysdeps/generic/_G_config.h.
+ Delete all contents except for definitions of _G_HAVE_MMAP and
+ _G_HAVE_MREMAP. Add commentary explaining those two symbols.
+ * sysdeps/unix/sysv/linux/bits/_G_config.h: Move back to
+ sysdeps/unix/sysv/linux/_G_config.h. Make same content
+ change as above.
+
+ * libio/libio.h: Don't include bits/_G_config.h here.
+ Include stddef.h with __need_wchar_t defined. Include
+ bits/types/__mbstate_t.h, bits/types/wint_t.h, and gconv.h.
+ Define _IO_iconv_t here, directly.
+ Don't define _IO_HAVE_ST_BLKSIZE.
+ * libio/libioP.h: Include _G_config.h here. Move include of
+ shlib-compat.h up with rest of includes. Simplify conditionals
+ controlling definition of _IO_JUMPS_OFFSET.
+
+ * csu/init.c: Remove always-true #if around entire file.
+ Don't include stdio.h. Set _IO_stdin_used to hardwired
+ constant 0x20001, and update commentary.
+ * include/stdio.h, sysdeps/ieee754/ldbl-opt/nldbl-compat.h:
+ Replace all uses of _G_va_list with __gnuc_va_list.
+ * libio/filedoalloc.c: Use #if defined _STATBUF_ST_BLKSIZE
+ instead of #if _IO_HAVE_ST_BLKSIZE.
+ * libio/fileops.c: Test _G_HAVE_MREMAP with #if, not #ifdef.
+ * libio/iofdopen.c, libio/iofopen.c: Test _G_HAVE_MMAP with #if,
+ not #ifdef.
+
* libio/bits/libio.h: Move back to libio/libio.h and adjust
multiple-include guard to match.
Merge contents of libio/bits/libio-ldbl.h and include/libio.h
+++ /dev/null
-/* This file is needed by libio to define various configuration parameters.
- These are always the same in the GNU C library. */
-
-#ifndef _BITS_G_CONFIG_H
-#define _BITS_G_CONFIG_H 1
-
-/* Define types for libio in terms of the standard internal type names. */
-
-#include <bits/types.h>
-#define __need_size_t
-#if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
-# define __need_wchar_t
-#endif
-#define __need_NULL
-#include <stddef.h>
-
-#include <bits/types/__mbstate_t.h>
-#include <bits/types/__fpos_t.h>
-#include <bits/types/__fpos64_t.h>
-
-#define _G_fpos_t __fpos_t
-#define _G_fpos64_t __fpos64_t
-
-#if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
-# include <bits/types/wint_t.h>
-#endif
-
-#if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
-# include <gconv.h>
-typedef union
-{
- struct __gconv_info __cd;
- struct
- {
- struct __gconv_info __cd;
- struct __gconv_step_data __data;
- } __combined;
-} _G_iconv_t;
-#endif
-
-
-/* These library features are always available in the GNU C library. */
-#define _G_va_list __gnuc_va_list
-
-#define _G_HAVE_MMAP 1
-
-#define _G_IO_IO_FILE_VERSION 0x20001
-
-/* This is defined by <bits/stat.h> if `st_blksize' exists. */
-#define _G_HAVE_ST_BLKSIZE defined (_STATBUF_ST_BLKSIZE)
-
-#define _G_BUFSIZ 8192
-
-#endif /* bits/_G_config.h */
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
-#if defined __GNUC__ && __GNUC__ >= 2
-
-#include <stdio.h>
-
-/* This records which stdio is linked against in the application. */
-const int _IO_stdin_used = _G_IO_IO_FILE_VERSION;
-
-#endif
+/* Vestigial libio version number. Some code in libio checks whether
+ this symbol exists in the executable, but nothing looks at its
+ value anymore; the value it was historically set to has been
+ preserved out of an abundance of caution. */
+const int _IO_stdin_used = 0x20001;
__attribute__ ((__format__ (__printf__, 3, 4)));
libc_hidden_proto (__snprintf)
extern int __vsnprintf (char *__restrict __s, size_t __maxlen,
- const char *__restrict __format, _G_va_list __arg)
+ const char *__restrict __format, __gnuc_va_list __arg)
__attribute__ ((__format__ (__printf__, 3, 0)));
extern int __vfscanf (FILE *__restrict __s,
const char *__restrict __format,
- _G_va_list __arg)
+ __gnuc_va_list __arg)
__attribute__ ((__format__ (__scanf__, 2, 0)));
libc_hidden_proto (__vfscanf)
extern int __vscanf (const char *__restrict __format,
- _G_va_list __arg)
+ __gnuc_va_list __arg)
__attribute__ ((__format__ (__scanf__, 1, 0)));
extern _IO_ssize_t __getline (char **__lineptr, size_t *__n,
FILE *__stream) attribute_hidden;
extern int __vsscanf (const char *__restrict __s,
const char *__restrict __format,
- _G_va_list __arg)
+ __gnuc_va_list __arg)
__attribute__ ((__format__ (__scanf__, 2, 0)));
extern int __sprintf_chk (char *, int, size_t, const char *, ...) __THROW;
extern int __snprintf_chk (char *, size_t, int, size_t, const char *, ...)
__THROW;
extern int __vsprintf_chk (char *, int, size_t, const char *,
- _G_va_list) __THROW;
+ __gnuc_va_list) __THROW;
extern int __vsnprintf_chk (char *, size_t, int, size_t, const char *,
- _G_va_list) __THROW;
+ __gnuc_va_list) __THROW;
extern int __printf_chk (int, const char *, ...);
extern int __fprintf_chk (FILE *, int, const char *, ...);
-extern int __vprintf_chk (int, const char *, _G_va_list);
-extern int __vfprintf_chk (FILE *, int, const char *, _G_va_list);
+extern int __vprintf_chk (int, const char *, __gnuc_va_list);
+extern int __vfprintf_chk (FILE *, int, const char *, __gnuc_va_list);
extern char *__fgets_unlocked_chk (char *buf, size_t size, int n, FILE *fp);
extern char *__fgets_chk (char *buf, size_t size, int n, FILE *fp);
extern int __asprintf_chk (char **, int, const char *, ...) __THROW;
-extern int __vasprintf_chk (char **, int, const char *, _G_va_list) __THROW;
+extern int __vasprintf_chk (char **, int, const char *, __gnuc_va_list) __THROW;
extern int __dprintf_chk (int, int, const char *, ...);
-extern int __vdprintf_chk (int, int, const char *, _G_va_list);
+extern int __vdprintf_chk (int, int, const char *, __gnuc_va_list);
extern int __obstack_printf_chk (struct obstack *, int, const char *, ...)
__THROW;
extern int __obstack_vprintf_chk (struct obstack *, int, const char *,
- _G_va_list) __THROW;
+ __gnuc_va_list) __THROW;
extern int __isoc99_fscanf (FILE *__restrict __stream,
const char *__restrict __format, ...) __wur;
const char *__restrict __format, ...) __THROW;
extern int __isoc99_vfscanf (FILE *__restrict __s,
const char *__restrict __format,
- _G_va_list __arg) __wur;
+ __gnuc_va_list __arg) __wur;
extern int __isoc99_vscanf (const char *__restrict __format,
- _G_va_list __arg) __wur;
+ __gnuc_va_list __arg) __wur;
extern int __isoc99_vsscanf (const char *__restrict __s,
const char *__restrict __format,
- _G_va_list __arg) __THROW;
+ __gnuc_va_list __arg) __THROW;
libc_hidden_proto (__isoc99_vsscanf)
libc_hidden_proto (__isoc99_vfscanf)
local_isatty (fp->_fileno))
fp->_flags |= _IO_LINE_BUF;
}
-#if _IO_HAVE_ST_BLKSIZE
+#if defined _STATBUF_ST_BLKSIZE
if (st.st_blksize > 0 && st.st_blksize < _IO_BUFSIZ)
size = st.st_blksize;
#endif
{
/* The file added some pages. We need to remap it. */
void *p;
-#ifdef _G_HAVE_MREMAP
+#if _G_HAVE_MREMAP
p = __mremap (fp->_IO_buf_base, ROUNDED (fp->_IO_buf_end
- fp->_IO_buf_base),
ROUNDED (st.st_size), MREMAP_MAYMOVE);
new_f->fp.file._lock = &new_f->lock;
#endif
_IO_no_init (&new_f->fp.file, 0, 0, &new_f->wd,
-#ifdef _G_HAVE_MMAP
+#if _G_HAVE_MMAP
(use_mmap && (read_write & _IO_NO_WRITES))
? &_IO_wfile_jumps_maybe_mmap :
#endif
&_IO_wfile_jumps);
_IO_JUMPS (&new_f->fp) =
-#ifdef _G_HAVE_MMAP
+#if _G_HAVE_MMAP
(use_mmap && (read_write & _IO_NO_WRITES)) ? &_IO_file_jumps_maybe_mmap :
#endif
&_IO_file_jumps;
_IO_FILE *
__fopen_maybe_mmap (_IO_FILE *fp)
{
-#ifdef _G_HAVE_MMAP
+#if _G_HAVE_MMAP
if ((fp->_flags2 & _IO_FLAGS2_MMAP) && (fp->_flags & _IO_NO_WRITES))
{
/* Since this is read-only, we might be able to mmap the contents
# error "Someone forgot to include stdio-lock.h"
#endif
-#include <bits/_G_config.h>
-/* ALL of these should be defined in _G_config.h */
+#define __need_wchar_t
+#include <stddef.h>
+
+#include <bits/types/__mbstate_t.h>
+#include <bits/types/wint_t.h>
+#include <gconv.h>
+
+typedef union
+{
+ struct __gconv_info __cd;
+ struct
+ {
+ struct __gconv_info __cd;
+ struct __gconv_step_data __data;
+ } __combined;
+} _IO_iconv_t;
+
+/* Map the names used in libio to the names used in libc generally. */
#define _IO_fpos_t __fpos_t
#define _IO_fpos64_t __fpos64_t
#define _IO_size_t size_t
#define _IO_off64_t __off64_t
#define _IO_pid_t __pid_t
#define _IO_uid_t __uid_t
-#define _IO_iconv_t _G_iconv_t
-#define _IO_HAVE_ST_BLKSIZE _G_HAVE_ST_BLKSIZE
#define _IO_BUFSIZ BUFSIZ
#define _IO_wint_t wint_t
#define _IO_va_list __gnuc_va_list
#include <libio/libio.h>
#include "iolibio.h"
+#include <shlib-compat.h>
+
+/* For historical reasons this is the name of the sysdeps header that
+ adjusts the libio configuration. */
+#include <_G_config.h>
+
#ifdef __cplusplus
extern "C" {
#endif
* object being acted on (i.e. the 'this' parameter).
*/
-#include <shlib-compat.h>
-#if !SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
- /* Setting this macro disables the use of the _vtable_offset bias in
- _IO_JUMPS_FUNCS, below. That is only needed if we want to
- support old binaries (see oldfileops.c). */
-# define _G_IO_NO_BACKWARD_COMPAT 1
-#endif
-
-#if (!defined _IO_USE_OLD_IO_FILE \
- && (!defined _G_IO_NO_BACKWARD_COMPAT || _G_IO_NO_BACKWARD_COMPAT == 0))
+/* Setting this macro to 1 enables the use of the _vtable_offset bias
+ in _IO_JUMPS_FUNCS, below. This is only needed for new-format
+ _IO_FILE in libc that must support old binaries (see oldfileops.c). */
+#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1) && !defined _IO_USE_OLD_IO_FILE
# define _IO_JUMPS_OFFSET 1
#else
# define _IO_JUMPS_OFFSET 0
--- /dev/null
+/* Configuration parameters for stdio - generic version. */
+
+#ifndef __G_CONFIG_H
+#define __G_CONFIG_H 1
+
+/* Define to 1 if the operating system supports mmap, 0 otherwise.
+ This function is required by POSIX but might still be unavailable,
+ for instance when the hardware lacks support for virtual memory. */
+#define _G_HAVE_MMAP 1
+
+/* Define to 1 if the operating system supports mremap, 0 otherwise.
+ This function is currently a Linux-specific extension. */
+#define _G_HAVE_MREMAP 0
+
+#endif /* _G_config.h */
/* These don't use __typeof because they were not declared by the headers,
since we don't compile with _FORTIFY_SOURCE. */
extern int __nldbl___vfprintf_chk (FILE *__restrict, int,
- const char *__restrict, _G_va_list);
+ const char *__restrict, __gnuc_va_list);
extern int __nldbl___vfwprintf_chk (FILE *__restrict, int,
const wchar_t *__restrict, __gnuc_va_list);
extern int __nldbl___vsprintf_chk (char *__restrict, int, size_t,
- const char *__restrict, _G_va_list) __THROW;
+ const char *__restrict, __gnuc_va_list)
+ __THROW;
extern int __nldbl___vsnprintf_chk (char *__restrict, size_t, int, size_t,
- const char *__restrict, _G_va_list)
+ const char *__restrict, __gnuc_va_list)
__THROW;
extern int __nldbl___vswprintf_chk (wchar_t *__restrict, size_t, int, size_t,
const wchar_t *__restrict, __gnuc_va_list)
__THROW;
-extern int __nldbl___vasprintf_chk (char **, int, const char *, _G_va_list)
+extern int __nldbl___vasprintf_chk (char **, int, const char *, __gnuc_va_list)
__THROW;
-extern int __nldbl___vdprintf_chk (int, int, const char *, _G_va_list);
+extern int __nldbl___vdprintf_chk (int, int, const char *, __gnuc_va_list);
extern int __nldbl___obstack_vprintf_chk (struct obstack *, int, const char *,
- _G_va_list) __THROW;
+ __gnuc_va_list) __THROW;
extern void __nldbl___vsyslog_chk (int, int, const char *, va_list);
--- /dev/null
+/* Configuration parameters for stdio - Linux version. */
+
+#ifndef __G_CONFIG_H
+#define __G_CONFIG_H 1
+
+/* Define to 1 if the operating system supports mmap, 0 otherwise.
+ This function is required by POSIX but might still be unavailable,
+ for instance when the hardware lacks support for virtual memory. */
+#define _G_HAVE_MMAP 1
+
+/* Define to 1 if the operating system supports mremap, 0 otherwise.
+ This function is currently a Linux-specific extension. */
+#define _G_HAVE_MREMAP 1
+
+#endif /* bits/_G_config.h */
+++ /dev/null
-/* This file is needed by libio to define various configuration parameters.
- These are always the same in the GNU C library. */
-
-#ifndef _BITS_G_CONFIG_H
-#define _BITS_G_CONFIG_H 1
-
-/* Define types for libio in terms of the standard internal type names. */
-
-#include <bits/types.h>
-#define __need_size_t
-#if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
-# define __need_wchar_t
-#endif
-#define __need_NULL
-#include <stddef.h>
-
-#include <bits/types/__mbstate_t.h>
-#include <bits/types/__fpos_t.h>
-#include <bits/types/__fpos64_t.h>
-
-#define _G_fpos_t __fpos_t
-#define _G_fpos64_t __fpos64_t
-
-#if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
-# include <bits/types/wint_t.h>
-#endif
-
-#if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
-# include <gconv.h>
-typedef union
-{
- struct __gconv_info __cd;
- struct
- {
- struct __gconv_info __cd;
- struct __gconv_step_data __data;
- } __combined;
-} _G_iconv_t;
-#endif
-
-
-/* These library features are always available in the GNU C library. */
-#define _G_va_list __gnuc_va_list
-
-#define _G_HAVE_MMAP 1
-#define _G_HAVE_MREMAP 1
-
-#define _G_IO_IO_FILE_VERSION 0x20001
-
-/* This is defined by <bits/stat.h> if `st_blksize' exists. */
-#define _G_HAVE_ST_BLKSIZE defined (_STATBUF_ST_BLKSIZE)
-
-#define _G_BUFSIZ 8192
-
-#endif /* bits/_G_config.h */
git://sourceware.org / glibc.git / commitdiff