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GNU C Library master sources branch zack/libio-minimization updated. glibc-2.26.9000-1042-gdb922ea

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- Log -----------------------------------------------------------------;a=commitdiff;h=db922eaf0d7df3b917b6b693081219ca6065ec9e

commit db922eaf0d7df3b917b6b693081219ca6065ec9e
Author: Zack Weinberg <>
Date:   Wed Dec 27 12:56:04 2017 -0500

    Fix problems found by build-many-glibcs.
    Most of these have something to do with either old stdio or ldbl-opt.
    The changes surrounding PLT bypass for ldbl-affected symbols are a bit
    of a bodge but at least they seem to preserve the ABI expectations.
    	* include/libc-symbols.h (hidden_weak_ver, libc_hidden_weak_ver):
    	New macros.
    	* sysdeps/generic/math_ldbl_opt.h (ldbl_hidden_weak): New macro.
    	* sysdeps/ieee754/ldbl-opt/math_ldbl_opt.h: Also add it.
    	* libio/iovsprintf.c: Use ldbl_hidden_weak to define vsprintf.
    	* libio/iovsscanf.c: Use ldbl_hidden_weak to define __vsscanf.
    	* libio/vasprintf.c: Use strong_alias + ldbl_hidden_def to define
    	* libio/vsnprintf.c: Use ldbl_hidden_weak to define __vsnprintf.
    	* libio/iolibio.h: Add a multiple inclusion guard.  Use FILE
    	instead of _IO_FILE, __fpos_t instead of _IO_fpos_t, __fpos64_t
    	instead of _IO_fpos64_t, size_t instead of _IO_size_t, BUFSIZ
    	instead of _IO_BUFSIZ, and __gnuc_va_list instead of _IO_va_list.
    	Move the definitions of _IO_pos_BAD, _IO_fileno, _IO_clearerr,
    	_IO_fseek, and _IO_rewind...
    	* libio/libioP.h:
    	* conform/data/stdio.h-data: Use __gnuc_va_list instead of _G_va_list.
    	* sysdeps/ieee754/ldbl-opt/nldbl-compat.c: Include libioP.h.
    	* sysdeps/ieee754/ldbl-opt/nldbl-compat.h: Use va_list instead
    	of _G_va_list.  Declare __nldbl__IO_vfscanf by hand.
    	* sysdeps/ieee754/ldbl-opt/nldbl-iovfscanf.c: Use __gnuc_va_list
    	instead of _IO_va_list.

diff --git a/conform/data/stdio.h-data b/conform/data/stdio.h-data
index f69802c..3ef2460 100644
--- a/conform/data/stdio.h-data
+++ b/conform/data/stdio.h-data
@@ -41,7 +41,7 @@ type fpos_t
 #if !defined ISO && !defined ISO99 && !defined ISO11 && !defined POSIX
 type va_list
-#define va_list _G_va_list
+#define va_list __gnuc_va_list
 type size_t
 #if defined XOPEN2K8 || defined POSIX2008
diff --git a/include/libc-symbols.h b/include/libc-symbols.h
index 8726262..0cd459b 100644
--- a/include/libc-symbols.h
+++ b/include/libc-symbols.h
@@ -471,6 +471,8 @@ for linking")
   extern __typeof (name) __EI_##name \
 	__attribute__((alias (__hidden_asmname (#local))))
 #  define hidden_ver(local, name)	__hidden_ver1(local, __GI_##name, name);
+#  define hidden_weak_ver(local, name) \
+	__hidden_ver1(local, __GI_##name, name) __attribute__((weak));
 #  define hidden_data_ver(local, name)	hidden_ver(local, name)
 #  define hidden_def(name)		__hidden_ver1(__GI_##name, name, name);
 #  define hidden_data_def(name)		hidden_def(name)
@@ -499,6 +501,7 @@ for linking")
 #  define hidden_def(name)	strong_alias (name, __GI_##name)
 #  define hidden_weak(name)	hidden_def (name)
 #  define hidden_ver(local, name) strong_alias (local, __GI_##name)
+#  define hidden_weak_ver(local, name) hidden_ver (local, name)
 #  define hidden_data_def(name)	strong_data_alias (name, __GI_##name)
 #  define hidden_data_weak(name)	hidden_data_def (name)
 #  define hidden_data_ver(local, name) strong_data_alias (local, __GI_##name)
@@ -527,6 +530,7 @@ for linking")
 # define hidden_weak(name)
 # define hidden_def(name)
 # define hidden_ver(local, name)
+# define hidden_weak_ver(local, name)
 # define hidden_data_weak(name)
 # define hidden_data_def(name)
 # define hidden_data_ver(local, name)
@@ -545,6 +549,7 @@ for linking")
 #  define libc_hidden_nolink_sunrpc(name, version) hidden_nolink (name, libc, version)
 # endif
 # define libc_hidden_ver(local, name) hidden_ver (local, name)
+# define libc_hidden_weak_ver(local, name) hidden_weak_ver (local, name)
 # define libc_hidden_data_def(name) hidden_data_def (name)
 # define libc_hidden_data_weak(name) hidden_data_weak (name)
 # define libc_hidden_data_ver(local, name) hidden_data_ver (local, name)
@@ -554,6 +559,7 @@ for linking")
 # define libc_hidden_def(name)
 # define libc_hidden_weak(name)
 # define libc_hidden_ver(local, name)
+# define libc_hidden_weak_ver(local, name)
 # define libc_hidden_data_def(name)
 # define libc_hidden_data_weak(name)
 # define libc_hidden_data_ver(local, name)
diff --git a/libio/iolibio.h b/libio/iolibio.h
index 621b31c..81825bb 100644
--- a/libio/iolibio.h
+++ b/libio/iolibio.h
@@ -1,74 +1,76 @@
+#ifndef _IOLIBIO_H
+#define _IOLIBIO_H 1
 #include <stdio.h>
 /* These emulate stdio functionality, but with a different name
-   (_IO_ungetc instead of ungetc), and using _IO_FILE instead of FILE. */
+   (_IO_ungetc instead of ungetc). */
 #ifdef __cplusplus
 extern "C" {
-extern int _IO_fclose (_IO_FILE*);
-extern int _IO_new_fclose (_IO_FILE*);
-extern int _IO_old_fclose (_IO_FILE*);
-extern _IO_FILE *_IO_fdopen (int, const char*) __THROW;
+extern int _IO_fclose (FILE*);
+extern int _IO_new_fclose (FILE*);
+extern int _IO_old_fclose (FILE*);
+extern FILE *_IO_fdopen (int, const char*) __THROW;
 libc_hidden_proto (_IO_fdopen)
-extern _IO_FILE *_IO_old_fdopen (int, const char*) __THROW;
-extern _IO_FILE *_IO_new_fdopen (int, const char*) __THROW;
-extern int _IO_fflush (_IO_FILE*);
+extern FILE *_IO_old_fdopen (int, const char*) __THROW;
+extern FILE *_IO_new_fdopen (int, const char*) __THROW;
+extern int _IO_fflush (FILE*);
 libc_hidden_proto (_IO_fflush)
-extern int _IO_fgetpos (_IO_FILE*, _IO_fpos_t*);
-extern int _IO_fgetpos64 (_IO_FILE*, _IO_fpos64_t*);
-extern char* _IO_fgets (char*, int, _IO_FILE*);
-extern _IO_FILE *_IO_fopen (const char*, const char*);
-extern _IO_FILE *_IO_old_fopen (const char*, const char*);
-extern _IO_FILE *_IO_new_fopen (const char*, const char*);
-extern _IO_FILE *_IO_fopen64 (const char*, const char*);
-extern _IO_FILE *__fopen_internal (const char*, const char*, int)
+extern int _IO_fgetpos (FILE*, __fpos_t*);
+extern int _IO_fgetpos64 (FILE*, __fpos64_t*);
+extern char* _IO_fgets (char*, int, FILE*);
+extern FILE *_IO_fopen (const char*, const char*);
+extern FILE *_IO_old_fopen (const char*, const char*);
+extern FILE *_IO_new_fopen (const char*, const char*);
+extern FILE *_IO_fopen64 (const char*, const char*);
+extern FILE *__fopen_internal (const char*, const char*, int)
-extern _IO_FILE *__fopen_maybe_mmap (_IO_FILE *) __THROW attribute_hidden;
-extern int _IO_fprintf (_IO_FILE*, const char*, ...);
-extern int _IO_fputs (const char*, _IO_FILE*);
+extern FILE *__fopen_maybe_mmap (FILE *) __THROW attribute_hidden;
+extern int _IO_fprintf (FILE*, const char*, ...);
+extern int _IO_fputs (const char*, FILE*);
 libc_hidden_proto (_IO_fputs)
-extern int _IO_fsetpos (_IO_FILE*, const _IO_fpos_t *);
-extern int _IO_fsetpos64 (_IO_FILE*, const _IO_fpos64_t *);
-extern long int _IO_ftell (_IO_FILE*);
+extern int _IO_fsetpos (FILE*, const __fpos_t *);
+extern int _IO_fsetpos64 (FILE*, const __fpos64_t *);
+extern long int _IO_ftell (FILE*);
 libc_hidden_proto (_IO_ftell)
-extern _IO_size_t _IO_fread (void*, _IO_size_t, _IO_size_t, _IO_FILE*);
+extern size_t _IO_fread (void*, size_t, size_t, FILE*);
 libc_hidden_proto (_IO_fread)
-extern _IO_size_t _IO_fwrite (const void*, _IO_size_t, _IO_size_t, _IO_FILE*);
+extern size_t _IO_fwrite (const void*, size_t, size_t, FILE*);
 libc_hidden_proto (_IO_fwrite)
 extern char* _IO_gets (char*);
 extern void _IO_perror (const char*) __THROW;
 extern int _IO_printf (const char*, ...);
 extern int _IO_puts (const char*);
 extern int _IO_scanf (const char*, ...);
-extern void _IO_setbuffer (_IO_FILE *, char*, _IO_size_t) __THROW;
+extern void _IO_setbuffer (FILE *, char*, size_t) __THROW;
 libc_hidden_proto (_IO_setbuffer)
-extern int _IO_setvbuf (_IO_FILE*, char*, int, _IO_size_t) __THROW;
+extern int _IO_setvbuf (FILE*, char*, int, size_t) __THROW;
 libc_hidden_proto (_IO_setvbuf)
 extern int _IO_sscanf (const char*, const char*, ...) __THROW;
 extern int _IO_sprintf (char *, const char*, ...) __THROW;
-extern int _IO_ungetc (int, _IO_FILE*) __THROW;
-extern int _IO_vsscanf (const char *, const char *, _IO_va_list) __THROW;
-extern int _IO_vsprintf (char*, const char*, _IO_va_list) __THROW;
+extern int _IO_ungetc (int, FILE*) __THROW;
+extern int _IO_vsscanf (const char *, const char *, __gnuc_va_list) __THROW;
+extern int _IO_vsprintf (char*, const char*, __gnuc_va_list) __THROW;
 libc_hidden_proto (_IO_vsprintf)
-extern int _IO_vswprintf (wchar_t*, _IO_size_t, const wchar_t*, _IO_va_list)
+extern int _IO_vswprintf (wchar_t*, size_t, const wchar_t*, __gnuc_va_list)
 struct obstack;
-extern int _IO_obstack_vprintf (struct obstack *, const char *, _IO_va_list)
+extern int _IO_obstack_vprintf (struct obstack *, const char *, __gnuc_va_list)
 extern int _IO_obstack_printf (struct obstack *, const char *, ...) __THROW;
-#ifndef _IO_pos_BAD
-#define _IO_pos_BAD ((_IO_off64_t)(-1))
-#define _IO_clearerr(FP) ((FP)->_flags &= ~(_IO_ERR_SEEN|_IO_EOF_SEEN))
-#define _IO_fseek(__fp, __offset, __whence) \
-  (_IO_seekoff_unlocked (__fp, __offset, __whence, _IOS_INPUT|_IOS_OUTPUT) \
-   == _IO_pos_BAD ? EOF : 0)
-#define _IO_rewind(FILE) \
-  (void) _IO_seekoff_unlocked (FILE, 0, 0, _IOS_INPUT|_IOS_OUTPUT)
-#define _IO_vprintf(FORMAT, ARGS) \
+extern FILE* _IO_popen (const char*, const char*) __THROW;
+extern FILE* _IO_new_popen (const char*, const char*) __THROW;
+extern FILE* _IO_old_popen (const char*, const char*) __THROW;
+extern int __new_pclose (FILE *) __THROW;
+extern int __old_pclose (FILE *) __THROW;
+#define _IO_pclose _IO_fclose
+#define _IO_vprintf(FORMAT, ARGS)               \
   _IO_vfprintf (_IO_stdout, FORMAT, ARGS)
 #define _IO_freopen(FILENAME, MODE, FP) \
   (_IO_file_close_it (FP), \
@@ -78,19 +80,15 @@ extern int _IO_obstack_printf (struct obstack *, const char *, ...) __THROW;
 #define _IO_freopen64(FILENAME, MODE, FP) \
   (_IO_file_close_it (FP), \
    _IO_file_fopen (FP, FILENAME, MODE, 0))
-#define _IO_fileno(FP) ((FP)->_fileno)
-extern _IO_FILE* _IO_popen (const char*, const char*) __THROW;
-extern _IO_FILE* _IO_new_popen (const char*, const char*) __THROW;
-extern _IO_FILE* _IO_old_popen (const char*, const char*) __THROW;
-extern int __new_pclose (_IO_FILE *) __THROW;
-extern int __old_pclose (_IO_FILE *) __THROW;
-#define _IO_pclose _IO_fclose
-#define _IO_setbuf(_FP, _BUF) _IO_setbuffer (_FP, _BUF, _IO_BUFSIZ)
+#define _IO_setbuf(_FP, _BUF) _IO_setbuffer (_FP, _BUF, BUFSIZ)
 #define _IO_setlinebuf(_FP) _IO_setvbuf (_FP, NULL, 1, 0)
-_IO_FILE *__new_freopen (const char *, const char *, _IO_FILE *) __THROW;
-_IO_FILE *__old_freopen (const char *, const char *, _IO_FILE *) __THROW;
+FILE *__new_freopen (const char *, const char *, FILE *) __THROW;
+FILE *__old_freopen (const char *, const char *, FILE *) __THROW;
 #ifdef __cplusplus
diff --git a/libio/iovsprintf.c b/libio/iovsprintf.c
index 63290fb..d8a7bc7 100644
--- a/libio/iovsprintf.c
+++ b/libio/iovsprintf.c
@@ -44,7 +44,6 @@ __IO_vsprintf (char *string, const char *format, _IO_va_list args)
   return ret;
 ldbl_hidden_def (__IO_vsprintf, _IO_vsprintf)
 ldbl_strong_alias (__IO_vsprintf, _IO_vsprintf)
 ldbl_weak_alias (__IO_vsprintf, vsprintf)
-libc_hidden_weak (vsprintf)
+ldbl_hidden_weak (__IO_vsprintf, vsprintf)
diff --git a/libio/iovsscanf.c b/libio/iovsscanf.c
index b96ad6b..17570d3 100644
--- a/libio/iovsscanf.c
+++ b/libio/iovsscanf.c
@@ -42,5 +42,5 @@ _IO_vsscanf (const char *string, const char *format, _IO_va_list args)
   return ret;
 ldbl_weak_alias (_IO_vsscanf, __vsscanf)
-libc_hidden_weak (__vsscanf)
+ldbl_hidden_weak (_IO_vsscanf, __vsscanf)
 ldbl_weak_alias (_IO_vsscanf, vsscanf)
diff --git a/libio/libioP.h b/libio/libioP.h
index 914caac..8f22fc0 100644
--- a/libio/libioP.h
+++ b/libio/libioP.h
@@ -45,6 +45,18 @@
 #include <bits/libio.h>
 #include "iolibio.h"
+#ifndef _IO_pos_BAD
+#define _IO_pos_BAD ((__off64_t)(-1))
+#define _IO_fileno(FP) ((FP)->_fileno)
+#define _IO_clearerr(FP) ((FP)->_flags &= ~(_IO_ERR_SEEN|_IO_EOF_SEEN))
+#define _IO_fseek(__fp, __offset, __whence) \
+  (_IO_seekoff_unlocked (__fp, __offset, __whence, _IOS_INPUT|_IOS_OUTPUT) \
+   == _IO_pos_BAD ? EOF : 0)
+#define _IO_rewind(FILE) \
+  (void) _IO_seekoff_unlocked (FILE, 0, 0, _IOS_INPUT|_IOS_OUTPUT)
 #ifdef __cplusplus
 extern "C" {
diff --git a/libio/vasprintf.c b/libio/vasprintf.c
index cf7ad0a..853d123 100644
--- a/libio/vasprintf.c
+++ b/libio/vasprintf.c
@@ -85,5 +85,6 @@ _IO_vasprintf (char **result_ptr, const char *format, _IO_va_list args)
   (*result_ptr)[needed - 1] = '\0';
   return ret;
-ldbl_strong_alias (_IO_vasprintf, __vasprintf)
+strong_alias (_IO_vasprintf, __vasprintf)
+ldbl_hidden_def (_IO_vasprintf, __vasprintf)
 ldbl_weak_alias (_IO_vasprintf, vasprintf)
diff --git a/libio/vsnprintf.c b/libio/vsnprintf.c
index 8a8a34e..cd05215 100644
--- a/libio/vsnprintf.c
+++ b/libio/vsnprintf.c
@@ -119,4 +119,4 @@ _IO_vsnprintf (char *string, _IO_size_t maxlen, const char *format,
 ldbl_weak_alias (_IO_vsnprintf, __vsnprintf)
 ldbl_weak_alias (_IO_vsnprintf, vsnprintf)
-libc_hidden_weak (__vsnprintf)
+ldbl_hidden_weak (_IO_vsnprintf, __vsnprintf)
diff --git a/sysdeps/generic/math_ldbl_opt.h b/sysdeps/generic/math_ldbl_opt.h
index 8a5d8ba..a4b3806 100644
--- a/sysdeps/generic/math_ldbl_opt.h
+++ b/sysdeps/generic/math_ldbl_opt.h
@@ -9,6 +9,7 @@
 #define LONG_DOUBLE_COMPAT(lib, introduced) 0
 #define long_double_symbol(lib, local, symbol)
 #define ldbl_hidden_def(local, name) libc_hidden_def (name)
+#define ldbl_hidden_weak(local, name) libc_hidden_weak (name)
 #define ldbl_strong_alias(name, aliasname) strong_alias (name, aliasname)
 #define ldbl_weak_alias(name, aliasname) weak_alias (name, aliasname)
 #define __ldbl_is_dbl 0
diff --git a/sysdeps/ieee754/ldbl-opt/math_ldbl_opt.h b/sysdeps/ieee754/ldbl-opt/math_ldbl_opt.h
index af861c1..5994240 100644
--- a/sysdeps/ieee754/ldbl-opt/math_ldbl_opt.h
+++ b/sysdeps/ieee754/ldbl-opt/math_ldbl_opt.h
@@ -12,6 +12,7 @@
   long_double_symbol_1 (lib, local, symbol, LONG_DOUBLE_COMPAT_VERSION)
 #ifdef SHARED
 # define ldbl_hidden_def(local, name) libc_hidden_ver (local, name)
+# define ldbl_hidden_weak(local, name) libc_hidden_weak_ver (local, name)
 # define ldbl_strong_alias(name, aliasname) \
   strong_alias (name, __GL_##name##_##aliasname) \
   long_double_symbol (libc, __GL_##name##_##aliasname, aliasname);
@@ -22,6 +23,7 @@
   versioned_symbol (lib, local, symbol, version)
 # define ldbl_hidden_def(local, name) libc_hidden_def (name)
+# define ldbl_hidden_weak(local, name) libc_hidden_weak (name)
 # define ldbl_strong_alias(name, aliasname) strong_alias (name, aliasname)
 # define ldbl_weak_alias(name, aliasname) weak_alias (name, aliasname)
 # ifndef __ASSEMBLER__
diff --git a/sysdeps/ieee754/ldbl-opt/nldbl-compat.c b/sysdeps/ieee754/ldbl-opt/nldbl-compat.c
index 3e01435..db51822 100644
--- a/sysdeps/ieee754/ldbl-opt/nldbl-compat.c
+++ b/sysdeps/ieee754/ldbl-opt/nldbl-compat.c
@@ -25,6 +25,7 @@
 #include <locale/localeinfo.h>
 #include <sys/syslog.h>
 #include <libc-lock.h>
+#include <libio/libioP.h>
 #include "nldbl-compat.h"
diff --git a/sysdeps/ieee754/ldbl-opt/nldbl-compat.h b/sysdeps/ieee754/ldbl-opt/nldbl-compat.h
index 72ec0db..64dfa79 100644
--- a/sysdeps/ieee754/ldbl-opt/nldbl-compat.h
+++ b/sysdeps/ieee754/ldbl-opt/nldbl-compat.h
@@ -36,7 +36,6 @@
 /* Declare the __nldbl_NAME function the wrappers call that's in  */
 #define NLDBL_DECL(name) extern __typeof (name) __nldbl_##name
-NLDBL_DECL (_IO_vfscanf);
 NLDBL_DECL (vfscanf);
 NLDBL_DECL (vfwscanf);
 NLDBL_DECL (obstack_vprintf);
@@ -82,23 +81,25 @@ extern ssize_t __nldbl___vstrfmon (char *, size_t, const char *, va_list)
 /* 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, va_list);
 extern int __nldbl___vfwprintf_chk (FILE *__restrict, int,
-				    const wchar_t *__restrict, __gnuc_va_list);
+				    const wchar_t *__restrict, va_list);
 extern int __nldbl___vsprintf_chk (char *__restrict, int, size_t,
-				   const char *__restrict, _G_va_list) __THROW;
+				   const char *__restrict, va_list) __THROW;
 extern int __nldbl___vsnprintf_chk (char *__restrict, size_t, int, size_t,
-				    const char *__restrict, _G_va_list)
+				    const char *__restrict, va_list)
 extern int __nldbl___vswprintf_chk (wchar_t *__restrict, size_t, int, size_t,
-				    const wchar_t *__restrict, __gnuc_va_list)
+				    const wchar_t *__restrict, va_list)
-extern int __nldbl___vasprintf_chk (char **, int, const char *, _G_va_list)
+extern int __nldbl___vasprintf_chk (char **, int, const char *, va_list)
-extern int __nldbl___vdprintf_chk (int, int, const char *, _G_va_list);
+extern int __nldbl___vdprintf_chk (int, int, const char *, va_list);
 extern int __nldbl___obstack_vprintf_chk (struct obstack *, int, const char *,
-					  _G_va_list) __THROW;
+					  va_list) __THROW;
 extern void __nldbl___vsyslog_chk (int, int, const char *, va_list);
+/* This function is not declared by stdio.h anymore.  */
+extern int __nldbl__IO_vfscanf (FILE *, const char *, va_list, int *);
 #endif /* __NLDBL_COMPAT_H */
diff --git a/sysdeps/ieee754/ldbl-opt/nldbl-iovfscanf.c b/sysdeps/ieee754/ldbl-opt/nldbl-iovfscanf.c
index 05581c0..ffb7d78 100644
--- a/sysdeps/ieee754/ldbl-opt/nldbl-iovfscanf.c
+++ b/sysdeps/ieee754/ldbl-opt/nldbl-iovfscanf.c
@@ -2,7 +2,7 @@
-_IO_vfscanf (FILE *s, const char *fmt, _IO_va_list ap, int *errp)
+_IO_vfscanf (FILE *s, const char *fmt, __gnuc_va_list ap, int *errp)
   return __nldbl__IO_vfscanf (s, fmt, ap, errp);


Summary of changes:
 conform/data/stdio.h-data                  |    2 +-
 include/libc-symbols.h                     |    6 ++
 libio/iolibio.h                            |  100 ++++++++++++++--------------
 libio/iovsprintf.c                         |    3 +-
 libio/iovsscanf.c                          |    2 +-
 libio/libioP.h                             |   12 ++++
 libio/vasprintf.c                          |    3 +-
 libio/vsnprintf.c                          |    2 +-
 sysdeps/generic/math_ldbl_opt.h            |    1 +
 sysdeps/ieee754/ldbl-opt/math_ldbl_opt.h   |    2 +
 sysdeps/ieee754/ldbl-opt/nldbl-compat.c    |    1 +
 sysdeps/ieee754/ldbl-opt/nldbl-compat.h    |   19 +++---
 sysdeps/ieee754/ldbl-opt/nldbl-iovfscanf.c |    2 +-
 13 files changed, 88 insertions(+), 67 deletions(-)

GNU C Library master sources

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