re PR bootstrap/47736 (libquadmath build broken with pre-2.10 glibc)

	PR bootstrap/47736
	* configure.ac (HAVE_PRINTF_HOOKS): Test if printf_info struct has
	user field.
	* printf/quadmath-printf.c (quadmath_snprintf): Clear whole info
	field instead of setting individual fields to 0.  Don't set info.user
	to -1.
	* configure: Regenerated.

From-SVN: r170147

libquadmath/ChangeLog

 2011-02-14  Jakub Jelinek  <jakub@redhat.com>
 
+	PR bootstrap/47736
+	* configure.ac (HAVE_PRINTF_HOOKS): Test if printf_info struct has
+	user field.
+	* printf/quadmath-printf.c (quadmath_snprintf): Clear whole info
+	field instead of setting individual fields to 0.  Don't set info.user
+	to -1.
+	* configure: Regenerated.
+
 	* configure.ac (HAVE_HIDDEN_VISIBILITY): Test with -Werror in CFLAGS.
 	* printf/printf_fp.c: Don't include <alloca.h>.
 	* printf/quadmath-printf.h (_itoa): Redefine to __quadmath_itoa.

libquadmath/configure

@@ -12555,6 +12555,7 @@ main ()
 int pa_flt128 = register_printf_type (flt128_va);
 int mod_Q = register_printf_modifier (L"Q");
 int res = register_printf_specifier ('f', flt128_printf_fp, flt128_ais);
+struct printf_info info = { .user = -1 };
 
   ;
   return 0;

libquadmath/configure.ac

@@ -241,6 +241,7 @@ extern int flt128_printf_fp (FILE *, const struct printf_info *, const void *con
 int pa_flt128 = register_printf_type (flt128_va);
 int mod_Q = register_printf_modifier (L"Q");
 int res = register_printf_specifier ('f', flt128_printf_fp, flt128_ais);
+struct printf_info info = { .user = -1 };
 ],
 [quadmath_printf_hooks=yes],[quadmath_printf_hooks=no])
 AC_MSG_RESULT($quadmath_printf_hooks)

libquadmath/printf/quadmath-printf.c

@@ -121,15 +121,16 @@ quadmath_snprintf (char *str, size_t size, const char *format, ...)
     return -1;
 
   /* Clear information structure.  */
-  info.alt = 0;
+  memset (&info, '\0', sizeof info);
+  /* info.alt = 0;
   info.space = 0;
   info.left = 0;
   info.showsign = 0;
   info.group = 0;
   info.i18n = 0;
-  info.extra = 0;
+  info.extra = 0; */
   info.pad = ' ';
-  info.wide = 0;
+  /* info.wide = 0; */
 
   /* Check for spec modifiers.  */
   do
@@ -180,7 +181,7 @@ quadmath_snprintf (char *str, size_t size, const char *format, ...)
   va_start (ap, format);
 
   /* Get the field width.  */
-  info.width = 0;
+  /* info.width = 0; */
   if (*format == '*')
     {
       /* The field width is given in an argument.
@@ -213,11 +214,11 @@ quadmath_snprintf (char *str, size_t size, const char *format, ...)
     }
 
   /* Check for type modifiers.  */
-  info.is_long_double = 0;
+  /* info.is_long_double = 0;
   info.is_short = 0;
   info.is_long = 0;
   info.is_char = 0;
-  info.user = -1;
+  info.user = 0; */
 
   /* We require Q modifier.  */
   if (*format++ != 'Q')