--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,19 @@
+2011-06-19  Bruno Haible  <bruno@clisp.org>
+
+	sprintf-posix: Fix test failure on AIX 7.1.
+	* m4/printf.m4 (gl_PRINTF_PRECISION): Test against AIX bug.
+	* doc/posix-functions/dprintf.texi: Mention limited precision problem
+	on AIX.
+	* doc/posix-functions/fprintf.texi: Likewise.
+	* doc/posix-functions/printf.texi: Likewise.
+	* doc/posix-functions/snprintf.texi: Likewise.
+	* doc/posix-functions/sprintf.texi: Likewise.
+	* doc/posix-functions/vdprintf.texi: Likewise.
+	* doc/posix-functions/vfprintf.texi: Likewise.
+	* doc/posix-functions/vprintf.texi: Likewise.
+	* doc/posix-functions/vsnprintf.texi: Likewise.
+	* doc/posix-functions/vsprintf.texi: Likewise.
+
 2011-06-19  Bruno Haible  <bruno@clisp.org>
 
 	roundl-ieee: Fix test failure on AIX 7.1.

--- a/doc/posix-functions/dprintf.texi
+++ b/doc/posix-functions/dprintf.texi
@@ -20,6 +20,10 @@
 This function does not support the @samp{a} and @samp{A} directives on some
 platforms:
 glibc-2.3.6.
+@item
+This function does not support precisions larger than 512 or 1024 in integer,
+floating-point and pointer output on some platforms:
+AIX 7.1.
 @end itemize
 
 Portability problems not fixed by Gnulib:

--- a/doc/posix-functions/fprintf.texi
+++ b/doc/posix-functions/fprintf.texi
@@ -53,7 +53,7 @@
 @item
 This function does not support precisions larger than 512 or 1024 in integer,
 floating-point and pointer output on some platforms:
-Solaris 10/x86, mingw, BeOS.
+AIX 7.1, Solaris 10/x86, mingw, BeOS.
 @item
 This function mishandles large floating point precisions
 (for example, formatting 1.0 with @samp{"%.511f"})

--- a/doc/posix-functions/printf.texi
+++ b/doc/posix-functions/printf.texi
@@ -53,7 +53,7 @@
 @item
 This function does not support precisions larger than 512 or 1024 in integer,
 floating-point and pointer output on some platforms:
-Solaris 10/x86, mingw, BeOS.
+AIX 7.1, Solaris 10/x86, mingw, BeOS.
 @item
 This function mishandles large floating point precisions
 (for example, formatting 1.0 with @samp{"%.511f"})

--- a/doc/posix-functions/snprintf.texi
+++ b/doc/posix-functions/snprintf.texi
@@ -67,7 +67,7 @@
 @item
 This function does not support precisions larger than 512 or 1024 in integer,
 floating-point and pointer output on some platforms:
-Solaris 10/x86, mingw, BeOS.
+AIX 7.1, Solaris 10/x86, mingw, BeOS.
 @item
 This function mishandles large floating point precisions
 (for example, formatting 1.0 with @samp{"%.511f"})

--- a/doc/posix-functions/sprintf.texi
+++ b/doc/posix-functions/sprintf.texi
@@ -53,7 +53,7 @@
 @item
 This function does not support precisions larger than 512 or 1024 in integer,
 floating-point and pointer output on some platforms:
-Solaris 10/x86, mingw, BeOS.
+AIX 7.1, Solaris 10/x86, mingw, BeOS.
 @item
 This function mishandles large floating point precisions
 (for example, formatting 1.0 with @samp{"%.511f"})

--- a/doc/posix-functions/vdprintf.texi
+++ b/doc/posix-functions/vdprintf.texi
@@ -37,7 +37,7 @@
 @item
 This function does not support precisions larger than 512 or 1024 in integer,
 floating-point and pointer output on some platforms:
-BeOS.
+AIX 7.1, BeOS.
 @end itemize
 
 Portability problems not fixed by Gnulib:

--- a/doc/posix-functions/vfprintf.texi
+++ b/doc/posix-functions/vfprintf.texi
@@ -53,7 +53,7 @@
 @item
 This function does not support precisions larger than 512 or 1024 in integer,
 floating-point and pointer output on some platforms:
-Solaris 10/x86, mingw, BeOS.
+AIX 7.1, Solaris 10/x86, mingw, BeOS.
 @item
 This function mishandles large floating point precisions
 (for example, formatting 1.0 with @samp{"%.511f"})

--- a/doc/posix-functions/vprintf.texi
+++ b/doc/posix-functions/vprintf.texi
@@ -53,7 +53,7 @@
 @item
 This function does not support precisions larger than 512 or 1024 in integer,
 floating-point and pointer output on some platforms:
-Solaris 10/x86, mingw, BeOS.
+AIX 7.1, Solaris 10/x86, mingw, BeOS.
 @item
 This function mishandles large floating point precisions
 (for example, formatting 1.0 with @samp{"%.511f"})

--- a/doc/posix-functions/vsnprintf.texi
+++ b/doc/posix-functions/vsnprintf.texi
@@ -67,7 +67,7 @@
 @item
 This function does not support precisions larger than 512 or 1024 in integer,
 floating-point and pointer output on some platforms:
-Solaris 10/x86, mingw, BeOS.
+AIX 7.1, Solaris 10/x86, mingw, BeOS.
 @item
 This function mishandles large floating point precisions
 (for example, formatting 1.0 with @samp{"%.511f"})

--- a/doc/posix-functions/vsprintf.texi
+++ b/doc/posix-functions/vsprintf.texi
@@ -53,7 +53,7 @@
 @item
 This function does not support precisions larger than 512 or 1024 in integer,
 floating-point and pointer output on some platforms:
-Solaris 10/x86, mingw, BeOS.
+AIX 7.1, Solaris 10/x86, mingw, BeOS.
 @item
 This function mishandles large floating point precisions
 (for example, formatting 1.0 with @samp{"%.511f"})

--- a/m4/printf.m4
+++ b/m4/printf.m4
@@ -1,4 +1,4 @@
-# printf.m4 serial 42
+# printf.m4 serial 43
 dnl Copyright (C) 2003, 2007-2011 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -892,7 +892,8 @@
 dnl floating-point or pointer output. On Solaris 10/x86, precisions larger
 dnl than 510 in floating-point output crash the program. On Solaris 10/SPARC,
 dnl precisions larger than 510 in floating-point output yield wrong results.
-dnl On BeOS, precisions larger than 1044 crash the program.
+dnl On AIX 7.1, precisions larger than 998 in floating-point output yield
+dnl wrong results. On BeOS, precisions larger than 1044 crash the program.
 dnl Result is gl_cv_func_printf_precision.
 
 AC_DEFUN([gl_PRINTF_PRECISION],
@@ -921,6 +922,9 @@
   if (sprintf (buf, "%.511f %d", 1.0, 33, 44) < 511 + 5
       || buf[0] != '1')
     result |= 4;
+  if (sprintf (buf, "%.999f %d", 1.0, 33, 44) < 999 + 5
+      || buf[0] != '1')
+    result |= 4;
   return result;
 }]])],
         [gl_cv_func_printf_precision=yes],
@@ -1465,7 +1469,8 @@
 dnl   Solaris 10                     .  .  #  #  #  .  .  #  .  .  .  #  #  .  .  .  .  .  .  .
 dnl   Solaris 2.6 ... 9              #  .  #  #  #  #  .  #  .  .  .  #  #  .  .  .  #  .  .  .
 dnl   Solaris 2.5.1                  #  .  #  #  #  #  .  #  .  .  .  #  .  .  #  #  #  #  #  #
-dnl   AIX 5.2, 7.1                   .  .  #  #  #  .  .  .  .  .  .  #  .  .  .  .  .  .  .  .
+dnl   AIX 7.1                        .  .  #  #  #  .  .  .  .  .  .  #  #  .  .  .  .  .  .  .
+dnl   AIX 5.2                        .  .  #  #  #  .  .  .  .  .  .  #  .  .  .  .  .  .  .  .
 dnl   AIX 4.3.2, 5.1                 #  .  #  #  #  #  .  .  .  .  .  #  .  .  .  .  #  .  .  .
 dnl   HP-UX 11.31                    .  .  .  .  #  .  .  .  .  .  .  #  .  .  .  .  #  #  .  .
 dnl   HP-UX 11.{00,11,23}            #  .  .  .  #  #  .  .  .  .  .  #  .  .  .  .  #  #  .  #