*printf: Add support for MSVC compiler.

* m4/printf.m4 (gl_PRINTF_DIRECTIVE_N): On MSVC, install a handler that
handles the exception caused by the %n directive. When cross-compiling,
guess no on native Windows.
(gl_SNPRINTF_TRUNCATION_C99, gl_SNPRINTF_RETVAL_C99,
gl_SNPRINTF_DIRECTIVE_N, gl_SNPRINTF_SIZE1): When snprintf is missing,
emulate it through vsnprintf.
* m4/vsnprintf-posix.m4 (gl_FUNC_VSNPRINTF_POSIX): Update comment.
* doc/posix-functions/dprintf.texi: Update documentation regarding
MSVC 9.
* 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/swprintf.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.
* doc/glibc-functions/asprintf.texi: Likewise.
* doc/glibc-functions/obstack_printf.texi: Likewise.
* doc/glibc-functions/obstack_vprintf.texi: Likewise.
* doc/glibc-functions/vasprintf.texi: Likewise.

1 files changed, 14 insertions, 11 deletions

diff --git a/doc/posix-functions/fprintf.texi b/doc/posix-functions/fprintf.texi
index 621f40780f..277885e25b 100644
--- a/doc/posix-functions/fprintf.texi
+++ b/doc/posix-functions/fprintf.texi
@@ -11,23 +11,26 @@ Portability problems fixed by Gnulib module @code{fprintf-posix}:
 @item
 This function does not support size specifiers as in C99 (@code{hh}, @code{ll},
 @code{j}, @code{t}, @code{z}) on some platforms:
-AIX 5.1, HP-UX 11.23, IRIX 6.5, OSF/1 5.1, Solaris 9, Cygwin 1.5.24, mingw, BeOS.
+AIX 5.1, HP-UX 11.23, IRIX 6.5, OSF/1 5.1, Solaris 9, Cygwin 1.5.24, mingw, MSVC 9, BeOS.
 @item
 printf of @samp{long double} numbers is unsupported on some platforms:
-mingw, BeOS.
+mingw, MSVC 9, BeOS.
 @item
 printf @code{"%f"}, @code{"%e"}, @code{"%g"} of Infinity and NaN yields an
 incorrect result on some platforms:
-AIX 5.2, OSF/1 5.1, Solaris 11 2010-11, mingw.
+AIX 5.2, OSF/1 5.1, Solaris 11 2010-11, mingw, MSVC 9.
 @item
 This function does not support the @samp{a} and @samp{A} directives on some
 platforms:
 glibc-2.3.6, MacOS X 10.5, NetBSD 5.0, OpenBSD 4.0, AIX 5.2, HP-UX 11,
-IRIX 6.5, OSF/1 5.1, Solaris 11 2010-11, Cygwin 1.5.x, mingw, BeOS.
+IRIX 6.5, OSF/1 5.1, Solaris 11 2010-11, Cygwin 1.5.x, mingw, MSVC 9, BeOS.
 @item
 This function does not support the @samp{F} directive on some platforms:
 NetBSD 3.0, AIX 5.1, HP-UX 11.23, IRIX 6.5, OSF/1 5.1, Solaris 9,
-Cygwin 1.5.x, mingw, BeOS.
+Cygwin 1.5.x, mingw, MSVC 9, BeOS.
+@item
+This function does not support the @samp{n} directive on some platforms:
+MSVC 9.
 @item
 This function does not support the @samp{ls} directive on some platforms:
 OpenBSD 4.0, IRIX 6.5, Solaris 2.6, Cygwin 1.5.x, Haiku.
@@ -38,10 +41,10 @@ Solaris 11 2010-11.
 @item
 This function does not support format directives that access arguments in an
 arbitrary order, such as @code{"%2$s"}, on some platforms:
-NetBSD 3.0, mingw, BeOS.
+NetBSD 3.0, mingw, MSVC 9, BeOS.
 @item
 This function doesn't support the @code{'} flag on some platforms:
-NetBSD 3.0, Cygwin 1.5.24, mingw.
+NetBSD 3.0, Cygwin 1.5.24, mingw, MSVC 9.
 @item
 This function behaves incorrectly when a @samp{-} flag and a negative width
 are specified together, on some platforms:
@@ -49,11 +52,11 @@ HP-UX 10.20.
 @item
 printf @code{"%010f"} of NaN and Infinity yields an incorrect result (padded
 with zeroes) on some platforms:
-MacOS X 10.5, FreeBSD 6.0, NetBSD 5.0, AIX 5.2, IRIX 6.5, OSF/1 5.1, Solaris 11 2010-11, Cygwin 1.5.x, mingw.
+MacOS X 10.5, FreeBSD 6.0, NetBSD 5.0, AIX 5.2, IRIX 6.5, OSF/1 5.1, Solaris 11 2010-11, Cygwin 1.5.x, mingw, MSVC 9.
 @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, Solaris 10/x86, mingw, BeOS.
+AIX 7.1, Solaris 10/x86, mingw, MSVC 9, BeOS.
 @item
 This function mishandles large floating point precisions
 (for example, formatting 1.0 with @samp{"%.511f"})
@@ -70,7 +73,7 @@ Portability problems fixed by Gnulib module @code{stdio} or @code{fprintf-posix}
 When writing to a non-blocking pipe whose buffer is full, this function fails
 with @code{errno} being set to @code{ENOSPC} instead of @code{EAGAIN} on some
 platforms:
-mingw.
+mingw, MSVC 9.
 @end itemize
 
 Portability problems fixed by Gnulib module @code{stdio} or @code{fprintf-posix}, together with module @code{sigpipe}:
@@ -78,7 +81,7 @@ Portability problems fixed by Gnulib module @code{stdio} or @code{fprintf-posix}
 @item
 When writing to a pipe with no readers, this function fails, instead of
 obeying the current @code{SIGPIPE} handler, on some platforms:
-mingw.
+mingw, MSVC 9.
 @end itemize
 
 Portability problems not fixed by Gnulib: