Merge from gnulib

* lib/stdio.in.h, m4/stdio_h.m4: Update from gnulib, incorporating:
2015-01-05 stdio: fix use of PRIdMAX on modern mingw

3 files changed, 31 insertions, 2 deletions

diff --git a/ChangeLog b/ChangeLog
index 36edfe638d4..ceceb68e9dc 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2015-01-06  Paul Eggert  <eggert@cs.ucla.edu>
+
+        Merge from gnulib
+        * lib/stdio.in.h, m4/stdio_h.m4: Update from gnulib, incorporating:
+        2015-01-05 stdio: fix use of PRIdMAX on modern mingw
+
 2015-01-04  Paul Eggert  <eggert@cs.ucla.edu>
 
         * INSTALL: Mention 'make WERROR_CFLAGS='.
diff --git a/lib/stdio.in.h b/lib/stdio.in.h
index 2a639c4478e..759c94d7abf 100644
--- a/lib/stdio.in.h
+++ b/lib/stdio.in.h
@@ -84,8 +84,13 @@
    except that it indicates to GCC that the supported format string directives
    are the ones of the system printf(), rather than the ones standardized by
    ISO C99 and POSIX.  */
-#define _GL_ATTRIBUTE_FORMAT_PRINTF_SYSTEM(formatstring_parameter, first_argument) \
+#if GNULIB_PRINTF_ATTRIBUTE_FLAVOR_GNU
+# define _GL_ATTRIBUTE_FORMAT_PRINTF_SYSTEM(formatstring_parameter, first_argument) \
+  _GL_ATTRIBUTE_FORMAT_PRINTF (formatstring_parameter, first_argument)
+#else
+# define _GL_ATTRIBUTE_FORMAT_PRINTF_SYSTEM(formatstring_parameter, first_argument) \
   _GL_ATTRIBUTE_FORMAT ((__printf__, formatstring_parameter, first_argument))
+#endif
 
 /* _GL_ATTRIBUTE_FORMAT_SCANF
    indicates to GCC that the function takes a format string and arguments,
diff --git a/m4/stdio_h.m4 b/m4/stdio_h.m4
index 42173387aff..e0c4bde1f8e 100644
--- a/m4/stdio_h.m4
+++ b/m4/stdio_h.m4
@@ -1,4 +1,4 @@
-# stdio_h.m4 serial 43
+# stdio_h.m4 serial 44
 dnl Copyright (C) 2007-2015 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -12,6 +12,24 @@ AC_DEFUN([gl_STDIO_H],
   AC_REQUIRE([gl_STDIO_H_DEFAULTS])
   gl_NEXT_HEADERS([stdio.h])
 
+  dnl Determine whether __USE_MINGW_ANSI_STDIO makes printf and
+  dnl inttypes.h behave like gnu instead of system; we must give our
+  dnl printf wrapper the right attribute to match.
+  AC_CACHE_CHECK([whether inttypes macros match system or gnu printf],
+    [gl_cv_func_printf_attribute_flavor],
+    [AC_EGREP_CPP([findme .(ll|j)d. findme],
+      [#define __STDC_FORMAT_MACROS 1
+       #include <stdio.h>
+       #include <inttypes.h>
+       findme PRIdMAX findme
+      ], [gl_cv_func_printf_attribute_flavor=gnu],
+      [gl_cv_func_printf_attribute_flavor=system])])
+  if test "$gl_cv_func_printf_attribute_flavor" = gnu; then
+    AC_DEFINE([GNULIB_PRINTF_ATTRIBUTE_FLAVOR_GNU], [1],
+      [Define to 1 if printf and friends should be labeled with
+       attribute "__gnu_printf__" instead of "__printf__"])
+  fi
+
   dnl No need to create extra modules for these functions. Everyone who uses
   dnl <stdio.h> likely needs them.
   GNULIB_FSCANF=1