X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fvsnprintf.m4;h=d6ce1e6a10a7a08461dc651997a1022da6f83beb;hb=946c971f93d58ec52508dbcc36b59ca9f925bf31;hp=0ffac7aa398eb13b5ea3e4b812682f0b5d269bab;hpb=cdd12b2a94aa7bb2efd561af690b56d67042f543;p=gnulib.git

diff --git a/m4/vsnprintf.m4 b/m4/vsnprintf.m4
index 0ffac7aa3..d6ce1e6a1 100644
--- a/m4/vsnprintf.m4
+++ b/m4/vsnprintf.m4
@@ -1,15 +1,52 @@
-# vsnprintf.m4 serial 1
-dnl Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
-dnl This file is free software, distributed under the terms of the GNU
-dnl General Public License.  As a special exception to the GNU General
-dnl Public License, this file may be distributed as part of a program
-dnl that contains a configuration script generated by Autoconf, under
-dnl the same distribution terms as the rest of that program.
+# vsnprintf.m4 serial 6
+dnl Copyright (C) 2002-2004, 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,
+dnl with or without modifications, as long as this notice is preserved.
 
+dnl Libintl 0.17 will replace vsnprintf only if it does not support %1$s,
+dnl but defers to any gnulib vsnprintf replacements.  Therefore, gnulib
+dnl must guarantee that the decision for replacing vsnprintf is a superset
+dnl of the reasons checked by libintl.
 AC_DEFUN([gl_FUNC_VSNPRINTF],
 [
-  AC_REPLACE_FUNCS(vsnprintf)
-  AC_CHECK_DECLS_ONCE(vsnprintf)
+  AC_REQUIRE([gl_STDIO_H_DEFAULTS])
+  gl_cv_func_vsnprintf_usable=no
+  AC_CHECK_FUNCS([vsnprintf])
+  if test $ac_cv_func_vsnprintf = yes; then
+    gl_SNPRINTF_SIZE1
+    case "$gl_cv_func_snprintf_size1" in
+      *yes)
+        gl_SNPRINTF_RETVAL_C99
+        case "$gl_cv_func_snprintf_retval_c99" in
+          *yes)
+            gl_PRINTF_POSITIONS
+            case "$gl_cv_func_printf_positions" in
+              *yes)
+                gl_cv_func_vsnprintf_usable=yes
+                ;;
+            esac
+            ;;
+        esac
+        ;;
+    esac
+  fi
+  if test $gl_cv_func_vsnprintf_usable = no; then
+    gl_REPLACE_VSNPRINTF
+  fi
+  AC_CHECK_DECLS_ONCE([vsnprintf])
+  if test $ac_cv_have_decl_vsnprintf = no; then
+    HAVE_DECL_VSNPRINTF=0
+  fi
+])
+
+AC_DEFUN([gl_REPLACE_VSNPRINTF],
+[
+  AC_REQUIRE([gl_STDIO_H_DEFAULTS])
+  AC_LIBOBJ([vsnprintf])
+  if test $ac_cv_func_vsnprintf = yes; then
+    REPLACE_VSNPRINTF=1
+  fi
   gl_PREREQ_VSNPRINTF
 ])