--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,16 @@
+2011-10-09  Bruno Haible  <bruno@clisp.org>
+
+	New module 'rintf'.
+	* lib/math.in.h (rintf): New declaration.
+	* lib/rintf.c: New file.
+	* m4/rintf.m4: New file.
+	* m4/math_h.m4 (gl_MATH_H): Test whether rintf is declared.
+	(gl_MATH_H_DEFAULTS): Initialize GNULIB_RINTF, HAVE_RINTF.
+	* modules/math (Makefile.am): Substitute GNULIB_RINTF, HAVE_RINTF.
+	* modules/rintf: New file.
+	* tests/test-math-c++.cc: Check the declaration of rintf.
+	* doc/posix-functions/rintf.texi: Mention the new module.
+
 2011-10-09  Bruno Haible  <bruno@clisp.org>
 
 	rint: Support for MSVC.

--- a/doc/posix-functions/rintf.texi
+++ b/doc/posix-functions/rintf.texi
@@ -4,15 +4,15 @@
 
 POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/rintf.html}
 
-Gnulib module: ---
+Gnulib module: rintf
 
 Portability problems fixed by Gnulib:
 @itemize
-@end itemize
-
-Portability problems not fixed by Gnulib:
-@itemize
 @item
 This function is missing on some platforms:
 Minix 3.1.8, AIX 5.1, HP-UX 11, IRIX 6.5, Solaris 9, MSVC 9.
 @end itemize
+
+Portability problems not fixed by Gnulib:
+@itemize
+@end itemize

--- a/lib/math.in.h
+++ b/lib/math.in.h
@@ -712,6 +712,20 @@
 #endif
 
 
+#if @GNULIB_RINTF@
+# if !@HAVE_RINTF@
+_GL_FUNCDECL_SYS (rintf, float, (float x));
+# endif
+_GL_CXXALIAS_SYS (rintf, float, (float x));
+_GL_CXXALIASWARN (rintf);
+#elif defined GNULIB_POSIXCHECK
+# undef rintf
+# if HAVE_RAW_DECL_RINTF
+_GL_WARN_ON_USE (rintf, "rintf is unportable - "
+                 "use gnulib module rintf for portability");
+# endif
+#endif
+
 #if @GNULIB_RINT@
 # if !@HAVE_RINT@
 _GL_FUNCDECL_SYS (rint, double, (double x));

new file mode 100644
--- /dev/null
+++ b/lib/rintf.c
@@ -0,0 +1,19 @@
+/* Round according to the current rounding mode.
+   Copyright (C) 2011 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License along
+   with this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+#define USE_FLOAT
+#include "rint.c"

--- a/m4/math_h.m4
+++ b/m4/math_h.m4
@@ -1,4 +1,4 @@
-# math_h.m4 serial 51
+# math_h.m4 serial 52
 dnl Copyright (C) 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,
@@ -43,7 +43,7 @@
      ceilf ceill copysign copysignf copysignl cosf cosl coshf
      expf expl fabsf floorf floorl fmodf frexpf frexpl
      ldexpf ldexpl logb logf logl log10f modff powf
-     rint round roundf roundl sinf sinl sinhf sqrtf sqrtl
+     rint rintf round roundf roundl sinf sinl sinhf sqrtf sqrtl
      tanf tanl tanhf trunc truncf truncl])
 ])
 
@@ -99,6 +99,7 @@
   GNULIB_MODFF=0;     AC_SUBST([GNULIB_MODFF])
   GNULIB_POWF=0;      AC_SUBST([GNULIB_POWF])
   GNULIB_RINT=0;      AC_SUBST([GNULIB_RINT])
+  GNULIB_RINTF=0;     AC_SUBST([GNULIB_RINTF])
   GNULIB_ROUND=0;     AC_SUBST([GNULIB_ROUND])
   GNULIB_ROUNDF=0;    AC_SUBST([GNULIB_ROUNDF])
   GNULIB_ROUNDL=0;    AC_SUBST([GNULIB_ROUNDL])
@@ -143,6 +144,7 @@
   HAVE_MODFF=1;                AC_SUBST([HAVE_MODFF])
   HAVE_POWF=1;                 AC_SUBST([HAVE_POWF])
   HAVE_RINT=1;                 AC_SUBST([HAVE_RINT])
+  HAVE_RINTF=1;                AC_SUBST([HAVE_RINTF])
   HAVE_SINF=1;                 AC_SUBST([HAVE_SINF])
   HAVE_SINL=1;                 AC_SUBST([HAVE_SINL])
   HAVE_SINHF=1;                AC_SUBST([HAVE_SINHF])

new file mode 100644
--- /dev/null
+++ b/m4/rintf.m4
@@ -0,0 +1,17 @@
+# rintf.m4 serial 1
+dnl Copyright (C) 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.
+
+AC_DEFUN([gl_FUNC_RINTF],
+[
+  dnl Determine RINTF_LIBM.
+  gl_MATHFUNC([rintf], [float], [(float)])
+  if test $gl_cv_func_rintf_no_libm = no \
+     && test $gl_cv_func_rintf_in_libm = no; then
+    HAVE_RINTF=0
+    RINTF_LIBM=
+  fi
+  AC_SUBST([RINTF_LIBM])
+])

--- a/modules/math
+++ b/modules/math
@@ -69,6 +69,7 @@
 	      -e 's/@''GNULIB_MODFF''@/$(GNULIB_MODFF)/g' \
 	      -e 's/@''GNULIB_POWF''@/$(GNULIB_POWF)/g' \
 	      -e 's/@''GNULIB_RINT''@/$(GNULIB_RINT)/g' \
+	      -e 's/@''GNULIB_RINTF''@/$(GNULIB_RINTF)/g' \
 	      -e 's/@''GNULIB_ROUND''@/$(GNULIB_ROUND)/g' \
 	      -e 's/@''GNULIB_ROUNDF''@/$(GNULIB_ROUNDF)/g' \
 	      -e 's/@''GNULIB_ROUNDL''@/$(GNULIB_ROUNDL)/g' \
@@ -113,6 +114,7 @@
 	      -e 's|@''HAVE_MODFF''@|$(HAVE_MODFF)|g' \
 	      -e 's|@''HAVE_POWF''@|$(HAVE_POWF)|g' \
 	      -e 's|@''HAVE_RINT''@|$(HAVE_RINT)|g' \
+	      -e 's|@''HAVE_RINTF''@|$(HAVE_RINTF)|g' \
 	      -e 's|@''HAVE_SINF''@|$(HAVE_SINF)|g' \
 	      -e 's|@''HAVE_SINL''@|$(HAVE_SINL)|g' \
 	      -e 's|@''HAVE_SINHF''@|$(HAVE_SINHF)|g' \

new file mode 100644
--- /dev/null
+++ b/modules/rintf
@@ -0,0 +1,32 @@
+Description:
+rintf() function: round according to the current rounding mode.
+
+Files:
+lib/rintf.c
+lib/rint.c
+m4/rintf.m4
+m4/mathfunc.m4
+
+Depends-on:
+math
+
+configure.ac:
+gl_FUNC_RINTF
+if test $HAVE_RINTF = 0; then
+  AC_LIBOBJ([rintf])
+fi
+gl_MATH_MODULE_INDICATOR([rintf])
+
+Makefile.am:
+
+Include:
+<math.h>
+
+Link:
+$(RINTF_LIBM)
+
+License:
+LGPL
+
+Maintainer:
+Bruno Haible

--- a/tests/test-math-c++.cc
+++ b/tests/test-math-c++.cc
@@ -104,6 +104,9 @@
 #endif
 //SIGNATURE_CHECK (GNULIB_NAMESPACE::pow, double, (double, double));
 //SIGNATURE_CHECK (GNULIB_NAMESPACE::remainder, double, (double, double));
+#if GNULIB_TEST_RINTF
+SIGNATURE_CHECK (GNULIB_NAMESPACE::rintf, float, (float));
+#endif
 #if GNULIB_TEST_RINT
 SIGNATURE_CHECK (GNULIB_NAMESPACE::rint, double, (double));
 #endif