--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,16 @@
 2011-10-08  Bruno Haible  <bruno@clisp.org>
 
+	New module 'sinhf'.
+	* lib/math.in.h (sinhf): New declaration.
+	* lib/sinhf.c: New file.
+	* m4/sinhf.m4: New file.
+	* m4/math_h.m4 (gl_MATH_H): Test whether sinhf is declared.
+	(gl_MATH_H_DEFAULTS): Initialize GNULIB_SINHF, HAVE_SINHF.
+	* modules/math (Makefile.am): Substitute GNULIB_SINHF, HAVE_SINHF.
+	* modules/sinhf: New file.
+	* tests/test-math-c++.cc: Check the declaration of sinhf.
+	* doc/posix-functions/sinhf.texi: Mention the new module.
+
 	sinh: Use a .m4 file.
 	* m4/sinh.m4: New file.
 	* modules/sinh (Files): Add it.

--- a/doc/posix-functions/sinhf.texi
+++ b/doc/posix-functions/sinhf.texi
@@ -4,14 +4,10 @@
 
 POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/sinhf.html}
 
-Gnulib module: ---
+Gnulib module: sinhf
 
 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, Solaris 9.
@@ -19,3 +15,7 @@
 This function is only defined as a macro with arguments on some platforms:
 MSVC 9.
 @end itemize
+
+Portability problems not fixed by Gnulib:
+@itemize
+@end itemize

--- a/lib/math.in.h
+++ b/lib/math.in.h
@@ -753,6 +753,22 @@
 #endif
 
 
+#if @GNULIB_SINHF@
+# if !@HAVE_SINHF@
+#  undef sinhf
+_GL_FUNCDECL_SYS (sinhf, float, (float x));
+# endif
+_GL_CXXALIAS_SYS (sinhf, float, (float x));
+_GL_CXXALIASWARN (sinhf);
+#elif defined GNULIB_POSIXCHECK
+# undef sinhf
+# if HAVE_RAW_DECL_SINHF
+_GL_WARN_ON_USE (sinhf, "sinhf is unportable - "
+                 "use gnulib module sinhf for portability");
+# endif
+#endif
+
+
 #if @GNULIB_SQRTF@
 # if !@HAVE_SQRTF@
 #  undef sqrtf

new file mode 100644
--- /dev/null
+++ b/lib/sinhf.c
@@ -0,0 +1,26 @@
+/* Hyperbolic sine function.
+   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 3 of the License, 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, see <http://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <math.h>
+
+float
+sinhf (float x)
+{
+  return (float) sinh ((double) x);
+}

--- a/m4/math_h.m4
+++ b/m4/math_h.m4
@@ -1,4 +1,4 @@
-# math_h.m4 serial 43
+# math_h.m4 serial 44
 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,
@@ -42,7 +42,7 @@
     [acosf acosl asinf asinl atanf atanl ceilf ceill cosf cosl
      expf expl fabsf floorf floorl fmodf frexpf frexpl
      ldexpf ldexpl logb logf logl log10f modff powf
-     round roundf roundl sinf sinl sqrtf sqrtl
+     round roundf roundl sinf sinl sinhf sqrtf sqrtl
      tanf tanl trunc truncf truncl])
 ])
 
@@ -99,6 +99,7 @@
   GNULIB_SIGNBIT=0;  AC_SUBST([GNULIB_SIGNBIT])
   GNULIB_SINF=0;     AC_SUBST([GNULIB_SINF])
   GNULIB_SINL=0;     AC_SUBST([GNULIB_SINL])
+  GNULIB_SINHF=0;    AC_SUBST([GNULIB_SINHF])
   GNULIB_SQRTF=0;    AC_SUBST([GNULIB_SQRTF])
   GNULIB_SQRTL=0;    AC_SUBST([GNULIB_SQRTL])
   GNULIB_TANF=0;     AC_SUBST([GNULIB_TANF])
@@ -132,6 +133,7 @@
   HAVE_POWF=1;                 AC_SUBST([HAVE_POWF])
   HAVE_SINF=1;                 AC_SUBST([HAVE_SINF])
   HAVE_SINL=1;                 AC_SUBST([HAVE_SINL])
+  HAVE_SINHF=1;                AC_SUBST([HAVE_SINHF])
   HAVE_SQRTF=1;                AC_SUBST([HAVE_SQRTF])
   HAVE_SQRTL=1;                AC_SUBST([HAVE_SQRTL])
   HAVE_TANF=1;                 AC_SUBST([HAVE_TANF])

new file mode 100644
--- /dev/null
+++ b/m4/sinhf.m4
@@ -0,0 +1,25 @@
+# sinhf.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_SINHF],
+[
+  AC_REQUIRE([gl_MATH_H_DEFAULTS])
+  AC_REQUIRE([gl_FUNC_SINH])
+
+  dnl Test whether sinhf() exists. Assume that sinhf(), if it exists, is
+  dnl defined in the same library as sinh().
+  save_LIBS="$LIBS"
+  LIBS="$LIBS $SINH_LIBM"
+  AC_CHECK_FUNCS([sinhf])
+  LIBS="$save_LIBS"
+  if test $ac_cv_func_sinhf = yes; then
+    SINHF_LIBM="$SINH_LIBM"
+  else
+    HAVE_SINHF=0
+    SINHF_LIBM="$SINH_LIBM"
+  fi
+  AC_SUBST([SINHF_LIBM])
+])

--- a/modules/math
+++ b/modules/math
@@ -70,6 +70,7 @@
 	      -e 's/@''GNULIB_SIGNBIT''@/$(GNULIB_SIGNBIT)/g' \
 	      -e 's/@''GNULIB_SINF''@/$(GNULIB_SINF)/g' \
 	      -e 's/@''GNULIB_SINL''@/$(GNULIB_SINL)/g' \
+	      -e 's/@''GNULIB_SINHF''@/$(GNULIB_SINHF)/g' \
 	      -e 's/@''GNULIB_SQRTF''@/$(GNULIB_SQRTF)/g' \
 	      -e 's/@''GNULIB_SQRTL''@/$(GNULIB_SQRTL)/g' \
 	      -e 's/@''GNULIB_TANF''@/$(GNULIB_TANF)/g' \
@@ -103,6 +104,7 @@
 	      -e 's|@''HAVE_POWF''@|$(HAVE_POWF)|g' \
 	      -e 's|@''HAVE_SINF''@|$(HAVE_SINF)|g' \
 	      -e 's|@''HAVE_SINL''@|$(HAVE_SINL)|g' \
+	      -e 's|@''HAVE_SINHF''@|$(HAVE_SINHF)|g' \
 	      -e 's|@''HAVE_SQRTF''@|$(HAVE_SQRTF)|g' \
 	      -e 's|@''HAVE_SQRTL''@|$(HAVE_SQRTL)|g' \
 	      -e 's|@''HAVE_TANF''@|$(HAVE_TANF)|g' \

new file mode 100644
--- /dev/null
+++ b/modules/sinhf
@@ -0,0 +1,31 @@
+Description:
+sinhf() function: hyperbolic sine function.
+
+Files:
+lib/sinhf.c
+m4/sinhf.m4
+
+Depends-on:
+math
+sinh            [test $HAVE_SINHF = 0]
+
+configure.ac:
+gl_FUNC_SINHF
+if test $HAVE_SINHF = 0; then
+  AC_LIBOBJ([sinhf])
+fi
+gl_MATH_MODULE_INDICATOR([sinhf])
+
+Makefile.am:
+
+Include:
+<math.h>
+
+Link:
+$(SINHF_LIBM)
+
+License:
+LGPL
+
+Maintainer:
+Bruno Haible

--- a/tests/test-math-c++.cc
+++ b/tests/test-math-c++.cc
@@ -101,6 +101,9 @@
 SIGNATURE_CHECK (GNULIB_NAMESPACE::sinf, float, (float));
 #endif
 //SIGNATURE_CHECK (GNULIB_NAMESPACE::sin, double, (double));
+#if GNULIB_TEST_SINHF
+SIGNATURE_CHECK (GNULIB_NAMESPACE::sinhf, float, (float));
+#endif
 //SIGNATURE_CHECK (GNULIB_NAMESPACE::sinh, double, (double));
 #if GNULIB_TEST_SQRTF
 SIGNATURE_CHECK (GNULIB_NAMESPACE::sqrtf, float, (float));