Index: configure.ac
===================================================================
--- configure.ac	(revision 379425)
+++ configure.ac	(working copy)
@@ -568,7 +568,7 @@
 # so that AC_CHECK_FUNCS can detect functions in that library.
 AC_CHECK_LIB([m], [sqrt])
 # BSD might not have exp2, and/or log2
-AC_CHECK_FUNCS([exp2 log2 exp10 log10 sin cos tan asin acos atan atan2 pow rint exp log remainder fmod round trunc floor ceil])
+AC_CHECK_FUNCS([exp2 log2 exp10 log10 sin cos tan asin acos atan atan2 pow rint exp log remainder fmod round roundf trunc floor ceil])
 
 # Certain architectures don't really have long double, even though
 # AC_CHECK_FUNCS would otherwise find the following functions.
Index: include/asterisk/compat.h
===================================================================
--- include/asterisk/compat.h	(revision 379425)
+++ include/asterisk/compat.h	(working copy)
@@ -216,4 +216,12 @@
 #define MY_GLOB_FLAGS   (GLOB_NOMAGIC | GLOB_BRACE)
 #endif
 
+#ifndef HAVE_ROUNDF
+#ifdef HAVE_ROUND
+#define roundf(a) ((float)round(a))
+#else
+float roundf(float x);
 #endif
+#endif
+
+#endif
Index: include/asterisk/autoconfig.h.in
===================================================================
--- include/asterisk/autoconfig.h.in	(revision 379425)
+++ include/asterisk/autoconfig.h.in	(working copy)
@@ -679,6 +679,9 @@
 /* Define to 1 if you have the `round' function. */
 #undef HAVE_ROUND
 
+/* Define to 1 if you have the `roundf' function. */
+#undef HAVE_ROUNDF
+
 /* Define to 1 if you have the `roundl' function. */
 #undef HAVE_ROUNDL
 
Index: main/strcompat.c
===================================================================
--- main/strcompat.c	(revision 379425)
+++ main/strcompat.c	(working copy)
@@ -16,7 +16,9 @@
 
 /*! \file
  *
- * \brief Compatibility functions for strsep and strtoq missing on Solaris 
+ * \brief Compatibility functions for strsep and strtoq missing on Solaris
+ *
+ * .. and lots of other functions too.
  */
 
 /*** MODULEINFO
@@ -568,3 +570,15 @@
 	return mktemp_internal(path, 0, MKTEMP_DIR) ? NULL : path;
 }
 #endif
+
+#ifndef HAVE_ROUNDF
+#ifndef HAVE_ROUND
+float roundf(float x) {
+	if (x < 0.0) {
+		return (float)(int)((x) - 0.5);
+	} else {
+		return (float)(int)((x) + 0.5);
+	}
+}
+#endif
+#endif