T.83.2: Need -lm for round().

configure

@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.69 for RT/TTS T.83.1.
+# Generated by GNU Autoconf 2.69 for RT/TTS T.83.2.
 #
 # Report bugs to <felicity@loreley.flyingparchment.org.uk>.
 #
@@ -580,8 +580,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='RT/TTS'
 PACKAGE_TARNAME='rt-tts'
-PACKAGE_VERSION='T.83.1'
+PACKAGE_VERSION='T.83.2'
-PACKAGE_STRING='RT/TTS T.83.1'
+PACKAGE_STRING='RT/TTS T.83.2'
 PACKAGE_BUGREPORT='felicity@loreley.flyingparchment.org.uk'
 PACKAGE_URL=''
 
@@ -1232,7 +1232,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures RT/TTS T.83.1 to adapt to many kinds of systems.
+\`configure' configures RT/TTS T.83.2 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1293,7 +1293,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of RT/TTS T.83.1:";;
+     short | recursive ) echo "Configuration of RT/TTS T.83.2:";;
    esac
   cat <<\_ACEOF
 
@@ -1380,7 +1380,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-RT/TTS configure T.83.1
+RT/TTS configure T.83.2
 generated by GNU Autoconf 2.69
 
 Copyright (C) 2012 Free Software Foundation, Inc.
@@ -1749,7 +1749,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by RT/TTS $as_me T.83.1, which was
+It was created by RT/TTS $as_me T.83.2, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   $ $0 $@
@@ -4196,6 +4196,52 @@ fi
 done
 
 
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for round in -lm" >&5
+$as_echo_n "checking for round in -lm... " >&6; }
+if ${ac_cv_lib_m_round+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lm  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char round ();
+int
+main ()
+{
+return round ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_m_round=yes
+else
+  ac_cv_lib_m_round=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_m_round" >&5
+$as_echo "$ac_cv_lib_m_round" >&6; }
+if test "x$ac_cv_lib_m_round" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LIBM 1
+_ACEOF
+
+  LIBS="-lm $LIBS"
+
+fi
+
+
 oLDFLAGS="$LDFLAGS"
 LDFLAGS="$LDFLAGS -framework CoreFoundation -framework IOKit"
 for ac_func in IORegisterForSystemPower
@@ -4720,7 +4766,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by RT/TTS $as_me T.83.1, which was
+This file was extended by RT/TTS $as_me T.83.2, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -4782,7 +4828,7 @@ _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
-RT/TTS config.status T.83.1
+RT/TTS config.status T.83.2
 configured by $0, generated by GNU Autoconf 2.69,
   with options \\"\$ac_cs_config\\"
 

configure.ac

@@ -1,5 +1,5 @@
 AC_PREREQ([2.69])
-AC_INIT([RT/TTS], [T.83.1], [felicity@loreley.flyingparchment.org.uk])
+AC_INIT([RT/TTS], [T.83.2], [felicity@loreley.flyingparchment.org.uk])
 AC_CONFIG_SRCDIR([tts.c])
 AC_CONFIG_HEADERS([config.h])
 
@@ -14,6 +14,8 @@ LIBS="$oLIBS"
 
 AC_CHECK_HEADERS([IOKit/pwr_mgt/IOPMLib.h])
 
+AC_CHECK_LIB(m, round)
+
 oLDFLAGS="$LDFLAGS"
 LDFLAGS="$LDFLAGS -framework CoreFoundation -framework IOKit"
 AC_CHECK_FUNCS([IORegisterForSystemPower], [], [LDFLAGS="$oLDFLAGS"])