enhanced pfmod loading code

configure

@@ -677,6 +677,8 @@ PTHREAD_LIBS
 PTHREAD_CC
 ax_pthread_config
 LIBM
+MACOSX_FALSE
+MACOSX_TRUE
 WIN32_FALSE
 WIN32_TRUE
 LIBTOOL_DEPS
@@ -782,7 +784,6 @@ infodir
 docdir
 oldincludedir
 includedir
-runstatedir
 localstatedir
 sharedstatedir
 sysconfdir
@@ -876,7 +877,6 @@ datadir='${datarootdir}'
 sysconfdir='${prefix}/etc'
 sharedstatedir='${prefix}/com'
 localstatedir='${prefix}/var'
-runstatedir='${localstatedir}/run'
 includedir='${prefix}/include'
 oldincludedir='/usr/include'
 docdir='${datarootdir}/doc/${PACKAGE_TARNAME}'
@@ -1129,15 +1129,6 @@ do
   | -silent | --silent | --silen | --sile | --sil)
     silent=yes ;;
 
-  -runstatedir | --runstatedir | --runstatedi | --runstated \
-  | --runstate | --runstat | --runsta | --runst | --runs \
-  | --run | --ru | --r)
-    ac_prev=runstatedir ;;
-  -runstatedir=* | --runstatedir=* | --runstatedi=* | --runstated=* \
-  | --runstate=* | --runstat=* | --runsta=* | --runst=* | --runs=* \
-  | --run=* | --ru=* | --r=*)
-    runstatedir=$ac_optarg ;;
-
   -sbindir | --sbindir | --sbindi | --sbind | --sbin | --sbi | --sb)
     ac_prev=sbindir ;;
   -sbindir=* | --sbindir=* | --sbindi=* | --sbind=* | --sbin=* \
@@ -1275,7 +1266,7 @@ fi
 for ac_var in	exec_prefix prefix bindir sbindir libexecdir datarootdir \
 		datadir sysconfdir sharedstatedir localstatedir includedir \
 		oldincludedir docdir infodir htmldir dvidir pdfdir psdir \
-		libdir localedir mandir runstatedir
+		libdir localedir mandir
 do
   eval ac_val=\$$ac_var
   # Remove trailing slashes.
@@ -1428,7 +1419,6 @@ Fine tuning of the installation directories:
   --sysconfdir=DIR        read-only single-machine data [PREFIX/etc]
   --sharedstatedir=DIR    modifiable architecture-independent data [PREFIX/com]
   --localstatedir=DIR     modifiable single-machine data [PREFIX/var]
-  --runstatedir=DIR       modifiable per-process data [LOCALSTATEDIR/run]
   --libdir=DIR            object code libraries [EPREFIX/lib]
   --includedir=DIR        C header files [PREFIX/include]
   --oldincludedir=DIR     C header files for non-gcc [/usr/include]
@@ -17191,9 +17181,15 @@ case "$host" in
 *-*-mingw*|*-*-cygwin*)
 	#CFLAGS="$CFLAGS -D_WIN32_WINNT=0x0400"
 	platform_win32=yes
+	platform_macosx=no
+	;;
+*-*-darwin*)
+	platform_win32=no
+	platform_macosx=yes
 	;;
 *)
 	platform_win32=no
+	platform_macosx=no
 	;;
 esac
  if test "x${platform_win32}" = "xyes" ; then
@@ -17204,6 +17200,14 @@ else
   WIN32_FALSE=
 fi
 
+ if test "x${platform_macosx}" = "xyes" ; then
+  MACOSX_TRUE=
+  MACOSX_FALSE='#'
+else
+  MACOSX_TRUE='#'
+  MACOSX_FALSE=
+fi
+
 
 LIBM=
 case $host in
@@ -21444,6 +21448,10 @@ if test -z "${WIN32_TRUE}" && test -z "${WIN32_FALSE}"; then
   as_fn_error $? "conditional \"WIN32\" was never defined.
 Usually this means the macro was only invoked conditionally." "$LINENO" 5
 fi
+if test -z "${MACOSX_TRUE}" && test -z "${MACOSX_FALSE}"; then
+  as_fn_error $? "conditional \"MACOSX\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
 
 if test -z "${ENABLE_CXX_TRUE}" && test -z "${ENABLE_CXX_FALSE}"; then
   as_fn_error $? "conditional \"ENABLE_CXX\" was never defined.