add some more usefule variables to standalone_module configure sample script

build/standalone_module/configure.ac

@@ -8,12 +8,50 @@ AM_PROG_CC_C_O
 
 AC_PROG_LIBTOOL
 
+# backwards compat with older pkg-config
+# - pull in AC_DEFUN from pkg.m4
+m4_ifndef([PKG_CHECK_VAR], [
+# PKG_CHECK_VAR(VARIABLE, MODULE, CONFIG-VARIABLE,
+# [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
+# -------------------------------------------
+# Retrieves the value of the pkg-config variable for the given module.
+AC_DEFUN([PKG_CHECK_VAR],
+[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
+AC_ARG_VAR([$1], [value of $3 for $2, overriding pkg-config])dnl
+
+_PKG_CONFIG([$1], [variable="][$3]["], [$2])
+AS_VAR_COPY([$1], [pkg_cv_][$1])
+
+AS_VAR_IF([$1], [""], [$5], [$4])dnl
+])# PKG_CHECK_VAR
+])
+
+AC_DEFUN([PKG_CHECK_VER],
+[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
+AC_ARG_VAR([$1], [version for $2, overriding pkg-config])dnl
+
+_PKG_CONFIG([$1], [modversion], [$2])
+AS_VAR_COPY([$1], [pkg_cv_][$1])
+
+AS_VAR_IF([$1], [""], [$4], [$3])dnl
+])# PKG_CHECK_VAR
+
 PKG_CHECK_MODULES([FREESWITCH],[freeswitch],[],[])
 PKG_CHECK_VAR([moddir],[freeswitch],[modulesdir])
+PKG_CHECK_VAR([confdir],[freeswitch],[confdir])
+PKG_CHECK_VER([version],[freeswitch])
+
+SWITCH_VERSION_MAJOR=`echo $version|cut -d. -f1`
+SWITCH_VERSION_MINOR=`echo $version|cut -d. -f2`
+SWITCH_VERSION_MICRO=`echo $version|cut -d. -f3`
 
+AC_SUBST(SWITCH_VERSION_MAJOR, [$SWITCH_VERSION_MAJOR])
+AC_SUBST(SWITCH_VERSION_MINOR, [$SWITCH_VERSION_MINOR])
+AC_SUBST(SWITCH_VERSION_MICRO, [$SWITCH_VERSION_MICRO])
 AC_SUBST(FREESWITCH_CFLAGS)
 AC_SUBST(FREESWITCH_LDFLAGS)
 AC_SUBST(moddir)
+AC_SUBST(confdir)
 
 AC_CONFIG_FILES([Makefile])