add libtool major version detection to configure in prep for supporting both…

add libtool major version detection to configure in prep for supporting both libtool 2.x and 1.5.x at the same time

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@12922 d0543943-73ff-0310-b7d9-9358b9ac24b2

configure.in

@@ -76,6 +76,9 @@ m4_defun([_LT_AC_LANG_RC_CONFIG], [:])
 AM_PROG_CC_C_O
 AC_PROG_LIBTOOL
 
+libtool=$(switch_builddir)/libtool
+LIBTOOL_MAJOR_VERSION=`$libtool --version 2>/dev/null|sed -e 's/([^)]*)//g;s/^[^0-9]*//;s/[- ].*//g;q'| awk -F . '{print $1}'`
+
 #Check for compiler vendor
 AX_COMPILER_VENDOR
 
@@ -123,6 +126,13 @@ case "$host" in
     ;;
 esac
 
+
+LIBTOOL_LIB_EXTEN="$DYNAMIC_LIB_EXTEN"
+
+if test "$LIBTOOL_MAJOR_VERSION" -eq "2"; then
+   LIBTOOL_LIB_EXTEN="la"
+fi
+
 #  Enable 64 bit build
 AC_ARG_ENABLE(64,
 [AC_HELP_STRING([--enable-64],[build with 64 bit support])],[enable_64="$enable_64"],[enable_64="no"])
@@ -278,6 +288,7 @@ AC_SUBST(ESL_LDFLAGS)
 AC_SUBST(PLATFORM_CORE_DEPLIBS)
 AC_SUBST(SOLINK)
 AC_SUBST(DYNAMIC_LIB_EXTEN)
+AC_SUBST(LIBTOOL_LIB_EXTEN)
 
 # Checks for header files.
 AC_HEADER_DIRENT