--- configure.in.orig	2005-08-21 19:46:01.000000000 -0700

+++ configure.in	2013-04-27 15:59:33.668866955 -0700

@@ -6,54 +6,53 @@

 CFLAGS="-g -O2 -Wall -W -Wno-unused-parameter"

 ##CFLAGS="-g -O2 -Wall -W"

 AM_INIT_AUTOMAKE(libifp, 1.0.0.2)

 AC_PROG_CC

 AC_PROG_INSTALL

 AC_PROG_LIBTOOL

 AC_C_BIGENDIAN

 AC_SUBST(LIBTOOL_DEPS)

 dnl AC_DEFINE(IFP_AUTOCONF)

 #-----------------------------------------------------------------------

 build_userland=no

 dnl --with-libusb=PATH

 LIBUSB=""

 AC_MSG_CHECKING([libusb])

 AC_ARG_WITH(libusb,

 	AC_HELP_STRING([--with-libusb=PATH],[libusb path (default /usr)]),

 	ac_libusb=$enableval, ac_libusb=no)

-if test "x${ac_libusb}" != "xno" ; then

-		case ${with_libusb} in

-			"" | "yes" | "YES")

-				;;

-			"no" | "NO")

-				use_libusb=false

-				;;

-			*)

-				CFLAGS="$CFLAGS -I${with_libusb}/include"

-				CPPFLAGS="$CPPFLAGS -I${with_libusb}/include"

-				LDFLAGS="$LDFLAGS -L${with_libusb}/lib"

-				;;

-		esac

-fi

+case ${with_libusb} in

+    "" | "yes" | "YES")

+        ac_libusb=yes

+        ;;

+    "no" | "NO")

+        use_libusb=false

+        ;;

+    *)

+        CFLAGS="$CFLAGS -I${with_libusb}/include"

+        CPPFLAGS="$CPPFLAGS -I${with_libusb}/include"

+        LDFLAGS="$LDFLAGS -L${with_libusb}/lib"

+        ;;

+esac

 AC_MSG_RESULT(done)

 dnl check if libusb is available

 if test "x${ac_libusb}" != "xno" ; then

 	build_userland=yes

 	AC_CHECK_HEADERS(usb.h, [],

 		[ AC_MSG_WARN([usb.h not found, use --with-libusb=PATH]) ]; 

 		build_userland=no )

 	ac_save_LIBS="$LIBS"

 	AC_CHECK_LIB(usb, usb_init, [LIBUSB="$LIBUSB -lusb"],

 		[ AC_MSG_WARN([libusb not found]) ]; build_userland=no )

 dnl misc headers needed by the userland library

 	AC_CHECK_FUNC(strncasecmp, [], [ AC_MSG_WARN([strncasecmp not found, not building userland library]) ];

 		build_userland=no )

 	AC_CHECK_HEADERS(inttypes.h stdio.h sys/types.h wchar.h string.h time.h fts.h iconv.h,

 		[], [ AC_MSG_WARN([missing header, not building useland library]) ]; build_userland=no)