Index: prismstumbler-0.7.4pre1/configure.ac
===================================================================
--- prismstumbler-0.7.4pre1.orig/configure.ac
+++ prismstumbler-0.7.4pre1/configure.ac
@@ -137,51 +137,11 @@ AC_ARG_ENABLE(static-libgps,
     ], [ static_libgps="no"]
 )
 
-AC_MSG_CHECKING(for libgps)
-AC_ARG_WITH(libgps,
-[  --with-libgps=DIR      use libgps in DIR],
-[ case "$withval" in
-  *)
-     AC_MSG_RESULT($withval)
-     if test -f $withval/include/gps.h -a -f $withval/lib/libgps.a; then
-        owd=`pwd`
-        if cd $withval; then withval=`pwd`; cd $owd; fi
-        libgps_dir=${withval}
-	GPSD_CFLAGS="-I$withval/include"
-        if test "x$static_libgps" = "xyes"; then
-	    GPSD_LIBS="-lm -lpthread $withval/lib/libgps.a"
-        else
-            GPSD_LIBS="-L$withval/lib -lgps"
-        fi
-     else
-        AC_ERROR(libgps not found in $withval prefix)
-     fi
-     ;;
-  esac ],
-[ 
-    for dir in ${prefix} ${prefix}/local /usr /usr/local; do
-    if test -f ${dir}/include/gps.h -a -f ${dir}/lib/libgps.a; then
-        libgps_dir=${dir}
-        GPSD_CFLAGS="-I${dir}/include"
-        if test "x$static_libgps" = "xyes"; then
-	    GPSD_LIBS="-lm -lpthread ${dir}/lib/libgps.a"
-        else
-            GPSD_LIBS="-L${dir}/lib -lgps"
-        fi
-    fi
-    done
-    if test -z ${libgps_dir}; then
-        AC_MSG_RESULT(no)
-        AC_ERROR(libgps not found)
-    fi
-    AC_MSG_RESULT(yes) ]
-)
+PKG_CHECK_MODULES([GPSD], [libgps])
 
 if test -z "$GPSD_CFLAGS"; then
     AC_ERROR("libgps not found")
 fi
-AC_SUBST(GPSD_CFLAGS)
-AC_SUBST(GPSD_LIBS)
 
 
 dnl Checks for wireless lib