PHP_ARG_WITH(shp, for shp support,
 [  --with-shp             Include shp support])

if test "$PHP_SHP" != "no"; then
   # --with-shp -> check with-path
   SEARCH_PATH="/usr/local /usr"     # you might want to change this
   SEARCH_FOR="/include/shapefil.h"  # you most likely want to change this
   if test -r $PHP_SHP/$SEARCH_FOR; then # path given as parameter
     SHP_DIR=$PHP_SHP
   else # search default path list
     AC_MSG_CHECKING([for shp files in default path])
     for i in $SEARCH_PATH ; do
       if test -r $i/$SEARCH_FOR; then
         SHP_DIR=$i
         AC_MSG_RESULT(found in $i)
       fi
     done
   fi
  
   if test -z "$SHP_DIR"; then
     AC_MSG_RESULT([not found])
     AC_MSG_ERROR([Please reinstall the shp distribution])
   fi

   # --with-shp -> add include path
   PHP_ADD_INCLUDE($SHP_DIR/include)

   # --with-shp -> check for lib and symbol presence
   LIBNAME=shp # you may want to change this
   LIBSYMBOL=SHPOpen # you most likely want to change this 

   PHP_CHECK_LIBRARY($LIBNAME,$LIBSYMBOL,
   [
     PHP_ADD_LIBRARY_WITH_PATH($LIBNAME, $SHP_DIR/lib, SHP_SHARED_LIBADD)
     AC_DEFINE(HAVE_SHPLIB,1,[ ])
   ],[
     AC_MSG_ERROR([wrong shp lib version or lib not found])
   ],[
     -L$SHP_DIR/lib -lm 
   ])
  
   PHP_SUBST(SHP_SHARED_LIBADD)

  PHP_NEW_EXTENSION(shp, shp.c, $ext_shared)
fi