+ AC_ARG_ENABLE([gcrypt-pbkdf2], AS_HELP_STRING([--enable-gcrypt-pbkdf2],[force enable internal gcrypt PBKDF2]),
+ if test "x$enableval" = "xyes"; then
+ [use_internal_pbkdf2=0]
+ else
+ [use_internal_pbkdf2=1]
+ fi,
+ [AM_PATH_LIBGCRYPT([1.6.1], [use_internal_pbkdf2=0], [use_internal_pbkdf2=1])])