[PATCH 4/4] options: discontinue -xversion=V as a valid option

DTrace allowed setting a previous version to operate in compatibility
mode.  Unfortunately, it was not fully implemented.  Translators are
not really versioned, and if a translator uses an identifier that does
not exist in the version specified in -xversion=V, data structures end
up corrupted.

Since the usefulness of -xversion=V seems to be less than the effort
needed to rectify the implementation, we are no longer supporting this
option.

Signed-off-by: Kris Van Hees <[email protected]>
---
 libdtrace/dt_options.c | 14 ++------------
 1 file changed, 2 insertions(+), 12 deletions(-)

diff --git a/libdtrace/dt_options.c b/libdtrace/dt_options.c
index 97516517..0a35e852 100644
--- a/libdtrace/dt_options.c
+++ b/libdtrace/dt_options.c
@@ -24,6 +24,7 @@
 #include <dt_pcap.h>
 #include <dt_string.h>
 #include <libproc.h>
+#include <port.h>
 
 static int
 dt_opt_agg(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
@@ -676,18 +677,7 @@ dt_opt_invcflags(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
 static int
 dt_opt_version(dtrace_hdl_t *dtp, const char *arg, uintptr_t option)
 {
-	dt_version_t v;
-
-	if (arg == NULL)
-		return dt_set_errno(dtp, EDT_BADOPTVAL);
-
-	if (dt_version_str2num(arg, &v) == -1)
-		return dt_set_errno(dtp, EDT_VERSINVAL);
-
-	if (!dt_version_defined(v))
-		return dt_set_errno(dtp, EDT_VERSUNDEF);
-
-	return dt_reduce(dtp, v);
+	return dt_set_errno(dtp, ENOTSUPP);
 }
 
 static int
-- 
2.51.0