ptxdist: rework 'print' command

 - avoid "recipe for target '...' failed" messages
 - generate '<variable>=<value>' when running in verbose mode
 - produce and empty value instead of an error when "-k" is used

This makes is possible to use
$ ptxdist -v--k make print-<VAR1> print-<VAR2>·...
to dump a useful list of many variables that may or may not be defined.

Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>

1 files changed, 3 insertions, 0 deletions

diff --git a/bin/ptxdist b/bin/ptxdist
index a878fb6ff..8af0ac839 100755
--- a/bin/ptxdist
+++ b/bin/ptxdist
@@ -1971,6 +1971,9 @@ EOF
 			fi
 			while [ ${#} -gt 0 ]; do
 				if [ -n "${!1}" ]; then
+					if [ "${PTXDIST_VERBOSE}" = "1" ]; then
+						echo -n "${1}="
+					fi
 					echo "${!1}"
 				else
 					local check