community/prometheus: fix provided ldflags
-extldflags
is used to provide LDFLAGS to the external linker.
159018314b (community/prometheus: fix provided ldflags, 2020-09-19)
extended LDFLAGS with flags that are meant for Go itself. As long as
$LDLFAGS
is set to a value this works.
But when $LDFLAGS
is empty, it would pass the flags ment for Go to the
external linker, which will then error with a usage message.
Fix this by only supply -extldflags when $LDFLAGS
is not empty.
Edited by Kevin Daudt