Makefile: Hide coverage helper targets if COV is not set
We only check COV=1 in `make coverage` before. This will result in
deleting all files in the current working directory if we accidentally
tried `make coverage_init`.
Hide coverage_init and coverage_html if COV is not set.
TEST=make coverage_init and see the error message
TEST=make clean && COV=1 make coverage -j
Signed-off-by: Hsuan Ting Chen <email@example.com>
Reviewed-by: Yu-Ping Wu <firstname.lastname@example.org>
1 file changed