[libvirt] How to get GCOV result of make check?

Hi all: I want to get the coverage result of 'make check', here is my way: 1. ./configure ***** 2. make clean -j *3*. find ./ -name Makefile |xargs sed -i "s/\= gcc/= gcc -fprofile-arcs -ftest-coverage/g" # add gcov-related cflags 4. make check -j 5. lcov -d . -c -o libvirt.info 6. genhtml libvirt.info -o libvirtresult My key work Is step 3, however, I don't think it's a graceful way to get gcov result. How do you usually get the gcov results, thanks! Oscar.