问题
So I've checked out and built the clang trunk by following these instructions http://clang.llvm.org/get_started.html. I can build my binary with --coverage and run it to get the .gcno and .gcda files, but when I run lcov I get "GENINFO: ... reached unexpected end of file".
Now I'm stuck and came to SO to look for help :)
I'm working with Ubuntu 13.04 and writing c++11, just in case that makes a difference.
回答1:
I had the same problem with clang with lcov on Ubuntu 13.04. Here is the solution which worked for me on more than one Ubuntu setup.
- You will find there are two versions of gcov on Ubuntu. gcov-4.6.4 & gcov-4.7.3. By default the gcov link is set to gcov-4.7.3. Change that to gcov-4.6.4
- Furthermore, use lcov version 1.10 instead of what is available via apt-get install
This should generate the code coverage report.
EDIT: Mine was a upgrade from Ubuntu 12.04 to 13.04. Just in case you don't see two versions of gcov.
回答2:
Just summarising the steps for the answer already shared by @Himanshu in case somebody's looking for the exact steps to go about it:
Install gcc 4.6
sudo apt-get-install -y gcc-4.6
I couldn’t find locv 1.10 version out of the box so I compiled it myself:
git clone https://github.com/linux-test-project/lcov.git
cd lcov
Switch to a new branch with the commit that published lcov 1.10 version as base
git checkout -b 1_10 b5c1bdd
Compile lcov
sudo make install
Confirm that lcov installed is 1.10
lcov --version
With all these things in place, use the command:
lcov --gcov-tool /usr/bin/gcov-4.6 --capture -d gcov_data/ -o gcov_data/coverage.info
This avoids tinkering with the link of the default gcov on the system.
Then generate the visual coverage file
genhtml -o gcov_data/html gcov_data/coverage.info
where gcov_data is the folder containing the gcno and gcda files.
来源：https://stackoverflow.com/questions/17758126/clang-code-coverage-invalid-output