lcov respectively geninfo cannot read gcda files

Question

I'm are trying to setup lcov on a local Windows computer using cygwin and the bash shell. I installed the newest version of lcov downloaded from here: lcov at sourceforge.

When I call a specific gcda file, then I get an output. The call is: lcov -c -d FileName.gcda -o outputfile.info

As far as I read usually lcov shall be able to iterate over all gcda files in a folder. My call for rotating over all gcda files is:

lcov -c -d . -o outputfile.info

With the above code I get the following output:

Capturing coverage data from .
Found gcov version 6.4.0
Scanning . for .gcda files ...
geninfo: WARNING: no .gcda files found in . - skipping!
Finished .info-file creation

Here a screenshot: As can be seen, there is a CanAdapter.gcda and CanAdapter.gcno, but with the configuration above geninfo produces a failure.

When I try to make a call like this:

lcove -c -d *.gcda -o outputfile.info

I get the following answer:

lcov: Extra parameter found: 'FileName2.gcda'
Use lcov --help to get usage information

I read the help, and it doesn't help as much as I need.

score 0 · Answer 1 · answered Mar 12 '19 at 13:14

0

According to the lcov manpage -d is used to specify a directory to use.

So try

-d .

answered Mar 12 '19 at 13:14

arved

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Thank you for your answer. As you can see, I add to my posting a screenshot for better understanding. As you can see, there ist the "-d ." parameter in my call of lcov. – MarksSO Mar 13 '19 at 17:03
I am sorry, I used lcov exactly like this and it works. On Linux I would now run strace to find out, why it doesn't find the file, but I am not sure about Windows – arved Mar 13 '19 at 17:16

score 0 · Answer 2 · answered Mar 14 '19 at 10:29

0

I run lcov on Linux like this :

lcov --c --directory . --output-file main.info

This works fine with my setup.Try running pwd when you open shell to see if you are currently in the same directory or not.

answered Mar 14 '19 at 10:29

VVish

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score 0 · Accepted Answer · answered Mar 27 '19 at 14:15

I found the answer to my problem.

On windows machine there are two possibilities to run lcov.

In the cygwin folder there is a batch script calling "Cygwin.bat". Run this script. When the scripts opens type the following line:

lcov -c -d /cygdrive/c/path where the gcda files are located -o /cygdrive/c/path where the output folder is located/lcov.info

The same is to do with genhtml to create the html file.

You can open the windows cmd.exe. After this you need to add the following line:

sh -c -l "lcov -c -d /cygdrive/c/path where the gcda files are located -o /cygdrive/c/path where the output folder is located/lcov.info"

It is important to write

sh -c -l

and the lcov command in

" "

otherwise lcov and genhtml wont work.

lcov respectively geninfo cannot read gcda files

3 Answers3