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From: "xaizek at posteo dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug gcov-profile/89961] When "--intermediate-format" is used
 "--preserve-paths"/"--hash-filenames" is ignored
Date: Mon, 31 May 2021 12:28:59 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D89961

xaizek <xaizek at posteo dot net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |xaizek at posteo dot net

--- Comment #11 from xaizek <xaizek at posteo dot net> ---
> Closing this as fixed.

This isn't fixed. I don't think the problem was actually understood.

Say you have:

 * src/myclass.o
 * tests/myclass.o

If you run `gcov -p -x --json-format src/myclass.o` you get
myclass.gcov.json.gz for that file, running `gcov -p -x --json-format
tests/myclass.o` gives you myclass.gcov.json.gz for the test. Running `gcov=
 -p
-x --json-format src/myclass.o tests/myclass.o` gives myclass.gcov.json.gz =
*FOR
THE TEST ONLY*, because gcov created output for src/myclass.o and then repl=
aced
it.

>>From reading your comment I thought that maybe gcov combines information fr=
om
two files before writing the result to address this issue, but it doesn't.
Results you get depends on the order in which files are specified.

Either -p and -x need to be  obeyed or reports need to be merged. If combin=
ing
is implemented, might as well combine all reports and write a single file
specified on command line (--json-format=3Dmyfile.gz or --json-format=3D- (=
no
compression needed)).=